Annual growth of invasive <Emphasis Type="Italic">Larix kaempferi</Emphasis> seedlings with reference to microhabitat and ectomycorrhizal colonization on a volcano |
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Authors: | Munemitsu Akasaka Shiro Tsuyuzaki Akira Hase |
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Institution: | (1) Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan;(2) Biological Laboratory, Hakodate College, Hokkaido University of Education, Hakodate 040-8567, Japan;(3) Present address: National Institute for Environmental Studies, Research Center for Environmental Risk, 16-2, Onogawa, Tsukuba 305-8506, Japan |
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Abstract: | To investigate the seedling growth of a biologically invasive larch Larix kaempferi (Lamb.) Carr. on Mount Koma, Japan, seedlings were excavated from three microhabitats (bareground = BA, Salix reinii patch = SP, and Larix understory = LU) in three elevational zones. Seedlings showed the highest ectomycorrhizal (ECM) colonization percentage in
the most shaded microhabitat, LU. ECM colonization percentages in BA and SP were found to decrease with decreasing elevation.
These results inferred that the ECM colonization percentages were related to seedling growth, particularly in BA and SP. However,
the annual seedling growth was not synchronized with the increases in either elevational gradients. Although ECM colonization
was most evident in LU, the seedling growth was the lowest. We concluded that the effects of ECM colonization on seedling
growth were reduced mostly by microhabitat characteristics. |
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Keywords: | Biological invasion Elevational gradient ECM colonization Mount Koma Japanese larch Primary succession |
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