Resource partitioning and sympatric differentiation among closely related bacterioplankton.

Science
Authors
Keywords
Abstract

Identifying ecologically differentiated populations within complex microbial communities remains challenging, yet is critical for interpreting the evolution and ecology of microbes in the wild. Here we describe spatial and temporal resource partitioning among Vibrionaceae strains coexisting in coastal bacterioplankton. A quantitative model (AdaptML) establishes the evolutionary history of ecological differentiation, thus revealing populations specific for seasons and life-styles (combinations of free-living, particle, or zooplankton associations). These ecological population boundaries frequently occur at deep phylogenetic levels (consistent with named species); however, recent and perhaps ongoing adaptive radiation is evident in Vibrio splendidus, which comprises numerous ecologically distinct populations at different levels of phylogenetic differentiation. Thus, environmental specialization may be an important correlate or even trigger of speciation among sympatric microbes.

Year of Publication
2008
Journal
Science
Volume
320
Issue
5879
Pages
1081-5
Date Published
2008 May 23
ISSN
1095-9203
URL
DOI
10.1126/science.1157890
PubMed ID
18497299
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