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Double Keystone Bird in a Keystone Species Complex
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Double Keystone Bird in a Keystone Species Complex

著者: Gretchen C Daily; Paul R Ehrlich; Nick M Haddad
版本/格式: 文章 文章 : 英语
刊登在:Proceedings of the National Academy of Sciences of the United States of America, Jan. 15, 1993, vol. 90, no. 2, p. 592-594
数据库:JSTOR
其它数据库: MEDLINE
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文件类型: 文章
所有的著者/提供者: Gretchen C Daily; Paul R Ehrlich; Nick M Haddad
ISSN:0027-8424
OCLC号码: 479460791
语言注释: English
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摘要:

Species in a Colorado subalpine ecosystem show subtle interdependences. Red-naped sapsuckers play two distinct keystone roles. They excavate nest cavities in fungus-infected aspens that are required as nest sites by two species of swallows, and they drill sap wells into willows that provide abundant nourishment for themselves, hummingbirds, orange-crowned warblers, chipmunks, and an array of other sap robbers. The swallows thus depend on, and the sap robbers benefit from, a keystone species complex comprised of sapsuckers, willows, aspens, and a heartwood fungus. Disappearance of any element of the complex could cause an unanticipated unraveling of the community.

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