TY - JOUR
T1 - Dynamics of bacterial community succession in a salt marsh chronosequence
T2 - Evidences for temporal niche partitioning
AU - Dini-Andreote, Francisco
AU - De Cássia Pereira E Silva, Michele
AU - Triadó-Margarit, Xavier
AU - Casamayor, Emilio O.
AU - Van Elsas, Jan Dirk
AU - Salles, Joana Falcão
N1 - Funding Information:
We thank the anonymous reviewers for their constructive remarks in the previous version of this manuscript. We are grateful to Maarten Schrama, Han Olff and Ruth Howison for information on sampling locations and valuable discussions. We acknowledge Jolanda K Brons for helping in sampling expeditions and data collection, and Fer-nando Dini Andreote for assisting soil physicochemical analysis and valuable comments on the manuscript. We also acknowledge Jonathan Friedman and Bob Dröge for bioinformatics and computational support. We thank the ‘Nederlandse Vereniging voor Natuurmonumenten’ for granting us access to the salt marsh. This research was supported by the Netherlands Organisation for Scientific Research (NWO).
PY - 2014/1/1
Y1 - 2014/1/1
N2 - The mechanisms underlying community assembly and promoting temporal succession are often overlooked in microbial ecology. Here, we studied an undisturbed salt marsh chronosequence, spanning over a century of ecosystem development, to understand bacterial succession in soil. We used 16S rRNA gene-based quantitative PCR to determine bacterial abundance and multitag 454 pyrosequencing for community composition and diversity analyses. Despite 10-fold lower 16S rRNA gene abundances, the initial stages of soil development held higher phylogenetic diversities than the soil at late succession. Temporal variations in phylogenetic β-diversity were greater at initial stages of soil development, possibly as a result of the great dynamism imposed by the daily influence of the tide, promoting high immigration rates. Allogenic succession of bacterial communities was mostly driven by shifts in the soil physical structure, as well as variations in pH and salinity, which collectively explained 84.5% of the variation concerning community assemblage. The community assembly data for each successional stage were integrated into a network co-occurrence analysis, revealing higher complexity at initial stages, coinciding with great dynamism in turnover and environmental variability. Contrary to a spatial niche-based perspective of bacterial community assembly, we suggest temporal niche partitioning as the dominant mechanism of assembly (promoting more phylotype co-occurrence) in the initial stages of succession, where continuous environmental change results in the existence of multiple niches over short periods of time.
AB - The mechanisms underlying community assembly and promoting temporal succession are often overlooked in microbial ecology. Here, we studied an undisturbed salt marsh chronosequence, spanning over a century of ecosystem development, to understand bacterial succession in soil. We used 16S rRNA gene-based quantitative PCR to determine bacterial abundance and multitag 454 pyrosequencing for community composition and diversity analyses. Despite 10-fold lower 16S rRNA gene abundances, the initial stages of soil development held higher phylogenetic diversities than the soil at late succession. Temporal variations in phylogenetic β-diversity were greater at initial stages of soil development, possibly as a result of the great dynamism imposed by the daily influence of the tide, promoting high immigration rates. Allogenic succession of bacterial communities was mostly driven by shifts in the soil physical structure, as well as variations in pH and salinity, which collectively explained 84.5% of the variation concerning community assemblage. The community assembly data for each successional stage were integrated into a network co-occurrence analysis, revealing higher complexity at initial stages, coinciding with great dynamism in turnover and environmental variability. Contrary to a spatial niche-based perspective of bacterial community assembly, we suggest temporal niche partitioning as the dominant mechanism of assembly (promoting more phylotype co-occurrence) in the initial stages of succession, where continuous environmental change results in the existence of multiple niches over short periods of time.
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U2 - 10.1038/ismej.2014.54
DO - 10.1038/ismej.2014.54
M3 - Article
C2 - 24739625
AN - SCOPUS:84921634378
SN - 1751-7362
VL - 8
SP - 1989
EP - 2001
JO - ISME Journal
JF - ISME Journal
IS - 10
ER -