Decades of dietary data demonstrate regional food web structures in the Southern Ocean.
Decades of dietary data demonstrate regional food web structures in the Southern Ocean.
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DOI：
10.1002/ece3.7017
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发表时间：
2021-01
影响因子：
2.6
通讯作者：
Constable A
中科院分区：
文献类型：
--
作者：
McCormack SA;Melbourne-Thomas J;Trebilco R;Blanchard JL;Raymond B;Constable A
了解南大洋区域尺度的食物网结构对于为渔业管理和评估气候变化对南大洋生态系统和生态系统服务的影响提供信息至关重要。从历史上看，南大洋生态系统研究的很大一部分集中在南极磷虾上，它们提供了一条短而高效的食物链，将初级生产者与更高营养水平的生产者联系起来。在过去的15年里，人们已经确定了替代能源途径的存在，并对其在不同地区的相对重要性提出了假设。利用迄今为止编制的最大的环极饮食数据库，我们对南部夏季期间南大洋（定义为南纬40°以南）四个主要区域/扇区的食物网进行了实证环极比较，验证了这些假设。我们使用网络分析和分类食物网结构的概括来证实，虽然南极磷虾在大西洋和东太平洋食物网（包括斯科舍弧和南极半岛西部）中占主导地位，但在印度和西太平洋地区（东南极洲和罗斯海），中上层鱼类和其他磷虾物种是捕食者饮食的主要贡献者。我们还强调了南大洋移动顶端捕食者的跟踪数据和栖息地建模如何显示这些物种在大区域尺度上整合食物网。本研究基于实地观测，对南大洋食物网的区域分化程度和区域间替代能源途径的相对重要性进行了定量评估。了解和探测南大洋生态系统的大范围变化将依赖于了解在区域一级区分和维持食物网结构和功能的过程。利用迄今为止编制的最大的环极地饮食数据库，我们测试了关于中营养水平生物在提供跨越南大洋四个主要海洋区域向高级捕食者转移能量的途径方面的相对重要性的现有假设。通过网络分析和食物网结构的归纳，我们证实了南极磷虾在大西洋和东太平洋食物网的中营养水平上占主导地位，而在印度和西太平洋地区，中上层鱼类和其他磷虾物种是捕食者饮食的主要贡献者。
Understanding regional‐scale food web structure in the Southern Ocean is critical to informing fisheries management and assessments of climate change impacts on Southern Ocean ecosystems and ecosystem services. Historically, a large component of Southern Ocean ecosystem research has focused on Antarctic krill, which provide a short, highly efficient food chain, linking primary producers to higher trophic levels. Over the last 15 years, the presence of alternative energy pathways has been identified and hypotheses on their relative importance in different regions raised. Using the largest circumpolar dietary database ever compiled, we tested these hypotheses using an empirical circumpolar comparison of food webs across the four major regions/sectors of the Southern Ocean (defined as south of 40°S) within the austral summer period. We used network analyses and generalizations of taxonomic food web structure to confirm that while Antarctic krill are dominant as the mid‐trophic level for the Atlantic and East Pacific food webs (including the Scotia Arc and Western Antarctic Peninsula), mesopelagic fish and other krill species are dominant contributors to predator diets in the Indian and West Pacific regions (East Antarctica and the Ross Sea). We also highlight how tracking data and habitat modeling for mobile top predators in the Southern Ocean show that these species integrate food webs over large regional scales. Our study provides a quantitative assessment, based on field observations, of the degree of regional differentiation in Southern Ocean food webs and the relative importance of alternative energy pathways between regions. Understanding and detecting broadscale change in Southern Ocean ecosystems will rely on understanding the processes that differentiate and maintain food web structure and function at a regional level. Using the largest circumpolar dietary database ever compiled, we tested existing hypotheses on the relative importance of mid‐trophic level organisms in providing pathways to transfer energy to higher predators across the four major oceanic sectors of the Southern Ocean. We used network analyses and generalizations of taxonomic food web structure to confirm that while Antarctic krill are dominant in the mid‐trophic level for the Atlantic and East Pacific food webs, mesopelagic fish and other krill species are dominant contributors to predator diets in the Indian and West Pacific regions.
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影响因子：
64.8
作者：
Hindell, Mark A.;Reisinger, Ryan R.;Raymond, Ben
通讯作者：
Raymond, Ben
影响因子：
2.6
作者：
Cherel Y;Parenteau C;Bustamante P;Bost CA
通讯作者：
Bost CA
影响因子：
2.4
作者：
Cherel, Y;Ridoux, V;Rodhouse, PG
通讯作者：
Rodhouse, PG
DOI：
10.1016/j.dsr2.2011.09.001
发表时间：
2012-01-01
影响因子：
3
作者：
Hill, Simeon L.;Keeble, Kathryn;Murphy, Eugene J.
通讯作者：
Murphy, Eugene J.
影响因子：
16.8
作者：
Albouy, Camille;Archambault, Philippe;Gravel, Dominique
通讯作者：
Gravel, Dominique