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査読付きの学術論文

（国際誌）

1. Okada, K., Yokoyama, D., Aiba, S., Kitayama K. (2024) Exploration capacity versus specific enzymatic activity of ectomycorrhizas in response to primary productivity and soil phosphorus availability in Bornean tropical rainforests. Scientific Reports 14, 2842.https://doi.org/10.1038/s41598-024-53234-6

2. Naka, M., Masumoto, S., Nishizawa, K. Matsuoka, S., Tatsumi, S.,  Kobayashi, Y., Suzuki, S.F., Xu, X., Kawakami, T., Katayama, N., Makoto, K., Okada, K., Uchida, M., Takagi, K. & Mori, A.S. (2024)Long-term Consequences on Soil Fungal Community Structure: Monoculture Planting and Natural Regeneration. Environmental Management 73, 777–787.  https://doi.org/10.1007/s00267-023-01917-7

3. Amy E. Zanne; Habacuc Flores-Moreno; Jeff R. Powell; William K. Cornwell; James W. Dalling; Amy T. Austin; Aimée T. Classen; Paul Eggleton; Kei-ichi Okada; Catherine L. Parr et al. (2022) Termite sensitivity to temperature affects global wood decay rates. Science, 377(6613), 1440-1444.  https://www.science.org/doi/10.1126/science.abo3856

4. Akira S. Mori, Laura E. Dee, Andrew Gonzalez, Haruka Ohashi, Jane Cowles, Alexandra J. Wright, Michel Loreau, Yann Hautier, Tim Newbold, Peter B. Reich, Tetsuya Matsui, Wataru Takeuchi, Kei-ichi Okada, Rupert Seidl & Forest Isbell (2021) Biodiversity–productivity relationships are key to nature-based climate solutions. Nat. Clim. Chang. 11, 543–550. https://doi.org/10.1038/s41558-021-01062-1

5. Akira S. Mori, J. Hans C. Cornelissen, Saori Fujii, Kei-ichi Okada & Forest Isbell (2020) A meta-analysis on decomposition quantifies afterlife effects of plant diversity as a global change driver. Nat Commun 11, 4547. https://doi.org/10.1038/s41467-020-18296-w

6. Yuta Kobayashi, Kei-ichi Okada, Akira S Mori (2019) Reconsidering biodiversity hotspots based on the rate of historical land-use change. Biological Conservation, 233, 268-275. https://doi.org/10.1016/j.biocon.2019.02.032

7. Hidemi Nagano, Keiichi Okada, Yoshihiro Nakashima, Hiromitsu Samejima, Jamili Nais, Kenehiro Kitayama (2019) Habitat use of Bornean Ferret Badger Melogale everetti in Sabah, Malaysian Borneo. Small Carnivore Conservation, 57: 25-33.

8. Shogoro Fujiki, Shogo Nishio, Kei-ichi Okada, Jamili Nais, Rimi Repin, Kanehiro Kitayama Estimation of the Spatiotemporal Patterns of Vegetation and Associated Ecosystem Services in a Bornean Montane Zone Using Three Shifting-Cultivation Scenarios. Land (2018) 7:29 https://doi.org/10.3390/land7010029

9. Tomonori Tsunoda, Buntaro Kusumoto, Kei-ichi Okada, Yuko Aoshima, Atsushi KumeThe 30th anniversary of Ecological Research: past, present, and future. Ecological Research (2017) 32: 451-457 https://doi.org/10.1007/s11284-017-1457-0

10. Kei-ichi Okada, Shin-ichiro Aiba, Kanehiro Kitayama,  Influence of temperature and soil nitrogen and phosphorus availabilities on fine-root productivity in tropical rainforests on Mount Kinabalu, Borneo. Ecol Res (2017) 32: 145–156 doi:10.1007/s11284-016-1425-0

11. Shogoro Fujiki, Shogo Nishio, Kei-ichi Okada, Jamili Nais and Kanehiro Kitayama. Plant communities and ecosystem processes in a succession-altitude matrix after shifting cultivation in the tropical montane forest zone of northern Borneo. J Trop Ecol (2017) 33: 33-49 http://dx.doi.org/10.1016/j.isprsjprs.2016.06.008

12. Shogoro Fujiki, Kei-ichi Okada, Shogo Nishio, Kanehiro Kitayama. Estimation of the stand ages of tropical secondary forests after shifting cultivation based on the combination of WorldView-2 and time-series Landsat images. ISPRS Journal of Photogrammetry and Remote Sensing 119: 280-293 http://dx.doi.org/10.1016/j.isprsjprs.2016.06.008

13. Keiichi Okada, Sachiko Okada, Koh Yasue, Masaki Fukuda, Akiyoshi Yamada Six-year monitoring of pine ectomycorrhizal biomass under a temperate monsoon climate indicates significant annual fluctuations in relation to climatic factors. Ecological Research 26:411-419 DOI: 10.1007/s11284-011-0800-0

14. Keiichi Okada, Takami Satomura, Akihiko Kinoshita, Takao Horikoshi, Koh Yasue, Masaki Fukuda, Akiyoshi Yamada (2011)  Difference of pine ectomycorrhizal biomass in relation to forest conditions. Mycoscience 52:59-64 DOI: 10.1007/s10267-010-0069-0 

15. Wanwisa Fangfuk, Keiichi Okada, Ratchanee Petchang, Chaiwat To-anun, Masaki Fukuda, Akiyoshi Yamada (2010) Invitro mycorrhization of edible Astraeus mushrooms and their morphological characterization Mycoscience, 51:234-241  DOI 10.1007/s10267-009-0031-1 

（国内誌）

1. 山田明義・山縣夏紀・河村史紀・岡田慶一・細谷剛・出川洋介・福田正樹 （2006） 宿主植物実生の植え付けによる森林土壌からの外生菌根の検出 日本菌学会報，47巻25－32 

査読無しの学術論文

（国内誌）

1. 岡田慶一・福永健司・橘隆一（2005）緑化法面における菌根形成率とその要因 日本緑化工学会誌，31巻1号171－174 

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​著書

1. 岡田慶一（分担）（2021）「熱帯山地林」および「母岩・土壌と植生分布」の項，２章　森林の分布と構造・動態，日本森林学会編．森林学の百科事典．丸善出版．pp28-29, 46-47, 2021年1月