Seasonal and spatial variation in abundance of the copepod Calanus sinicus: Effects of decreasing dissolved oxygen and small jellyfish bloom in northern Yellow Sea, China, nearshore waters

doi:10.1016/j.marpolbul.2020.111653

IOCAS-IR

	Seasonal and spatial variation in abundance of the copepod Calanus sinicus: Effects of decreasing dissolved oxygen and small jellyfish bloom in northern Yellow Sea, China, nearshore waters
	Sun, Xiaohong 1; Sun, Xiyan 2; Zhu, Lixin 1; Li, Xiao 1; Sun, Song3
	2020-12-01
发表期刊	MARINE POLLUTION BULLETIN
ISSN	0025-326X
卷号	161 页码:8
通讯作者	Sun, Song(sunsong@qdio.ac.cn)
摘要	A hypoxia event occurred in the nearshore of the northern Yellow Sea in summer 2016, and a bloom of small jellyfish occurred in June of this year. As a key copepod species in the Yellow Sea, Calanus sinicus exhibits early recruitment mainly in this nearshore area. Therefore, this study assessed the effects of these two phenomena on C. sinicus especially on their early recruitment. Sampling in nearshore waters was performed every month from May to December, except for October 2016. The numerical abundance of eggs and nauplii (E + N), copepodites and adults (C + A) of C. sinicus was determined in relation to environmental factors. Results showed that dissolved oxygen (DO) concentrations decreased from June on, attaining a minimum in August, and showed a significant positive relationship with C. sinicus E + N abundance. This suggested that decreasing DO had potential negative effects on early recruitment of C. sinicus. The abundance of small jellyfish, dominated by Sugiura chengshanense (Hydromedusa), also showed a significant positive relationship with C. sinicus E + N abundance, indicating a potential predator-prey relationship between them. Spatial relationships were also examined between E + N abundance and DO concentration in July and with small jellyfish abundance in June. Both bottom DO (B-DO) and E + N abundance in inshore waters were significantly lower than those in offshore water in July, indicating a potential negative effect of low B-DO (<6 mg L-1) in nearshore water. Spatial variation of small jellyfish abundance showed no correlation with C. sinicus abundance in June, but the non-overlapping patchy distribution also suggested their potential predator-prey relationship. Together, both the seasonal and spatial results indicated that low DO and a small jellyfish bloom in nearshore waters had detrimental effects on early recruitment of C. sinicus. These negative effects thus have the potential to indirectly impact the trophodynamics of fishery resources in the northern Yellow Sea.
关键词	Calanus sinicus Abundance Recruitment Dissolved oxygen Jellyfish
DOI	10.1016/j.marpolbul.2020.111653
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:000599843800004
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/169448
专题	中国科学院海洋研究所
通讯作者	Sun, Song
作者单位	1.Shandong Univ, Marine Coll, 180 Wenhuaxi Rd, Weihai 264209, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Beijing, Peoples R China
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Sun, Xiaohong,Sun, Xiyan,Zhu, Lixin,et al. Seasonal and spatial variation in abundance of the copepod Calanus sinicus: Effects of decreasing dissolved oxygen and small jellyfish bloom in northern Yellow Sea, China, nearshore waters[J]. MARINE POLLUTION BULLETIN,2020,161:8.
APA	Sun, Xiaohong,Sun, Xiyan,Zhu, Lixin,Li, Xiao,&Sun, Song.(2020).Seasonal and spatial variation in abundance of the copepod Calanus sinicus: Effects of decreasing dissolved oxygen and small jellyfish bloom in northern Yellow Sea, China, nearshore waters.MARINE POLLUTION BULLETIN,161,8.
MLA	Sun, Xiaohong,et al."Seasonal and spatial variation in abundance of the copepod Calanus sinicus: Effects of decreasing dissolved oxygen and small jellyfish bloom in northern Yellow Sea, China, nearshore waters".MARINE POLLUTION BULLETIN 161(2020):8.

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