Reconciling niche and neutrality: the continuum hypothesis
Reconciling niche and neutrality: the continuum hypothesis
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DOI：
10.1111/j.1461-0248.2006.00884.x
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发表时间：
2006-04-01
期刊：
影响因子：
8.8
通讯作者：
Messier, C
中科院分区：
文献类型：
--
作者：
Gravel, D;Canham, CD;Messier, C
在这项研究中，我们问，如果不是从根本上反对，利基和中立的理论可以简单地位于一个连续的极端。首先，我们提出了一个模型的招聘概率，结合利基和中立的过程。从这个模型中，我们预测和测试是否相对重要性的生态位与中性过程控制社区动态将取决于社区物种丰富度，生态位重叠和物种的扩散能力（本地和长距离）。结果表明，生态位和中性形式的连续从竞争到随机排斥的两端。在没有移民的情况下，竞争性排斥往往会产生一种固定的利基空间。然而，移民阻止了有限相似性的建立。平衡群落由一组互补和冗余物种组成，其丰度分别由环境条件的分布和移民量决定。
In this study, we ask if instead of being fundamentally opposed, niche and neutral theories could simply be located at the extremes of a continuum. First, we present a model of recruitment probabilities that combines both niche and neutral processes. From this model, we predict and test whether the relative importance of niche vs. neutral processes in controlling community dynamics will vary depending on community species richness, niche overlap and dispersal capabilities of species (both local and long distance). Results demonstrate that niche and neutrality form ends of a continuum from competitive to stochastic exclusion. In the absence of immigration, competitive exclusion tends to create a regular spacing of niches. However, immigration prevents the establishment of a limiting similarity. The equilibrium community consists of a set of complementary and redundant species, with their abundance determined, respectively, by the distribution of environmental conditions and the amount of immigration.