Details of the Researcher

PHOTO

Yu Fukasawa
Section
Graduate School of Agricultural Science
Job title
Associate Professor
Degree

  • 博士（農学）（京都大学）

  • 修士（農学）（京都大学）

Research History 5

  • 2023/10 - Present
    Graduate School of Agricultural Science　Laboratory of Forest Ecology　Associate Professor

  • 2021/07 - 2024/06
    Prominent Research Fellow, Tohoku University

  • 2023/04 - 2023/10
    Graduate School of Agricultural Science, Tohoku University　Laboratory of Forest Ecology　Assistant Professor

  • 2010/07 - 2023/03
    Graduate School of Agricultural Science, Tohoku Univeristy　Forest Ecology　Assistant Professor

  • 2017/04 - 2019/03
    Cardiff University　School of Bioscience　Visiting Scientist

Committee Memberships 12

  • Mycological Society of Japan　Board of Trustee

    2025/04 - Present

  • Journal of Fungi　Guest Editor

    2021/10 - Present

  • Forests　Guest Editor

    2021/05 - Present

  • Tohoku branch of Ecological Society of Japan　Local committee member

    2021/04 - Present

  • Mycological Society of Japan　Councilor

    2021/04 - Present

  • Frontiers in Microbiology　Guest Editor

    2020/04 - Present

  • British Mycological Society　Editorial board

    2017/10 - Present

  • 日本菌学会　英文紙編集委員

    2013/04 - Present

  • 日本森林学会　和文誌編集委員

    2012/04 - 2017/03

  • 日本生態学会東北地区会　庶務幹事

    2012/09 - 2014/03

  • 日本森林学会　和文紙編集主事

    2012/04 - 2014/03

  • 日本菌学会　ニュースレター編集委員

    2011/04 - 2013/03

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Professional Memberships 6

  • The Japanese Society of Myxomycetology

  • The Japanese Forestry Society

  • The Mycological Society of Japan

  • The Ecological Society of Japan

  • The British Ecologica Society

  • The British Mycological Society

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Research Interests 13

  • behavioral ecology of fungi

  • biogeography

  • climate change

  • forest dieback

  • oak wilt disease

  • pine wilt disease

  • decomposition

  • microbial intelligence

  • biodiversity

  • biotic interactions

  • forest ecosystem

  • deadwood

  • Fungal community

Research Areas 1

  • Life sciences / Ecology and environmental science /

Awards 10

  1. Kuromatsunai Biodiversity Conservation Research Grant

    2024/06　Kuromatsunai Biodiversity Conservation Research Grant Committee

  2. Outstanding presentation award

    2024/05　Mycological Society of Japan

  3. Prominent Research Fellow

    2021/07　Tohoku University

  4. Oral presentation award

    2020/02　Society for Young researchers on Neuroscience Tohoku Branch

  5. Miyadi Award

    2019/03　Ecological Society of Japan

  6. Keisuke-Tsubaki IMA Medal

    2018/07　International Mycological Association

  7. 第64回日本生態学会ポスター発表最優秀賞

    2017/03/15　日本生態学会

  8. 日本菌学会奨励賞

    2015/05/16　日本菌学会

  9. 日本森林学会奨励賞

    2015/03/17　日本森林学会

  10. 最優秀賞

    2014/12/14　日本生態学会東北地区会　口頭発表

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Papers 89

  1. The emergence of fungal ethology as a distinctive discipline in mycology International-journal International-coauthorship Peer-reviewed

    Yu Fukasawa, Kristin Aleklett Kadish

    Fungal Ecology　2025/04

  2. Carbon allocation shifts during fungal mycelial competition under the heat stress Peer-reviewed

    Yu Fukasawa, Satsuki Kimura

    Fungal Ecology　76　101435-101435　2025/04

  3. Geographical Gradient of Fungal Decay Type in Norway Spruce Logs in Europe and Its Impact on Seedling Establishment International-journal International-coauthorship Peer-reviewed

    Yu Fukasawa, Olga Orman, Václav Pouska, Radek Bače, Momchil Panayotov, Nickolay Tsvetanov, Lucie Zíbarová, Jenni Nordén, Yuki Kawasaki, Martin Mikoláš, Elias Polemis, Kamil Král, Tomáš, řívětiv, Miroslav Svoboda

    Journal of Biogeography　e15135-e15135　2025/04

  4. Behavioral ecology of non-neural organisms: basics and applications Peer-reviewed

    Yu Fukasawa

    JAPANESE JOURNAL OF ECOLOGY　74　(2)　193-194　2025

    Publisher:

    DOI： 10.18960/seitai.74.2_193 　

  5. The behavior of fungal mycelia Peer-reviewed

    Yu Fukasawa

    JAPANESE JOURNAL OF ECOLOGY　74　(2)　215-227　2025

    DOI： 10.18960/seitai.74.2_215 　

  6. Oak Wilt Disease May Reduce the Initial Decay Rate of Dead Quercus serrata Stems by Altering Fungal Communities in the Wood International-journal Peer-reviewed

    Yu Fukasawa, Satsuki Kimura, Yuji Kominami, Masahiro Takagi, Kimiyo Matsukura, Kobayashi Makoto, Satoshi N. Suzuki, Shuhei Takemoto, Nobuaki Tanaka, Mayuko Jomura, Kohmei Kadowaki, Masayuki Ushio, Haruo Kinuura, Satoshi Yamashita

    Environmental Microbiology　27　(1)　e70026-e70026　2025/01

    DOI： 10.1111/1462-2920.70026 　

  7. Spatial resource arrangement influences both network structures and activity of fungal mycelia: A form of pattern recognition? Peer-reviewed

    Yu Fukasawa, Kosuke Hamano, Koji Kaga, Daisuke Akai, Takayuki Takehi

    Fungal Ecology　72　101387-101387　2024/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.funeco.2024.101387 　

    ISSN： 1754-5048

  8. Electrical integrity and week-long oscillation in fungal mycelia International-journal Peer-reviewed

    Yu Fukasawa, Daisuke Akai, Takayuki Takehi, Yutaka Osada

    Scientific Reports　14　15601　2024/07

    Publisher: Springer Nature

    DOI： 10.1038/s41598-024-66223-6 　

  9. Hyphal connection increases net resource utilization of saprotrophic fungal mycelia by improving local performance: A case study of the cord-forming basidiomycete, Phanerochaete velutina Peer-reviewed

    Yu Fukasawa, Koji Kaga, Daisuke Akai, Takayuki Takehi

    Fungal Ecology　71　101362　2024/06

    DOI： 10.1016/j.funeco.2024.101362 　

  10. Factors associated with seedling establishment on logs of different fungal decay types—A seed-sowing experiment Peer-reviewed

    Yu Fukasawa, Hiroyuki Kitabatake

    Ecology and Evolution　14　e11508　2024/06

    DOI： 10.1002/ece3.11508 　

  11. Bark beetle outbreaks in Picea abies stands are associated with changes in wood-inhabiting fungal communities and seedling establishment on logs Peer-reviewed

    Yu Fukasawa, Václav Pouska, Radek Bače, Lucie Zíbarová, Yuki Kawasaki, Shunsuke Matsuoka, Hirotoshi Sato, Olga Orman, Kamil Král, Miroslav Svoboda

    Fungal Ecology　68　101328-101328　2024/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.funeco.2023.101328 　

    ISSN： 1754-5048

  12. Ecological aspects of myxomycetes associated with white and brown wood rot on coarse woody debris in subalpine coniferous forests in Central Japan Peer-reviewed

    Kazunari Takahashi, Yuichi Harakon, Yu Fukasawa

    Mycoscience　65　86-91　2024/03

    DOI： 10.47371/mycosci.2024.1.003 　

  13. Foraging strategies of fungal mycelial networks: responses to quantity and distance of new resources Peer-reviewed

    Yu Fukasawa, Kaho Ishii

    Frontiers in Cell and Developmental Biology　24　2023/08/24

    DOI： 10.3389/fcell.2023.1244673 　

  14. Electrical potentials in the ectomycorrhizal fungus Laccaria bicolor after a rainfall event Peer-reviewed

    Yu Fukasawa, Daisuke Akai, Masayuki Ushio, Takayuki Takehi

    Fungal Ecology　63　101229　2023/02

  15. Local calcium signal transmission in mycelial network exhibits decentralized stress responses Peer-reviewed

    Ayaka Itani, Shunsuke Masuo, Riho Yamamoto, Tomoko Serizawa, Yu Fukasawa, Naoki Takaya, Masatsugu Toyota, Shigeyuki Betsuyaku, Norio Takeshita

    PNAS Nexus　2　(3)　1-10　2023/02

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/pnasnexus/pgad012 　

    eISSN： 2752-6542

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    Abstract Many fungi live as mycelia, which are networks of hyphae. Mycelial networks are suited for the widespread distribution of nutrients and water. The logistical capabilities are critical for the extension of fungal survival areas, nutrient cycling in ecosystems, mycorrhizal symbioses, and virulence. In addition, signal transduction in mycelial networks is predicted to be vital for mycelial function and robustness. A lot of cell biological studies have elucidated protein and membrane trafficking and signal transduction in fungal hyphae; however, there are no reports visualizing signal transduction in mycelia. This paper, by using the fluorescent Ca2+ biosensor, visualized for the first time how calcium signaling is conducted inside the mycelial network in response to localized stimuli in the model fungus Aspergillus nidulans. The wavy propagation of the calcium signal inside the mycelium or the signal blinking in the hyphae varies depending on the type of stress and proximity to the stress. The signals, however, only extended around 1,500 μm, suggesting that the mycelium has a localized response. The mycelium showed growth delay only in the stressed areas. Local stress caused arrest and resumption of mycelial growth through reorganization of the actin cytoskeleton and membrane trafficking. To elucidate the downstream of calcium signaling, calmodulin, and calmodulin-dependent protein kinases, the principal intracellular Ca2+ receptors were immunoprecipitated and their downstream targets were identified by mass spectrometry analyses. Our data provide evidence that the mycelial network, which lacks a brain or nervous system, exhibits decentralized response through locally activated calcium signaling in response to local stress.

  16. Does Coexistence of Diverse Fungi Retard Wood Decomposition?: Fungal Diversity‒decomposition Relationship Invited Peer-reviewed

    Yu Fukasawa

    Kagaku to Seibutsu　60　(7)　319-326　2022/07

  17. Which is the best substrate to regenerate? a comparative pot experiment for tree seedling growth on decayed wood and soil Peer-reviewed

    Yu Fukasawa, Hiroyuki Kitabatake

    Forests　2022/06

  18. Low temperature enhances the ability of the termite-egg-mimicking fungus Athelia termitophila to compete against wood-decaying fungi Peer-reviewed

    Yasuyuki Komagata, Yu Fukasawa, Kenji Matsuura

    Fungal Ecology　60　101178-101178　2022/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.funeco.2022.101178 　

    ISSN： 1754-5048

  19. Surface Area ofWood Influences the Effects of Fungal Interspecific Interaction on Wood Decomposition—A Case Study Based on Pinus densiflora and Selected White Rot Fungi International-journal Peer-reviewed

    Yu Fukasawa, Koji Kaga

    Journal of Fungi　8　in press　2022/05

    DOI： 10.3390/jof8050517 　

    More details Close

    IF = 5.816

  20. Editorial: Fungal Genetics in Plant Biomass Conversion Invited Peer-reviewed

    Jiwei Zhang, Guodong Liu, Yu Fukasawa

    Frontiers in Microbiology　13　Article 875768　2022/03

    DOI： 10.3389/fmicb.2022.875768 　

    More details Close

    IF = 5.640

  21. Associations between corticolous myxomycetes and tree vitality in Cryptomeria japonica Peer-reviewed

    Kazunari Takahashi, Yu Fukasawa

    Mycoscience　63　(2)　45-52　2022/01

    DOI： 10.47371/mycosci.2022.01.001 　

  22. Invertebrate assemblages on Biscogniauxia sporocarps on oak dead wood: an observation aided by squirrels Invited Peer-reviewed

    Yu Fukasawa

    Forests　12　2021/08

  23. Ecological impacts of fungal wood decay types: a review of current knowledge and future research directions Invited Peer-reviewed

    Yu Fukasawa

    Ecological Research　36　910-931　2021/08

  24. Timing of resource addition affects the migration behavior of wood decomposer fungal mycelia Peer-reviewed

    Yu Fukasawa, Koji Kaga

    Journal of Fungi　7　2021/08

  25. Patterns of community composition and diversity in latent fungi of living Quercus serrata trunks across a range of oak wilt prevalence and climate variables in Japan Peer-reviewed

    Yu Fukasawa, Kimiyo Matsukura, Jörg G. Stephan, Kobayashi Makoto, Satoshi N Suzuki, Yuji Kominami, Masahiro Takagi, Nobuaki Tanaka, Shuhei Takemoto, Haruo Kinuura, Kunihiro Okano, Zewei Song, Mayuko Jomura, Kohmei Kadowaki, Satoshi Yamashita, Masayuki Ushio

    Fungal Ecology　101095-101095　2021/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.funeco.2021.101095 　

    ISSN： 1754-5048

  26. Relative importance of climate, vegetation, and spatial factors in the community and functional composition of wood-inhabiting fungi in discontinuously distributed subalpine spruce forests Peer-reviewed

    Yu Fukasawa, Kimiyo Matsukura, Yoko Ando, Satoshi N. Suzuki, Kunihiro Okano, Zewei Song, Mineaki Aizawa, Daisuke Sakuma

    Canadian Journal of Forest Research　51　1-10　2021/06

    Publisher: Canadian Science Publishing

    DOI： 10.1139/cjfr-2020-0344 　

    ISSN： 0045-5067

    eISSN： 1208-6037

    More details Close

    Wood-inhabiting fungi are critically important for the decomposition of coarse woody debris (CWD). To evaluate the relative importance of climate, vegetation, and spatial factors in the functional composition of fungal communities that inhabit CWD in discontinuously distributed subalpine Hondo spruce (Picea jezoensis (Sieb. & Zucc.) Carr. var. hondoensis (Mayr) Rehder) forests, a metabarcoding analysis was conducted on spruce deadwood samples obtained from six subalpine forests in central Japan using a high-throughput DNA sequencing technique. We detected 454 fungal operational taxonomic units (OTUs) from 67 spruce CWDs and determined that spatial factors explained a larger fraction of community variation than environmental (climate and vegetation) factors at all six study sites. However, environmental factors explained a larger fraction than spatial factors if we excluded data from one site that is geographically distant from other study sites. The OTU number and the occurrence of brown-rot fungi were positively associated with mean annual temperature and negatively associated with mean annual precipitation. Similarly, the principal component of forest vegetation significantly affected the OTU number and occurrence of brown-rot fungi. Precipitation seasonality was positively associated with the OTU number of undefined saprotrophs. These results suggest that fungal OTUs belonging to different functional groups respond differently to environmental variables.

  27. Decay stages of wood and associated fungal communities characterise diversity–decomposition relationships Peer-reviewed

    Yu Fukasawa, Kimiyo Matsukura

    Scientific Reports　11　8972　2021/04

  28. Effects of wood resource size and decomposition on hyphal outgrowth of a cord-forming basidiomycete, Phanerochaete velutina Peer-reviewed

    Yu Fukasawa, Koji Kaga

    Scientific Reports　10　21936　2020/12

  29. Ecological memory and relocation decisions in fungal mycelial networks: responses to quantity and location of new resources Peer-reviewed

    Yu Fukasawa, Melanie Savoury, Lynne Boddy

    The ISME Journal　14　380-388　2020/10

  30. 菌類の菌糸体ネットワークに見られる知能 Invited Peer-reviewed

    深澤遊

    B&I（バイオサイエンスとインダストリー）　406-407　2020/08

  31. How does wood-inhabiting fungal community affect forest recovery after deforestation events in subalpine coniferous forest? Invited Peer-reviewed

    Yu Fukasawa

    Journal of Integrated Field Science　17　12-14　2020/07

  32. Inoculum volume effects on competitive outcome and wood decay rate of brown- and white-rot basidiomycetes Peer-reviewed

    Yu Fukasawa, Emma C Gilmartin, Melanie Savoury, Lynne Boddy

    Fungal Ecology　2020/03

  33. Successful seedling establishment of arbuscular mycorrhizal- compared to ectomycorrhizal-associated hardwoods in arbuscular cedar plantations Peer-reviewed

    1. Yuki Negishi, Yukino Eto, Masahiro Hishita, Kazuhiko Masaka, Yu Fukasawa, Kimiyo Matsukura, Masanori Suzuki, Kenji Seiwa*

    Forest Ecology and Management　468　2020

    DOI： 10.1016/j.foreco.2020.118155 　

    ISSN： 0378-1127

    eISSN： 1872-7042

  34. Climate influences the effect of fungal decay type on regeneration of Picea jezoensis var. hondoensis seedlings on decaying logs Peer-reviewed

    Yu Fukasawa, Yoko Ando, Satoshi Suzuki, Muneaki Aizawa, Daisuke Sakuma

    Canadian Journal of Forest Research　50　73-79　2020

  35. Gap creation alters the mode of conspecific distance-dependent seedling establishment via changes in the relative influence of pathogens and mycorrhizae Peer-reviewed

    Wulantuya, Masaka K, Bayandala, Fukasawa Y, Matsukura K, Seiwa K

    Oecologia　2020

  36. Beetles as potential dispersers of slime mold spores Invited

    Shinji Sugiura, Yu Fukasawa, Ryo Ogawa, Shin-ichi Kawakami, Kazuo Yamazaki

    Bulletin of the Ecological Society of America　100　(3)　e01564-e01564　2019/07

    DOI： 10.1002/bes2.1564 　

  37. Effects of forest dieback on wood decay, saproxylic communities, and spruce seedling regeneration on coarse woody debris Peer-reviewed

    Yu Fukasawa, Yoko Ando, Yoshitaka Oishi, Kimiyo Matsukura, Kunihiro Okano, Zewei Song, Daisuke Sakuma

    Fungal Ecology　41　198-208　2019/07

  38. Cross-kingdom interactions between slime molds and arthropods: a spore dispersal mutualism hypothesis Peer-reviewed

    Shinji Sugiura, Yu Fukasawa, Ryo Ogawa, Shin-ichi Kawakami, Kazuo Yamazaki

    Ecology　100　e02702　2019/06

  39. Does typhoon disturbance in subalpine forest have long-lasting impacts on saproxylic fungi, bryophytes, and seedling regeneration on coarse woody debris? Peer-reviewed

    Yu Fukasawa, Yoko Ando, Yoshitaka Oishi, Satoshi N. Suzuki, Kimiyo Matsukura, Kunihiro Okano, Zewei Song

    Forest Ecology and Management　432　309-318　2019/01/15

    DOI： 10.1016/j.foreco.2018.09.036 　

    ISSN： 0378-1127

  40. Pine stumps act as hotspots for seedling regeneration after pine dieback in a mixed natural forest dominated by Chamaecyparis obtusa Peer-reviewed

    Yu Fukasawa

    Ecological Research　1-11　2018/06/12

    Publisher: Springer Tokyo

    DOI： 10.1007/s11284-018-1631-z 　

    ISSN： 1440-1703 0912-3814

  41. Foraging association between myxomycetes and fungal communities on coarse woody debris Peer-reviewed

    Yu Fukasawa, Fujio Hyodo, Shin-ichi Kawakami

    Soil Biology and Biochemistry　121　95-102　2018/06/01

    Publisher: Elsevier Ltd

    DOI： 10.1016/j.soilbio.2018.03.006 　

    ISSN： 0038-0717

  42. Temperature effects on hyphal growth of wood-decay basidiomycetes isolated from Pinus densiflora deadwood Peer-reviewed

    Yu Fukasawa

    Mycoscience　59　(3)　259-262　2018/05/01

    Publisher: Elsevier B.V.

    DOI： 10.1016/j.myc.2018.02.006 　

    ISSN： 1618-2545 1340-3540

  43. The effects of wood decay type on the growth of bryophyte gametophytes Peer-reviewed

    Yu Fukasawa, Yoko Ando

    Journal of Bryology　40　(2)　159-162　2018/04/03

    Publisher: Taylor and Francis Ltd.

    DOI： 10.1080/03736687.2017.1417778 　

    ISSN： 1743-2820 0373-6687

  44. The giant mycoheterotrophic orchid Erythrorchis altissima is associated mainly with a divergent set of wood-decaying fungi Peer-reviewed

    Yuki Ogura-Tsujita, Gerhard Gebauer, Hui Xu, Yu Fukasawa, Hidetaka Umata, Kenshi Tetsuka, Miho Kubota, Julienne M.-I. Schweiger, Satoshi Yamashita, Nitaro Maekawa, Masayuki Maki, Shiro Isshiki, Tomohisa Yukawa

    Molecular Ecology　27　(5)　1324-1337　2018/03/01

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1111/mec.14524 　

    ISSN： 1365-294X 0962-1083

  45. Fungal succession and decomposition of Pinus densiflora snags Peer-reviewed

    Yu Fukasawa

    Ecological Research　33　(2)　435-444　2018/03/01

    Publisher: Springer Tokyo

    DOI： 10.1007/s11284-017-1557-x 　

    ISSN： 1440-1703 0912-3814

  46. Geographical distribution of myxomycetes living on Cryptomeria japonica bark in Japan Peer-reviewed

    Kazunari Takahashi, Yuichi Harakon, Yu Fukasawa

    Mycoscience　2018

    Publisher: Elsevier B.V.

    DOI： 10.1016/j.myc.2018.02.005 　

    ISSN： 1618-2545 1340-3540

  47. Species effects of bryophyte colonies on tree seeding regeneration on coarse woody debris Peer-reviewed

    Yu Fukasawa, Yoko Ando

    Ecological Research　33　(1)　191-197　2018/01/01

    Publisher: Springer Tokyo

    DOI： 10.1007/s11284-017-1524-6 　

    ISSN： 1440-1703 0912-3814

  48. Comparison of fungal communities associated with spruce seedling roots and bryophyte carpets on logs in an old-growth subalpine coniferous forest in Japan Peer-reviewed

    Yu Fukasawa, Yoko Ando, Zewei Song

    FUNGAL ECOLOGY　30　122-131　2017/12

    DOI： 10.1016/j.funeco.2017.10.001 　

    ISSN： 1754-5048

    eISSN： 1878-0083

  49. Regeneration of Cryptomeria japonica seedlings on pine logs in a forest damaged by pine wilt disease: effects of wood decomposer fungi on seedling survival and growth Peer-reviewed

    Yu Fukasawa, Yasuyuki Komagata

    Journal of Forest Research　22　(6)　375-379　2017/11/02

    Publisher: Taylor and Francis Ltd.

    DOI： 10.1080/13416979.2017.1380398 　

    ISSN： 1610-7403 1341-6979

  50. Nutrient mobilization by plasmodium of myxomycete Physarum rigidum in deadwood Peer-reviewed

    Yu Fukasawa, Yasuyuki Komagata, Shin-ichi Kawakami

    FUNGAL ECOLOGY　29　42-44　2017/10

    DOI： 10.1016/j.funeco.2017.05.005 　

    ISSN： 1754-5048

    eISSN： 1878-0083

  51. Femsjonia uniseptata (Dacrymycetes, Basidiomycota), a new species collected from Pinus densiflora forests in Japan Peer-reviewed

    Takashi Shirouzu, Yu Fukasawa, Yasuhide Nakamura

    PHYTOTAXA　312　(2)　271-278　2017/07

    DOI： 10.11646/phytotaxa.312.2.10 　

    ISSN： 1179-3155

    eISSN： 1179-3163

  52. Canopy tree species and openness affect foliar endophytic fungal communities of understory seedlings Peer-reviewed

    Saya Kato, Yu Fukasawa, Kenji Seiwa

    ECOLOGICAL RESEARCH　32　(2)　157-162　2017/03

    DOI： 10.1007/s11284-016-1426-z 　

    ISSN： 0912-3814

    eISSN： 1440-1703

  53. Interactive effects of wood decomposer fungal activities and bryophytes on spruce seedling regeneration on coarse woody debris Peer-reviewed

    Yoko Ando, Yu Fukasawa, Yoshitaka Oishi

    ECOLOGICAL RESEARCH　32　(2)　173-182　2017/03

    DOI： 10.1007/s11284-016-1427-y 　

    ISSN： 0912-3814

    eISSN： 1440-1703

  54. The growth of four tree species seedlings on soil and decayed wood of Pinus densiflora Peer-reviewed

    Yu Fukasawa

    Journal of Integrated Field Science　14　1-14　2017/03/01

    Publisher: Field Science Center, Graduate School of Agricultural Science, Tohoku University

    DOI： 10.1080/1943815X.2016.1268165 　

    ISSN： 2433-6122

  55. Fungal wood decomposer activity induces niche separation between two dominant tree species seedlings regenerating on coarse woody material Peer-reviewed

    Y. Fukasawa, Y. Komagata, S. Ushijima

    CANADIAN JOURNAL OF FOREST RESEARCH　47　(1)　106-112　2017/01

    DOI： 10.1139/cjfr-2016-0218 　

    ISSN： 0045-5067

    eISSN： 1208-6037

  56. Roles of pathogens on replacement of tree seedlings in heterogeneous light environments in a temperate forest: a reciprocal seed sowing experiment Peer-reviewed

    Bayandala, Yu Fukasawa, Kenji Seiwa

    JOURNAL OF ECOLOGY　104　(3)　765-772　2016/05

    DOI： 10.1111/1365-2745.12552 　

    ISSN： 0022-0477

    eISSN： 1365-2745

  57. Seedling regeneration on decayed pine logs after the deforestation events caused by pine wilt disease Peer-reviewed

    Y. Fukasawa

    ANNALS OF FOREST RESEARCH　59　(2)　191-198　2016

    DOI： 10.15287/afr.2016.572 　

    ISSN： 1844-8135

  58. Interspecific fungal interactions as mechanisms of fungal community development and wood decomposition in coarse woody debris Invited Peer-reviewed

    Yu Fukasawa

    Japanese Journal of Mycology　56　(2)　83-94　2015/12/01

  59. The geographical gradient of pine log decomposition in Japan Peer-reviewed

    Yu Fukasawa

    FOREST ECOLOGY AND MANAGEMENT　349　29-35　2015/08

    DOI： 10.1016/j.foreco.2015.04.010 　

    ISSN： 0378-1127

    eISSN： 1872-7042

  60. Fungal wood decomposer activities influence community structures of myxomycetes and bryophytes on coarse woody debris Peer-reviewed

    Yu Fukasawa, Kazunari Takahashi, Tomotsugu Arikawa, Tsutomu Hattori, Nitaro Maekawa

    FUNGAL ECOLOGY　14　44-52　2015/04

    DOI： 10.1016/j.funeco.2014.11.003 　

    ISSN： 1754-5048

    eISSN： 1878-0083

  61. Basidiomycetous ectomycorrhizal fungal communities of current-year Pinus densiflora seedlings that regenerated on decayed logs and on the forest floor soil Peer-reviewed

    Yu Fukasawa

    Journal of Integrated Field Science　12　19-30　2015

    Publisher: Field Science Center, Graduate School of Agricultural Science, Tohoku University

  62. Application of C-13 NMR spectroscopy to characterize organic chemical components of decomposing coarse woody debris from different climatic regions Peer-reviewed

    T. Hishinuma, T. Osono, Y. Fukasawa, J. I. Azuma, H. Takeda

    ANNALS OF FOREST RESEARCH　58　(1)　3-13　2015

    DOI： 10.15287/afr.2015.356 　

    ISSN： 1844-8135

  63. Communities of wood-inhabiting fungi in dead pine logs along a geographical gradient in Japan Peer-reviewed

    Yu Fukasawa, Shunsuke Matsuoka

    Fungal Ecology　18　75-82　2015

    Publisher: Elsevier {BV}

    DOI： 10.1016/j.funeco.2015.09.008 　

    ISSN： 1754-5048

  64. Inhabitant changes in long-term mole nesting at the same site, revealed by observing mushroom fruiting at the site Peer-reviewed

    Naohiko Sagara, Yu Fukasawa

    MAMMALIA　78　(3)　383-391　2014/08

    DOI： 10.1515/mammalia-2013-0073 　

    ISSN： 0025-1461

    eISSN： 1864-1547

  65. Accumulation and decay dynamics of coarse woody debris in a Japanese old-growth subalpine coniferous forest Peer-reviewed

    Yu Fukasawa, Shingo Katsumata, Akira S. Mori, Takashi Osono, Hiroshi Takeda

    ECOLOGICAL RESEARCH　29　(2)　257-269　2014/03

    DOI： 10.1007/s11284-013-1120-3 　

    ISSN： 0912-3814

    eISSN： 1440-1703

  66. Ecological networks on coarse woody debris: introduction and perspective Peer-reviewed

    Yu Fukasawa, Satoshi Yamashita

    Japanese Journal of Ecology　63　(3)　301-309　2013/11/30

    Publisher: The Ecological Society of Japan

    DOI： 10.18960/seitai.63.3_301 　

    ISSN： 0021-5007

  67. The influences of wood decay fungi and their decay types on communities of diverse organisms developed on coarse woody debris Peer-reviewed

    深澤遊

    Japanese Journal of Ecology　63　(3)　311-325　2013/11/30

    Publisher: The Ecological Society of Japan

    DOI： 10.18960/seitai.63.3_311 　

    ISSN： 0021-5007

  68. Underground of forest edges -role of mycorrhizal communities on seedling establishment - Peer-reviewed

    Yu Fukasawa, Taiki Kuishi, Kenji Seiwa

    Japanese Journal of Ecology　63　(2)　239-249　2013

    Publisher: The Ecological Society of Japan

    DOI： 10.18960/seitai.63.2_239 　

    ISSN： 0021-5007

  69. Effects of environmental moisture on twig litter decomposition by fungal colonizers Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    Journal of Integrated Field Science　10　1-6　2013/01/01

  70. Fungal succession and decomposition of beech cupule litter Peer-reviewed

    Y. Fukasawa, O. Tateno, Y. Hagiwara, D. Hirose, T. Osono

    ECOLOGICAL RESEARCH　27　(4)　735-743　2012/07

    DOI： 10.1007/s11284-012-0947-3 　

    ISSN： 0912-3814

  71. Effects of wood decomposer fungi on tree seedling establishment on coarse woody debris Peer-reviewed

    Yu Fukasawa

    FOREST ECOLOGY AND MANAGEMENT　266　232-238　2012/02

    DOI： 10.1016/j.foreco.2011.11.027 　

    ISSN： 0378-1127

    eISSN： 1872-7042

  72. Fungal decomposition of woody debris of Castanopsis sieboldii in a subtropical old-growth forest Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    ECOLOGICAL RESEARCH　27　(1)　211-218　2012/01

    DOI： 10.1007/s11284-011-0890-8 　

    ISSN： 0912-3814

    eISSN： 1440-1703

  73. Wood decomposing abilities of diverse lignicolous fungi on nondecayed and decayed beech wood Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    MYCOLOGIA　103　(3)　474-482　2011/05

    DOI： 10.3852/10-246 　

    ISSN： 0027-5514

    eISSN： 1557-2536

  74. Fungal decomposition of beech coarse woody debris in a temperate forest ecosystem

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    Wood: Types, Properties, and Uses　133-149　2011/01

    Publisher: Nova Science Publishers, Inc.

  75. Beech log decomposition by wood-inhabiting fungi in a cool temperate forest floor: a quantitative analysis focused on the decay activity of a dominant basidiomycete Omphalotus guepiniformis Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    ECOLOGICAL RESEARCH　25　(5)　959-966　2010/09

    DOI： 10.1007/s11284-010-0720-4 　

    ISSN： 0912-3814

    eISSN： 1440-1703

  76. Effects of attack of saprobic fungi on twig litter decomposition by endophytic fungi Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    ECOLOGICAL RESEARCH　24　(5)　1067-1073　2009/09

    DOI： 10.1007/s11284-009-0582-9 　

    ISSN： 0912-3814

    eISSN： 1440-1703

  77. Microfungus communities of Japanese beech logs at different stages of decay in a cool temperate deciduous forest Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE　39　(8)　1606-1614　2009/08

    DOI： 10.1139/X09-080 　

    ISSN： 0045-5067

    eISSN： 1208-6037

  78. Dynamics of physicochemical properties and occurrence of fungal fruit bodies during decomposition of coarse woody debris of Fagus crenata Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    JOURNAL OF FOREST RESEARCH　14　(1)　20-29　2009/02

    DOI： 10.1007/s10310-008-0098-0 　

    ISSN： 1341-6979

    eISSN： 1610-7403

  79. Fungal succession associated with the decay of leaves of an evergreen oak, Quercus myrsinaefolia Peer-reviewed

    T. Shirouzu, D. Hirose, Y. Fukasawa, S. Tokumasu

    FUNGAL DIVERSITY　34　87-109　2009/01

    ISSN： 1560-2745

  80. Contribution of symbiotic mycangial fungi to larval nutrition of a leaf-rolling weevil Peer-reviewed

    Chisato Kobayashi, Yu Fukasawa, Dai Hirose, Makoto Kato

    EVOLUTIONARY ECOLOGY　22　(6)　711-722　2008/11

    DOI： 10.1007/s10682-007-9196-2 　

    ISSN： 0269-7653

  81. Tree mortality and habitat shifts in the regeneration trajectory underneath canopy of an old-growth subalpine forest Peer-reviewed

    Akira S. Mori, Yu Fukasawa, Hiroshi Takeda

    FOREST ECOLOGY AND MANAGEMENT　255　(11)　3758-3767　2008/06

    DOI： 10.1016/j.foreco.2008.03.041 　

    ISSN： 0378-1127

    eISSN： 1872-7042

  82. Decomposition of Japanese beech wood by diverse fungi isolated from a cool temperate deciduous forest Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    Mycoscience　46　(2)　97-101　2005

    Publisher: Springer Japan

    DOI： 10.1007/s10267-004-0215-7 　

    ISSN： 1618-2545 1340-3540

  83. Small-scale variation in chemical property within logs of Japanese beech in relation to spatial distribution and decay ability of fungi Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    Mycoscience　46　(4)　209-214　2005

    Publisher: Springer Japan

    DOI： 10.1007/s10267-005-0236-x 　

    ISSN： 1618-2545 1340-3540

  84. Epizootics and behavioral alteration in the arctiid caterpillar Chionarctia nivea (Lepidoptera : Arctiidae) caused by an entomopathogenic fungus, Entomophaga aulicae (Zygomycetes : Entomophthorales) Peer-reviewed

    K Yamazaki, S Sugiura, Y Fukasawa

    ENTOMOLOGICAL SCIENCE　7　(3)　219-223　2004/09

    DOI： 10.1111/j.1479-8298.2004.00066.x 　

    ISSN： 1343-8786

  85. Weevil parasitism of ambrosia galls Peer-reviewed

    S Sugiura, K Yamazaki, Y Fukasawa

    ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA　97　(1)　184-193　2004/01

    ISSN： 0013-8746

  86. Roles of diverse fungi in larch needle-litter decomposition Peer-reviewed

    T Osono, Y Fukasawa, H Takeda

    MYCOLOGIA　95　(5)　820-826　2003/09

    ISSN： 0027-5514

  87. Fungus-gnat Platurocypta punctum (Stannius) (Diptera: Mycetophilidae) having emerged from a fruiting body of slime mold (Myxomycetes) Peer-reviewed

    Shinji Sugiura, Yu Fukasawa, Kazuo Yamazaki

    Japanese Journal of Entomology (N.S.)　5　(4)　143-144　2002/12/25

    Publisher: The Entomological Society of Japan

    ISSN： 1343-8794

    More details Close

    Platurocypta punctum (Stannius) (Diptera: Mycetophilidae) was firstly recorded from Japan based on the adult specimens emerged from a fruiting body of Fuligo septica (L.) (Myxomycetes: Physarales: Physaraceae). We observed the larvae feeding on spores within the fruiting body at Kamigamo Experimental Forest in Kyoto, central Japan. P. punctum may be closely associated with slime molds.

  88. Fungal community structure and physical and chemical properties of decaying beech logs in a cool temperate natural forest Peer-reviewed

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    Applied forest science　11　(2)　7-14　2002/09

    Publisher: The Society of Applied Forest Science

    DOI： 10.20660/applfor.11.2_7 　

    ISSN： 1342-9493

    More details Close

    Fungal community structure and chemical and physical properties of each fungal colonies in decaying beech (Fagus crenata) logs were studied in a cool temperate deciduous forest in Japan. Lignocellulose index (LCI ; relative amount of holocellulose in lignocellulose matrix) was lower in colonies of Ceratocystis sp. (anamorph) and a sterile mycelium than other species. Nitrogen content was higher in colonies of Ceratocystis sp. (anamorph) and Psathyrella candolleana than other species. Water content was higher in a colony of Pleurotus ostreatus than Trametes versicolor, Xylaria sp. (anamorph) and a sterile mycelium. It is suggested that these small scale variation in chemical and physical properties within logs were occurred as a result of the variation in fungal decay ability among species.

  89. 菌核由来の変形体と子実体形成

    Yu Fukasawa

    Myxomycetes　18　53-54　2000/04

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Misc. 26

  1. 枯木からの報告〜心材腐朽と樹洞、ベテラナイゼーション Invited

    深澤遊

    樹からの報告　89　12-13　2024/04

  2. Carbon dynamics of decomposition of dead Quercus trees.

    小南裕志, 深澤遊, 高木正博, 鈴木智之, 竹本周平, 高梨聡, 平田晶子

    日本生態学会大会講演要旨(Web)　71st　2024

  3. 木材腐朽性担子菌類による枯死木分解の生物地理学的研究 Invited

    Yu Fukasawa

    きのこ研だより　46　18-27　2023/12

  4. Effects of oak wilt disease on fungal community composition and wood decomposition in dead Quercus serrata trunks

    木村瑳月, 深澤遊, 小南裕志, 高木正博, 松倉君予, 潮雅之, 小林真, 鈴木智之, 竹本周平, 田中延亮, 上村真由子, 門脇浩明, 衣浦晴生, 山下聡

    日本生態学会大会講演要旨(Web)　70th　2023

  5. Effect of CWD on forest soil carbon budget

    小南裕志, 深澤遊, 高木正博, 鈴木智之, 竹本周平, 平田晶子, 深山貴文, 高梨聡

    日本生態学会大会講演要旨(Web)　70th　2023

  6. 考えるキノコ Invited

    深澤遊

    生物工学会誌　100　(5)　251-251　2022/05

  7. Effect of CWD as hot spot in soil respiration

    小南裕志, 深澤遊, 高木正博, 鈴木智之, 竹本周平

    日本生態学会大会講演要旨(Web)　69th　2022

  8. ナラ枯れがコナラ枯死木の分解・菌類群集に与える影響

    深澤遊, 木村瑳月, 小南裕志, 高木正博, 潮雅之, 松倉君予, 小林真, 鈴木智之, 竹本周平, 田中延亮, 上村真由子, 門脇浩明, 衣浦晴生, 山下聡

    日本森林学会大会学術講演集　133rd　2022

    ISSN： 2187-6576

  9. Decay types and fungal communities of Norway spruce dead wood in Europe

    河崎有希, 松岡俊将, 佐藤博俊, 深澤遊

    日本生態学会大会講演要旨(Web)　69th　2022

  10. Effects of Norway spruce dieback on fungal community and spruce seedling regeneration on dead wood

    深澤遊, POUSKA Vaclav, BACE Radek, ZIBAROVA Lucie, 河崎有希, 松岡俊将, 佐藤博俊, ORMAN Olga, KRAL Kamil, SVOBODA Miroslav

    日本菌学会大会講演要旨集　66th　2022

  11. Yassoモデルを用いたナラ枯れ枯死木の分解CO2放出量の広域環境応答推定

    小南裕志, 深澤遊, 平田晶子, 高木正博, 鈴木智之, 小林真, 田中延亮, 竹本周平, 衣浦晴生, 上村真由子, 門脇浩明, 山下聡, 潮雅之

    日本森林学会大会学術講演集　132nd　2021

    ISSN： 2187-6576

  12. コナラ枯死木の分解過程の緯度比較:ナラ枯れとの関係

    深澤遊, 小南裕志, 高木正博, 鈴木智之, 小林真, 田中延亮, 竹本周平, 衣浦晴生, 上村真由子, 門脇浩明, 山下聡, 潮雅之

    日本森林学会大会学術講演集　132nd　2021

    ISSN： 2187-6576

  13. コナラ枯死木の分解初期に関わる菌類群集の地理分布

    深澤遊, 松倉君予, 小林真, 鈴木智之, 小南裕志, 高木正博, 田中延亮, 竹本周平, 衣浦晴生, 岡野邦宏, 上村真由子, 門脇浩明, 山下聡, 潮雅之

    日本森林学会大会学術講演集　131st　2020

    ISSN： 2187-6576

  14. 気温上昇がコナラ丸太の初期分解へ及ぼす影響

    小林真, 日浦勉, 鈴木智之, 逢沢峰昭, 山本信次, 深澤遊

    日本森林学会大会学術講演集　131st　2020

    ISSN： 2187-6576

  15. Impact of CO2 flux from oak oak withered CWD of Quercus serrata to forest carbon dynamics

    小南裕志, 深澤遊, 高木正博, 松倉君予, 田中延亮, 鈴木智之, 竹本周平, 小林真, 衣浦晴生, 上村真由子, 門脇浩明, 宮崎怜, 山下聡, 潮雅之, 平田晶子, 安宅未央子

    日本生態学会大会講演要旨(Web)　67th　2020

  16. Effects of old dead wood on invertebrate communities in subalpine forests

    鈴木智之, 角田智詞, 兵藤不二夫, 杉浦大輔, 深澤遊, 中森泰三, 金子信博

    日本生態学会大会講演要旨(Web)　67th　2020

  17. コナラ枯死木の分解過程にナラ枯れが与える影響

    深澤遊, 小南裕志, 高木正博, 松倉君予, 田中延亮, 鈴木智之, 小林真, 竹本周平, 衣浦晴生, 上村真由子, 門脇浩明, 宮崎怜, 山下聡, 潮雅之, 岡野邦宏

    日本生態学会大会講演要旨(Web)　66th　ROMBUNNO.B02‐07 (WEB ONLY)　2019/02/09

  18. ナラ枯れ枯死木の分解CO2放出量の広域環境応答

    小南裕志, 深澤遊, 高木正博, 松倉君予, 田中延亮, 鈴木智之, 小林真, 竹本周平, 衣浦晴生, 上村真由子, 門脇浩明, 宮崎怜, 山下聡, 潮雅之

    日本生態学会大会講演要旨(Web)　66th　2019

  19. コナラ枯死木の菌類群集と分解過程にナラ枯れが与える影響

    深澤遊, 田中延亮, 小南裕志, 高木正博, 松倉君予, 上村真由子, 門脇浩明, 宮崎怜, 衣浦晴生, 鈴木智之, 小林真, 山下聡, 潮雅之

    日本生態学会大会講演要旨(Web)　65th　2018

  20. 枯死木を利用する生物群集が森林生態系食物網に与える影響:50年前の風倒地を例に

    鈴木智之, 角田智詞, 杉浦大輔, 兵藤不二夫, 深澤遊, 中森泰三, 金子信博

    日本生態学会大会講演要旨(Web)　65th　ROMBUNNO.T10‐5 (WEB ONLY)　2018

  21. コケを介した菌類群集の影響がトウヒ実生の倒木更新に与える効果

    安藤洋子, 深澤遊, 大石善隆, SONG Zewei

    日本生態学会大会講演要旨(Web)　64th　ROMBUNNO.P1‐H‐267 (WEB ONLY)　2017

  22. 枯れ木をめぐる生物の多様性

    深澤遊

    山から始まる自然保護　15　2016/02

  23. 枯死木を取り巻く生物多様性

    深澤遊

    The Nature Conservation　543　32-34　2015/01/01

  24. 間伐強度の異なるスギ人工林における栄養塩の循環

    林誠二, 渡邉未来, 越川昌美, 渡邉圭司, 多田千佳, 深沢遊, 清和研二

    日本生態学会大会講演要旨集　60　55　2013/03/05

  25. 間伐強度の違いがスギ林土壌からの硝酸溶脱特性に及ぼす影響

    渡邊未来, 林誠二, 渡邊圭司, 錦織達啓, 多田千佳, 深澤遊, 清和研二

    日本陸水学会大会講演要旨集　77th　2012

  26. 菌類の繁殖生態に関わる節足動物の機能と生態 研究集会報告 6 変形菌子実体上の節足動物群集

    杉浦 真治, 深沢 遊, 山崎 一夫

    長崎大学熱帯医学研究所共同研究報告集　13　184-186　2001

    Publisher: 長崎大学

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Books and Other Publications 9

  1. 植物の多次元コミュニケーションダイナミクス

    深澤遊

    エヌ・ティー・エス　2025/02

  2. Dead wood wonderland

    Yu Fukasawa

    Tsukiji Shokan　2023/06

  3. キノコとカビの生態学－枯れ木の中は戦国時代－

    深澤遊

    Kyoritu Shuppan　2017/07/11

    ISBN: 9784320009196

  4. Aboveground-belowground linkages

    Yu Fukasawa, Yu Yoshihara, Yu Matsuki

    2016/09/08

    ISBN: 448602107X

  5. Biodiversity in dead wood

    Yu Fukasawa, Satoshi Yamashita

    Kyoto University Press　2014/03/25

  6. 教養としての森林学

    深澤遊

    文永堂出版　2014/02/20

  7. Wood: Types, Properties and Uses

    Yu Fukasawa, Takashi Osono, Hiroshi Takeda

    Nova Science Publishers　2011/03/30

    ISBN: 1616688378

  8. シリーズ現代の生態学 第11巻「微生物の生態学」

    Yu Fukasawa, Takashi Osono

    Kyoritsu Shuppan Co., Ltd　2011/03

    ISBN: 9784320057395

  9. Fungal decomposition of beech coarse woody debris in a temperate forest ecosystem

    Y. Fukasawa, T. Osono, H. Takeda

    2011

Show all Show first 5

Presentations 25

  1. アカマツ立枯れ木の分解に伴う菌類群集の遷移

    日本菌学会　2013/06/08

  2. 枯死木をめぐる生物間相互作用

    みちのく進化生物セミナー　2013/04/05

  3. 倒木上および地上に更新したアカマツ実生の菌根菌群集

    日本森林学会　2013/03/25

  4. アカマツ倒木の腐朽型の地理的分布

    東北大学植物園研究発表会　2013/03/25

  5. 枯死木をめぐる生物間相互作用

    山形県立博物館「ミクロの世界入門講座」　2013/03/17

  6. アカマツ倒木上に発生した変形菌の窒素・炭素安定同位体比

    兵藤不二夫

    日本生態学会　2013/03/05

  7. ミズキ実生から分離された内生菌の病原菌抵抗性

    加藤さや

    日本生態学会　2013/03/05

  8. 枯死木をめぐる生物間相互作用

    生態学研究センターセミナー　2012/10/19

  9. The influence of decomposer fungi on vascular plant and cryptogams community structure developed on coarse woody debris International-presentation

    Ecosummit 2012　2012/09/30

  10. 菌類によるアカマツ倒木の分解が倒木上に生育するコケ群集に与える影響

    日本森林学会　2012/03/26

  11. 木材腐朽菌の材分解機能が倒木上の樹木実生・コケ・変形菌群集に与える影響

    日本生態学会　2012/03/17

  12. アカマツ倒木上に生育するリョウブ実生の菌根化率

    土壌微生物学会2011年度大会　2011/11

  13. 倒木の腐朽型が倒木上に発生する変形菌相に与える影響

    日本菌学会第55回大会　2011/09/10

  14. Effects of fungal wood decomposition on seedling establishment on coarse woody debris International-presentation

    World Congress of Microbes　2011/08

  15. 倒木がとりもつ生物のつながり

    森林科学セミナー　2011/07/22

  16. アカマツ倒木上に生育するリョウブ実生の菌根化率

    日本生態学会第58回大会　2011/03/08

  17. Effects of fungal wood decomposition on bryophyte communities on Pinus densiflora logs

    Fukasawa Yu, Arikawa Tomotsugu

    The Japanese Forest Society Congress　2011

  18. アカマツ倒木の腐朽型が倒木上に定着する木本実生の密度におよぼす影響

    東北森林科学会第15回大会　2010/08

  19. 広葉樹枯死枝の分解に関わる菌類：竹林と広葉樹林の比較

    日本菌学会第54回大会　2010/05

  20. 都市近郊二次林におけるアカマツ倒木の腐朽型とそれに関わる菌類

    平成22年度日本菌学会関東支部年次大会　2010/04

  21. 市民による里山管理と生物多様性

    野生生物保全シンポジウム「過去から未来へ身近な生き物を呼び戻す」　2009/11

  22. 冷温帯天然林におけるブナ粗大枯死材の分解に関わる菌類群集の動態と機能

    日本菌学会第52回大会　2008/05

  23. Succession of wood inhabiting fungi in relation to decomposition of fallen beech trunks

    Fukasawa Yu, Osono Takashi, Takeda Hiroshi

    The Japanese Forest Society Congress　2007

  24. Small-scale variation in chemical property within logs of Japanese beech in relathion to spatial distribution and decay ability of fungi. International-presentation

    8th Inthernational Mycological Congress　2006/08

  25. ブナ枯死材に生息する菌類の有機物分解能

    第8回微生物をめぐる生物間相互作用に関する小集会　2002/11

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Research Projects 17

  1. 南米における枯死木分解に関わる菌類群集と倒木更新の生物地理

    深澤 遊, 佐藤 博俊, 杉山 賢子, 松岡 俊将

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 国際共同研究加速基金(海外連携研究)

    Institution: 東北大学

    2024/09 - 2028/03

  2. 菌類による枯死木分解が森林の更新と炭素貯留に与える影響は気候でどう変わるか

    深澤 遊, 高木 正博, 小南 裕志, 濱本 亨, 佐藤 博俊, 松岡 俊将, 杉山 賢子

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 東北大学

    2024/04 - 2027/03

  3. 地下の菌類による電気的情報伝達とBVOC放出

    深澤 遊

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 学術変革領域研究(A)

    Institution: 東北大学

    2024/04 - 2026/03

  4. Effect of CWD in forest soil carbon budget

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Forest Research and Management Organization

    2021/04/01 - 2024/03/31

  5. 環北極北方林における枯死木分解に関わる菌類群集と倒木更新の生物地理

    深澤 遊, 佐藤 博俊, 松岡 俊将

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 国際共同研究加速基金(国際共同研究強化(B))

    Institution: 東北大学

    2020/10/27 - 2024/03/31

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    本研究では、北半球の広大な北方林全域を対象として、枯死木の分解と森林の更新に関わる菌類群集の環境応答を明らかにすることにより、気候変動が北方林の分布や炭素収支に与える影響を予測することを目指す。この目的達成のため、北欧、ロシア、北米の各国の研究者の協力のもと野外調査を行うとともに、菌類の環境DNA解析と木材の化学成分分析、生物の分布予測モデルなどのエキスパートからなる国際共同研究チームを編成する。野外調査・分析から得られたパターンを室内培養実験およびモデリングと組み合わせることで、気候の変化が枯死木の菌類群集を変化させ、それが枯死木の分解パターンや枯死木上の樹木実生更新に影響するメカニズムと因果関係を明らかにする。本研究は、現在発展の著しい環境 DNA解析技術を世界にさきがけて地球規模の木材腐朽菌群集の解析に適用するだけでなく、気候変動下における全球レベルの炭素動態、森林生態系の持続性といった様々な学際領域へと融合・発展する可能性を持った国際共同研究である。 2021年は、コロナウイルスの影響により、2020年に引き続き海外調査を進めることができなかった。代わりに、関連するヨーロッパでのサンプルの解析を進めた。その結果、ドイツトウヒ枯死木のリグニン残存率に気温との正の相関が見つかった。また、枯死木から抽出したDNAサンプル中の菌類ITS領域のメタバーコーディングを行った結果高頻度で検出された菌類のうち、褐色腐朽菌のツガサルノコシカケの出現は気温と正の相関、白色腐朽菌のコフキサルノコシカケの出現は降水量と正の相関が見られた。以上から、ヨーロッパのドイツトウヒ倒木の分解は気候条件の影響を受けており、温暖なほどリグニンが蓄積しやすい傾向があることがわかった。

  6. ジオラマ環境における菌糸体ネットワークの知的行動アルゴリズムの解明

    深澤 遊

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 学術変革領域研究(A)

    Institution: 東北大学

    2022/06 - 2024/03

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    本研究では木材腐朽性担子菌類チャカワタケ（Phanerochaete velutina）の培養菌糸体を用い、さまざまな培養条件での菌糸体の成長、行動、分解特性を調べた。まず、基本的な木材分解活性を他の４種の木材腐朽菌と比較し、他種と同様に8ヶ月で16%程度の重量減少を8立方cmのアカマツ材にもたらすことがわかった（Fukasawa & Kaga 2022）。また、土壌培地上で接種源の角材から新しい木材への移動に関して、木材までの距離が菌糸体の行動に与える影響を調べ。その結果、近い木材には完全に菌糸体が移動してしまうが遠い木材には完全に移動せず、２つの木材を繋ぐように菌糸束を存続させることがわかった（Fukasawa & Ishii 2023）。これは資源の距離に応じた菌類の採餌効率を反映した行動だと考えられる。こういった採餌のコストと利益の差し引きに応じた「最適採餌戦略」は動物においてよく研究されてきているが、菌類においても同様に採餌のコストと利益に応じた行動をとっている可能性が示唆された。 次に、野外の森林の地下に菌糸ネットワークを張り巡らせている菌根菌を対象として、生物のシグナル伝達によく用いられている電気的な活性を測定した。東北大学川渡フィールドセンターのコナラが優占する森林の林床に発生していた外生共生菌オオキツネタケ（Laccaria bicolor）の子実体（キノコ）6本に電極を設置して電位変化を測定したところ、降雨に伴いキノコの電位が増加した。時系列因果解析の結果、キノコ間に方向性のある有意な電位の伝達が見られた（Fukasawa et al. 2023）。これは地下の菌糸を介した電気的シグナル伝達の存在を示唆しているのかもしれない。

  7. Carbon allocation model for explaining fungal interspecific interaction and decomposition

    Fukasawa Yu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2019/06/28 - 2022/03/31

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    To demonstrate fungal interspecific competition by computer simulation, we developed agent-based model including carbon allocation strategies of fungi. The model consists of mycelia as agents, their growth, secondary metabolites production, and nutrient transfer as behavioural tactics. Also, we described the effect of secondary metabolites on competitor's growth as interspecific interactions, and the effects of temperature stress on fungal behavioural tactics. Based on this model, we developed an computer simulator to represent fungal competition.

  8. Effects of forest dieback on CO2 efflux

    Fukasawa Yu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2017/04/01 - 2022/03/31

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    The aim of this study is to evaluate the effects of oak wilt disease (OWD) on fungal community and decomposition of dead stems of Quercus serrata. We selected seven forest stand along latitudinal gradient in Japan to monitor decomposition of newly felled logs of Q. serrata. Metabarcoding of fungal DNA ITS region obtained from newly felled stems showed a positive correlation between fungal specie richness and annual temperature or annual precipitation in forest sites suffered by OWD. However, the correlation was not present in the stand with out OWD. Across the 5-year study period, we obtained substantial data and samples to analyze the long-term effects of OWD on fungal community and wood decomposition.

  9. Plant-soil feedbacks in a forest ecosystem governed by functional traits of tree species

    KUROKAWA HIROKO

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Forest Research and Management Organization

    2017/04/01 - 2021/03/31

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    This study aimed to examine the role of plant-soil feedback in tree community assembly and multi-species coexistence mechanism using a trait-based approach. In a 1.2-ha study plot in the Ogawa Forest Reserve (Ibaraki), where population dynamic data and functional traits of adult and juvenile trees on all coexisting tree species have been accumulated, trait data of current-year seedlings and seedlings older than one year were newly collected. In addition, soil biotic and abiotic properties were measured at 10m x 10m grid points within the study area to develop the spatial data on soil properties. This allowed us to analyze the relationship between plant functional traits and population dynamics across growth stages and to analyze the determinants of soil properties. We found that soil properties are influenced by the community-weighted mean of some functional traits of above-ground trees and litter pool on the forest floor.

  10. Long-term effects of dead woods on community composition and structure of detritus food web

    Suzuki Satoshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: The University of Tokyo

    2017/04/01 - 2020/03/31

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    The question of this study is “How will removal of downed logs from wind-disturbed forest affect the forest ecosystem long after the disturbance?” We compared species composition of invertebrates and food web structure in the forests where downed logs had been removed just after the wind disturbance due to a super typhoon in 1959 (unremoved sites) with those in the forests not removed (removed sites). Analysis of stable isotope ratio and fatty acids composition of invertebrates and their food sources revealed that downed logs originated from the typhoon is still contributing as a material resource of many species, and that bacterial pathway was increased in in the food web in the unremoved sites compared to the removed sites.

  11. Relative importance of pathogenic and mycorrhizal fungi in creating species diversity in temperate forests

    Seiwa Kenji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2016/04/01 - 2019/03/31

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    Mechanisms for creating species diversity in deciduous broadleaf forests were revealed by analyzing interactions with pathogenic and mycorrhizal fungi in the vicinity of a single mature tree. Species-specific pathogens in the vicinity of the parent tree caused mortality of the conspecific seedlings and replace them by heterospecific seedlings. We found that the Janzen-Connell hypothesis was also valid in creating species diversity in cool-temperate forests in Japan. On the other hand, in highly dominant species such as Quercus crispula and Fagus crenata, we revealed a positive feedback mechanism, in which the growth of conspecific seedlings was promoted by species-specific mycorrhizal fungi, indicating a mechanism reducing the species diversity.

  12. Latitudinal gradient in fungal decomposition of wood and their effects on spruce seedling establishment(Fostering Joint International Research)

    Fukasawa Yu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)

    Institution: Tohoku University

    2016 - 2019

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    Spruce seedling colonization, wood decay type, and fungal community in spruce logs were surveyed in 6 European countries (Norway, Poland, Czech, Romania, Bulgaria, Greece). Decay type is a categorization of wood decay preference for lignin and holocellulose - two big chemical components of tree cell wall. I found that frequency of brown rot, which accumulate lignin, was high in Norway and Greece. In contrast, frequency of brown rot was relatively low in Central Europe. Spruce seedling density on dead spruce logs was also the largest in Central Europe, and was positively correlated with frequency of white rot, in which lignin was decomposed.

  13. Functional importance of microbial community in biotic interactions controlling spruce seedling regeneration

    Fukasawa Yu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2014/04/01 - 2017/03/31

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    Picea is a dominant tree genus in boreal and subalpine area in Northern hemisphere, and includes important timber species as well. A unique feature of this genus is its regeneration mainly occurs on coarse woody materials such as logs and stumps. However, biotic interactions between wood inhabiting diverse organisms and Picea seedlings are poorly understood. Recently, the authors revealed that wood decay type strongly determines seedling regeneration on deadwood. Wood decay type is a categorization of fungal decay preference for wood structural components, lignin and holocellulose. If lignin was decayed, the wood becomes whitish and fibrous texture and is called white rot, whereas if lignin was not decayed, the wood becomes browny and cubic texture and is called brown rot. In this study, I focus on the wood decay fungal community and their decay function, and its effects on biotic interactions necessary for Picea seedling regeneration on deadwood.

  14. Long-term effects of large-scale windthrow disturbance on forest carbon stock and stand dynamics

    Suzuki Satoshi, FUKASAWA Yu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: The University of Tokyo

    2013/04/01 - 2017/03/31

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    This study explored effects of a large scale windthrow by the Isewan typhoon in 1959 on current carbon stocks and dynamics of subalpine forests. Carbon stocks were measured in forests where downed trees had been salvaged just after the windthrow (salvaged), those not salvaged (unsalvaged), and those where no windthrow had occurred (undamaged). Carbon stocks of live trees in unsalvaged sites were not significantly different from those in salvaged sites, and 74% of those of undamaged sites. Carbon stocks of downed logs in unsalvaged sites were 340% and 630% of those in undamaged and sites, respectively. Stand-level carbon stocks were ca. 120 Mg C/ha in average in unsalvaged and undamaged sites, whereas those in salvaged sites were 88 Mg C/ha. In conclusion, unsalvaged sites sustain carbon stocks equivalent to undamaged sites due to their large amount of downed logs, and the carbon stocks had been reduced by 27% due to the salvage logging that been carried out over a half century ago.

  15. Study on mechanisms of species diversity based on the interaction between plants and fungi, and ecosystem functions

    SEIWA Kenji, SAITO Masanori, HAYASHI Seiji, SUYAMA Yoshihisa, UMEKI Kiyoshi, FUKASAWA Yu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2011/04/01 - 2014/03/31

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    In a temperate forest, we found clear evidences that both negative-feedback with pathogenic fungi and positive-feedback with mycorrhizal fungi strongly determine the seedling performance and consequent species-diversity. In shaded forest understory, host-specific pathogens caused seedling death particularly for conspecifics,increasing species-diversity. In contrast, the host-specific mycorrhizal fungi facilitated seedling performance particularly for conspecifics in gaps, decreasing the diversity. In artificial conifer forests of different species diversity, we revealed that both the ecosystem functions (i.e. ) increased with increasing the species diversity.

  16. Role of fungal decomposition of coarse woody debris of Japanese red pine on forest tree generation after the terrible dieback caused by pine wilt disease

    FUKASAWA Yu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2011 - 2013

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    Ecological impacts of coarse woody debris generated by recent substantial tree diebacks are poorly known. In this study, relationships between decay types of wood and tree seedlings established on fallen logs of Japanese red pine damaged by pine wilt disease were investigated at 30 sites along latitudinal gradient in Japan. I found that annual temperature and precipitation gradient affected decay types of log and then indirectly affect tree seedling establishment on the logs. These results indicates that decomposer fungi is the key agent determining the role of coarse woody debris on forest regeneration after tree dieback phenomenon.

  17. 森林生態系における枯死材分解に関わる菌類の役割評価

    深澤 遊

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 京都大学

    2006 - 2007

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    前年度に行った野外調査の結果から、ブナの粗大枯死材に優占していることが分かった大型菌類および微小菌類の分離菌株を用い、純粋培養下における材分解試験を行い、各菌類の材分解力を比較した。試験には、大型菌類の菌株17種17菌株、微小菌類の菌株13種13菌株を用いた。分解基質として、未分解の新鮮なブナ材の木紛と、あらかじめ白色腐朽菌による分解を受けたブナ枯死材の木紛を用いた。これらの木紛の含水率を3段階に設定したものを試験管に詰め、滅菌した後、各菌類を接種し、20℃暗黒下で6ヶ月間培養した後の木紛の重量減少率、有機物組成を測定した。 結果、あらかじめ白色腐朽菌による分解を受けたブナ枯死材の木紛に対する分解力において、特に含水率の高い条件で微小菌類の材分解力が大型菌類の材分解力を上回る事が示された。通常、未分解の木材に対する分解力は、微小菌類に対して大型菌類の方が大きい事が知られている事から、本研究の結果は非常に興味深い。有機物分析の結果、あらかじめ白色腐朽菌による分解を受けた木紛では、未分解の木紛に比べ微小菌類によるホロセルロース分解が促進された事が分かった。つまり、白色腐朽をうけた木紛では、リグニンによるホロセルロースのガードがはずされているために、リグニンを分解できない微小菌類でも、ホロセルロースが分解できるようになっていることが示唆された。以上の結果、および前年度の野外調査結果をまとめ、「冷温帯天然林におけるブナ粗大枯死材の分解に関わる菌類群集の動態と機能」という題目で学位論文を作成した。これに対し、京都大学より2008年3月24日、博士(農学)の学位が授与された。

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Social Activities 19

  1. 枯木こそ山のにぎわい

    2025/04/05 - 2025/04/05

  2. 枯木が山のにぎわい 〜森の生態系を支える枯木と菌類〜

    2025/03/28 - 2025/03/28

  3. 北限のブナ林における ブナとミズナラの倒木内部の 菌類群集と腐朽型 〜枯れ木が森のなかで果たしている役割とは？〜

    黒松内生物多様性保全奨励事業成果発表会

    2025/03/01 - 2025/03/01

  4. 菌類の菌糸体に見られる知的な行動

    新春交流会

    2025/02/09 - 2025/02/09

  5. 菌類の菌糸体に見られる知的な行動

    関西菌類談話会2025年度総会・講演会

    2025/02/08 - 2025/02/08

  6. 菌類による枯木の分解と森林の生物多様性・炭素貯留

    2024/11/24 - 2024/11/24

  7. 菌類の菌糸体に見られる知的な行動

    第２９回いきものサロン

    2024/11/12 - 2024/11/12

  8. ミニ講座「枯木の生き物観察〜キノコなど〜」

    2024/09/24 - 2024/09/24

  9. 枯木ワンダーランド

    第84回樹木の学校

    2024/09/01 - 2024/09/01

  10. ミニ講演会「菌類観察のすゝめ」

    解放講座

    2024/07/27 - 2024/07/27

  11. 枯れ木こそ、山の賑わいとはどういう意味ですか？

    GROWING REED

    2024/01/21 - 2024/01/21

  12. Good Neighbors

    Good Neighbors

    2023/11/13 - 2023/11/13

  13. 菌類による枯れ木の分解と 森林の生物多様性・炭素貯留

    2024/05/25 -

  14. 菌類による枯れ木の分解と 森林の生物多様性・炭素貯留

    2024/04/28 -

  15. ミクロの世界入門講座

    2013/03/17 -

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    山形県立博物館にて公開講演会を行った。 要旨：枯死木は森林の中で様々な生物の住み場所や食物資源となり、生物多様性の維持に重要な役割を果たしています。本講演では、枯死木を分解する菌類に注目し、枯死木に暮らす様々な生物に菌類がどのような影響を与えるかについて紹介しながら、生物の種多様性だけでなく生物間のつながり（生物間相互作用）の多様性の重要性についても考えたいと思います。

  16. 生態学研究センターセミナー

    2012/10/19 -

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    京都大学生態学研究センターにおいてセミナーを行った。 要旨：倒木や立枯れなどの枯死木は多様な生物の生息場所として森林生態系の種多様性の維持に重要な役割を果たしている。枯死木に形成される多様な生物群集は、複雑な生物間相互作用のネットワークを構成することにより、森林生態系の安定性の維持にも重要な役割を果たしていることが予想されるが、枯死木をめぐる生物種間の相互作用のネットワークについてはほとんど分かっていない。本発表では枯死木分解の主役である菌類の材分解機能に注目し、これが枯死木に生息する他の生物の群集に与える影響を、アカマツの倒木を材料として調査した結果を紹介する。倒木上の変形菌・コケ・樹木実生の群集構造は、菌類の材分解機能を反映した材の「腐朽型」の影響を受けており、菌類が枯死木の分解を介して間接的に枯死木に生息する生物の群集構造に影響を与えていることが示唆された。発表では、菌類から腐朽型、

  17. 菌類生態学講座

    2012/01/22 -

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    大阪市立自然史博物館で開催された菌類生態学講座において、「木材腐朽菌から広がる生物のつながり〜枯死木の生物多様性・生物間相互作用をどう調べるか〜」というタイトルで講演を行った。

  18. 日本変形菌研究会

    2012/01/21 -

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    大阪市立自然史博物館において行われた日本変形菌研究会総会で開催された公開講演会において、「木材腐朽と変形菌」というタイトルで講演を行った。

  19. 森林科学セミナー

    2011/07/22 -

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    秋田県立大学において開催された第91回森林科学セミナーにおいて「倒木がとりもつ生物のつながり」というタイトルで講演を行った。

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Media Coverage 19

  1. Shroom for improvement: Fantastic fungi are altering our world

    Hindustan Times

    2024/06

    Type: Newspaper, magazine

  2. 枯木は生物多様性のワンダーランド Myself

    いのちの環

    2024/05

    Type: Promotional material

  3. キノコが会話？ 電位を検出 東北大など 森林生態系を解明へ

    日本経済新聞

    2023/04

    Type: Newspaper, magazine

  4. 東北大・長岡高専・京大、雨後のキノコの電気的な会話を測定

    日本経済新聞

    2023/03

    Type: Newspaper, magazine

  5. Fungal decision and memory?

    Kahoku Shinpo

    2021/10/25

    Type: Newspaper, magazine

  6. 東北大、菌糸体が資源の栄養状態や新しくエサを与えられるタイミングによって行動を変えていることを発見

    日本経済新聞

    2021/08/25

    Type: Internet

  7. 東北大など、亜高山帯の木材腐朽に対する気候変動影響を予測

    国立環境研究所　環境展望台

    2021/06/29

    Type: Internet

  8. 菌類の数が多いほど木材分解速度が遅く

    The Science News

    2021/05/28

    Type: Newspaper, magazine

  9. キノコが多種類になるほど、枯れ木の分解は遅く 東北大

    JST　Science Portal

    2021/05/14

    Type: Internet

  10. 東北大、多種のキノコの共存が木材の分解を遅らせることを発見

    2021/05/07

    Type: Internet

  11. 東北大、キノコの多様性が枯死木の分解速度を遅らせていることを実証

    2021/05/07

    Type: Internet

  12. キノコの知性、森の知性。人間の想像を超えた知のネットワークが都市のビジョンを変革する

    2021/03/04

    Type: Internet

  13. 東北大、菌類が手持ちの資源量を把握しそれに応じて行動している可能性があることを発見

    2020/12/22

    Type: Internet

  14. キノコは知性を持つか？

    Newton

    2020/02

    Type: Newspaper, magazine

  15. 菌類が記憶・決断能力を持つ!? ～知性の進化 解明に期待～

    2019/12/27

    Type: Newspaper, magazine

  16. カビ状菌類に「知性」発見

    2019/12/26

    Type: Newspaper, magazine

  17. 脳・神経系を持たない菌類に決断・記憶能力、東北大学が発見

    2019/11/12

    Type: Internet

  18. 菌類の持つ記憶能力を発見 東北大などの研究

    2019/11/09

    Type: Internet

  19. 東北大など、菌類が決断・記憶能力を持つことを発見

    2019/11/08

    Type: Internet

Show all Show first 5

Other 1

  1. アカマツ倒木の腐朽型の違いが倒木上に生育する維管束植物・コケ植物・変形菌の種組成におよぼす影響

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    森林において倒木は主に木材腐朽菌の働きにより分解される。菌種による分解力の違いにより、腐朽材には大きく分けて３つの腐朽型（白色腐朽・褐色腐朽・軟腐朽）が知られている。これらの腐朽型の違いは、材の物理化学性の違いを通じて、倒木を住み場所や食物資源として利用する他の生物に影響を与える。例えば、申請者のこれまでの調査により、腐朽型が違うと倒木上に生育する維管束植物の被度が異なることが分かった。このように木材腐朽菌は、倒木の分解を通じて森林の生物多様性や倒木更新に強い影響力を持つ、生態系エンジニアとしての非常に重要な特性を持っていると考えられるが、これまで実証的な研究は行われていない。 そこで本研究では、アカマツの倒木を材料に、腐朽型の違いが倒木上に生育する生物の種組成に与える影響を評価することを目的とする。倒木の腐朽型は樹種の影響を受けるが、アカマツの倒木は上記３つの腐朽型のいずれにもなりやすく、腐朽型の違いの影響を評価するのに最適な材料といえる。本研究は、森林の更新に関わる維管束植物や、樹幹および土壌の生物多様性の指標として注目されるコケ植物と変形菌の種組成と倒木の腐朽型との関係を調べることで、木材腐朽菌の生態系エンジニアとしての特性を評価しようとする点に特色がある。