Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans
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...
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Online Access: | https://hdl.handle.net/1956/18077 https://doi.org/10.1111/gcb.13797 |
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ftunivbergen:oai:bora.uib.no:1956/18077 2023-05-15T14:24:19+02:00 Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans Langbehn, Tom Varpe, Øystein 2018-03-06T12:17:26Z application/pdf https://hdl.handle.net/1956/18077 https://doi.org/10.1111/gcb.13797 eng eng Wiley http://onlinelibrary.wiley.com/doi/10.1111/gcb.13797/full EC/H2020: No 675997 Fulbright: Fulbright Arctic Initiative 2015/2016 urn:issn:1365-2486 urn:issn:1354-1013 https://hdl.handle.net/1956/18077 https://doi.org/10.1111/gcb.13797 cristin:1512789 Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2017 The Author(s) Global Change Biology photoperiod predator–prey interaction range shift tipping points visual ecology Peer reviewed Journal article 2018 ftunivbergen https://doi.org/10.1111/gcb.13797 2023-03-14T17:38:49Z 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 35 years) 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 ... Article in Journal/Newspaper Arctic Arctic Barents Sea Bering Sea Sea ice ice covered waters University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Barents Sea Bering Sea Global Change Biology 23 12 5318 5330 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
photoperiod predator–prey interaction range shift tipping points visual ecology |
spellingShingle |
photoperiod predator–prey interaction range shift tipping points visual ecology Langbehn, Tom Varpe, Øystein Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans |
topic_facet |
photoperiod predator–prey interaction range shift tipping points visual ecology |
description |
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 35 years) 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 ... |
format |
Article in Journal/Newspaper |
author |
Langbehn, Tom Varpe, Øystein |
author_facet |
Langbehn, Tom Varpe, Øystein |
author_sort |
Langbehn, Tom |
title |
Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans |
title_short |
Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans |
title_full |
Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans |
title_fullStr |
Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans |
title_full_unstemmed |
Sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans |
title_sort |
sea-ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans |
publisher |
Wiley |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18077 https://doi.org/10.1111/gcb.13797 |
geographic |
Arctic Barents Sea Bering Sea |
geographic_facet |
Arctic Barents Sea Bering Sea |
genre |
Arctic Arctic Barents Sea Bering Sea Sea ice ice covered waters |
genre_facet |
Arctic Arctic Barents Sea Bering Sea Sea ice ice covered waters |
op_source |
Global Change Biology |
op_relation |
http://onlinelibrary.wiley.com/doi/10.1111/gcb.13797/full EC/H2020: No 675997 Fulbright: Fulbright Arctic Initiative 2015/2016 urn:issn:1365-2486 urn:issn:1354-1013 https://hdl.handle.net/1956/18077 https://doi.org/10.1111/gcb.13797 cristin:1512789 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2017 The Author(s) |
op_doi |
https://doi.org/10.1111/gcb.13797 |
container_title |
Global Change Biology |
container_volume |
23 |
container_issue |
12 |
container_start_page |
5318 |
op_container_end_page |
5330 |
_version_ |
1766296745890807808 |