Isotopic evidence for size-based dietary shifts in the jellyfish Cyanea nozakii in the northern East China Sea

doi:10.1093/plankt/fbaa042

	Isotopic evidence for size-based dietary shifts in the jellyfish Cyanea nozakii in the northern East China Sea
	Wang, Pengpeng 1,2,3,4; Zhang, Fang 1,2,3,4; Liu, Mengtan 4,5; Sun, Song1,2,3,4,5 ; Xian, Haochen 1,2,3,4
	2020-11-01
发表期刊	JOURNAL OF PLANKTON RESEARCH
ISSN	0142-7873
卷号	42 期号:6 页码:689-701
通讯作者	Zhang, Fang(zhangfang@qdio.ac.cn) ; Sun, Song(sunsong@qdio.ac.cn)
摘要	Cyanea nozakii is a common bloom-forming Scyphomedusa in coastal waters of China. To understand the diet of this jellyfish and its trophic relationship with other zooplankton groups, stable isotope delta C-13 and delta N-15 values of C. nozakii in the bloom area within the northern East China Sea (ECS) in August 2017 were analyzed. We examined: first, the size-based variation in C. nozakii stable isotope values, second, the contributions of different food sources to the C. nozakii diet, and possible size-based dietary shifts in individual C. nozakii and, third, the contribution of gelatinous prey to the C. nozakii diet. Isotope values of differently sized C. nozakii ranged from -18.81 to -16.88 parts per thousand for delta C-13 and from 8.23 to 10.46 parts per thousand for delta N-15. A significant change in delta N-15 values implies that the trophic position and the diet of C. nozakii changed as body size increased. The MixSIAR model indicated that C. nozakii underwent a dietary shift during growth, from a seston-dominant diet in smaller medusae to a zooplankton-dominant diet in larger medusae. Copepods were an important food source for C. nozakii, irrespective of size. The mean proportions of gelatinous zooplankton increased significantly in the C. nozakii diet with increasing C. nozakii diameter, suggesting that larger C. nozakii consumed more gelatinous prey. The diet of larger C. nozakii included 9.54% Nemopilema nomurai and 9.53% small medusae. The results suggest that intraguild predation among these jellyfish exist in the northern ECS.
关键词	scyphomedusa gelatinous prey trophic ecology Bayesian statistics food sources
DOI	10.1093/plankt/fbaa042
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFC1404405] ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2018SDKJ0504-3] ; Aoshan Science and Technology Innovation Project[2016ASKJ02-2] ; Mount Tai Scholar Climbing Plan
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:000595482600007
出版者	OXFORD UNIV PRESS
引用统计	被引频次：14[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/337002/169436
专题	海洋生态与环境科学重点实验室胶州湾海洋生态系统国家野外研究站
通讯作者	Zhang, Fang; Sun, Song
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, 7 Nanhai Rd, Qingdao 266071, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Wenhai Rd, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao 266400, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, 7 Nanhai Rd, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Marine Ecosyst Res Stn, 7 Nanhai Rd, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
通讯作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Wang, Pengpeng,Zhang, Fang,Liu, Mengtan,et al. Isotopic evidence for size-based dietary shifts in the jellyfish Cyanea nozakii in the northern East China Sea[J]. JOURNAL OF PLANKTON RESEARCH,2020,42(6):689-701.
APA	Wang, Pengpeng,Zhang, Fang,Liu, Mengtan,Sun, Song,&Xian, Haochen.(2020).Isotopic evidence for size-based dietary shifts in the jellyfish Cyanea nozakii in the northern East China Sea.JOURNAL OF PLANKTON RESEARCH,42(6),689-701.
MLA	Wang, Pengpeng,et al."Isotopic evidence for size-based dietary shifts in the jellyfish Cyanea nozakii in the northern East China Sea".JOURNAL OF PLANKTON RESEARCH 42.6(2020):689-701.

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