期刊
ECOLOGY
卷 94, 期 7, 页码 1626-1635出版社
WILEY
DOI: 10.1890/12-1459.1
关键词
community assembly; freshwater ecology; microbial ecology; multilevel; hierarchical models; species sorting; trait-based ecology
类别
资金
- James S. McDonnell Foundation
- NSF [DEB-0845932, DEB-0845825, OCE-0928819]
- Division Of Environmental Biology
- Direct For Biological Sciences [0845825] Funding Source: National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [0928819] Funding Source: National Science Foundation
Ecological communities exhibit regular shifts in structure along environmental gradients, but it has proved difficult to dissect the mechanisms by which environmental conditions determine the relative success of species. Functional traits may provide a link between environmental drivers and mechanisms of community membership, but this has not been well tested for phytoplankton, which dominate primary production in many aquatic ecosystems. Here we test whether functional traits of phytoplankton can explain how species respond to gradients of light and phosphorus across U.S. lakes. We find that traits related to light utilization and maximum growth rate can predict species' differential responses to the relative availability of these resources. These results show that laboratory-measured traits are predictive of species' performance under natural conditions, that functional traits provide a mechanistic foundation for community ecology, and that variation in community structure is predictable in spite of the complexity of ecological communities.
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