期刊
BULLETIN OF MATHEMATICAL BIOLOGY
卷 74, 期 10, 页码 2315-2338出版社
SPRINGER
DOI: 10.1007/s11538-012-9755-8
关键词
Lotka-Volterra; Trade-offs; Community ecology; Niche; Life-history
资金
- Natural Environment Research Council (NERC)
- NERC [NE/D009367/2] Funding Source: UKRI
- Natural Environment Research Council [NE/D009367/2] Funding Source: researchfish
Trade-offs in performance of different ecological functions within a species are commonly offered as an explanation for co-existence in natural communities. Single trade-offs between competitive ability and other life history traits have been shown to support a large number of species, as a result of strong competitive asymmetry. We consider a single competition-fecundity trade-off in a homogeneous environment, and examine the effect of the form of asymmetry on the likelihood of species co-existing. We find conditions that allow co-existence of two species for a general competition function, and show that (1) two species can only co-exist if the competition function is sufficiently steep when the species are similar; (2) when competition is determined by a linear function, no more than two species can co-exist; (3) when the competition between two individuals is determined by a discontinuous step function, this single trade-off can support an arbitrarily large number of species. Further, we show analytically that as the degree of asymmetry in competition increases, the probability of a given number of species co-existing also increases, but note that even in the most favourable conditions, large numbers of species co-existing along a single trade-off is highly unlikely. On this basis, we suggest it is unlikely that single trade-offs are able to support high levels of bio-diversity without interacting other processes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据