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Temporal variation in taxonomic distinctness of biofilm-associated diatoms within the colonization process in coastal ecosystems

Published online by Cambridge University Press:  11 March 2016

Zhongwen Yang ,
Yuping Xu ,
Guangjian Xu  and
Henglong Xu
Zhongwen Yang
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao 266003, China College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
Yuping Xu
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao 266003, China
Guangjian Xu
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao 266003, China
Henglong Xu*
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao 266003, China
*
Correspondence should be addressed to:H. Xu, Laboratory of Microbial Ecology, Ocean University of China, Qingdao 266003, China email: [email protected]
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Abstract

The temporal variation in the taxonomic distinctness of biofilm-associated diatom microflora within the colonization process was studied in coastal waters of the Yellow Sea, northern China from May to June 2014. Samples were collected at depths of 1 and 3 m, using glass slides as an artificial substratum. The colonization dynamics of diatom microflora showed similar species composition at both depths. In the young communities (1–7 days), the taxonomic patterns showed high variability compared with those in the mature ones (10 days and more). However, taxonomic distinctness indices at the two depths differed during early stages (e.g. 1–3 days). The taxonomic diversity (Δ) represented a high variability (coefficients of variation >10%) over all colonization periods, whereas the taxonomic distinctness (Δ*), average taxonomic distinctness (Δ+) and variation in taxonomic distinctness (Λ+) showed high stability (coefficients of variation <10%) after 7 days. Based on these findings, we suggest that the exposure time of more than 7 days may be sufficient to identify the taxonomic distinctness of biofilm-associated diatom microflora for both community research and monitoring programmes in marine ecosystems.

Keywords

colonization dynamicsbiofilm-associated diatommicroflorataxonomic distinctnesscoastal ecosystem
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 96 , Issue 5 , August 2016 , pp. 1119 - 1125
Copyright
Copyright © Marine Biological Association of the United Kingdom 2016 

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