Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13797 |
Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans | |
Langbehn, Tom J.1,2; Varpe, Oystein2,3 | |
2017-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Norway |
英文摘要 | Light is a central driver of biological processes and systems. Receding sea ice changes the lightscape of high-latitude oceans and more light will penetrate into the sea. This affects bottom-up control through primary productivity and top-down control through vision-based foraging. We model effects of sea-ice shading on visual search to develop a mechanistic understanding of how climate-driven sea-ice retreat affects predator-prey interactions. We adapt a prey encounter model for ice-covered waters, where prey-detection performance of planktivorous fish depends on the light cycle. We use hindcast sea-ice concentrations (past 35years) and compare with a future no-ice scenario to project visual range along two south-north transects with different sea-ice distributions and seasonality, one through the Bering Sea and one through the Barents Sea. The transect approach captures the transition from sub-Arctic to Arctic ecosystems and allows for comparison of latitudinal differences between longitudes. We find that past sea-ice retreat has increased visual search at a rate of 2.7% to 4.2% per decade from the long-term mean; and for high latitudes, we predict a 16-fold increase in clearance rate. Top-down control is therefore predicted to intensify. Ecological and evolutionary consequences for polar marine communities and energy flows would follow, possibly also as tipping points and regime shifts. We expect species distributions to track the receding ice-edge, and in particular expect species with large migratory capacity to make foraging forays into high-latitude oceans. However, the extreme seasonality in photoperiod of high-latitude oceans may counteract such shifts and rather act as a zoogeographical filter limiting poleward range expansion. The provided mechanistic insights are relevant for pelagic ecosystems globally, including lakes where shifted distributions are seldom possible but where predator-prey consequences would be much related. As part of the discussion on photoperiodic implications for high-latitude range shifts, we provide a short review of studies linking physical drivers to latitudinal extent. |
英文关键词 | photoperiod predator-prey interaction range shift tipping points visual ecology |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414969000031 |
WOS关键词 | DIEL VERTICAL MIGRATIONS ; CLIMATE-CHANGE ; PLANKTIVOROUS FISH ; TROPHIC CASCADES ; RANGE SHIFTS ; LIFE-HISTORY ; ARCTIC-OCEAN ; BERING-SEA ; NORTH-SEA ; CALANUS-FINMARCHICUS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16653 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Bergen, Dept Biol, Bergen, Norway; 2.Univ Ctr Svalbard, Longyearbyen, Norway; 3.Akvaplan Niva Fram Ctr, Tromso, Norway |
推荐引用方式 GB/T 7714 | Langbehn, Tom J.,Varpe, Oystein. Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans[J]. GLOBAL CHANGE BIOLOGY,2017,23(12). |
APA | Langbehn, Tom J.,&Varpe, Oystein.(2017).Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans.GLOBAL CHANGE BIOLOGY,23(12). |
MLA | Langbehn, Tom J.,et al."Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans".GLOBAL CHANGE BIOLOGY 23.12(2017). |
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