| 久米 篤（くめ あつし） | データ更新日：2024.04.02 |
教授 ／
農学研究院
環境農学部門
サスティナブル資源科学講座
| 1. | Koji Matsunaga, Ryotaro Hara, Eitaro Fukatsu, Atsushi Watanabe, Atsushi Kume, Effect of the western conifer seed bug Leptoglossus occidentalis , an invasive alien insect, on seed production reduction in Japanese black pine Pinus thunbergii , Journal of Forest Research, https://doi.org/10.1080/13416979.2023.2291343, 2023.12. |
| 2. | 半場 祐子, 松本 真由, 清水 啓史, 山岸 彩, 木下 智光, Luisa Kumpsh, 久米 篤, 都市における環境ストレスに対する樹木の光合成応答, 光合成研究, 33, 2, 92-100, 2023.10, [URL]. |
| 3. | Tamotsu Hoshino, Yuka Yajima, Yosuke Degawa, Atsushi Kume, Oleg B Tkachenko, Naoyuki Matsumoto, Life Cycle Plasticity in Typhula and Pistillaria in the Arctic and the Temperate Zone, MICROORGANISMS, 10.3390/microorganisms11082028, 11, 8, 2028, 2023.08, [URL]. |
| 4. | Satoshi Fujii, Keisuke Nishida, Tomoko Kawaguchi Akitsu, Atsushi Kume, Yuko T Hanba, Variation in leaf mesophyll anatomy of fern species imposes significant effects on leaf gas exchange, light capture, and leaf hydraulic conductance, PHOTOSYNTHETICA, 10.32615/ps.2023.017, 61, 2, 225-235, 2023.05, [URL]. |
| 5. | Yuko T Hanba, Keisuke Nishida, Yuuri Tsutsui, Mayu Matsumoto, Yutarou Yasui, Yang Sizhe, Takumi Matsuura, Tomoko Kawaguchi Akitsu, Atsushi Kume, Leaf optical properties and photosynthesis of fern species with a wide range of divergence time in relation to mesophyll anatomy, ANNALS OF BOTANY, 10.1093/aob/mcad025, 131, 3, 437-450, 2023.04. |
| 6. | Inoue Mizuki, Yoshiharu Sango, Kiyoshi Ishida, Yuko T Hanba, Masaaki Chiwa, Yoshitoshi Uehara, Atsushi Kume, Effects of sex and soil water chemistry on leaf morphology and physiology of Myrica gale var. tomentosa, PLOS ONE, https://doi.org/10.1371/journal.pone.0275024, 17, 9, e0275024, 2022.09, [URL]. |
| 7. | Ryohei Yamaura, Daisuke Tamaoki, Hiroyuki Kamachi, Daisuke Yamauchi, Yoshinobu Mineyuki, Kentaro Uesugi, Masato Hoshino, Tomomi Suzuki, Toru Shimazu, Haruo Kasahara, Motoshi Kamada, Yuko T Hanba, Atsushi Kume, Tomomichi Fujita, Ichirou Karahara, Three-dimensionally visualized rhizoid system of moss, Physcomitrium patens, by refraction-contrast X-ray micro-computed tomography, MICROSCOPY, 10.1093/jmicro/dfac041, 2022.08. |
| 8. | Ryotaro Kitajima, Osamu Matsuda, Koji Mastunaga, Ryotaro Hara, Atsushi Watanabe, Atsushi Kume, Evaluation of thermoregulation of different pine organs in early spring and estimation of heat reward for the western conifer seed bug (Leptoglossus occidentalis) on male cones, PLOS ONE, 10.1371/journal.pone.0272565, 17, 8, 2022.08, [URL]. |
| 9. | Tomoko Kawaguchi Akitsu, Kenlo Nishida Nasahara, Osamu Ijima, Yasuo Hirose, Reiko Ide, Kentaro Takagi, Atsushi Kume, The variability and seasonality in the ratio of photosynthetically active radiation to solar radiation: A simple empirical model of the ratio, INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION, 10.1016/j.jag.2022.102724, 108, 2022.04. |
| 10. | Ryotaro Kitajima, Osamu Matsuda, Toshihiro Kumamaru, Atsushi Kume, Dark panicle color and high panicle position increase spikelet temperature of rice (Oryza sativa L.), JOURNAL OF AGRICULTURAL METEOROLOGY, 10.2480/agrmet.D-21-00032, 78, 2, 47-55, 2022.04. |
| 11. | Moein Farahnak, Keiji Mitsuyasu, Jun'ichiro Ide, Masaaki Chiwa, Tsutomu Enoki, Seonghun Jeong, Kyoichi Otsuki, Kuniyoshi Shimizu, Atsushi Kume, Soil pH and divalent cations after clear-cutting on a Japanese cypress plantation, JOURNAL OF FOREST RESEARCH, 10.1080/13416979.2022.2048987, 2022.03. |
| 12. | Mayu Matsumoto, Takashi Kiyomizu, Saya Yamagishi, Tomomitsu Kinoshita, Luisa Kumpitsch, Atsushi Kume, Yuko T Hanba , Responses of photosynthesis and long-term water use efficiency to ambient air pollution in urban roadside trees, URBAN ECOSYSTEMS, 10.1007/s11252-022-01212-z, 2022.02. |
| 13. | Hiroki Wakabayashi, Osamu Matsuda, Tomomichi Fujita, Atsushi Kume, Practical application of proximal sensing for monitoring the growth of Physcomitrium patens, Biological Sciences in Space, https://doi.org/10.2187/bss.35.32, 35, 32-40, 2021.08, [URL]. |
| 14. | Atsushi Kume, Hiroyuki Kamachi, Yusuke Onoda, Yuko T Hanba, Yuji Hiwatashi, Ichirou Karahara, Tomomichi Fujita, How plants grow under gravity conditions besides 1 g: perspectives from hypergravity and space experiments that employ bryophytes as a model organism, PLANT MOLECULAR BIOLOGY, 10.1007/s11103-021-01146-8, 2021.04, [URL]. |
| 15. | Hiroki Horike, Tomomitsu Kinoshita, Atsushi Kume, Yuko T. Hanba, Responses of leaf photosynthetic traits, water use efficiency, and water relations in five urban shrub tree species under drought stress and recovery, Trees - Structure and Function, https://doi.org/10.1007/s00468-021-02083-1, 2021.01, [URL]. |
| 16. | Atsushi Kume, Mao Fujimoto, Nobuya Mizoue, Hideharu Honoki, Haruki Nakajima, Megumi Ishida, Impact of reduced ozone concentration on the mountain forests of Mt. Tateyama, Japan, Environmental Pollution, 10.1016/j.envpol.2020.115407, 267, 2020.12, [URL], Recent decreases in regional tropospheric ozone concentrations have changed interspecific relationships between species sensitive to and tolerant of ozone.. |
| 17. | Tomomitsu Kinoshita, Atsushi Kume, Yuko T. Hanba, Seasonal variations in photosynthetic functions of the urban landscape tree species Gingko biloba photoperiod is a key trait, Trees - Structure and Function, https://doi.org/10.1007/s00468-020-02033-3, 35, 273-285, 2020.09, [URL], Key message: Seasonal variations in the leaf photosynthetic traits of an urban tree, Ginkgo biloba, were almost synchronized with the photoperiod. Non-stomatal limitations were a cue for photosynthesis in Ginkgo biloba. Photosynthetic functions, which are key traits in determining the carbon uptake of urban trees, exhibit significant seasonal variations in temperate zones. It is essential to clarify the seasonal dynamics of photosynthesis to evaluate the CO2 uptake in urban areas. We investigated seasonal variations in the photosynthetic traits of Ginkgo biloba, which is a major urban deciduous tall tree often planted in Japan. Seasonal variations in the leaf photosynthetic traits, including the maximum photosynthesis rate, maximum carboxylation rate, and mesophyll and stomatal conductance, were well fitted to quadratic models, in which they peaked around the summer solstice and then declined with time. Seasonal variations in the environmental variables, such as photoperiod, temperature, and solar radiation, were compared to those of the leaf photosynthetic traits, in which the photoperiod explained well variations in the leaf photosynthetic traits. Seasonal variations in photosynthesis were largely governed by non-stomatal limitations, i.e., mesophyll and biochemical limitations. The high synchrony of the photoperiod and photosynthetic traits during leaf maturation may cause an enhancement in the daily carbon uptake of G. biloba leaves around the summer solstice, which has the longest photoperiod, and thus, will lead to an increase in the annual carbon uptake.. |
| 18. | Shoko Tsuji, Toru Nakashizuka, Koichiro Kuraji, Atsushi Kume, Yuko T. Hanba, Sensitivity of stomatal conductance to vapor pressure deficit and its dependence on leaf water relations and wood anatomy in nine canopy tree species in a Malaysian wet tropical rainforest, Trees - Structure and Function, 10.1007/s00468-020-01998-5, 2020.06, [URL], Key message: Canopy tree species with a large mean xylem vessel diameter has a high sensitivity of stomatal conductance to vapor pressure deficit in a wet tropical rainforest in Malaysia. Abstract: We investigated the diurnal variation of stomatal conductance to water vapor (gs) and leaf water relations in nine tropical rainforest canopy tree species in Malaysia to investigate the sensitivity of stomatal conductance to VPD and its dependence on leaf water relations. We focused on the effect of wood anatomical properties on the stomatal sensitivity to VPD. Negative correlations were obtained between leaf-to-air VPD (VPDleaf) and gs for all species, in which interspecific variation was obtained for the sensitivity of gs to VPDleaf with the range of VPDleaf being 1.2–5.9 kPa. The species with large mean xylem vessel diameter had high sensitivity of gs to VPDleaf. Although significant variations were obtained among the species for leaf water relations, such as relative water content at the turgor loss point (RWCtlp) and water potential at the turgor loss point (Ψtlp), these water relations were not related to the stomatal sensitivity to VPDleaf. In the wet tropical forest in the present study, VPDleaf was the main regulator of gs in the nine tree species. The high sensitivity of gs to VPDleaf in the trees with a large vessel area may contribute to the maintenance of an adequate leaf water status, e.g., high levels of Ψleaf, throughout the day, across a period of varying air temperature.. |
| 19. | 藤田 知道, 久米 篤, 蒲池 浩之, 小野田 雄介, 半場 祐子, 日渡 祐二, 唐原 一郎, 1gとは異なる重力環境で植物はどのように育つのだろうか－コケ植物を用いた宇宙実験(スペース・モス)から期待できること－, BSJ-Review, 10.24480/bsj-review.11a6.00178, 11, 60-74, 2020.02, [URL]. |
| 20. | 久米 篤, 陸上の日射環境と光合成色素の吸収特性－高精度分光日射観測によって明らかになってきたこと－, 光合成研究, 29, 2, 116-124, 2019.09, [URL]. |
| 21. | Moein Farahnak, Keiji Mitsuyasu, Kyoichi Otsuki, Kuniyoshi Shimizu, Atsushi Kume, Factors determining soil water repellency in two coniferous plantations on a hillslope, Forests, 10.3390/f10090730, 10, 9, 2019.09, [URL], Soil water repellency (SWR) is a cause of low water infiltration, overland flow and soil erosion in mountainous coniferous plantations in Japan. The factors determining SWR intensity were investigated in two coniferous plantations of Chamaecyparis obtusa (Siebold et Zucc.) Endl. and Cryptomeria japonica (L.f.) D. Don, using intact tree plots and cut tree plots on the same hillslope. The SWR of Ch. obtusa plots was stronger than that of Cr. japonica plots. SWR intensity decreased after tree cutting. There were no significant differences in SWR upslope and downslope of individual trees/stumps for both tree species, though areas downslope of individual Ch. obtusa trees had higher SWR intensity than those upslope. SWR intensity and soil aggregate stability were positively correlated in the Ch. obtusa intact tree plot (r = 0.88, p |
| 22. | Moein Farahnak, Keiji Mitsuyasu, Seonghun Jeong, Kyoichi Otsuki, Masaaki Chiwa, Seyed Mohammad Moein Sadeghi, Atsushi Kume, Soil hydraulic conductivity differences between upslope and downslope of two coniferous trees on a hillslope, Journal of Forest Research, 10.1080/13416979.2019.1590967, 24, 3, 143-152, 2019.05, [URL], Standing trees influence the redistribution of soil water around the trunk and alter water movement under the canopy on hillslopes. We investigated soil properties around trees to clarify the effect of trees on soil hydraulic properties of soil surface layers on a slope. The intact tree and cut tree plots of two coniferous tree species, Cryptomeria japonica and Chamaecyparis obtusa, were considered in the northern part of Kyushu, Japan. The soil properties on the upslope and downslope of individual trees or stumps were compared. The soil near-saturated hydraulic conductivity (kns) on the upslope of individual trees and stumps was higher than that on the downslope for both species. Although the distribution patterns of kns were similar in all plots, the determinant factors of kns seemed to be different. In the Cr. japonica intact tree plot, more litter tended to accumulate on the upslope of individual trees, and it seemed to indirectly enhance kns. However, the results of the cut tree plot suggested that kns was affected by factors other than the litter layer biomass. In the Ch. obtusa intact plot, high water repellency of soil on the downslope of individual trees reduced kns. Organic matter tended to accumulate on the upslope of Ch. obtusa individual stumps and in combination with water repellency appeared to affect kns. Our findings showed that soil hydraulic conductivity was affected by the distance and direction from a tree on a slope and that the effect was maintained for a few years after cutting.. |
| 23. | Takashi Kiyomizu, Saya Yamagishi, Atsushi Kume, Yuko T. Hanba, Contrasting photosynthetic responses to ambient air pollution between the urban shrub Rhododendron × pulchrum and urban tall tree Ginkgo biloba in Kyoto city: stomatal and leaf mesophyll morpho-anatomies are key traits, Trees - Structure and Function, 10.1007/s00468-018-1759-z, 33, 1, 63-77, 2019.02, [URL], Key message: Rhododendron × pulchrum avoided air pollution by adjusting its stomatal density, while Ginkgo biloba tolerated air pollution via a small stomatal density and high mesophyll thickness. Abstract: Information on the physiological mechanisms underlying species-specific photosynthetic responses to ambient air pollution is essential for enhancing the multiple services provided by urban trees. We conducted an on-site investigation of Rhododendron × pulchrum and Ginkgo biloba, which are the most common shrub and tall roadside tree used in Japan, in order to clarify their photosynthetic responses at sites with different air pollution levels in Kyoto city, Japan. The shrub tree R. × pulchrum and tall tree G. biloba exhibited contrasting responses to air pollution mainly from automobile exhaust gas. R. × pulchrum had a lower photosynthetic rate and stomatal conductance at high-pollution sites than at low-pollution sites, while no reductions were observed at high-pollution sites for G. biloba. The stomatal density of R. × pulchrum negatively correlated with atmospheric nitrogen oxides (NO and NO2) concentrations. R. × pulchrum avoided the effects of air pollution by reducing stomatal density at high-pollution sites at the expense of reducing CO2 uptake, while G. biloba appeared to have the ability to tolerate high air pollution levels by reducing the pollution load per mesophyll cell surface area with a low stomatal density and large mesophyll thickness. In conclusion, R. × pulchrum and G. biloba both acclimate to urban environments through an avoidance or tolerance strategy for air pollution by regulating stomatal and/or mesophyll morphologies.. |
| 24. | Inoue Mizuki, Kiyoshi Ishida, Masaaki Chiwa, Yoshitoshi Uehara, Ken’ichi Shinozuka, Atsushi Kume, Nutrient deficiency promotes male-biased apparent sex ratios at the ramet level in the dioecious plant Myrica gale var. tomentosa in oligotrophic environments in bogs, Journal of Plant Research, 10.1007/s10265-018-1056-3, 131, 6, 973-985, 2018.11, [URL], In populations of dioecious plants, the differences in the cost of reproduction between male and female plants can promote a male-biased sex ratio. In this study, we examine the macronutrient levels in tissues of the dioecious wetland shrub Myrica gale to identify the cost of reproduction for male and female plants and to examine the effect of nutrients on the apparent sex ratio at the ramet level. We examined plants across 12 populations of M. gale inhabiting bogs and fens in Japan. For each population, we used line transects to estimate the apparent sex ratio and measured the concentrations of nitrogen (N), phosphorus (P), and potassium (K) in the leaves sampled from male and female plants and in the fruits from female plants. For five of the populations, we calculated the flowering frequency, mortality, and the recruitment rate (as the rate of clonal propagation). We found that the proportion of females was positively affected, and the male bias of sex ratios reduced, by increases in P concentration in leaves sampled from female plants. Neither mortality nor recruitment was affected by sex or by the nutrient concentration (P, K). The flowering frequency was not affected by sex or by K concentration, but decreased with decreases in the P concentration measured in leaves. This study confirmed that reproduction in M. gale is P-limited. We found no distinct differences in the flowering frequency, mortality, or recruitment rate between the male and female plants.. |
| 25. | Atsushi Kume, Tomoko Akitsu, Kenlo Nishida Nasahara, Why is chlorophyll b only used in light-harvesting systems?, Journal of Plant Research, 10.1007/s10265-018-1052-7, 131, 6, 973-985, 2018.11, [URL], Chlorophylls (Chl) are important pigments in plants that are used to absorb photons and release electrons. There are several types of Chls but terrestrial plants only possess two of these: Chls a and b. The two pigments form light-harvesting Chl a/b-binding protein complexes (LHC), which absorb most of the light. The peak wavelengths of the absorption spectra of Chls a and b differ by c. 20 nm, and the ratio between them (the a/b ratio) is an important determinant of the light absorption efficiency of photosynthesis (i.e., the antenna size). Here, we investigated why Chl b is used in LHCs rather than other light-absorbing pigments that can be used for photosynthesis by considering the solar radiation spectrum under field conditions. We found that direct and diffuse solar radiation (PARdir and PARdiff, respectively) have different spectral distributions, showing maximum spectral photon flux densities (SPFD) at c. 680 and 460 nm, respectively, during the daytime. The spectral absorbance spectra of Chls a and b functioned complementary to each other, and the absorbance peaks of Chl b were nested within those of Chl a. The absorption peak in the short wavelength region of Chl b in the proteinaceous environment occurred at c. 460 nm, making it suitable for absorbing the PARdiff, but not suitable for avoiding the high spectral irradiance (SIR) waveband of PARdir. In contrast, Chl a effectively avoided the high SPFD and/or high SIR waveband. The absorption spectra of photosynthetic complexes were negatively correlated with SPFD spectra, but LHCs with low a/b ratios were more positively correlated with SIR spectra. These findings indicate that the spectra of the photosynthetic pigments and constructed photosystems and antenna proteins significantly align with the terrestrial solar spectra to allow the safe and efficient use of solar radiation..  |
| 26. | Kaori Takemura, Rina Watanabe, Ryuji Kameishi, Naoya Sakaguchi, Hiroyuki Kamachi, Atsushi Kume, Ichirou Karahara, Yuko T. Hanba, Tomomichi Fujita, Hypergravity of 10g changes plant growth, anatomy, chloroplast size, and photosynthesis in the moss Physcomitrella patens, Microgravity Science and Technology, https://doi.org/10.1007/s12217-017-9565-6, 29, 6, 467-473, 2017.12, [URL], The photosynthetic and anatomical responses of bryophytes to changes in gravity will provide crucial information for estimating how these plant traits evolved to adapt to changes in gravity in land plant history. We performed long-term hypergravity experiments at 10g for 4 and 8 weeks using the moss Physcomitrella patens with two centrifuges equipped with lighting systems that enable long-term plant growth under hypergravity with irradiance. The aims of this study are (1) to quantify changes in the anatomy and morphology of P. patens, and (2) to analyze the post-effects of hypergravity on photosynthesis by P. patens in relation to these changes. We measured photosynthesis by P. patens for a population of gametophores (e.g., canopy) in Petri dishes and plant culture boxes. Gametophore numbers increased by 9% for a canopy of P. patens, with 24–27% increases in chloroplast sizes (diameter and thickness) in leaf cells. In a canopy of P. patens, the area-based photosynthesis rate (Acanopy) was increased by 57% at 10g. The increase observed in Acanopy was associated with greater plant numbers and chloroplast sizes, both of which involved enhanced CO2 diffusion from the atmosphere to chloroplasts in the canopies of P. patens. These results suggest that changes in gravity are important environmental stimuli to induce changes in plant growth and photosynthesis by P. patens, in which an alteration in chloroplast size is one of the key traits. We are now planning an ISS experiment to investigate the responses of P. patens to microgravity.. |
| 27. | Ken’ichi Shinozuka, Masaaki Chiwa, Ichiro Tayasu, Chikage Yoshimizu, Kyoichi Otsuki , Atsushi Kume, Differences in stream water nitrate concentrations between a nitrogen-saturated upland forest and a downstream mixed land use river basin, Hydrology, 10.3390/hydrology4030043, 4, 3, 43, 2017.09, [URL], Nitrogen (N) saturation of upland forests has been assumed to be a substantial N source downstream. However, removal processes of N, including assimilation and denitrification in the downstream area, have not been clarified. To evaluate the N removal processes, nitrate (NO3−) and organic N concentrations, as well as nitrogen isotope ratio (δ15N) and oxygen isotope ratio (δ18O) of NO3− were measured along three rivers of Tatara River Basin, Japan where upland forests have already been N-saturated. Geographic information system (GIS) based topographical analysis was also conducted to evaluate the land use as urban area in relation to topography. In two of the three rivers, NO3− concentrations did not increase from upstream to downstream, despite the potential non-point N sources of urban areas. In another river, NO3− concentrations rather decreased. The values of δ15N and δ18O of NO3− and organic N concentrations suggested the presence of denitrification and assimilation over N pollutants in the river whose watersheds have a lower percentage of urban area. The lower percentage of urban area could be explained by the lower topographic index. This study concluded that the NO3− leaching from upland N-saturated forests was substantially assimilated or denitrified in the downstream area.. |
| 28. | Tomoko Akitsu, Kenlo Nishida Nasahara, Yasuo Hirose, Osamu Ijima, Atsushi Kume, Quantum sensors for accurate and stable long-term photosynthetically active radiation observations, Agricultural and Forest Meteorology, 10.1016/j.agrformet.2017.01.011, 237-238, 171-183, 2017.05, [URL], Long-term accurate data of photosynthetically active radiation (PAR) are needed because PAR is one of the standard environmental statistics needed to evaluate plant photosynthesis. Therefore, PAR observation sites are globally distributed, particularly in flux observation sites. Quantum sensors have been used for half a century to observe PAR; however, their accuracy is still uncertain. This study evaluates the accuracies of nine quantum sensor products by examining their spectral and cosine responses. On the basis of these data as well as reference spectrum data provided by our standard spectrometric measurement, we performed the following analyses: (1) a simulation of errors caused by the sensors’ non-ideal spectral response in three types of radiation inputs (open sky, forest canopy transmission, and forest canopy reflection), (2) a simulation of the errors caused by a complex combination of the sensors’ non-ideal spectral and cosine responses in three diurnal variation types of incident radiation (clear sky, partial clouds, and an overcast sky), and (3) an observation of the sensors’ long-term sensitivity degradation outdoors. Based on the results, we recommend two quantum sensors with minimal errors, LI-COR LI-190 encased in a weather-proof external housing with a glass dome and PREDE PAR-02D. The findings of this study contribute in establishing a long-term PAR observation protocol and should become a basis for quality checks and controls of PAR observation values that have previously been obtained worldwide. . |
| 29. | Tomonori Tsunoda, Buntaro Kusumoto, Ken-ichi Okada, Yuko Aoshima, Atsushi Kume, The 30th anniversary of Ecological Research: past, present, and future, Ecological Research, 10.1007/s11284-017-1457-0, 32, 4, 451-457, 2017.04, [URL], In 2016, Ecological Research (ER) celebrated its 30th anniversary. ER’s goal is to be the leading ecological, evolutionary, and biodiversity journal in Asia. This article introduces the development of ER, improvements to its editorial system and their outcomes, and the strategies designed to achieve this goal. ER has already become a leading comprehensive and international publication as shown by statistical evidence and its strong editorial foundation. However, some members of the Ecological Society of Japan (ESJ) retain impressions of an old stereotype about ER. The discrepancy between the current status of the journal and its stereotype may explain why submissions from Japan remain static. A new article category for ER, Biodiversity in Asia, was created to encourage Asian studies. In addition, the Forum category is dedicated to promoting a broad understanding of the ESJ’s various activities. To promote open science, the proportion of open access articles in the journal is increasing. The publication of Data papers has been accelerated to improve the public availability of excellent open data sets. ER symposia and seminars provide good opportunities for members to participate. ER financially supports the invitation of scientists internationally to facilitate research exchanges with other countries and consequently promotes the internationalization of the ESJ. The ESJ is open to the world’s ecologists, and your participation in developing ER is welcome.. |
| 30. | Atsushi Kume, Importance of the green color, absorption gradient, and spectral absorption of chloroplasts for the radiative energy balance of leaves, Journal of Plant Research, 10.1007/s10265-017-0910-z, 130, 3, 501-514, 2017.03, [URL], Terrestrial green plants absorb photosynthetically active radiation (PAR; 400–700 nm) but do not absorb photons evenly across the PAR waveband. The spectral absorbance of photosystems and chloroplasts is lowest for green light, which occurs within the highest irradiance waveband of direct solar radiation. We demonstrate a close relationship between this phenomenon and the safe and efficient utilization of direct solar radiation in simple biophysiological models. The effects of spectral absorptance on the photon and irradiance absorption processes are evaluated using the spectra of direct and diffuse solar radiation. The radiation absorption of a leaf arises as a consequence of the absorption of chloroplasts. The photon absorption of chloroplasts is strongly dependent on the distribution of pigment concentrations and their absorbance spectra. While chloroplast movements in response to light are important mechanisms controlling PAR absorption, they are not effective for green light because chloroplasts have the lowest spectral absorptance in the waveband. With the development of palisade tissue, the incident photons per total palisade cell surface area and the absorbed photons per chloroplast decrease. The spectral absorbance of carotenoids is effective in eliminating shortwave PAR ( |
| 31. | Akihisa Mori, Hiroyuki Kamachi, Ichirou Karahara, Atsushi Kume, Yuko T Hanba, Kaori Takemura, Tomomichi Fujita, Comparisons of the effects of vibration of two centrifugal systems on the growth and morphological parameters of the moss Physcomitrella patens, Biological Sciences in Space, 10.2187/bss.31.9, 31, 9-13, 2017.03, [URL], As pioneer plants mosses are adaptable to extreme environments and are the first to colonize previously uncolonized land. Recently, we designed two centrifuges, MIJ-17 and MK-3, to investigate the effects of long-term cultivation under moderate hypergravity conditions on the growth of mosses. We examined the effects of the vibration generated by these centrifuges on the growth and morphological parameters of the moss Physcomitrella patens, because plants are generally sensitive to vibration. In MIJ-17, random vibration was detected by a micro three-axis acceleration sensor during centrifugation at 2, 5, and 10 G, whereas vibration was negligible in MK-3. Therefore, we compared the growth and morphological parameters of P. patens gametophores cultivated with MIJ-17 and MK-3 at 10 G. The vibration generated by MIJ-17 did not significantly affect the growth and morphological parameters of P. patens gametophores. Thus, we conclude that the vibration of MIJ-17 has a negligible impact on the growth of P. patens gametophores.. |
| 32. | Atsushi Takashima, Atsushi Kume, Shigejiro Yoshida, Mizoue Nobuya, Takuhiko Murakami, Historical logging and current successional status of old-growth Cryptomeria japonica forest on Yakushima Island, Journal of Forest Research, 10.1080/13416979.2016.1273085, 22, 2, 108-117, 2017.01, [URL], Estimation of the current successional status of long-lived coniferous forests is difficult especially after several hundred years of human disturbance. However, in Cryptomeria japonica forest on Yakushima Island, the stumps generated by logging activities from the seventeenth to nineteenth centuries remain almost intact without intense rotting. From an inventory of these stumps and long-term monitoring of current stands for more than 25 years, we estimated the forest condition before logging and evaluated the current status of secondary succession. The size structure of Cr. japonica stumps suggested the stumps were composed of two different generations: the stumps of trees present before initiation of logging; and those of trees that regenerated after initiation of logging. In the current forest, the stem number of canopy species is decreasing and that of understory broad-leaved species is increasing. Regenerating Cr. japonica individuals are rare. Before the logging, the forest contained a larger number of larger Cr. japonica trees than the current forest. The results of monitoring the current forest suggested that all coniferous species, including Cr. japonica, were still undergoing self-thinning. The current Cr. japonica forest is in an intermediate stage of secondary succession, but the processes of succession are markedly different between the study plots, depending on their location or previous logging intensity.. |
| 33. | Kaori Takemura, Hiroyuki Kamachi, Atsushi Kume, Tomomichi Fujita, Ichirou Karahara, Yuko T. Hanba, A hypergravity environment increases chloroplast size, photosynthesis, and plant growth in the moss Physcomitrella patens, Journal of Plant Research, 10.1007/s10265-016-0879-z, 130, 1, 181-192, 2016.11, [URL], The physiological and anatomical responses of bryophytes to altered gravity conditions will provide crucial information for estimating how plant physiological traits have evolved to adapt to significant increases in the effects of gravity in land plant history. We quantified changes in plant growth and photosynthesis in the model plant of mosses, Physcomitrella patens, grown under a hypergravity environment for 25 days or 8 weeks using a custom-built centrifuge equipped with a lighting system. This is the first study to examine the response of bryophytes to hypergravity conditions. Canopy-based plant growth was significantly increased at 10×g, and was strongly affected by increases in plant numbers. Rhizoid lengths for individual gametophores were significantly increased at 10×g. Chloroplast diameters (major axis) and thicknesses (minor axis) in the leaves of P. patens were also increased at 10×g. The area-based photosynthesis rate of P. patens was also enhanced at 10×g. Increases in shoot numbers and chloroplast sizes may elevate the area-based photosynthesis rate under hypergravity conditions. We observed a decrease in leaf cell wall thickness under hypergravity conditions, which is in contrast to previous findings obtained using angiosperms. Since mosses including P. patens live in dense populations, an increase in canopy-based plant numbers may be effective to enhance the toughness of the population, and, thus, represents an effective adaptation strategy to a hypergravity environment for P. patens.. |
| 34. | Yuichi Kagotani, Keisuke Nishida, Takashi Kiyomizu, Keisuke Sasaki, Atsushi Kume, Yuko T. Hanba, Photosynthetic responses to soil water stress in summer in two Japanese urban landscape tree species (Ginkgo biloba and Prunus yedoensis): effects of pruning mulch and irrigation management, Trees, 10.1007/s00468-015-1312-2, 30, 3, 697-708, 2016.06, [URL], Stomatal regulation involves beneficial effects of pruning mulch and irrigation on leaf photosynthesis in Prunus yedoensis and Ginkgo biloba under moderate drought. G. biloba showed conservative water use under drought. Abstract: Leaf photosynthesis is highly sensitive to soil water stress via stomatal and/or biochemical responses, which markedly suppress the growth of landscape trees. Effective irrigation management to maintain leaf photosynthesis and information on species-specific photosynthetic responses to soil water stress are essential for the sustainable management of landscape trees in Japan, in which summer drought often occurs. In order to investigate effective irrigation management, we used plants with moderate soil water stress as controls, and examined the effects of daily irrigation and pruning mulch on leaf photosynthesis in container-grown Ginkgo biloba and Prunus yedoensis, which are the first and second main tall roadside trees in Japan. Stomatal conductance was significantly increased by pruning mulch and daily irrigation, with similar increases in leaf photosynthesis being observed in P. yedoensis and G. biloba. In order to obtain information on species-specific photosynthetic responses to soil water stress, we compared the responses of leaf photosynthesis and leaf water status to reductions in soil water content (SWC) between the two species. G. biloba maintained a constant leaf water potential, leaf water content, maximum carboxylation rate, and electron transport rate with reductions in SWC, whereas reductions were observed in P. yedoensis. We concluded that pruning mulch and irrigation effectively offset the negative impact of moderate water stress on leaf photosynthesis in summer in P. yedoensis and G. biloba via stomatal regulation, and also that G. biloba maintained its photosynthetic biochemistry and leaf water status better than P. yedoensis under severe water stress.. |
| 35. | Ken’ichi Shinozuka, Masaaki Chiwa, Koji Nakamura, Seiya Nagao, Atsushi Kume, Stream water nitrogen eutrophication during non-irrigated periods in a paddy-dominated agricultural basin in a snowfall area in Japan, Water, Air, & Soil Pollution, DOI: 10.1007/s11270-016-2906-z, 227, 219, 2016.05, [URL]. |
| 36. | Atsushi Kume, Tomoko Akitsu, Kenlo Nishida Nasahara, Leaf color is fine-tuned on the solar spectra to avoid strand direct solar radiation, Journal of Plant Research, 10.1007/s10265-016-0809-0, 129, 4, 615-624, 2016.03, [URL], The spectral distributions of light absorption rates by intact leaves are notably different from the incident solar radiation spectra, for reasons that remain elusive. Incident global radiation comprises two main components; direct radiation from the direction of the sun, and diffuse radiation, which is sunlight scattered by molecules, aerosols and clouds. Both irradiance and photon flux density spectra differ between direct and diffuse radiation in their magnitude and profile. However, most research has assumed that the spectra of photosynthetically active radiation (PAR) can be averaged, without considering the radiation classes. We used paired spectroradiometers to sample direct and diffuse solar radiation, and obtained relationships between the PAR spectra and the absorption spectra of photosynthetic pigments and organs. As monomers in solvent, the spectral absorbance of Chl a decreased with the increased spectral irradiance (W m-2 nm-1) of global PAR at noon (R2 = 0.76), and was suitable to avoid strong spectral irradiance (λmax = 480 nm) rather than absorb photon flux density (μmol m-2 s-1 nm-1) efficiently. The spectral absorption of photosystems and the intact thallus and leaves decreased linearly with the increased spectral irradiance of direct PAR at noon (Idir-max), where the wavelength was within the 450–650 nm range (R2 = 0.81). The higher-order structure of photosystems systematically avoided the strong spectral irradiance of Idir-max. However, when whole leaves were considered, leaf anatomical structure and light scattering in leaf tissues made the leaves grey bodies for PAR and enabled high PAR use efficiency. Terrestrial green plants are fine-tuned to spectral dynamics of incident solar radiation and PAR absorption is increased in various structural hierarchies.. |
| 37. | Tomoko Akitsu, Atsushi Kume, Yasuo Hirose, Osamu Ijima, Kenlo Nishida Nasahara, On the stability of radiometric ratios of photosynthetically active radiation to global solar radiation in Tsukuba, Japan, Agricultural and Forest Meteorology, 10.1016/j.agrformet.2015.04.026, 209-210, 59-68, 2015.06, [URL], The precise measurement of incident photosynthetically active radiation (PAR) is crucial for the estimation of ecosystem vegetation productivity. However, reliable values of PAR are seldom measured routinely. Instead, it is sometimes estimated based on solar radiation (RS). One popular estimation method is by use of the conversion ratio PAR/RS. Depending on whether PAR is expressed in energy units (PE, W m−2) or photon units (PP, μmol m−2 s−1), there are two types of conversion ratios: PE/RS (unitless), or PP/RS (μmol J−1). Moreover, to translate PAR expressed in one unit to another, the ratio PP/PE (μmol J−1) is also important. However, past studies have not led to a general understanding of these ratios, mainly due to instrumental errors such as cosine errors. To reduce such errors, we developed a new PAR measurement system using grating spectroradiometers mounted on sun trackers to measure direct and diffuse PAR separately. This study aims to clarify the characteristics of these three ratios by the new precise measurement and radiative transfer simulation. We carried out measurements for one year in Tsukuba, Japan (36.05° N, 140.13° E). PE/RS increased with water vapor pressure (e) from 0.40 to 0.47. It increased with decreasing clearness index (kT), but did not strongly depend on solar zenith angle (θ). PP/RS also increased with e from 1.9 μmol J-1 to 2.2 μmol J-1. Its dependence on climatic factors was similar to that of PE/RS. PP/PE varied by about 3% around the value of 4.57 μmol J-1. This study implies that PAR can be estimated from RS and the conversion ratios with an error up to about 10%.. |
| 38. | Yoshitoshi Uehara, Atsushi Kume, Masaaki Chiwa, Hideharu Honoki, Jing Zhang, Koichi Watanabe, Atmospheric deposition and interactions with Pinus pumila Regal canopy on Mt. Tateyama in the Northern Japanese Alps, Arctic, Antarctic, and Alpine Research, 10.1657/AAAR0013-126, 47, 2, 199-209, 2015.05, To estimate the impact of atmospheric deposition on alpine ecosystems, we evaluated the interactions between atmospheric deposition and the Pinus pumila canopy close to the summit of Mt. Tateyama, Central Japan. We analyzed the chemical characteristics of rain, fog, and throughfall under the canopy in the summer time for 5 years. The concentrations of inorganic nitrogen and sulfate in precipitation at the summit (2839 m a.s.l.) were lower than at the base (13 m a.s.l.), but the total amounts deposited tended to be larger, because the precipitation was greater at the summit and highly concentrated fog water was deposited on the pine canopy. Large fluctuations in the quality and quantity of deposition were due to interannual variations in the meteorological conditions. About 80 % of NO3--N and NH4+-N (0.40 and 0.47 kg ha-1 month-1) from rain and fog were retained in the P. pumila canopy, and contributions from fog were twice those from rain. Considerable amounts of K+, Mg2+, and Ca2+ ions (0.97, 0.13, and 0.13 kg ha-1 month-1) were leached out from the canopy to the soil as throughfall. The leaching did not increase with rainfall, but increased as the duration of the fog and dew increased.. |
| 39. | 馬渕哲也, 久米 篤, 田代 直明, 井上幸子, 長慶一郎, 緒方健人, 南木大介, 菱 拓雄, 古賀 信也, 九州大学北海道演習林産カラマツ材を用いた「からまつ講義棟」の建築について, 九州大学演習林報告, 95, 35-44, 2014.03, [URL]. |
| 40. | Masaaki Chiwa, Sachiko Inoue, Naoaki Tashiro, Daisuke Ohgi, Yoshitoshi Uehara, Hideaki Shibata, Atsushi Kume, Assessing the role of forests in mitigating eutrophication downstream of pasture during spring snowmelt, Hydrological Process, 10.1002/hyp.10189, 29, 4, 615-623, 2014.03, [URL], Little research has examined whether forests reduce stream water eutrophication in agricultural areas during spring snowmelt periods. This study evaluated the role of forests in ameliorating deteriorated stream water quality in agricultural areas, including pasture, during snowmelt periods. Temporal variation in stream water quality at a mixed land-use basin (565 ha: pasture 13%, forestry 87%), northern Japan, was monitored for 7 years. Synoptic stream water sampling was also conducted at 16 sites across a wide range of forest and agricultural areas in a basin (18.3 km2) in spring, summer and fall. Atmospheric nitrogen (N) and phosphorus (P) deposition were measured for 4 years. The results showed that concentration pulses of nitrate, organic N and total P in stream water were observed when discharge increased during spring snowmelt. Their concentrations were high when silicate concentrations were low, suggesting surface water exported from pasture largely contributed to stream water pollution during snowmelt. Atmospheric N and P deposition (4.1 kgNha-1 y-1; 0.09 kg P ha-1 y-1, respectively) was too low to affect the background concentrations of N and P in streams from forested areas. Reduction of eutrophication caused by nutrients from pasture was mainly due to dilution by water containing low concentrations of N and P exported from forested areas, whereas instream reduction was not a dominant process. Results indicate that forests have a limited capacity to reduce the concentration pulses of N and P in stream water during snowmelt in this study basin.. |
| 41. | Inoue Mizuki, Atsushi Kume, Masaaki Chiwa, Yoshitoshi Uehara, Kiyoshi Ishida, Impact of soil water chemistry on the apparent sex ratio of the flowering ramets of the dioecious plant Myrica gale var. tomentosa, Journal of Plant Research, 10.1007/s10265-012-0481-y, 125, 5, 631-641, 2012.09, [URL], We determined whether the apparent (M/Fl) sex ratio (male ramets/flowering ramets) and apparent reproductive ramet ratio (Fl/Li ratio; flowering ramets/living ramets) in 15 Myrica gale var. tomentosa populations varied with dissolved total nitrogen, dissolved total phosphorus, potassium, magnesium, calcium, or pH in the soil water. Our aim was to define the environmental factors affecting the M/Fl sex ratio and Fl/Li ratio of the populations. We also examined the habitat conditions of these populations by analyzing soil water chemistry and water dynamics. In 2007, 3 of the 15 populations had no females. The remaining 12 had significantly male-biased (M/Fl sex ratio = 0.59–0.97). Although we could not explain the absence of females by the current potassium levels alone, as potassium increased, so did the M/Fl sex ratio. As nitrogen increased and potassium decreased, Fl/Li ratio decreased. Our soil water chemistry analyses suggested that the potassium supply by soil surface erosion from flooding and the inflow of anthropogenic nitrogen were the important factors influencing the M/Fl sex ratio and Fl/Li ratio. Nitrogen management would be important in one of the endangered populations where inflow of nitrogen was the highest among 15 habitats. . |
| 42. | Masaaki Chiwa, Toshihide Matsuda, Nobutake Nakatani, Tsuyoshi Kobayashi, Atsushi Kume, Hiroshi Sakugawa, Effects of canopy N uptake on foliar CO2 assimilation rates and biomass production and allocation in Japanese red pine seedlings, Canadian Journal of Forest Research, 10.1139/x2012-091, 42, 7, 1395-1403, 2012.07, [URL], To investigate the direct physiological effects of CNU (canopy nitrogen uptake), three mist solutions (control, N1, and N2 with 0.03, 13.1, and 32.7 kg NH4+-N·ha–1, respectively) were sprayed on Japanese red pine (Pinus densiflora Sieb. et Zucc.) seedlings three times a week for three months. Waterproof sheets protected the surface soil during misting to avoid adding N to the soil. The results show N mist treatments to foliage increased needle N availability in proportion to N dose, which was large enough to cause greater N and chlorophyll content in the needles. This suggests that N is rapidly absorbed, is directly assimilated by the needles, and is used in photosynthesis. These increases resulted in higher maximum net CO2 assimilation rates (Amax) and maximum quantum yield of PSII photochemistry (Fv/Fm) of pine seedlings and subsequently increased bud and root biomass. Increased root biomass reduced the sensitivity of the shoot-to-root ratio to increased N availability in the foliage. In conclusion, our study supported the idea that CNU should be taken into consideration when evaluating the impacts of elevated atmospheric N deposition on forest C sequestration and biomass allocation.. |
| 43. | Masaaki Chiwa, Norio Onikura, Jun’ichiro Ide, Atsushi Kume, Impact of N-Saturated upland forests on downstream N pollution in the Tatara River Basin, Japan, Ecosystems, 10.1007/s10021-011-9505-z, 15, 2, 230-241, 2012.03, [URL], This study evaluated whether nitrogen (N) saturated upland forests can degrade downstream water quality in the Tatara River Basin, northern Kyushu, western Japan. Our hypothesis is that elevated atmospheric N deposition degrades downstream water quality in a watershed containing N-saturated forests because a considerable amount of atmospherically deposited N passes into the streams without being retained. Synoptic stream water samplings were conducted at 23 sites across a wide range of land-use categories in the basin over 1 year. A long-term temporal analysis of downstream water quality over the last 30 years (1977–2007) was conducted and compared with long-term trends in related factors such as urban/agricultural activity, sewage wastewater treatment, atmospheric N deposition, and forest condition. The results showed that atmospherically deposited N to N-saturated forests can be a large enough non-point source of N leaving the watershed to impact downstream water quality. This was highlighted by the reduction in pollutant exports derived from urban/agricultural activities, an increase in atmospheric N deposition, and the maturation of coniferous plantation forests in the past 30 years. These have led to reductions in total phosphorus and organic nitrogen concentrations in downstream water, whereas downstream nitrate (NO3 −) concentrations increased over the last 30 years. The consequent increase in the downstream N:P ratio indicated P limitation. Reducing the NO3 − exports from N-saturated upland forests is suggested as a strategy to improve regional downstream NO3 − pollution, but involves intercontinental-scale action in reducing atmospheric N emissions.. |
| 44. | Yoshitoshi Uehara, Atsushi Kume, Canopy rainfall interception and fog capture by Pinus pumila Regal at Mt. Tateyama in the Northern Japan Alps, Japan, Arctic, Antarctic and Alpine Research, 10.1657/1938-4246-44.1.143, 44, 1, 143-150, 2012.02, [URL], The importance of fog precipitation in the alpine hydrological processes of Pinus pumila canopy was evaluated on Mt. Tateyama, central Japan. We observed rain and fog precipitation, throughfall, and wind direction and velocity at Jodo-daira (36.566°N, 137.606°E, 2840 m a.s.l.) for 3 years. During the snow-free period (August and September), mean monthly rain and fog precipitation was 0.45 mm h–1 and 0.14 mm h–1, respectively. The mean rainfall interception by P. pumila canopy was about 48%, which is higher than that of other forest canopies at lower altitudes. During rainfall, the dense canopy intercepts rain and the water evaporates from the needle surfaces. On the other hand, the canopy captured fog precipitation even in the absence of rainfall. The amount of throughfall increased with increasing fog deposition. Using δ18O and δD analysis, the mean contribution of fog water to the throughfall was estimated at approximately 35%, consistent with the result from direct measurement. These results indicate that P. pumila should have a significant influence on the local hydrological processes of the high mountain ecosystem. The large contribution of fog precipitation can be attributed to the high wind velocity and humidity of the Japan Alps.. |
| 45. | Haruki Nakajima, Atsushi Kume, Megumi Ishida, Tohru Ohmiya, Nobuya Mizoue, Evaluation of estimates of crown condition in forest monitoring: comparison between visual estimation and automated crown image analysis, Annals of Forest Science, 10.1007/s13595-011-0132-9, 68, 8, 1333-1340, 2011.12, [URL], In long-term forest monitoring, tree crown condition has been visually rated to diagnose tree vigor and forest condition. However, visual estimates are subjective. A semiautomatic image analysis system, called CROCO, was developed to estimate crown condition quantitatively. CROCO calculates a DSO value which decrease with increasing crown transparency. • Aims This study aims to verify visual estimates objectively using CROCO and to assess characteristics of visual estimates and DSO values by comparing the effectiveness as indicators of radial growth. • Methods Crown condition of Abies mariesii was visually rated using a vitality index, and DSO values of the same trees were calculated. • Results When the top of the tree was intact, the trees with a higher vitality index showed a significantly higher DSO. Vitality index showed the strongest relationship with DBH increment for 8 years. DSO had a significant relationship with DBH increment by adding information of the crown top condition. • Conclusion Analysis of tree crown images is effective to verify visual estimates. Vitality index is a synthetic index involving factors affecting radial growth. DSO could be utilized similarly to vitality index, as an indicator of radial growth, by addition of information on crown size and/or shape. . |
| 46. | Koichi Watanabe, Hideharu Honoki, Fuminori Endo, Takashi Murakami, Yuki Yoshida, Hajime Iida, Yoshitoshi Uehara, Atsushi Kume , Number concentration and size distribution of ultrafine particles on the roadside of the Tateyama-Kurobe Alpine Route, Japan, Journal of Environmental Science and Health, Part A, 10.1080/10934529.2011.584505, 46, 9, 921-930, 2011.07, [URL]. |
| 47. | 久米篤・渡辺幸一・永淵修・朴木英治, 広域大気汚染の現状と森林生態系への影響 －屋久島と立山の事例－, 日本生態学会誌, 61, 1, 97-106, 2011.03, [URL], アジア大陸からの広域大気汚染は、海を介して大陸に面した離島や山岳地域の大気環境に直接的な影響を及ぼしている。汚染源から放出されたNOxやSO_2は、輸送されている間に硝酸ガスやオゾン(O_3)、あるいは硫酸塩エアロゾル(SO_4^)の等に変化して日本に到達する。O_3濃度やSO_4^を主体とした酸性エアロゾルの負荷量は、大陸からの季節風の強い冬期から春期にかけて高まり、夏期にも風向きによっては一時的な濃度の上昇が観測されている。屋久島における長期観測の結果は、冬期のSO_4^負荷によって土壌や植物体表面からの溶脱が促進されていることを示している。本州・中部山岳地域の立山でも、SO_4^濃度の高い強い酸性霧の発生には、中長距離輸送されてくる汚染物質が影響している。また、弱い黄砂である「バックグラウンド黄砂」の影響も、夏期や秋期に検出されている。大気汚染濃度の日変動について詳細に後方流跡線解析を行った結果、いずれの地点でも大陸からの気団の影響下で汚染濃度は高くなり、広域大気汚染の影響が明らかである。立山ではO_3に加えて100μM以上の高濃度な過酸化水素(H_2O_2)を含んだ酸性霧が度々観測されており、葉の光合成蒸散機能にO_3ストレスと類似した影響を与えている可能性が高い。日本の森林には、大気汚染に対して異なった感受性を持った様々な樹種が生育しているため、大気汚染ストレスに弱い樹種から強い樹種への樹種交代が促進されている可能性が示ある。野外で実際に植物に負荷される大気汚染物質の量は風向きや微地形の影響を強く受け、植物表面では化学的・生理学的反応が活発に進行しているため、現場における環境化学的過程の評価が必要となる。多様な影響を与える広域大気汚染の森林生態系への影響を評価するためには、地球上には人為的な大気汚染影響を受けていない場所は存在しないという前提で、大気環境影響を考慮した植物動態のモニタリングや解析手法を開発していくことが重要であろう。. |
| 48. | Atsushi Kume, Kenlo N Nasahara, Shin Nagai, Hiroyuki Muraoka, The ratio of transmitted near-infrared radiation to photosynthetically active radiation (PAR) increases in proportion to the adsorbed PAR in the canopy, Journal of Plant Research, 10.1007/s10265-010-0346-1, 124, 1, 99-106, 2011.01, [URL]. |
| 49. | 大村嘉人・竹下俊治・久米 篤, 九州大学北海道演習林の地衣類 一地衣類研究会2009年度観察会採集記録一, ライケン, 16, 3, 24-28, 2010.12. |
| 50. | 前田由香, 菱 拓雄, 田代 直明, 馬渕哲也, 井上幸子, 長慶一郎, 山内康平, 緒方健人, 久米 篤, 九州大学北海道演習林のカラマツ人工林及び落葉広葉樹天然林における斜面方位と斜面上の位置の違いによる植生の特徴, 九州大学演習林報告, 91, 1-6, 2010.03, [URL]. |
| 51. | Atsushi Kume, Osamu Nagafuchi, Suguru Akune, Nobutake Nakatani, Masaaki Chiwa, Kenshi Tetsuka, Environmental factors influencing the load of long-range transported air pollutants on Pinus amamiana in Yakushima Island, Japan, Ecological Research, 10.1007/s11284-009-0647-9, 25, 1, 233-243, 2010.01, [URL]. |
| 52. | Atsushi Takashima, Atsushi Kume, Shigejiro Yoshida, Takuhiko Murakami, Tsuyoshi Kajisa, Nobuya Mizoue, Discontinuous DBH-height relationship of Cryptomeria japonica on Yakushima Island -Effect of frequent typhoons on the maximum height-, Ecological Research, 10.1007/s11284-008-0574-1, 24, 5, 1003-1011, 2009.09, [URL]. |
| 53. | Atsushi Kume, Satoshi Numata, Koichi Watanabe, Hideharu Honoki, Haruki Nakajima, Megumi Ishida, Influence of air pollution on the mountain forests along the Tateyama-Kurobe Alpine Route, Ecological Research, 10.1007/s11284-008-0557-2, 27, 4, 821-830, 2009.07, [URL]. |
| 54. | Yoshinori Shinohara, Tomo'omi Kumagai, Kyoichi Otsuki, Atsushi Kume, Naoya Wada, Impact of climate change on runoff from a mid-latitude mountainous catchment in central Japan, Hydrological Processes, 10.1002/hyp.7264, 23, 10, 1418-1429, 2009.05, [URL]. |
| 55. | Atsushi Kume, Bekku Y Sakata, Hanba T Yuko, Nakano Takashi, Kanda Hiroshi, Nitrogen concentration within Saxifraga oppositifolia in different successional stages on a glacier foreland in the High Arctic., Polar Science, 10.1016/j.polar.2008.04.001, 2, 2, 143-147, 2008.06, [URL]. |
| 56. | Hikaru Komatsua, Ayumi Katayama, Shigeki Hirose, Atsushi Kume, Naoko Higashi, Shigeru Ogawa, Kyoichi Otsuki, Reduction in soil water availability and tree transpiration in a forest with pedestrian trampling, Agricultural and Forest Meteorology, 10.1016/j.agrformet.2007.04.014 , 146, 1-2, 107-114, 2007.09, [URL]. |
| 57. | Jun'ichiro Ide, Osamu Nagafuchi, Masaaki Chiwa, Atsushi Kume, Kyoichi Otsuki, Shigeru Ogawa, Effects of discharge level on the load of dissolved and particulate components of stream nitrogen and phosphorus from a small afforested watershed of Japanese cypress (Chamaecyparis obtusa), Journal of Forest Research, 10.1007/s10310-006-0250-7, 12, 1, 45-46, 2007.02, [URL]. |
| 58. | Atsushi Takashima, Atsushi Kume, Shigejiro Yoshida, Methods for estimating understory light conditions using crown projection maps and topographic data, Ecological Research, 10.1007/s11284-006-0151-4, 21, 4, 560-569, 2006.07, [URL]. |
| 59. | Atsushi Kume, Yuko T Hanba, Kaneyuki Nakane, Naoki Sakurai, Hiroshi Sakugawa, Seasonal changes in needle water content and needle ABA concentration of Japanese red pine, Pinus densiflora, in declining forests on Mt. Gokurakuji, Hiroshima prefecture, Japan, Journal of Plant Research, 10.1007/s10265-006-0265-3, 119, 3, 231-238, 2006.05, [URL]. |
| 60. | Atsushi Kume, Kaneyuki Nakane, Hiroshi Sakugawa, Complex environmental factors affecting the decline of Pinus densiflora in the Seto Inland Sea area of western Japan, Journal of Agricultural Meteorology, 60, 6, 1149-1152, 2005.12. |
| 61. | Naoya Wada, Kazunori Watanuki, Kenji Narita, Shizuo Suzuki, Gaku Kudo, Atsushi Kume, Climate change and shoot elongation of alpine dwarf pine (Pinus pumila Regel): Comparisons between six Japanese mountains, Phyton - Annales Rei Botanicae , 45, 4, 253-260, 2005.10, [URL]. |
| 62. | Takayuki Nakatsubo, Yukiko Sakata Bekku, Masaki Uchida, Hiroyuki Muraoka, Atsushi Kume, Toshiyuki Ohtsuka, Takehiro Masuzawa, Hiroshi Kanda, Hiroshi Koizumi, Ecosystem development and carbon cycle on a glacier foreland in the high Arctic, Ny-Ålesund, Svalbard, Journal of Plant Research, 10.1007/s10265-005-0211-9 , 118, 3, 173-179, 2005.06, [URL]. |
| 63. | Toko Suzaki, Atsushi Kume, Yoshio Ino, Effects of slope and canopy trees on light conditions and biomass of dwarf bamboo under a coppice canopy, Journal of Forest Research, 10.1007/s10310-004-0123-x, 10, 2, 151-156, 2005.04, [URL]. |
| 64. | Shigeki Hirose, Atsushi Kume, Shinichi Takeuchi, Yasuhiro Utsumi, Kyoichi Otsuki, Shigeru Ogawa, Stem water transport of Lithocarpus edulis, an evergreen oak with radial-porous wood, Tree Physiology, 10.1093/treephys/25.2.221 , 25, 2, 221-228, 2005.02, [URL]. |
| 65. | Naoya Wada, Kunio Kawada, Ryuichi Kawamura, Kazuma Aoki, Atsushi Kume, Increasing winter runoff due to climatic change in a middle-latitude mountain area of central Japan, Journal of the Meteorological Society of Japan, https://doi.org/10.2151/jmsj.82.1589, 82, 6, 1589-1597, 2004.12, [URL]. |
| 66. | Yoshinobu Sato, Tomo'omi Kumagai, Atsushi Kume, Kyoichi Otsuki, Shigeru Ogawa, Experimental analysis of moisture dynamics of litter layers -the effects of rainfall conditions and leaf shapes-, Hydrological Processes, 10.1002/hyp.5746, 18, 16, 3007-3018, 2004.11, [URL]. |
| 67. | Yukiko Sakata Bekku, Takayuki Nakatsubo, Atsushi Kume, Hiroshi Koisumi, Soil microbial biomass, respiration rate, and temperature dependence on a successional glacier foreland in Ny-Ålesund, Svalbard, Arctic, Antarctic, and Alpine Research, http://dx.doi.org/10.1657/1523-0430(2004)036[0395:SMBRRA]2.0.CO;2, 36, 4, 395-399, 2004.11, [URL]. |
| 68. | Yukiko Sakata Bekku, Atsushi Kume, Takehiro Masuzawa, Hiroshi Kanda, Takayuki Nakatsubo, Hiroshi Koizumi, Soil respiration in a high arctic glacier foreland in Ny-Alesund, Svalbard, Polar Bioscience, 17, 36-46, 2004.02, [URL]. |
| 69. | Nobutake Nakatani, Atsushi Kume, Tsuyoshi Kobayashi, Tsuyoshi Hirakawa, Hiroshi Sakugawa, Needle morphology related to chemical contents in the needles of Japanese Fir (Abies Firma) trees subjected to acidic depositions at Mt. Oyama, Eastern Japan, Water, Air, & Soil Pollution, 10.1023/B:WATE.0000015343.24509.19, 152, 1-4, 97-110, 2004.01, [URL]. |
| 70. | 佐藤嘉展, 久米篤, 大槻恭一,小川 滋, 樹冠構造の違いが樹冠通過雨の分布特性に及ぼす影響—スギ林とマテバシイ林における雨水配分特性の比較—., 水文・水資源学会誌, 16, 6, 605-617, 2003.11. |
| 71. | Toko Suzaki, Atsushi Kume, Yoshio Ino, Evaluation of direct and diffuse radiation densities under forest canopies and validation of the light diffusion effect, Journal of Forest Research, 8: 283-290, 2003.11. |
| 72. | Atsushi Kume, Yukiko S. Bekku, Yuko T. Hanba, Hiroshi Kanda, Carbon isotope discrimination in diverging growth forms of Saxifraga oppositifolia in different successional stages in a High Arctic Glacier Foreland, Arctic, Antarctic and Alpine Research, 10.1657/1523-0430(2003)035[0377:CIDIDG]2.0.CO;2, 35, 3, 377-383, 2003.08. |
| 73. | 久米篤, 植物の分布を分ける生理的制約：進化生態学との接点., 種生物学研究, 26/27, 185-212, 2003.05. |
| 74. | Yukiko Sakata Bekku, Takayuki Nakatsubo, Atsushi Kume, Minako Adachi, Hiroshi Koizumi, Effect of warming on the temperature dependence of soil respiration rate in arctic, temperate and tropical soils., Applied Soil Ecology, 10.1016/S0929-1393(02)00158-0, 22, 3, 205-210, 2003.03, [URL]. |
| 75. | Atsushi Kume, Takami Satomura, Naoko Tsuboi, Masaaki Chiwa, Yuko T. Hanba, Kaneyuki Nakane, Takao Horikoshi, Hiroshi Sakugawa, Effects of understory vegetation on the ecophysiological characteristics of an overstory pine, Pinus densiflora, Forest Ecology and Management, 10.1016/S0378-1127(02)00282-7, 176, 1-3, 195-203, 176, 1-3, 195-203 doi:10.1016/S0378-1127(02)00282-7, 2003.03, [URL]. |
| 76. | 永淵修・阿久根卓・吉村和久・久米篤・海老瀬潜一・手塚賢至, 屋久島西部渓流河川の水質形成に及ぼす酸性降下物の影響, 水環境学会誌, 26: 159-166, 2003.01. |
| 77. | Tsuyoshi Kobayashi, Nobutake Nakatani, Tsuyoshi Hirakawa, Masayo Suzuki, Takayuki Miyake, Masaaki Chiwa, Takae Yuhara, N. Hashimoto, K. Inoue, Y. Yamamura, N Agus, J.R. Sinogaya, Kaneyuki Nakane, Atsushi Kume, Hiroshi Sakugawa, Variation in CO2 assimilation rate induced by simulated dew waters with different sources of hydroxyl radical (·OH) on the needle surfaces of Japanese red pine (Pinus densiflora Sieb. et Zucc.)., Environmental Pollution, 10.1016/S0269-7491(01)00289-5, 118, 3, 383-391, 2002.01, [URL]. |
| 78. | Atsushi Kume, Takemitsu Arakaki, Naoko Tsuboi, Masayo Suzuki, Daiki KUramoto, Kaneyuki Nakane, Hiroshi Sakugawa, Harmful effects of radicals generated in polluted dew on the needles of Japanese Red Pine (Pinus densiflora), New Phytologist, 10.1046/j.0028-646x.2001.00236.x, 152, 1, 53-58, 2001.10, [URL]. |
| 79. | 小林 剛, 中谷暢丈, 鈴木雅代, 三宅隆之, 金 度勲, 平川 剛, 久米 篤, 中根周歩,, アカマツ苗木のガス交換とクロロフィル蛍光の日変化, 日本緑化工学会誌, 26, 4, 343-348, 2001.05. |
| 80. | Atsushi Kume, Naoko Tsuboi, Nobutake Nakatani, Kaneyuki Nakane, Naoki Sakurai, Naoki Nakagawa, Hiroshi Sakugawa, Measurement of ethylene emission from Japanese red pine (Pinus densiflora) under field conditions in NOx-polluted areas, Environmental Pollution, 10.1016/S0269-7491(00)00091-9, 111, 3, 389-394, 2001.01, [URL]. |
| 81. | Atsushi Kume, Yoshio Ino, Why is Aucuba japonica smaller in heavy snowfall areas? A growth simulation of evergreen broad-leaved shrubs based on shoot allometry, critical shoot sizes for flowering and photosynthetic production, Journal of Plant Research, 10.1007/PL00013969, 114, 1113, 67-74, 2001.01, [URL]. |
| 82. | Kume, A., Ino, Y., Differences in shoot size and allometry between two evergreen broad-leaved shrubs, Aucuba japonica varieties in two contrasting snowfall habitat., Journal of Plant Research, 10.1007/PL00013942, 113, 1112, 353-363, 113: 353-363, 2000.01. |
| 83. | Atsushi Kume, Naoko Tsuboi, Takami Satomura, Masayo Suzuki, Masaaki Chiwa, Naoki Sakurai, Takao Horikoshi, Hiroshi Sakugawa, Physiological characteristics of Japanese red pine, Pinus densiflora Sieb. et Zucc., in declined forests at Mt. Gokurakuji in Hiroshima Prefecture, Japan, Trees, 10.1007/PL00009772, 14, 6, 305-311, 2000.01, [URL]. |
| 84. | Yukiko BEKKU, Atsushi Kume, Takayuki Nakatsubo, Takehiro Masuzawa, Hiroshi Kanda, Hiroshi Koizumi, Microbial biomass in relation to primary succession on arctic deglaciated moraines, Polar Bioscience, 12, 47-53, 1999.02, [URL]. |
| 85. | Atsushi Kume, Takayuki Nakatsubo, YUkiko Bekku, Takehiro Masuzawa, Ecological Significance of Different Growth Forms of Purple Saxifrage, Saxifraga oppositifolia L., in the High Arctic, Ny-Ålesund, Svalbard, Arctic, Antarctic, and Alpine Research, 31, 1, 27-33, 1999.02, [URL]. |
| 86. | Atsushi Kume, Chikako Tanaka, Shunichi Matsumoto, Yoshio Ino, Physiological tolerance of Camellia rusticana leaves to heavy snowfall environments: The effects of prolonged snow cover on evergreen leaves, Ecological Research, 10.1046/j.1440-1703.1998.00251.x, 13, 2, 117-124, 1998.07, [URL]. |
| 87. | Takayuki Nakatsubo, Yukiko Bekku, Atsushi Kume, Hiroshi Koizumi, Respiration of the belowground parts of vascular plants: its contribution to total soil respiration on a successional glacier foreland in Ny-Ålesund, Svalbard, Polar Research, 10.1111/j.1751-8369.1998.tb00258.x, 17, 1, 53-60, 1998.06, [URL]. |
| 88. | Akira Shiraishi, Yoshio Ino, Atsushi Kume, Yukira Mochida , Growth and production of Sphagnum mosses from Takadayachi moor in Hakkoda Mountains, Northeast Japan 2. Growth in length measured with a point level method, Ecological Review , 23, 3, 189-199, 1996.09. |
| 89. | Atsushi Kume, Chikako Tanaka, Adaptation of stomatal response of Camellia rusticana to a heavy snowfall environment: Winter drought and net photosynthesis, Ecological Research, 10.1007/BF02347687, 11, 2, 207-216, 1996.08, [URL]. |
| 90. | Satoshi Fukushima, Atsushi Kume, Yoshio Ino, Yukira Mochida, Growth and production of sphagnum mosses from Takadayachi Moor in Hakkoda Mountains Northeast Japan 1. - Dry matter production estimated from photosynthesis and respiration -, Ecological Review , 22, 6, 77-91, 1995.06. |
| 91. | Atsushi Kume, Yoshio Ino, Comparison of ecophysiological responses to heavy snow in two varieties ofAucuba japonica with different areas of distribution , Ecological Research, 10.1007/BF02348523, 8, 2, 111-121, 1993.08, [URL]. |
本データベースの内容を無断転載することを禁止します。