Cite this paper:
YANG Cuiyun, WANG Jianhua, YU Yang, LIU Sujing, XIA Chuanhai. Seasonal variations in fouling diatom communities on the Yantai coast[J]. Journal of Oceanology and Limnology, 2015, 33(2): 439-446

Seasonal variations in fouling diatom communities on the Yantai coast

YANG Cuiyun, WANG Jianhua, YU Yang, LIU Sujing, XIA Chuanhai
Key Laboratory of Coastal Biology and Biological Research Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Abstract:
Fouling diatoms are a main component of biofi lm, and play an important role in marine biofouling formation. We investigated seasonal variations in fouling diatom communities that developed on glass slides immersed in seawater, on the Yantai coast, northern Yellow Sea, China, using microscopy and molecular techniques. Studies were conducted during 2012 and 2013 over 3, 7, 14, and 21 days in each season. The abundance of attached diatoms and extracellular polymeric substances increased with exposure time of the slides to seawater. The lowest diatom density appeared in winter and the highest species richness and diversity were found in summer and autumn. Seasonal variation was observed in the structure of fouling diatom communities. Pennate diatoms Cylindrotheca, Nitzschia, Navicula, Amphora, Gomphonema, and Licmophora were the main fouling groups. Cylindrotheca sp. dominated in the spring. Under laboratory culture conditions, we found that Cylindrotheca grew very fast, which might account for the highest density of this diatom in spring. The lower densities in summer and autumn might result from the emergence of fouling animals and environmental factors. The Cylindrotheca sp. was identifi ed as Cylindrotheca closterium using18S rDNA sequencing. The colonization process of fouling diatoms and significant seasonal variation in this study depended on environmental and biological factors. Understanding the basis of fouling diatoms is essential and important for developing new antifouling techniques.
Key words:    biofouling|diatom community|seasonal variation|Cylindrotheca closterium   
Received: 2014-04-16   Revised: 2014-05-24
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Articles by WANG Jianhua
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Articles by XIA Chuanhai
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