气候变化领域集成服务门户(CCPortal): Under ice plankton and lipid dynamics in a subarctic lake

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DOI	10.1093/plankt/fbae018
	Under ice plankton and lipid dynamics in a subarctic lake
	Kers, Erwin; Leu, Eva; Amundsen, Per-Arne; Primicerio, Raul; Kainz, Martin; Poste, Amanda E.
发表日期	2024
ISSN	0142-7873
EISSN	1464-3774
起始页码	46
结束页码	3
卷号	46 期号:3
英文摘要	Climate warming causes shorter winters and changes in ice and snow cover in subarctic lakes, highlighting the need to better understand under-ice ecosystem functioning. The plankton community in a subarctic, oligotrophic lake was studied throughout the ice-covered season, focusing on lipid dynamics and life history traits in two actively overwintering copepods, Cyclops scutifer and Eudiaptomus graciloides. Whereas C. scutifer was overwintering in C-IV to C-V stage, E. graciloides reproduced under ice cover. Both species had accumulated lipids prior to ice-on and showed a substantial decrease in total lipid content throughout the ice-covered period: E. graciloides (60%-38% dw) and C. scutifer (73%-33% dw). Polyunsaturated fatty acids of algal origin were highest in E. graciloides and declined strongly in both species. Stearidonic acid (18:4n-3) content in E. graciloides was particularly high and decreased rapidly during the study period by 50%, probably due to reproduction. The copepods differed in feeding behavior, with the omnivore C. scutifer continuing to accumulate lipids until January, whereas the herbivorous E. graciloides accumulated lipids from under-ice primary production during the last months of ice-cover. Our findings emphasize the importance of lipid accumulation and utilization for actively overwintering copepods irrespective of the timing of their reproduction.
英文关键词	winter ecology; lake ice; Arctic; fatty acids; zooplankton; copepods; phytoplankton
语种	英语
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:001217224000001
来源期刊	JOURNAL OF PLANKTON RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295107
作者单位	UiT The Arctic University of Tromso; Akvaplan-niva; Danube University Krems; Norwegian Institute for Water Research (NIVA); Norwegian Institute Nature Research
推荐引用方式 GB/T 7714	Kers, Erwin,Leu, Eva,Amundsen, Per-Arne,et al. Under ice plankton and lipid dynamics in a subarctic lake[J],2024,46(3).
APA	Kers, Erwin,Leu, Eva,Amundsen, Per-Arne,Primicerio, Raul,Kainz, Martin,&Poste, Amanda E..(2024).Under ice plankton and lipid dynamics in a subarctic lake.JOURNAL OF PLANKTON RESEARCH,46(3).
MLA	Kers, Erwin,et al."Under ice plankton and lipid dynamics in a subarctic lake".JOURNAL OF PLANKTON RESEARCH 46.3(2024).