期刊
ECOLOGY LETTERS
卷 23, 期 11, 页码 1635-1642出版社
WILEY
DOI: 10.1111/ele.13595
关键词
Annual; dormancy; germination; iteroparity; lifespan; longevity; perennial; seed bank; seed dispersal
类别
资金
- Future Leaders Fellowship in Plant and Fungal Science
- Bentham-Moxon Trust grant from the Royal Botanic Gardens Kew
- Swedish Research Council
- Swedish Foundation for Strategic Research
- Knut and Alice Wallenberg Foundation
- Royal Botanic Gardens Kew
- UK Department of Environment Food and Rural Affairs
Seed movement and delayed germination have long been thought to represent alternative risk-spreading strategies, but current evidence covers limited scales and yields mixed results. Here we present the first global-scale test of a negative correlation between dispersal and dormancy. The result demonstrates a strong and consistent pattern that species with dormant seeds have reduced spatial dispersal, also in the context of life-history traits such as seed mass and plant lifespan. Long-lived species are more likely to have large, non-dormant seeds that are dispersed far. Our findings provide robust support for the theoretical prediction of a dispersal trade-off between space and time, implying that a joint consideration of risk-spreading strategies is imperative in studying plant life-history evolution. The bet-hedging patterns in the dispersal-dormancy correlation and the associated reproductive traits have implications for biodiversity conservation, via prediction of which plant groups would be most impacted in the changing era.
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