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Changes in individual allometry can lead to species coexistence without niche separation

机译：个体异向变化的变化可能导致物种共存而没有利基分离

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摘要

The principle of competitive exclusion is a fundamental tenet of ecology. Commonly used competition models predict that at most only one species per limiting resource can coexist in the same environment at steady state; hence, the upper limit to species diversity depends only on the number of limiting resources and not on the rates of resource supply. We demonstrate that such model behavior is the result of both the growth and biomass turnover functions being proportional to the population biomass. We argue that at least the growth function should be a nonlinear, concave downward function of biomass. This form for the growth function should arise simply because of changes in the allometry of individuals in the population. With this change in model structure, we show that any number of species can coexist at an asymptotically stable steady state, even where there is only one limiting resource. Furthermore, if growth increases nonlinearly with biomass, the steady-state resource concentration and hence the potential for biodiversity increases as the resource supply rate increases.
机译：竞争排斥的原则是生态学的基本宗旨。常用的竞争模型预测，每种限制资源最多只能在稳定状态下的同一环境中共存一种物种。因此，物种多样性的上限仅取决于限制资源的数量，而不取决于资源的供应速度。我们证明这种模型行为是增长和生物量周转函数与人口生物量成正比的结果。我们认为，至少增长函数应该是生物质的非线性向下凹函数。增长功能的这种形式应该仅仅由于人口中个体的异构关系的变化而出现。通过模型结构的这种变化，我们表明，即使只有一种限制资源，任何数量的物种都可以在渐近稳定的稳态下共存。此外，如果增长随生物量的增加而非线性增长，则随着资源供应率的增加，稳态资源集中度以及生物多样性的潜力也会随之增加。

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