Niche versus neutrality in structuring the beta diversity of damselfly assemblages
Niche versus neutrality in structuring the beta diversity of damselfly assemblages
复制标题
豆娘组合β多样性构建中的利基与中立
DOI：
10.1111/fwb.12082
复制
发表时间：
2013
影响因子：
2.7
通讯作者：
M. McPeek
中科院分区：
文献类型：
--
作者：
A. Siepielski;M. McPeek
1.群落之间在分类组成上的差异-β多样性-常常被认为是通过生态位划分对生态条件的空间变化作出的分类特异性反应的结果。这种过程衍生的模式是在鲜明的对比，从中性理论的参数，其中类群是生态等价的和β多样性的结果主要是从分散的限制。2.在这里，我们比较了β多样性的豆娘（蜻蜓目：Zygoptera），以前的实验表明，生态位的差异保持属内的社区，但模式的相对丰富的物种内的每个属主要是由中性动力学的组合。3.使用零模型和排序为基础的方法，我们发现，属和（相对于中性理论）物种组合组成在整个景观中的确定性的方式，由环境和空间因素的形状不同。4.虽然观察到的模式与理论相冲突的物种组成，我们认为，这是一个结果，弱生态过滤器的作用，产生空间变化的组合生态相似的物种进行生态漂移社区内。这种模式在相对较弱的扩散系统中尤其可能，如豆娘。
1. Differences among communities in taxonomic composition – beta diversity – are frequently expected to result from taxon-specific responses to spatial variation in ecological conditions, through niche partitioning. Such process-derived patterns are in sharp contrast to arguments from neutral theory, where taxa are ecologically equivalent and beta diversity results primarily from dispersal limitation. 2. Here, we compared beta diversity among assemblages of damselflies (Odonata: Zygoptera), for which previous experiments have shown that niche differences maintain genera within a community, but patterns of relative abundance for species within each genus are shaped primarily by neutral dynamics. 3. Using null-model and ordination-based methods, we find that both genera and (in contrast to neutral theory) species assemblage composition vary across the landscape in a deterministic fashion, shaped by environmental and spatial factors. 4. While the observed patterns in species composition conflict with theory, we suggest that this a result of weak ecological filters acting to produce spatial variation in assemblages of ecologically similar species undergoing ecological drift within communities. Such patterns are especially likely in systems of relatively weak dispersers like damselflies.