Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning
Studies of trophic interactions give valuable insights into the functioning of ecosystems and can be used to identify qualitative differences among ecosystems. Here, we use natural stable isotope concentrations (δ13C and δ15N) to study the food-web structure in four contrasting locations on the nort...
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ftzbmed:oai:frl.publisso.de:frl:6424792 2023-10-09T21:48:39+02:00 Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning Silberberger, Marc Renaud, Paul E. Kröncke, Ingrid Reiss, Henning 2018 https://repository.publisso.de/resource/frl:6424792 https://doi.org/10.3389/fmars.2018.00119 https://www.frontiersin.org/articles/10.3389/fmars.2018.00119/full#supplementary-material eng eng https://repository.publisso.de/resource/frl:6424792 https://doi.org/10.3389/fmars.2018.00119 https://www.frontiersin.org/articles/10.3389/fmars.2018.00119/full#supplementary-material http://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science, 5:119 Lofoten-Vesterålen region sub-Arctic pelagic-benthic coupling North Sea fish benthic invertebrates stable isotope analysis mesopredator release Zeitschriftenartikel 2018 ftzbmed https://doi.org/10.3389/fmars.2018.00119 2023-09-10T22:08:24Z Studies of trophic interactions give valuable insights into the functioning of ecosystems and can be used to identify qualitative differences among ecosystems. Here, we use natural stable isotope concentrations (δ13C and δ15N) to study the food-web structure in four contrasting locations on the northern European continental shelf: two sub-Arctic locations in the Lofoten-Vesterålen region (fjord vs. open shelf) and two temperate locations (northern vs. southern North Sea). Phytoplankton was identified as the major primary producer in all studied ecosystems, even in the sub-Arctic fjord, where macroalgae only played a minor role in the food web. We used mixing models to determine the relative reliance on prey of benthic affinity and found that reliance on benthic prey was higher in the North Sea than in the Lofoten-Vesterålen region. Atlantic cod (Gadus morhua) was identified as the single top-predator in the North Sea, utilizing food from both benthic and pelagic trophic channels. More separate benthic and pelagic trophic channels characterize the Lofoten-Vesterålen region, where G. morhua acts as part of the pelagic food chain. Furthermore, our data indicate that the recent mesopredator outburst in the southern North Sea might have been enhanced by reduced predation pressure due to the collapse of the local cod stocks. We conclude that the resilience toward a high fishing pressure is higher in the Lofoten-Vesterålen region than in the North Sea. Article in Journal/Newspaper Arctic atlantic cod Gadus morhua Lofoten Phytoplankton Vesterålen PUBLISSO Fachrepositorium Lebenswissenschaften (ZB MED) Arctic Lofoten Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
PUBLISSO Fachrepositorium Lebenswissenschaften (ZB MED) |
op_collection_id |
ftzbmed |
language |
English |
topic |
Lofoten-Vesterålen region sub-Arctic pelagic-benthic coupling North Sea fish benthic invertebrates stable isotope analysis mesopredator release |
spellingShingle |
Lofoten-Vesterålen region sub-Arctic pelagic-benthic coupling North Sea fish benthic invertebrates stable isotope analysis mesopredator release Silberberger, Marc Renaud, Paul E. Kröncke, Ingrid Reiss, Henning Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning |
topic_facet |
Lofoten-Vesterålen region sub-Arctic pelagic-benthic coupling North Sea fish benthic invertebrates stable isotope analysis mesopredator release |
description |
Studies of trophic interactions give valuable insights into the functioning of ecosystems and can be used to identify qualitative differences among ecosystems. Here, we use natural stable isotope concentrations (δ13C and δ15N) to study the food-web structure in four contrasting locations on the northern European continental shelf: two sub-Arctic locations in the Lofoten-Vesterålen region (fjord vs. open shelf) and two temperate locations (northern vs. southern North Sea). Phytoplankton was identified as the major primary producer in all studied ecosystems, even in the sub-Arctic fjord, where macroalgae only played a minor role in the food web. We used mixing models to determine the relative reliance on prey of benthic affinity and found that reliance on benthic prey was higher in the North Sea than in the Lofoten-Vesterålen region. Atlantic cod (Gadus morhua) was identified as the single top-predator in the North Sea, utilizing food from both benthic and pelagic trophic channels. More separate benthic and pelagic trophic channels characterize the Lofoten-Vesterålen region, where G. morhua acts as part of the pelagic food chain. Furthermore, our data indicate that the recent mesopredator outburst in the southern North Sea might have been enhanced by reduced predation pressure due to the collapse of the local cod stocks. We conclude that the resilience toward a high fishing pressure is higher in the Lofoten-Vesterålen region than in the North Sea. |
format |
Article in Journal/Newspaper |
author |
Silberberger, Marc Renaud, Paul E. Kröncke, Ingrid Reiss, Henning |
author_facet |
Silberberger, Marc Renaud, Paul E. Kröncke, Ingrid Reiss, Henning |
author_sort |
Silberberger, Marc |
title |
Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning |
title_short |
Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning |
title_full |
Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning |
title_fullStr |
Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning |
title_full_unstemmed |
Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning |
title_sort |
food-web structure in four locations along the european shelf indicates spatial differences in ecosystem functioning |
publishDate |
2018 |
url |
https://repository.publisso.de/resource/frl:6424792 https://doi.org/10.3389/fmars.2018.00119 https://www.frontiersin.org/articles/10.3389/fmars.2018.00119/full#supplementary-material |
long_lat |
ENVELOPE(14.939,14.939,68.754,68.754) |
geographic |
Arctic Lofoten Vesterålen |
geographic_facet |
Arctic Lofoten Vesterålen |
genre |
Arctic atlantic cod Gadus morhua Lofoten Phytoplankton Vesterålen |
genre_facet |
Arctic atlantic cod Gadus morhua Lofoten Phytoplankton Vesterålen |
op_source |
Frontiers in Marine Science, 5:119 |
op_relation |
https://repository.publisso.de/resource/frl:6424792 https://doi.org/10.3389/fmars.2018.00119 https://www.frontiersin.org/articles/10.3389/fmars.2018.00119/full#supplementary-material |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2018.00119 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1779311726383071232 |