气候变化领域集成服务门户(CCPortal): Trophic Dynamics of Calanus hyperboreus in the Pacific Arctic Ocean

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DOI	10.1029/2020JC017063
	Trophic Dynamics of Calanus hyperboreus in the Pacific Arctic Ocean
	Choi H.; Won H.; Kim J.-H.; Yang E.J.; Cho K.-H.; Lee Y.; Kang S.-H.; Shin K.-H.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	The zooplankton community composition in the Pacific Arctic Ocean depends heavily on the sea ice and hydrodynamic conditions. The calanoid copepod Calanus hyperboreus is a dominant Arctic zooplankton, but its diet sources in the Pacific Arctic are unclear. C. hyperboreus individuals were collected in the northern Chukchi Sea (NCS) and the northern-East Siberian Sea (NESS), which display contrasting chlorophyll abundance and sea ice concentration in summer 2018. Nitrogen isotopes of individual amino acid and fatty acid compositions were measured to determine its trophic level (TL) and dominant diet. C. hyperboreus collected in the NCS had higher TL values (3.0 ± 0.2) and a relatively low proportion of C20:5(n-3). In the NESS, C. hyperboreus had lower TL values (2.7 ± 0.2) and a larger percentage of C20:5(n-3), suggesting a greater proportion of diatoms in its diet. Spatial TL variations of C. hyperboreus between the NCS and NESS may be caused by variations in phytoplankton composition (micro-phytoplankton vs. nano- and picophytoplankton) as a result of surface seawater stratification triggered by the inflow of sea ice meltwater as well as summer Bering Sea water through the Bering Strait. These results suggest that the filter-feeding copepod C. hyperboreus could be a useful indicator to understand trophic dynamics in zooplankton food web. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	amino acid; Pacific Arctic; stable isotope; trophic level; zooplankton
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186431
作者单位	Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan, South Korea; Division of Ocean Sciences, Korea Polar Research Institute (KOPRI), Incheon, South Korea
推荐引用方式 GB/T 7714	Choi H.,Won H.,Kim J.-H.,et al. Trophic Dynamics of Calanus hyperboreus in the Pacific Arctic Ocean[J],2021,126(3).
APA	Choi H..,Won H..,Kim J.-H..,Yang E.J..,Cho K.-H..,...&Shin K.-H..(2021).Trophic Dynamics of Calanus hyperboreus in the Pacific Arctic Ocean.Journal of Geophysical Research: Oceans,126(3).
MLA	Choi H.,et al."Trophic Dynamics of Calanus hyperboreus in the Pacific Arctic Ocean".Journal of Geophysical Research: Oceans 126.3(2021).