Drivers of bacterial β-diversity depend on spatial scale
Drivers of bacterial β-diversity depend on spatial scale
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DOI：
10.1073/pnas.1016308108
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发表时间：
2011-05-10
影响因子：
11.1
通讯作者：
Horner-Devine, M. Claire
中科院分区：
文献类型：
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作者：
Martiny, Jennifer B. H.;Eisen, Jonathan A.;Horner-Devine, M. Claire
驱动β-多样性（群落组成的变化）的因素使人们对地球上生物多样性的维持有了深入的了解。在这里，我们测试了细菌β-多样性的基础上的机制是否在厘米大陆空间尺度上变化，通过比较盐沼沉积物中的氨氧化细菌群落的组成。正如在大型生物研究中所观察到的，盐沼细菌β多样性的驱动因素取决于空间尺度。然而，与大型生物研究相反，我们没有发现氨氧化细菌类群在大陆尺度上进化多样化的证据，尽管地理距离和群落相似性之间存在总体关系。我们的数据是一致的想法，在当地规模的扩散限制可以有助于β-多样性，即使相对常见的类群的16 S rRNA基因是全球分布。这些结果强调了考虑多个空间尺度对理解微生物群落学的重要性。
The factors driving beta-diversity (variation in community composition) yield insights into the maintenance of biodiversity on the planet. Here we tested whether the mechanisms that underlie bacterial beta-diversity vary over centimeters to continental spatial scales by comparing the composition of ammonia-oxidizing bacteria communities in salt marsh sediments. As observed in studies of macroorganisms, the drivers of salt marsh bacterial beta-diversity depend on spatial scale. In contrast to macroorganism studies, however, we found no evidence of evolutionary diversification of ammonia-oxidizing bacteria taxa at the continental scale, despite an overall relationship between geographic distance and community similarity. Our data are consistent with the idea that dispersal limitation at local scales can contribute to beta-diversity, even though the 16S rRNA genes of the relatively common taxa are globally distributed. These results highlight the importance of considering multiple spatial scales for understanding microbial biogeography.