Microfungal diversity associated with Kindbergia oregana in successional forests of British Columbia |
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Authors: | Takashi Osono John A Trofymow |
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Institution: | (1) Center for Ecological Research, Kyoto University, Hirano 2-509-3, Otsu Shiga, 520-2113, Japan;(2) Pacific Forestry Centre, Canadian Forest Service, Natural Resource Canada, 506 West Burnside Road, Victoria, BC, V8Z 1M5, Canada |
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Abstract: | Species richness and species composition of microfungi associated with Oregon beaked moss (Kindbergia oregana) were studied at two forest chronosequences on southeast Vancouver Island, British Columbia, Canada. The purposes were to
investigate the effects of clear-cutting and the transformation of old-growth forests into secondary forests on microfungi
and the succession of microfungi in relation to long-term stand development. Green and brown parts of moss were collected
from the forest floor of Douglas-fir (Pseudotsuga menziesii) stands of four age classes: post-harvest regeneration (13–14 years), immature (50–51 years), and mature (85–101 years) stands,
and a control old-growth (296–324 years) stand, and used for the isolation of microfungi. A total of 49 microfungal species
were recorded. Study site, stand age, and moss parts significantly affected the species richness and species composition of
microfungi. The species richness of microfungi was significantly greater on brown than on green moss parts and lower in post-harvest
regenerations than in forest stands of the other age classes. The species composition of major microfungal species changed
gradually along the seral stages. Possible environmental and biological factors that could account for the succession of microfungi
were discussed. |
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