Comparison of environmental responding strategies between <i>Ulva prolifera</i> and <i>Sargassum horneri</i>: an in-situ study during the co-occurrence of green tides and golden tides in the Yellow Sea, China in 2017 -- Journal of Oceanology and Limnology,2021,39(6):2252-2266

	Cite this paper:
	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 ZHAO^1,2, Yi ZHONG¹, Huanxin ZHANG³, Tongfei QU¹, Chengzong HOU¹, Chen GUAN¹, Feng LIU⁴, Xuexi TANG^1,2, Ying WANG^1,2

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

Abstract:

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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