期刊
GLOBAL CHANGE BIOLOGY
卷 21, 期 10, 页码 3827-3835出版社
WILEY
DOI: 10.1111/gcb.12991
关键词
adaptational lag; Alaska; climate change; ecotype; Eriophorum vaginatum; latitudinal gradient
资金
- NSF [ARC-0908936, PLR-1418010]
- Direct For Biological Sciences
- Division Of Environmental Biology [1026843] Funding Source: National Science Foundation
Plants are often genetically specialized as ecotypes attuned to local environmental conditions. When conditions change, the optimal environment may be physically displaced from the local population, unless dispersal or insitu evolution keep pace, resulting in a phenomenon called adaptational lag. Using a 30-year-old reciprocal transplant study across a 475km latitudinal gradient, we tested the adaptational lag hypothesis by measuring both short-term (tiller population growth rates) and long-term (17-year survival) fitness components of Eriophorum vaginatum ecotypes in Alaska, where climate change may have already displaced the optimum. Analyzing the transplant study as a climate transfer experiment, we showed that the climate optimum for plant performance was displaced ca. 140km north of home sites, although plants were not generally declining in size at home sites. Adaptational lag is expected to be widespread globally for long-lived, ecotypically specialized plants, with disruptive consequences for communities and ecosystems.
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