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Xinyu ZHAO, Yi ZHONG, Huanxin ZHANG, Tongfei QU, Chengzong HOU, Chen GUAN, Feng LIU, Xuexi TANG, Ying WANG. Comparison of environmental responding strategies between Ulva prolifera and Sargassum horneri: an in-situ study during the co-occurrence of green tides and golden tides in the Yellow Sea, China in 2017[J]. Journal of Oceanology and Limnology, 2021, 39(6): 2252-2266

Comparison of environmental responding strategies between Ulva prolifera and Sargassum horneri: an in-situ study during the co-occurrence of green tides and golden tides in the Yellow Sea, China in 2017

Xinyu ZHAO1,2, Yi ZHONG1, Huanxin ZHANG3, Tongfei QU1, Chengzong HOU1, Chen GUAN1, Feng LIU4, Xuexi TANG1,2, Ying WANG1,2
1 College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China;
2 Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China;
3 College of Geography and Environment, Shandong Normal University, Jinan 250000, China;
4 CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Large-scale green tides in the Yellow Sea occurred for 13 consecutive years since 2007. The unusual co-occurrence of green tides and golden tides occurred in the Yellow Sea in 2017. The causative species are Ulva prolifera and/or Sargassum horneri. Previous studies on physiological response characteristics of U. prolifera and S. horneri are done in the laboratory mainly, and there is no in-situ comparative study in this regard. In this study, the in-situ physiological response characteristics of both species were measured. The results indicated that cyclic electron flow and antioxidant system play more important roles in protecting U. prolifera, while non-photochemical quenching is more important for adapting to the environment in S. horneri. U. prolifera has a stronger ability to utilize nutrients to rapidly increase its biomass under a suitable condition compared to S. horneri.
Key words:    Ulva prolifera|Sargassum horneri|environmental response strategy|in-situ study   
Received: 2020-10-19   Revised: 2020-11-24
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