Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Ryuji Ichihashi Last modified date:2020.05.18

Associate Professor / Forest Sciences / Department of Agro-environmental Sciences / Faculty of Agriculture

1. Ryuji Ichihashi, Hikaru Komatsu, Tomonori Kume, Yoshinori Shinohara, Kenji Tsuruta, Kyoichi Otsuki, Effects of thinning on canopy transpiration of a dense Moso bamboo stand in western Japan, Journal of Forest Research, 10.1080/13416979.2019.1647592, 24, 285-291, 2019.09.
2. Ayumi Katayama, Tomonori Kume, Ryuji Ichihashi, Michiko Nakagawa, Vertical variation in wood CO2 efflux is not uniformly related to height
measurement across various species and sizes of Bornean tropical rainforest trees, Tree physiology, 10.1093/treephys/tpz022, 39, 6, 1000-1008, 2019.06, Limited knowledge about vertical variation in wood CO2 efflux (Rwood) is still a cause of uncertainty in Rwood estimates at individual and ecosystem scales. Although previous studies found higher Rwood in the canopy, they examined several tree species of similar size. In contrast, in the present study, we measured vertical variation in Rwood for 18 trees including 13 species, using a canopy crane for a more precise determination of the vertical variation in Rwood, for various species and sizes of trees in order to examine the factors affecting vertical variation in Rwood and thus, to better understand the effect of taking into account the vertical and inter-individual variation on estimates of Rwood at the individual scale. We did not find any clear pattern of vertical variation; Rwood increased significantly with measurement height for only one tree, while it decreased for two more trees, and was not significantly related with measurement height in 15 other trees. Canopy to breast height Rwood ratio was not related to diameter at breast height or crown ratio, which supposedly are factors affecting vertical variation in Rwood. On average, Rwood estimates at individual scale, considering inter-individual variation but ignoring vertical variation, were only 6% higher than estimates considering both forms of variation. However, estimates considering vertical variation, while ignoring inter-individual variation, were 13% higher than estimates considering both forms of variation. These results suggest that individual measurements at breast height are more important for estimating Rwood at the individual scale, and that any error in Rwood estimation at this scale, due to the absence of any more measurements along tree height, is really quite negligible. This study measured various species and sizes of trees, which may be attributed to no clear vertical variation because factors causing vertical variation can differ among species and sizes..
3. Ichihashi R, Kobayashi T, Growth and photosynthesis characteristics of invading larch saplings in an occasionally flooded dry stream bed in cool-temperate Japan., Journal of Forest Research, 10.1080/13416979.2017.1350393, 22, 314-319, 2017.07.
4. Ichihashi R, Chiu CW, Komatsu H, Kume T, Shinohara Y, Tateishi M, Tsuruta K, Otsuki K, Contribution of lianas to community-level canopy transpiration in a warm-temperate forest, Functional Ecology, 10.1111/1365-2435.12881, 31, 1690-1699, 2017.04.
5. Tsuruta K, Okumura M, Kume T, Ichihashi R, Shinohara Y, Kosugi Y, Insignificant effects of culm age on transpiration in a managed Moso bamboo forest, Kyoto, Japan, Hydrological Research Letters, 10, 1-7, 2016.01.
6. Kenji Tsuruta, Motonori Okumura, Tomonori Kume, Ryuji Ichihashi, Yoshinori Shinohara, Yoshiko Kosugi, Insignificant effects of culm age on transpiration in a managed Moso bamboo forest, Kyoto, Japan, Hydrological Research Letters, 10.3178/hrl.10.1, 10, 1, 1-7, 2016.01, The expansion of Moso bamboo forests in Japan might change transpiration and therefore reduce the availability of water resources. Moso bamboo stands are often composed of culms with various ages and older culms may have lower sap flux density (Fd), which may in turn affect individual culm transpiration (Qt), probably because vascular bundles do not regenerate after sprouting. Information related to the differences of Fd and Qt between younger and older culms would be important for (i) understanding the effects of culm age structure changes on stand-scale transpiration (EC), and (ii) developing sampling strategies for EC estimates in Moso bamboo forests. We conducted sap flux measurements for 15 individuals from four culm age classes in a managed Moso bamboo forest in Kameoka, Kyoto, Japan. Differences in Fd were not significant among the four culm age classes with almost the same stem diameter at breast height (DBH). Qt was related to DBH across four age classes, indicating that culm age had no apparent effect on Qt in the forest. Our results suggest the effects of culm age structure changes on EC are small, and contribute to development of sampling strategy without considering culm age structure for EC estimates at this site..
7. Ichihashi R, Komatsu H, Kume T, Onozawa Y, Shinohara Y, Tsuruta K, Otsuki K, Stand-scale transpiration of two Moso bamboo stands with different culm densities, 10.1002/eco.1515, 8, 450-459, 2015.04.
8. Ichihashi R, Tateno M, Biomass allocation and long-term growth patterns of temperate lianas in comparison with trees, New Phytologist, 10.1111/nph.13391, 207, 604-612, 2015.03.
9. Toyama H, Kajisa T, Tagane S, Mase K, Chhang P, Samreth V, Ma V, Sokh H, Ichihashi R, Onoda Y, Mizoue N, Yahara T, Effects of logging and recruitment on community phylogenetic structure in 32 permanent forest plots of Kampong Thom, Cambodia, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 10.1098/rstb.2014.0008, 370, 1662, 2015.02.
10. Komatsu H, Shinohara Y, Kumagai T, Kume T, Tsuruta K, Xiang Y, Ichihashi R, Tateishi M, Shimizu T, Miyazawa Y, Nogata M, Laplace S, Han T, Chiu CW, Ogura A, Saito T, Otsuki K, A model relating transpiration for Japanese cedar and cypress plantations with stand structure, Forest Ecology and Management, 10.1016/j.foreco.2014.08.041, 334, 301-312, 2014.12.
11. Yoshinori Shinohara, Tomonori Kume, Ryuji Ichihashi, Hikaru Komatsu, Kyoichi Otsuki, Moso-bamboo forests in Japan
What are the effects of their area expansion on ecosystem services?, Nihon Ringakkai Shi/Journal of the Japanese Forestry Society, 96, 6, 351-361, 2014.01, Recently, mosobamboo (Phyllostachys pubescens) forests have been expanding in Japan. Some studies have pointed out their expansion could decrease ecosystem services. This paper summarized expansion rates in areas in the last ca. 70 years and biomass of moso-bamboo forests. We verified whether the expansions could increase risks in flood, water shortage, shallow landslide, and soil erosion. Many papers have reported increases in areas of moso-bamboo forests, and the average expansion rate was 1.03 ha/ha year. The rate in the surrounding open spaces tends to be larger than that in the surrounding closed spaces. Aboveground biomass in moso-bamboo forests was between 62.6 and 224.3 t/ha. The maximum aboveground biomass in moso-bamboo forests would be smaller than those in Japanese cedar (Cryptomeria japonica) and Japanese cypress (Chamaecyparis obtusa) forests. However, only a few studies examined belowground biomass in moso-bamboo forests. As well, based on results in previous studies, we concluded that risks in flood, water shortage, shallow landslide, and soil erosion in moso-bamboo forests would not be higher than those in other types of forests. This conclusion is different from the speculation. On the other hand, this conclusion was based on only a few studies. Therefore, further studies are required to clarify various processes related to flood, water shortage, shallow landslide, and soil erosion in moso-bamboo forests with various canopy structures under various meteorological conditions..
12. Toyama H, Tagane S, Chhang P, Kajisa T, Ichihashi R, Samreth V, Ma V, Sokh H, Katayama A, Itadani H, Tateishi M, Tachiki Y, Mas K, Onoda Y, Mizoue N, Tachida H, Yahara T, Inventory of the woody flora in permanent plots of Kampong Thom and Kampong Chhnang Provinces, Cambodia, Acta phytotaxonomica et geobotanica, 64, 45-105, 2013.08.
13. Hironori Toyama, Hiroki Itadani, Makiko Tateishi, Yuuya Tachiki, Keiko Mase, Yusuke Onoda, Nobuya Mizoue, Hidenori Tachida, Tetsukazu Yahara, Shuichiro Tagane, Phourin Chhang, Tsuyoshi Kajisa, Ryuji Ichihashi, Vanna Samreth, Ma Vuthy, Heng Sokh, Ayumi Katayama, Inventory of the Woody Flora in Permanent Plots of Kampong Thom and Kampong Chhnang Provinces, Cambodia, Acta Phytotaxonomica et Geobotanica, 10.18942/apg.KJ00008877422, 64, 2, 45-105, 2013.08, To improve our knowledge of the woody flora of Cambodia, we collected specimens of trees, shrubs and woody vines within and near permanent plots of evergreen and deciduous tropical forests in lowland Cambodia. We sequenced rbcL and matK for most specimens, searched for species having high homologies with those sequences and then identified the collections using taxonomic literature and herbarium specimens. As a result, we identified 325 species in 69 families, including 163 trees, 90 shrubs, 67 vines, four palms and an epiphytic parasite. The frequencies of correct identification of BLAST searched sequences were low at the species level (about 15%), but high at the family and generic levels (about 100% and 75%, respectively). Twenty-one species were new to Cambodia. We corrected many previous misidentifications in the plot records..
14. Miyashita A, Sugiura D, Sawakami K, Ichihashi R, Tani T, Tateno M, Long-term, short-interval measurements of the frequency distributions of the photosynthetically active photon flux density and net assimilation rate of leaves in a cool-temperate forest, AGRICULTURAL AND FOREST METEOROLOGY, 10.1016/j.agrformet.2011.08.001, 152, 1-10, 2012.01.
15. Ichihashi R, Tateno M, Strategies to balance between light acquisition and the risk of falls of four temperate liana species: to overtop host canopies or not?, JOURNAL OF ECOLOGY, 10.1111/j.1365-2745.2011.01808.x, 99, 4, 1071-1080, 2011.07.
16. Ichihashi R, Nagashima H, Tateno M, Biomass allocation between extension- and leaf display-oriented shoots in relation to habitat differentiation among five deciduous liana species in a Japanese cool-temperate forest, PLANT ECOLOGY, 10.1007/s11258-010-9783-0, 211, 1, 181-190, 2010.11.
17. Ichihashi R, Nagashima H, Tateno M, Morphological differentiation of current-year shoots of deciduous and evergreen lianas in temperate forests in Japan, ECOLOGICAL RESEARCH, 10.1007/s11284-008-0512-2, 24, 2, 393-403, 2009.03.
18. Yoshida S, Ichihashi R, Toh-e A, Ras recruits mitotic exit regulator Lte1 to the bud cortex in budding yeast, JOURNAL OF CELL BIOLOGY, 10.1083/jcb.200301128, 161, 5, 889-897, 2003.06.