Kyushu University Academic Staff Educational and Research Activities Database
List of Reports
Tsutomu Enoki Last modified date:2021.10.26

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


Reports
1. Soil fauna effects on early-stage litter decomposition in Moso bamboo stands: a comparison among organs.
2. Effects of genotype and phenotypic plasticity on growth of 45-year-old clone Cryptomeria japonica in common gardens

[in Japanese]

.
3. Effects of micro-topography on altitudinal patterns of tree species diversity in a mountainous forest of central Kyushu.
4. Prediction of desiccation sensitivity in seeds of woody species using seed traits..
5. Carbon and nitrogen dynamics in an abandoned bamboo forest along a steep slope.
6. Effects of thinning on the aboveground net primary production of old Cryptomeria japonica plantation-comparison between stands with different thinning intensity..
7. Model Forests in Kasuya Research Forest(2)
The ninth Kasuya Research Forest Management Plan (2015-2024) designated the model forests with characteristic standstructure and species composition in the Research Forest. We surveyed the stands of Cinnamomum camphola model forest, foreignCupressaceae species model forest, Chamaecyparis obtusa model forest, and Takada foreign tree species model forest. In themonitoring plot (400m2) of the C. camphola model forest, 91% of the basal area was composed by C. camphola. The mean diameter atbreast height (DBH) of 37 C. camphola trees was 42.0cm. There was no C. camphola sapling in the plot. In the foreign Cupressaceaespecies model forest, 18 Cunninghamia lanceolate trees and 7 Cunninghamia konishii trees survived. The mean DBHs and meanheights of the two species were 33.4 cm and 32.0 cm, and 19.7m and 20.6m, respectively. In the Chamaecyparis obtusa model forest,the tree density, basal area, mean DBH and mean height were 425 tree / ha, 64.2m2/ha, 43.7cm and 25.6m, respectively. In the Takadaforeign tree species model forest, there were 75 species of 2955 trees larger than 15cm in girth at breast height. These values are lessthan one seventh for species number and less than one half for the tree number comparing with those in 1935 when the model forestwas established..
8. Frequency of discontinuous growth in evergreen and deciduous hardwood species in a warm temperate forest

[in Japanese]

.
9. Growth and tree form of 6 Cryptomeria japonica culitivars: Comparison among 5 University Forests in Kyushu and Shikoku

[in Japanese]

.
10. 竹林とスギ林における斜面位置による窒素蓄積様式の違い.
11. Differences in growth and nitrogen use among 5 Cryptomeria japonica D. don cultivars in Kyushu

[in Japanese]

.
12. Difference in the relationship between soil N availability and productivity ~Effect of species turnover on root growth

[in Japanese]

.
13. 森林流域内における地形の違いがヒノキ葉の窒素・リンのストイキオメトリーに与える影響.
14. Effect of increased sika deer density on long-term stand dynamics of Abies and Tsuga forest in Kyushu Mountains
[in Japanese].
15. 日本の森林土壌における窒素無機化・硝化速度の制限要因.
16. 榎木 勉, ほか, Progress in the 21st century: a roadmap for the Ecological Society of Japan, Ecological Research, 2014.03.
17. Soil movement on forest slope after decline of understory vegetation
[in Japanese].
18. Growth and wood properites of Japanese larch grown in Shiiba Research Forest, Kyushu University
[in Japanese].
19. Effects of different thinning intensities on the ANPP of old Cryptomeria japonica plantation
[in Japanese].
20. Urakawa Rieko, Ohte Nobuhito, Shibata Hideaki, Isobe Kazuo, Oda Tomoki, Watanabe Tsunehiro, Fukuzawa Karibu, Ugawa Shin, Hishi Takuo, Enoki Tsutomu, Tateno Ryunosuke, Fukushima Keitaro, Nakanishi Asami, Saigusa Nobuko, Yamao Yukio, Oyanagi Nobuhiro, Hattori Daichi, Nakata Makoto, Tanaka Kenta, Toda Hiroto, Inagaki Yoshiyuki, Hirai Keizo, Characteristics of Nitrogen Mineralization Rates and Controlling Factors in Forest Soils in the Japanese Archipelago, AGU(American Geophysical Union) Fall Meeting, 2013.12.
21. Relieving effects of sika deer culling on damage of planted seedling.
22. Validity of culling techniques for management of overabundant sika deer.
23. Nitrogen mineralization rates in forest soils in Japanese archipelago - Soil chemical properties -.
24. Aboveground Net Primary Production of a 140-year-old Cryptomeria japonica plantation: Comparison with an un successful plantation dominated by naturally regenerated broadleaf trees.
25. Accumulation patterns of soil carbon and nitrogen in a Quercus crispula plantation in eastern Hokkaido: Comparison among 0-40 years old stands.
26. Effects of freeze-thaw cycles by winter climate change on soil nitrogen dynamics in ten temperate forest ecosystems throughout Japanese archipelago.
27. Potential effect on aerosol formation by diterpene emissions from dominant coniferous trees (Cryptomeria japonica and Chamaecyparis obtusa) in Japan
Recent decades, many efforts have been made to investigate biogenic volatile organic compounds (BVOCs) due to their significant impact on atmospheric chemistry and physics. On the other hand, atmospheric modeling studies have suggested that there is likely to be significant amount of unknown reactive organic compounds in the atmosphere. In this study, we focused on high molecular weight BVOC such as BVOC larger than C15 emitted from the most and 2nd dominant coniferous trees in Japan and have conducted field campaigns at two different sites. As a result, significant emissions of diterpenes have been discovered. I would like to present about the significant emission of the diterpenes and their potential impact on atmospheric chemistry and aerosol formation..
28. Effects of changes in snow accumulation due to climate change on nutrient cycling function of forest soil:Basic information on chemical characteristics of soil in the ten forested sites.
29. Effects of topography and planted tree on the aboveground primary production of an unsuccessful plantation.
30. Fire disturbance and regeneration processes of a conifer forest in Newfoundland.
31. Do naturally regenerated broad-leaved trees affect the above-ground production of a Hinoki cypress plantation ?:topographic variation in a small watershed.
32. Effects of shika deer exclosure fence on soil properties on a slope ten years after clear cutting:Micro topographic variation.
33. Litterfall rate and litter accumulation in a tropical seasonal evergreen forest of Thailand.
34. Topographic variation in stand structure of a cool temperate secondary forest.
35. Distribution of deer pellets in a cool-temperate forest:Differences with vegetation and topography.
36. Effects of disturbances on spatial patterns of Shorea parvistipulata saplings in a tropical rain forest of Sarawak.
37. Effects of clearcut on the seedling in a mangrove on Oahu Island.
38. A mechanism to sustain diversity of oribatid mites by soil ecosystem engineer,, Metaphire yambaruensis.
ヤンバルオオフトミミズによって作り出された地表面の微小生息場所に生息する小型節足動物群集,特にササラダニの群集構造を比較した.ヤンバルオオフトミミズは沖縄本島北部にのみ生息し,日本で初めて見つかった土壌穿孔表層採餌種(anecic)である.本種は地下約20cmに横走する坑道に住み,落葉を土壌表面の入口に集めた上で摂食し,土壌と混じった糞を出口に排泄する.糞塊は20cmほどの塔状になる.集められた落葉はmiddenと呼ばれている.照葉樹林は秋に一度に落葉が集中するのではなく,春と秋を中心に長い時間にわたって落葉が供給される.沖縄では気温が高いため,落葉の分解速度は高い.ミミズにとっては落葉を他の分解者に利用されないように自分の生息場所であるmiddenに集めていると考えられる.坑道やmiddenではミミズから供給される可溶性炭素や窒素が栄養源となって微生物の活性が高く,微生物バイオマスも多いと考えた. リターの堆積量は糞塊の周囲で最も多く,middenとミミズの影響のない土壌では差がなかった.ササラダニの個体数密度はリター層ではミミズの影響のない土壌できわめて少なく,middenと糞塊でほぼ同じ程度であった.一方,土壌層ではミミズの影響のない土壌で最も少なく,糞塊よりもmiddenでの密度が高かった.ササラダニの種数はミミズの影響のない土壌と糞塊で差がなかったが,middenではこれらの倍近い値を示した.これらのことからヤンバルオオフトミミズは落葉資源を移動させ,土壌と混合することによって地表面の微小生息場所の多様性を高め,ササラダニの密度と多様性を大きく高めており,生態系改変者として土壌生物群集に大きな影響を与えていた..
39. Distribution pattern of three mangrove species along the Nakara river in Iriomote Island, Okinawa.
40. Effect of light environment and tree size on crown form in a sub-tropical evergreen broad-leaved forest.
41. Effect of typhoon disturbance on nutrient cycling in a subtropical forest in Okinawa
Typhoon is frequent in Okinawa, and is the most important natural disturbance affecting the forest. The effects of typhoon disturbance on fine litterfall, litter decomposition, and precipitation partitioning were studied in a subtropical evergreen broad-leaved forest on Okinawa Island over 5 years. Mean annual fine litterfall and bulk precipitation were 7.56 Mg/ha and 3324 mm, respectively. Mean nutrient inputs (kg/ha) resulting from typhoon activities were, respectively, 29.5 for N, 1.86 for P, 26.9 for K, 37.3 for Ca, and 12.5 for Mg. These values covered about 27 %~37 % of the annual total for the relevant elements. Litterfall resulting from typhoon decomposed more rapidly than the normal litter. The results from the study demonstrate that typhoon has a strong effect on nutrient cycling in the forest ecosystem in Okinawa..
42. Research and trial for conservation and regeneration of ecosystem in islands..
43. Change in substance dynamic behavior along forest slope. Substance circulation in Japanese black pine erosion control forest, Mt. Tagami. Difference between nourishment utilization efficiency according to landform. ( Ministry of Education S ).