Cod response to past and current warm phases in the Seas of Iceland, a time series analysis
Climate change, and in particular global warming, is already affecting the Arctic and is expected to continue in the near future. A sustainable use the Arctic resources requires an increased understanding of its functioning that helps us anticipate change and adapt to it. Cod time series in Iceland...
Main Authors: | , , , , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
Centro Oceanográfico de Cádiz
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/10508/10401 |
id |
ftieo:oai:repositorio.ieo.es:10508/10401 |
---|---|
record_format |
openpolar |
spelling |
ftieo:oai:repositorio.ieo.es:10508/10401 2023-05-15T14:30:30+02:00 Cod response to past and current warm phases in the Seas of Iceland, a time series analysis Llope, M. (Marcos) McGinty, N. Durant, J.M. (Joël M.) Stige, L.C. (Leif Christian) Marteinsdóttir, G. (Gudrún) Stenseth, N.C. (Nils Christian) Arctic Ocean 2016-09-25 http://hdl.handle.net/10508/10401 eng eng Centro Oceanográfico de Cádiz http://hdl.handle.net/10508/10401 ICES Annual Science Conference. (19/09/2016 - 23/09/2016. Riga (Latvia)). today. CM Code: P:178. En: , . Atribución-NoComercial 3.0 España Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess CC-BY-NC-ND Arctic cod regime shifts trophic control thresholds conferenceObject 2016 ftieo 2022-07-26T23:48:53Z Climate change, and in particular global warming, is already affecting the Arctic and is expected to continue in the near future. A sustainable use the Arctic resources requires an increased understanding of its functioning that helps us anticipate change and adapt to it. Cod time series in Iceland cover a period of more than 50 years. Three distinct phases can be identified over this span of time: (1) the current warm phase characterised by relatively high cod biomasses, (2) an earlier phase (around the 1950s) with similar conditions separated by (3) some 20 years of cold temperatures and low biomasses. The aim of this study is to identify possible regime-dependent dynamics associated to these warm and cold phases that can help us identify key drivers in the current and future warm regime. To do this we compiled a database of fishing pressure, hydrographical and biological (copepods and euphausiids) variables as well as three cod population descriptors: (i) total spawning stock biomass, (ii) the population growth rate derived from matrix population models and (iii) disaggregated number at age time series. These three cod indices were subsequently regressed (GAM and threshold GAM) against the environmental and anthropogenic variables. Our results point out a probable regime-dependent mechanism where plankton effects would only be important for cod under warm conditions. No threshold-like responses were found in the population growth rate nor in the number at age for the various age classes. Conference Object Arctic cod Arctic Arctic Ocean Climate change Global warming Iceland Copepods Instituto Español de Oceanografía: e-IEO Arctic Arctic Ocean Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Arctic cod regime shifts trophic control thresholds |
spellingShingle |
Arctic cod regime shifts trophic control thresholds Llope, M. (Marcos) McGinty, N. Durant, J.M. (Joël M.) Stige, L.C. (Leif Christian) Marteinsdóttir, G. (Gudrún) Stenseth, N.C. (Nils Christian) Cod response to past and current warm phases in the Seas of Iceland, a time series analysis |
topic_facet |
Arctic cod regime shifts trophic control thresholds |
description |
Climate change, and in particular global warming, is already affecting the Arctic and is expected to continue in the near future. A sustainable use the Arctic resources requires an increased understanding of its functioning that helps us anticipate change and adapt to it. Cod time series in Iceland cover a period of more than 50 years. Three distinct phases can be identified over this span of time: (1) the current warm phase characterised by relatively high cod biomasses, (2) an earlier phase (around the 1950s) with similar conditions separated by (3) some 20 years of cold temperatures and low biomasses. The aim of this study is to identify possible regime-dependent dynamics associated to these warm and cold phases that can help us identify key drivers in the current and future warm regime. To do this we compiled a database of fishing pressure, hydrographical and biological (copepods and euphausiids) variables as well as three cod population descriptors: (i) total spawning stock biomass, (ii) the population growth rate derived from matrix population models and (iii) disaggregated number at age time series. These three cod indices were subsequently regressed (GAM and threshold GAM) against the environmental and anthropogenic variables. Our results point out a probable regime-dependent mechanism where plankton effects would only be important for cod under warm conditions. No threshold-like responses were found in the population growth rate nor in the number at age for the various age classes. |
format |
Conference Object |
author |
Llope, M. (Marcos) McGinty, N. Durant, J.M. (Joël M.) Stige, L.C. (Leif Christian) Marteinsdóttir, G. (Gudrún) Stenseth, N.C. (Nils Christian) |
author_facet |
Llope, M. (Marcos) McGinty, N. Durant, J.M. (Joël M.) Stige, L.C. (Leif Christian) Marteinsdóttir, G. (Gudrún) Stenseth, N.C. (Nils Christian) |
author_sort |
Llope, M. (Marcos) |
title |
Cod response to past and current warm phases in the Seas of Iceland, a time series analysis |
title_short |
Cod response to past and current warm phases in the Seas of Iceland, a time series analysis |
title_full |
Cod response to past and current warm phases in the Seas of Iceland, a time series analysis |
title_fullStr |
Cod response to past and current warm phases in the Seas of Iceland, a time series analysis |
title_full_unstemmed |
Cod response to past and current warm phases in the Seas of Iceland, a time series analysis |
title_sort |
cod response to past and current warm phases in the seas of iceland, a time series analysis |
publisher |
Centro Oceanográfico de Cádiz |
publishDate |
2016 |
url |
http://hdl.handle.net/10508/10401 |
op_coverage |
Arctic Ocean |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Arctic Arctic Ocean Gam |
geographic_facet |
Arctic Arctic Ocean Gam |
genre |
Arctic cod Arctic Arctic Ocean Climate change Global warming Iceland Copepods |
genre_facet |
Arctic cod Arctic Arctic Ocean Climate change Global warming Iceland Copepods |
op_relation |
http://hdl.handle.net/10508/10401 ICES Annual Science Conference. (19/09/2016 - 23/09/2016. Riga (Latvia)). today. CM Code: P:178. En: , . |
op_rights |
Atribución-NoComercial 3.0 España Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766304340220313600 |