期刊
JOURNAL OF SEA RESEARCH
卷 174, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seares.2021.102065
关键词
Algal bloom; Green tide; Intertidal benthic animals; ITS; Ulva macroalgae; Neopyropia aquaculture rafts; The Zhugen sand ridge
资金
- National Key R&D Program of China [2016YFC1402103, 2018YFD0901500]
- Project of Key Laboratory of Marine Ecological Monitoring and Restoration Technologies, M.N.R [202008, 202012]
- National Natural Science Foundation of China [41576163]
- Shanghai Sailing Program [17YF1407900]
- Luo Zhaorao Science and Innova-tion Fund [A1200400201328]
Ulva typically attaches to aquaculture rafts, rocks, and floating objects. Recent research found a large amount of Ulva attached to Littorina sp. in the Subei intertidal zone, but it is not considered the main source of green tide outbreaks. The identified Ulva species attached to Littorina sp. is Ulva flexuosa.
Ulva usually attached to aquaculture rafts, rocks, and floating objects. Previous studies have shown that the world's largest green tides in the Yellow Sea originated from the attached Ulva on rafts. However, a large biomass of Ulva thalli has recently been found attached to Littorina sp. (periwinkles) in the Subei intertidal zone, but it is rarely observed on Bullacta exarata, Portunus sp., and other intertidal benthic animals. The population density of Littorina sp. on the Zhugen sand ridge is approximately 39.2 specimens/m2. A maximum of seven Ulva macroalgae were attached to one periwinkle, and an average of 1.24 Ulva macroalgae were attached to each periwinkle. To determine the contribution of epizoic Ulva on Littorina sp. to floating green tides, these macroalgae were identified with a molecular biology method using internal transcribed spacer (ITS) sequences. Results showed the Ulva attached to Littorina sp. comprised just one species, Ulva flexuosa. Epizoic Ulva attached to intertidal benthic animals in the Zhugen sand ridge does not appear to be the main source of the green tide (the only dominant species is Ulva prolifera) outbreaks in the Southern Yellow Sea.
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