Drivers shaping the diversity and biogeography of total and active bacterial communities in the South China Sea

Author(s)
Yao Zhang, Zihao Zhao, Minhan Dai, Nianzhi Jiao, Gerhard J. Herndl
Abstract

To test the hypothesis that different drivers shape the diversity and biogeography of the total and active bacterial community, we examined the bacterial community composition along two transects, one from the inner Pearl River estuary to the open waters of the South China Sea (SCS) and the other from the Luzon Strait to the SCS basin, using 454 pyrosequencing of the 16S rRNA and 16S rRNA gene (V1-3 regions) and thereby characterizing the active and total bacterial community, respectively. The diversity and biogeographic patterns differed substantially between the active and total bacterial communities. Although the composition of both the total and active bacterial community was strongly correlated with environmental factors and weakly correlated with geographic distance, the active bacterial community displayed higher environmental sensitivity than the total community and particularly a greater distance effect largely caused by the active assemblage from deep waters. The 16S rRNA vs. rDNA relationships indicated that the active bacteria were low in relative abundance in the SCS. This might be due to a high competition between active bacterial taxa as indicated by our community network models. Based on these analyses, we speculate that high competition could cause some dispersal limitation of the active bacterial community resulting in a distinct distance-decay relationship. Altogether, our results indicated that the biogeographic distribution of bacteria in the SCS is the result of both environmental control and distance decay.

Organisation(s)
Functional and Evolutionary Ecology
External organisation(s)
Xiamen University
Journal
Molecular Ecology
Volume
23
Pages
2260-2274
No. of pages
15
ISSN
0962-1083
DOI
https://doi.org/10.1111/mec.12739
Publication date
05-2014
Peer reviewed
Yes
Austrian Fields of Science 2012
106020 Limnology
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/drivers-shaping-the-diversity-and-biogeography-of-total-and-active-bacterial-communities-in-the-south-china-sea(f34994ef-f7ae-4f59-a159-6f38b14bd98b).html