Department of Ecology and Evolution/Population Biology, Uppsala University, Norbyvägen 18D, SE-75236 Uppsala, Sweden.
Ecol Lett. 2010 Jan;13(1):118-27. doi: 10.1111/j.1461-0248.2009.01413.x. Epub 2009 Nov 23.
Microbial ecology has focused much on causes of between-site variation in community composition. By analysing five data-sets each of aquatic bacteria and phytoplankton, we demonstrated that microbial communities show a large degree of similarity in community composition and that abundant taxa were widespread, a typical pattern for many metazoan metacommunities. The regional abundance of taxa explained on average 85 and 41% of variation in detection frequency and 58 and 31% of variation in local abundances for bacteria and phytoplankton, respectively. However, regional abundance explained less variation in local abundances with increasing environmental variation between sites within data-sets. These findings indicate that the studies of microbial assemblages need to consider similarities between communities to better understand the processes underlying the assembly of microbial communities. Finally, we propose that the degree of regional invariance can be linked to the evolution of microbes and the variation in ecosystem functions performed by microbial communities.
微生物生态学主要关注群落组成在不同地点间差异的原因。通过分析五个水生细菌和浮游植物数据集，我们证明微生物群落的组成具有很大程度的相似性，丰富的分类群广泛存在，这是许多后生动物后生群落的典型模式。分类群的区域丰度平均解释了细菌和浮游植物检测频率变化的 85%和 41%，以及本地丰度变化的 58%和 31%。然而，随着数据集内各地点之间环境变化的增加，区域丰度对本地丰度的变化解释较少。这些发现表明，研究微生物组合需要考虑群落之间的相似性，以更好地理解微生物群落组装的背后过程。最后，我们提出，区域不变性的程度可以与微生物的进化以及微生物群落所执行的生态系统功能的变化联系起来。
