Distance decay of similarity in fungivorous insect communities: assessing dispersal limitation using genetic data
Distance decay of similarity in fungivorous insect communities: assessing dispersal limitation using genetic data
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食真菌昆虫群落相似性的距离衰减：利用遗传数据评估扩散限制
DOI：
10.1002/ecs2.1358
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Kobayashi;T. and Sota;T.
我们评估了分散限制如何影响栖息在分散枯木上的支架真菌子实体的食真菌昆虫群落物种组成的空间变化。昆虫群落在枯木之间表现出显着的相似模式距离衰减，这不能完全用环境条件的差异来解释。为了研究昆虫传播限制是否可以解释距离衰减模式，我们分析了线粒体单倍型数据；有限的扩散预计会在组成物种中产生遗传结构的距离隔离模式。然而，枯木之间的遗传距离与任何物种的地理距离都不相关，并且模拟研究表明，即使遗传差异的分辨率不高，遗传结构的缺失也驳斥了传播限制假说，正如我们的研究一样。因此，扩散限制对我们研究地点内观察到的群落模式没有贡献，这表明未测量的环境因素可能发挥了重要作用。我们的研究表明，遗传数据可以帮助确定组成物种的扩散限制是否是观察到的群落相似性距离衰减的主要原因。
We evaluated how dispersal limitation affected spatial variation in the species composition of fungivorous insect communities inhabiting fruiting bodies of bracket fungi on scattered deadwoods. The insect communities showed significant distance decay of similarity pattern among deadwoods, which was not fully explained by differences in environmental conditions. To investigate whether insect dispersal limitation could explain the distance‐decay pattern, we analyzed mitochondrial haplotype data; limited dispersal is expected to generate an isolation‐by‐distance pattern of genetic structure in component species. However, genetic distance between deadwoods was not correlated with geographic distance in any species, and a simulation study suggested that the absence of genetic structure refutes the dispersal limitation hypothesis even when the resolution of genetic differences is not high, as in our study. Thus, dispersal limitation did not contribute to the observed community patterns within our study site, suggesting that unmeasured environmental factors may have played an important role. Our study demonstrates that genetic data can help determine whether dispersal limitation of component species is the primary cause of observed distance decay in community similarity.