气候变化领域集成服务门户(CCPortal): Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates

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DOI	10.1139/as-2023-0027
	Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates
	Fuirst, Matthew; Elliott, Kyle H.; Ferguson, Steven H.; Fisk, Aaron T.; Harris, Les N.; Hedges, Kevin J.; Jacobs, Kevin B.; Johnson, Kelsey F.; Loewen, Tracey N.; Matthews, Cory J. D.; Mundy, C. J.; Niemi, Andrea; Ogloff, Wesley R.; Watt, Cortney A.; Yurkowski, David J.
发表日期	2024
EISSN	2368-7460
起始页码	10
结束页码	1
卷号	10 期号:1
英文摘要	Temporal variation in food web structure is widespread among highly seasonal environments, such as the Arctic, and is driven by changes in resource availability. Variation in resource availability can lead to species differences in diet composition, isotopic niche width, and trophic position (TP) across seasons. Here, we used tissue samples that represent two distinct turnover rates for diet (liver = shorter term, muscle = longer term) from 18 fish and three marine mammal species to investigate seasonal (i) variation in TPs within the Southampton Island marine ecosystem of Hudson Bay, (ii) variation in consumer isotopic niche width within this part of the food web, and (iii) variation in community niche dynamics among a fish and marine mammal community using stable carbon (813C) and nitrogen (815N) isotope analyses. Many zooplanktivores and piscivores increased in TP in summer (i.e., shorter-term turnover period), whereas benthic feeders dependent on ice-obligate prey decreased in TP. Most isotopic niche widths and community metrics (815N range, total ellipse area, mean centroid distance) were higher in liver than muscle. Our findings demonstrate seasonal changes in TPs, which suggests that Arctic communities may be differentially affected by longer ice-free periods and earlier onset of primary production due to accelerated climate change.
英文关键词	Southampton Island; marine mammals; marine fishes; food webs; stable isotopes
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Science & Technology - Other Topics
WOS类目	Ecology ; Environmental Sciences ; Multidisciplinary Sciences
WOS记录号	WOS:001186231100001
来源期刊	ARCTIC SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297125
作者单位	University of Guelph; Fisheries & Oceans Canada; McGill University; University of Manitoba; University of Windsor; University of Manitoba; University of Windsor
推荐引用方式 GB/T 7714	Fuirst, Matthew,Elliott, Kyle H.,Ferguson, Steven H.,et al. Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates[J],2024,10(1).
APA	Fuirst, Matthew.,Elliott, Kyle H..,Ferguson, Steven H..,Fisk, Aaron T..,Harris, Les N..,...&Yurkowski, David J..(2024).Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates.ARCTIC SCIENCE,10(1).
MLA	Fuirst, Matthew,et al."Seasonal variation in trophic structure and community niche dynamics of an Arctic coastal community of marine vertebrates".ARCTIC SCIENCE 10.1(2024).