Successional changes in mycorrhizal type in the pioneer plant communities of a subalpine volcanic desert on Mt. Fuji, Japan
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概要
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Isolated island-like plant communities dominated by the perennial herb Polygonum cuspidatum are typical pioneer vegetation in the subalpine volcanic deserts of Japan. To study the relationship between mycorrhizal associations and plant community development, we conducted a survey of the mycorrhizal status of plants in subalpine island communities in a volcanic desert on Mt. Fuji. Roots of 45 native species, belonging to 23 families, were collected from island communities at 3 different successional stages: (I) pioneer communities dominated by P. cuspidatum, (II) mixed communities of herbs and grass, and (III) mixed communities of herbs and shrubs. Arbuscular mycorrhiza (AM) was the predominant mycorrhizal type in the early stages of community successions (I and II). P. cuspidatum, which had previously been reported as a non-mycorrhizal species, formed AM at the study site. In the later stage (III), 5 mycorrhizal types, AM, ecto-, ericoid, arbutoid and orchid mycorrhizal, were observed. Seven woody species had two types of mycorrhizas (AM and ectomycorrhiza). High spore densities of AM fungi were observed in the soil of the island communities, whereas few spores were observed in bare ground without vegetation cover. The average colonization levels of the AM fungi were within a wide range of 0.1 to 72%, independent of successional progress. These data show that marked increases in mycorrhizal types occur during the succession of island communities, although AM is the predominant mycorrhizal type throughout the successional process.
- 国立極地研究所の論文
- 2005-01-01
著者
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NAKATSUBO Takayuki
Department of Environmental Dynamics and Management, Graduate School of Biosphere Science, Hiroshima
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MASUZAWA Takehiro
Department of Biology, Faculty of Science, Shizuoka University
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Nakatsubo Takayuki
Department Of Biology School Of Education Waseda University
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Masuzawa T
Department Of Biology And Geosciences Graduate School Of Science And Technology Shizuoka University
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Kagawa Atsushi
Department of Biology and Geosciences, Graduate School of Science and Technology, Shizuoka Universit
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Fujiyoshi Masaaki
Department of Human Development, School of Humanities and Culture, Tokai University
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Kagawa Atsushi
Department Of Biology And Geosciences Graduate School Of Science And Technology Shizuoka University
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Nakatsubo T
Department Of Environmental Dynamics And Management Graduate School Of Biosphere Science Hiroshima U
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Nakatsubo T
Hiroshima Univ. Hiroshima Jpn
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Fujiyoshi M
Department Of Human Development School Of Humanities And Culture Tokai University
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Fujiyoshi Masaaki
Department Of Electrical Engineering The Graduate School Of Engineering Tokyo Metropolitan Universit
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Masuzawa Takehiro
Department Of Biology And Geosciences Faculty Of Science Shizuoka University
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