Mechanisms determining the fate of dispersed bacterial communities in new environments

Székely, Anna J.; Berga, Mercè; Langenheder, Silke

doi:10.1038/ismej.2012.80

Cited by 92 publications

(89 citation statements)

References 49 publications

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“…Communities that received immigration therefore either had more varied resource use across species or constituent species each used a wider range of metabolic resources. Our speculation that immigration caused an increase in generalists is consistent with the theory that generalists should be more successful colonists (Dall & Cuthill 1997) and agrees with the outcome of an experiment by Székely et al (2012) which reported that when microbial communities were transplanted between environments of different salinity an overrepresentation of generalists was associated with enhanced functioning.…”

Section: Discussionsupporting

confidence: 91%

“…In addition, immigration might result in colonisation by new species or genotypes that have tolerance for a wide-range of conditions and are therefore pre-adapted to the new environmental conditions (Ackerly 2003;de Mazancourt et al 2008;de Meester et al 2011), especially with long-range microbial dispersal (Nemergut et al 2011). These colonists might restore, maintain or even enhance ecological functions (Székely et al 2012). If wholecommunity adaptation strongly depends on species interactions, however, then the nature of interactions (negative, neutral or positive) might be as influential as immigration in shaping adaptation (Lawrence et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Immigration on the Adaptation of Microbial Communities to Warming

Lawrence

Bell²,

Barraclough³

2016

The American Naturalist

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Theory predicts that immigration can either enhance or impair the rate at which species and whole communities adapt to environmental change, depending on the traits of genotypes and species in the source pool relative to local conditions. These responses in turn will determine how well whole communities function in changing environments. We tested the effects of immigration and experimental warming on microbial communities during an 81 day field experiment. The effects of immigration depended on the warming treatment. In warmed communities immigration was detrimental to community growth whereas in ambient communities it was beneficial. This result is explained if colonists came from a local species pool pre-adapted to ambient conditions. Loss of metabolic diversity, however, was buffered by immigration in both environments. Communities showed increasing local adaptation to temperature conditions during the experiment and this was independent of whether or not they received immigration. Genotypes that comprised the communities were not locally adapted, however, indicating that community local adaptation can be independent of adaptation of component genotypes. Our results are consistent with a greater role for species interactions rather than adaptation of constituent species in determining local adaptation of whole communities, and confirm that immigration can either enhance or impair community responses to environmental change depending on the environmental context.3

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

The Effect of Immigration on the Adaptation of Microbial Communities to Warming

Lawrence

Bell²,

Barraclough³

2016

The American Naturalist

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“…This is in concert with the notion that dispersal limitation alone, however, is not enough to cause spatial turnover in community composition (50). In such a case, dispersed bacteria are filtered by new habitats (species sorting) or by competitive interactions with resident taxa (50,51), resulting in the diversification of physiologically better adapted organisms (11). Overall, our results showed that the spatial distribution of bacterial communities is controlled not only indirectly, through complex trophic interactions, but also directly, by dispersal limitation.…”

Section: Discussionmentioning

confidence: 74%

Biogeography of the Sediment Bacterial Community Responds to a Nitrogen Pollution Gradient in the East China Sea

Xiong

Ye²,

Wang

et al. 2014

Appl Environ Microbiol

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Patterns of microbial distribution represent the integrated effects of historical and biological processes and are thus a central issue in ecology. However, there is still active debate on whether dispersal limitation contributes to microbial diversification in strongly connected systems. In this study, sediment samples were collected along a transect representing a variety of seawater pollution levels in the East China Sea. We investigated whether changes in sediment bacterial community structures would indicate the effects of the pollution gradient and of dispersal limitation. Our results showed consistent shifts in bacterial communities in response to pollution. More geographically distant sites had more dissimilar communities (r ‫؍‬ ؊0.886, P < 0.001) in this strongly connected sediment ecosystem. A variance analysis based on partitioning by principal coordinates of neighbor matrices (PCNM) showed that spatial distance (dispersal limitation) contributed more to bacterial community variation (8.2%) than any other factor, although the environmental factors explained more variance when combined (11.2%). In addition, potential indicator taxa (primarily affiliated with Deltaproteobacteria and Gammaproteobacteria) were identified; these taxa characterized the pollution gradient. This study provides direct evidence that dispersal limitation exists in a strongly connected marine sediment ecosystem and that candidate indicator taxa can be applied to evaluate coastal pollution levels.

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“…Levins' niche width was used to classify the taxa retrieved in Lake Kivu as generalists or specialists based on the environmental conditions in which they developed but not directly on their intrinsic biological properties [85]. Most bacterial taxa identified as generalists were abundant, whereas those identified as specialists were more likely to be rare (mainly in the bulk community), and this pattern was less evident for the potentially active community.…”

Section: Discussionmentioning

confidence: 99%

Vertical Distribution of Functional Potential and Active Microbial Communities in Meromictic Lake Kivu

et al. 2015

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The microbial community composition in meromictic Lake Kivu, with one of the largest CH 4 reservoirs, was studied using 16S rDNA and ribosomal RNA (rRNA) pyrosequencing during the dry and rainy seasons. Highly abundant taxa were shared in a high percentage between bulk (DNA-based) and active (RNA-based) bacterial communities, whereas a high proportion of rare species was detected only in either an active or bulk community, indicating the existence of a potentially active rare biosphere and the possible underestimation of diversity detected when using only one nucleic acid pool. Most taxa identified as generalists were abundant, and those identified as specialists were more likely to be rare in the bulk community. The overall number of environmental parameters that could explain the variation was higher for abundant taxa in comparison to rare taxa. Clustering analysis based on operational taxonomic units (OTUs at 0.03 cutoff) level revealed significant and systematic microbial community composition shifts with depth. In the oxic zone, Actinobacteria were found highly dominant in the bulk community but not in the metabolically active community. In the oxic-anoxic transition zone, highly abundant potentially active Nitrospira and Methylococcales were observed. The cooccurrence of potentially active sulfur-oxidizing and sulfatereducing bacteria in the anoxic zone may suggest the presence of an active yet cryptic sulfur cycle.

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Mechanisms determining the fate of dispersed bacterial communities in new environments

Cited by 92 publications

References 49 publications

The Effect of Immigration on the Adaptation of Microbial Communities to Warming

The Effect of Immigration on the Adaptation of Microbial Communities to Warming

Biogeography of the Sediment Bacterial Community Responds to a Nitrogen Pollution Gradient in the East China Sea

Vertical Distribution of Functional Potential and Active Microbial Communities in Meromictic Lake Kivu

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