期刊
ENVIRONMENTAL MICROBIOLOGY
卷 17, 期 7, 页码 2336-2351出版社
WILEY
DOI: 10.1111/1462-2920.12692
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资金
- Netherlands Organization for Scientific Research (NWO) [W84-549, WB84-586]
- National Geographic Society [7864-5]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) in Brazil [480122, 490409, 311427]
- Programa de Desarrollo de las Ciencias Basicas (PEDECIBA) in Uruguay
- Maestria en Ciencias Ambientales, Donacion Aguas de la Costa S.A. in Uruguay
- Banco de Seguros del Estado in Uruguay
- National Fund for Scientific Research, Flanders (FWO) [G.0978.10, KAN 1.5.089.09N]
- KU Leuven Research Fund Excellence Center financing [PF/2010/07]
- Centre for Regional change in the Earth System (CRES)
- Danish Strategic Research Council
- Centre for Informatics Research on Complexity in Ecology (CIRCE)
- Aarhus University
- NWO-VENI of The Netherlands Organization for Scientific Research [86312012]
Metacommunity studies on lake bacterioplankton indicate the importance of environmental factors in structuring communities. Yet most of these studies cover relatively small spatial scales. We assessed the relative importance of environmental and spatial factors in shaping bacterioplankton communities across a >6000km latitudinal range, studying 48 shallow lowland lakes in the tropical, tropicali (isothermal subzone of the tropics) and tundra climate regions of South America using denaturing gradient gel electrophoresis. Bacterioplankton community composition (BCC) differed significantly across regions. Although a large fraction of the variation in BCC remained unexplained, the results supported a consistent significant contribution of local environmental variables and to a lesser extent spatial variables, irrespective of spatial scale. Upon correction for space, mainly biotic environmental factors significantly explained the variation in BCC. The abundance of pelagic cladocerans remained particularly significant, suggesting grazer effects on bacterioplankton communities in the studied lakes. These results confirm that bacterioplankton communities are predominantly structured by environmental factors, even over a large-scale latitudinal gradient (6026km), and stress the importance of including biotic variables in studies that aim to understand patterns in BCC.
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