Fire and fungus in a mountain hemlock forest
Fire and fungus in a mountain hemlock forest
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山铁杉林中的火和真菌
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
S. Cook
中科院分区：
文献类型：
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作者：
Alan W. Dickman;S. Cook
俄勒冈州喀斯喀特山脉中部亚高山梅氏铁杉森林中的两种死亡因素造成了大规模的模式。过去 500 年来，18 万公顷研究区域的一半经历了毁灭性的火灾。这些火灾的规模从 1 公顷到 3200 公顷不等。单个桑黄侵扰比大多数火灾要小，总体覆盖的总面积也较小，但其数量更多且分布更细。火灾后的林地长满了松树，这种树在被山铁杉取代之前持续了两个世纪。在树龄超过 200 年的林中，桑黄变得明显，因为它从中心扩散并形成斑块，感染树木并改变植物群落。从 61 起感染中收集了真菌分离株；对这些进行克隆分析。分株和基因的空间分散性支持这样的推论，即许多侵扰是在毁灭性火灾中幸存下来的基因的兄弟分株。基因的年龄分布...
Two mortality factors create large-scale pattern in forests of Tsuga mertensiana in subalpine central Oregon Cascade Mountains. Half of an 18 000 - ha study area has experienced stand-destroying fire during the last 500 years. These fires varied in size from 1 to 3200 ha. Individual Phellinus weirii infestations are smaller than most fires and collectively cover less total area, but they are more numerous and fine-grained in their dispersion. Postfire stands are colonized by Pinus contorta, which persists for 2 centuries before being replaced by mountain hemlock. In stands older than 200 years, Phellinus weirii becomes apparent as it spreads from centers and forms patches where it infects trees and alters the plant community. Fungal isolates were collected from 61 infestations; these were subjected to clonal analyses. Spatial dispersion of ramets and genets supports the inference that many infestations are sibling ramets of genets that have survived stand-destroying fire. The age distribution of genets yi...