Remote sensing of early-stage green tide in the Yellow Sea for floating-macroalgae collecting campaign

MARINE POLLUTION BULLETIN

卷:133

Article

Xing, Qianguo^1,2  Wu, Lingling^1,2  Tian, Liqiao³  Cui, Tingwei⁴  Li, Lin¹  Kong, Fanzhou⁵  Gao, Xuelu^1,2  Wu, Mengquan⁶ 

[1] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Beijing, Peoples R China

[2] Univ Chinese Acad Sci, Beijing, Peoples R China

[3] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, 129 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China

[4] State Ocean Adm, Inst Oceanog 1, 6 Xianxialing Rd, Qingdao 266061, Peoples R China

[5] Chinese Acad Sci, Inst Oceanog, 6 Nanhai Rd, Qingdao, Peoples R China

[6] Ludong Univ, Yantai, Peoples R China

关键词: Green tide;    Early-stage bloom;    Growth rate;    Biomass;    Floating macroalgae harvesting;    High-resolution satellite image;    The Jiangsu Shoal;    The Yellow Sea;   

DOI  :  10.1016/j.marpolbul.2018.05.035

来源: Elsevier

【 摘 要 】

The world's largest green tide originated from the Jiangsu Shoal of the Yellow Sea was due to fast reproduction of floating green macroalgae (Ulva prolifera). It brought significant impacts on marine environment and ecosystem in the Yellow Sea. In this study, we examined the expansion of green tide from the Jiangsu Shoal during the period from 29 April to 25 June 2016. Using high-resolution satellite images, we revealed a declined growth rate during the northward drifting of early-stage green tide for the first time, i.e., the green tide had higher growth rate (up to 25% per day) in the turbid waters of the Jiangsu Shoal in May and a lower growth rate (low to 3% per day) in the relatively clear waters in the middle of the western Yellow Sea in June, which suggests that water clarity might not be the key factor controlling the growth rate of the floating macroalgae in the surface waters under natural conditions. The high growth rate led to shortened time windows for controlling the green tide by employing macroalgae collecting campaigns at the initial sites of the green tide, which was no more than 14 days in the 2016 case.

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