期刊
ECOLOGY LETTERS
卷 25, 期 4, 页码 740-753出版社
WILEY
DOI: 10.1111/ele.13944
关键词
competition; dispersal; dormancy; metacommunity; seed bank
类别
资金
- Office of Integrative Activities [EPS--1655726, EPS-2019528]
The study found that seed banks have a significant impact on maintaining regional diversity, especially when dispersal rates are high or intermediate. The interaction between dispersal and dormancy mechanisms plays a key role in maintaining and distributing metacommunity diversity.
Dispersal and dormancy are two common strategies allowing for species persistence and the maintenance of biodiversity in variable environments. However, theory and empirical tests of spatial diversity patterns tend to examine either mechanism in isolation. Here, we developed a stochastic, spatially explicit metacommunity model incorporating seed banks with varying germination and survival rates. We found that dormancy and dispersal had interactive, nonlinear effects on the maintenance and distribution of metacommunity diversity. Seed banks promoted local diversity when seed survival was high and maintained regional diversity through interactions with dispersal. The benefits of seed banks for regional diversity were largest when dispersal was high or intermediate, depending on whether local competition was equal or stabilising. Our study shows that classic predictions for how dispersal affects metacommunity diversity can be strongly influenced by dormancy. Together, these results emphasise the need to consider both temporal and spatial processes when predicting multi-scale patterns of diversity.
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