The source of the Ulva blooms in the East China Sea by the combination of morphological, molecular and numerical analysis

The Ulva blooms have been observed at the coast of Gouqi Island, East China Sea recently, which was never reported before 2011. This study was designed to identify the species composition, phylogenetic correlation and geographical exchange of the two free-floating Ulva populations in the Yellow Sea...

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Bibliographic Details
Published in:Estuarine, coastal and shelf science coastal and shelf science, 2015-10, Vol.164, p.418-424
Main Authors: Zhang, Jianheng, Liu, Caicai, Yang, Lili, Gao, Song, Ji, Xiao, Huo, Yuanzi, Yu, Kefeng, Xu, Ren, He, Peimin
Format: Article
Language:English
Subjects:
Algal blooms
Aquaculture
Blooms
Brackish
China
Coastal environments
Eutrophication
Exchange
Islands
Mathematical models
Numerical analysis
Populations
Spacers
Ulva
Ulva prolifera
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Summary:The Ulva blooms have been observed at the coast of Gouqi Island, East China Sea recently, which was never reported before 2011. This study was designed to identify the species composition, phylogenetic correlation and geographical exchange of the two free-floating Ulva populations in the Yellow Sea and East China Sea. The results showed that the two populations were all consisted of Ulva prolifera (type 5S-A) and U. prolifera (type 5S-B) using ITS and 5S rDNA spacer region sequences. Based on the further sequence analysis, the samples in the East China Sea were genetically same with the green tide samples in the Yellow Sea, revealing that the two populations originated from one source. Besides, a numerical circulation modeling experiment confirmed that the Ulva blooms in the East China Sea had drifted from the Southern Yellow Sea. This study increases our understanding of the importance of controlling the spread of Ulva macroalgae blooms and their impacts.
ISSN:0272-7714
1096-0015
DOI:10.1016/j.ecss.2015.08.007