The power of species sorting: Local factors drive bacterial community composition over a wide range of spatial scales

被引:368
作者
Van der Gucht, Katleen [1 ]
Cottenie, Karl [2 ]
Muylaert, Koenraad [3 ]
Vloemans, Nele [1 ]
Cousin, Sylvie [1 ]
Declerck, Steven [4 ]
Jeppesen, Erik [5 ]
Conde-Porcuna, Jose-Maria [1 ,6 ]
Schwenk, Klaus [7 ]
Zwart, Gabriel [8 ]
Degans, Hanne [4 ]
Vyverman, Wim [1 ]
De Meester, Luc [4 ]
机构
[1] Univ Ghent, Dept Biol, Sect Protistol & Aquat Ecol, B-9000 Ghent, Belgium
[2] Univ Guelph, Dept Integrat Biol, Guelph, ON N1G 2W1, Canada
[3] Katholieke Univ Leuven, Subfac Kortrijk, B-8500 Kortrijk, Belgium
[4] Katholieke Univ Leuven, Aquat Ecol Lab, B-3000 Louvain, Belgium
[5] Univ Aarhus, Natl Environm Res Inst, Dept Freshwater Ecol, DK-8600 Aarhus, Denmark
[6] Univ Granada, Inst Water Res, E-18071 Granada, Spain
[7] Goethe Univ Frankfurt, Dept Ecol & Evolut, D-60054 Frankfurt, Germany
[8] Netherlands Inst Ecol NIOO KNAW, Ctr Limnol, NL-3631 AC Nieuwersluis, Netherlands
关键词
dispersal limitation; metacommunity biology; microbial biogeography; microbial community; mass effects;
D O I
10.1073/pnas.0707200104
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
There is a vivid debate on the relative importance of local and regional factors in shaping microbial communities, and on whether microbial organisms show a biogeographic signature in their distribution. Taking a metacommunity approach, spatial factors can become important either through dispersal limitation (compare large spatial scales) or mass effects (in case of strongly connected systems). We here analyze two datasets on bacterial communities [characterized by community fingerprinting through denaturing gradient gel electrophoresis (DGGE)] in meso- to eutrophic shallow lakes to investigate the importance of spatial factors at three contrasting scales. Variation partitioning on datasets of both the bacterial communities of 11 shallow lakes that are part of a strongly interconnected and densely packed pond system < 1 km apart, three groups of shallow lakes approximate to 100 km apart, as well as these three groups of shallow lakes combined that span a large part of a North-South gradient in Europe (> 2,500 km) shows a strong impact of local environmental factors on bacterial community composition, with a marginal impact of spatial distance. Our results indicate that dispersal is not strongly limiting even at large spatial scales, and that mass effects do not have a strong impact on bacterial communities even in physically connected systems. We suggest that the fast population growth rates of bacteria facilitate efficient species sorting along environmental gradients in bacterial communities over a very broad range of dispersal rates.
引用
收藏
页码:20404 / 20409
页数:6
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