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详细书目
| 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 |
| 奖励: |
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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