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Variations in the community structure of biofilm-dwelling protozoa at different depths in coastal waters of the Yellow Sea, northern China

Published online by Cambridge University Press:  02 November 2017

Mamun Abdullah Al Open the ORCID record for Mamun Abdullah Al [Opens in a new window] ,
Yangyang Gao ,
Guangjian Xu ,
Zheng Wang ,
Henglong Xu  and
Alan Warren
Mamun Abdullah Al
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao, China
Yangyang Gao
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao, China
Guangjian Xu
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao, China
Zheng Wang
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao, China
Henglong Xu*
Affiliation:
Laboratory of Microbial Ecology, Ocean University of China, Qingdao, China
Alan Warren
Affiliation:
Department of Life Sciences, Natural History Museum, London SW7 5BD, UK
*
Correspondence should be addressed to: H. Xu, Laboratory of Microbial Ecology, Ocean University of China, Qingdao, China email: [email protected]
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Abstract

Biofilm-dwelling protozoa are a primary component of microbiota and play important roles in the functioning of microbial food webs such as the mediation of carbon and energy flux from plankton to benthos in marine ecosystems. To demonstrate the vertical pattern of the protozoan communities, a 1-month baseline survey was carried out in coastal waters of the Yellow Sea, northern China. A total of 40 samples were collected using glass slides as artificial substrates at four depths: 1, 2, 3.5 and 5 m. A total of 50 species were identified, comprising seven dominant and eight commonly distributed species. Species richness and individual species abundances showed a clear decreasing trend down the water column from 1 to 5 m, although the former peaked at a depth of 2 m. Multivariate approaches revealed that protozoan community structure differed significantly among the four depths, except for those at 2 and 3.5 m. Maximum values of species richness, diversity and evenness generally decreased with depth although they peaked at either 2 or 3.5 m. These results suggest that water depth may significantly shape the community patterns of biofilm-dwelling protozoa in marine ecosystems.

Keywords

Biofilm-dwelling protozoacoastal waterscommunity patternvertical distributionwater column
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 99 , Issue 1 , February 2019 , pp. 43 - 50
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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Footnotes

†

Co-first author (M. Abdullah Al & Y. Gao).

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