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Mar Pollut Bull. 2019 Mar;140:301-307. doi: 10.1016/j.marpolbul.2019.01.056. Epub 2019 Feb 1.

Buoyancy potential of dominant green macroalgal species in the Yellow Sea's green tides, China.

Author information

1
Key Laboratory of Science and Engineering for the Marine Ecological Environment, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China.
2
Key Laboratory of Science and Engineering for the Marine Ecological Environment, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China.
3
Key Laboratory of Science and Engineering for the Marine Ecological Environment, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China. Electronic address: wangzl@fio.org.cn.
4
Life Science School, Soochow University, Suzhou 215123, China.

Abstract

Large-scale green tides caused by Ulva prolifera, occurred for 12 consecutive years in the Yellow Sea of China. To resolve the abrupt shift in species composition between attached and floating macroalgal assemblages, field experiments were conducted from May to July 2017 to quantify the net buoyancy force and compare the floating potential of the common green macroalgae from the red algal seaweed Pyropia yezoensis rafts. At the same time, U. prolifera from different sampling locations were tested to study variable buoyancy of this species and the associated influencing factors. Our results illustrated a stronger positive buoyant force and a proportionally greater buoyancy capacity of U. prolifera, compared to the other co-occurring species. Buoyancy is a dynamic trait and is closely correlated with light intensity, morphology and physiological status. The positive buoyancy of U. prolifera is an important factor that helps explain its predominance in the Yellow Sea's large-scale green tides.

KEYWORDS:

Buoyancy capacity; Green tide; Influencing factors; Ulva prolifera; Yellow Sea

PMID:
30803648
DOI:
10.1016/j.marpolbul.2019.01.056
[Indexed for MEDLINE]

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