气候变化领域集成服务门户(CCPortal): New insights into the Weddell Sea ecosystem applying a quantitative network approach

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DOI	10.5194/os-20-141-2024
	New insights into the Weddell Sea ecosystem applying a quantitative network approach
	Marina, Tomas I.; Saravia, Leonardo A.; Kortsch, Susanne
发表日期	2024
ISSN	1812-0784
EISSN	1812-0792
起始页码	20
结束页码	1
卷号	20 期号:1
英文摘要	Network approaches can shed light on the structure and stability of complex marine communities. In recent years, such approaches have been successfully applied to study polar ecosystems, improving our knowledge on how they might respond to ongoing environmental changes. The Weddell Sea is one of the most studied marine ecosystems outside the Antarctic Peninsula in the Southern Ocean. Yet, few studies consider the known complexity of the Weddell Sea food web, which in its current form comprises 490 species and 16 041 predator-prey interactions. Here we analysed the Weddell Sea food web, focusing on the species and trophic interactions that underpin ecosystem structure and stability. We estimated the strength for each interaction in the food web, characterised species position in the food web using unweighted and weighted food web properties, and analysed species' roles with respect to the stability of the food web. We found that the distribution of the interaction strength (IS) at the food web level is asymmetric, with many weak interactions and few strong ones. We detected a positive relationship between species median IS and two unweighted properties (i.e. trophic level and the total number of interactions). We also found that only a few species possess key positions in terms of food web stability. These species are characterised by high median IS, a middle to high trophic level, a relatively high number of interactions, and middle to low trophic similarity. In this study, we integrated unweighted and weighted food web information, enabling a more complete assessment of the ecosystem structure and function of the Weddell Sea food web. Our results provide new insights, which are important for the development of effective policies and management strategies, particularly given the ongoing initiative to implement a marine protected area (MPA) in the Weddell Sea.
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences ; Oceanography
WOS类目	Meteorology & Atmospheric Sciences ; Oceanography
WOS记录号	WOS:001189316400001
来源期刊	OCEAN SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303448
作者单位	Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); University of Helsinki
推荐引用方式 GB/T 7714	Marina, Tomas I.,Saravia, Leonardo A.,Kortsch, Susanne. New insights into the Weddell Sea ecosystem applying a quantitative network approach[J],2024,20(1).
APA	Marina, Tomas I.,Saravia, Leonardo A.,&Kortsch, Susanne.(2024).New insights into the Weddell Sea ecosystem applying a quantitative network approach.OCEAN SCIENCE,20(1).
MLA	Marina, Tomas I.,et al."New insights into the Weddell Sea ecosystem applying a quantitative network approach".OCEAN SCIENCE 20.1(2024).