Jones Stuart E, McMahon Katherine D
Limnology and Marine Sciences Program, University of Wisconsin-Madison, 1415 Engineering Dr., Madison, WI 53706, USA.
Environ Microbiol. 2009 Apr;11(4):905-13. doi: 10.1111/j.1462-2920.2008.01814.x. Epub 2008 Nov 26.
Long distance atmospheric transport of bacterial cells is often implied as a driver of the apparent cosmopolitan distribution of bacterial taxa. Surprisingly, efforts to measure immigration in bacterial communities are rare. An 8-week time series of within-lake bacterial community composition and atmospheric deposition rates and composition were used to estimate the influence of immigration on bacterial community dynamics in two north temperate lakes. Characterization of bacterial community dynamics using automated ribosomal intergenic spacer analysis suggested moderate overlap in composition between the lakes and atmospherically deposited cells. However, taxa that appeared to be delivered by atmospheric deposition had a relatively minor influence on lake bacterial community dynamics. The weak influence of immigrating bacterial taxa suggests that a species-sorting concept best describes aquatic bacterial metacommunity dynamics.
细菌细胞的长距离大气传输常被认为是细菌类群明显的全球分布的驱动因素。令人惊讶的是，测量细菌群落中迁入情况的研究很少。利用两个北温带湖泊内湖细菌群落组成、大气沉降速率和组成的8周时间序列，来估计迁入对细菌群落动态的影响。使用自动核糖体基因间隔区分析对细菌群落动态进行表征，结果表明湖泊与大气沉降细胞之间的组成有适度重叠。然而，似乎由大气沉降带来的类群对湖泊细菌群落动态的影响相对较小。迁入的细菌类群影响较弱，这表明物种分选概念最能描述水生细菌集合群落的动态。
