Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea
Abstract The swap in abundance between two Calanus species in the North Sea during the 1980s constitutes a quintessential example of regime shift, with important ecosystemic and economic repercussions because these copepods constitute a major component of the diet of larval and juvenile cods. It is...
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crwiley:10.1111/gcb.15394 2024-06-02T08:04:43+00:00 Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea Montero, José T. Lima, Mauricio Estay, Sergio A. Rezende, Enrico L. Fondo Nacional de Desarrollo Científico y Tecnológico 2020 http://dx.doi.org/10.1111/gcb.15394 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15394 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15394 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 27, issue 3, page 576-586 ISSN 1354-1013 1365-2486 journal-article 2020 crwiley https://doi.org/10.1111/gcb.15394 2024-05-03T11:25:36Z Abstract The swap in abundance between two Calanus species in the North Sea during the 1980s constitutes a quintessential example of regime shift, with important ecosystemic and economic repercussions because these copepods constitute a major component of the diet of larval and juvenile cods. It is hypothesized that this transition was driven by gradual changes in primary productivity, the North Atlantic Oscillation (NAO) and sea surface temperatures (SST), and yet how these factors contribute to the population dynamics of these two species and the overall regime shift remains unclear. Here, we combine a highly resolved and spatially structured longitudinal dataset with population dynamics theory‐based models to obtain a thorough and more detailed description of populations’ responses to the regime shift observed in the North Sea. Our analyses highlight that this transition exhibits a clear spatial structure and involved a decoupling between the dynamics of Calanus finmarchicus and the NAO in western regions and between Calanus helgolandicus and SST in the eastern regions of the North Sea. Consequently, the observed switch in abundance between these species reflects the interaction between species‐specific attributes, a well‐defined spatial structure with a marked east–west axis and a decoupling between the ecological drivers and Calanus population dynamics following the shift. Succinctly, we suspect that higher water temperatures have favored C. helgolandicus and resulted in restrictive conditions for C. finmarchicus , eventually overshadowing the effects of NAO detected in historical records. Overall, our study illustrates how population dynamics theory can be successfully employed to disentangle the complex and multifactorial nature of a regime shift in response to gradually changing environmental conditions. Article in Journal/Newspaper Calanus finmarchicus North Atlantic North Atlantic oscillation Copepods Wiley Online Library Global Change Biology 27 3 576 586 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract The swap in abundance between two Calanus species in the North Sea during the 1980s constitutes a quintessential example of regime shift, with important ecosystemic and economic repercussions because these copepods constitute a major component of the diet of larval and juvenile cods. It is hypothesized that this transition was driven by gradual changes in primary productivity, the North Atlantic Oscillation (NAO) and sea surface temperatures (SST), and yet how these factors contribute to the population dynamics of these two species and the overall regime shift remains unclear. Here, we combine a highly resolved and spatially structured longitudinal dataset with population dynamics theory‐based models to obtain a thorough and more detailed description of populations’ responses to the regime shift observed in the North Sea. Our analyses highlight that this transition exhibits a clear spatial structure and involved a decoupling between the dynamics of Calanus finmarchicus and the NAO in western regions and between Calanus helgolandicus and SST in the eastern regions of the North Sea. Consequently, the observed switch in abundance between these species reflects the interaction between species‐specific attributes, a well‐defined spatial structure with a marked east–west axis and a decoupling between the ecological drivers and Calanus population dynamics following the shift. Succinctly, we suspect that higher water temperatures have favored C. helgolandicus and resulted in restrictive conditions for C. finmarchicus , eventually overshadowing the effects of NAO detected in historical records. Overall, our study illustrates how population dynamics theory can be successfully employed to disentangle the complex and multifactorial nature of a regime shift in response to gradually changing environmental conditions. |
author2 |
Fondo Nacional de Desarrollo Científico y Tecnológico |
format |
Article in Journal/Newspaper |
author |
Montero, José T. Lima, Mauricio Estay, Sergio A. Rezende, Enrico L. |
spellingShingle |
Montero, José T. Lima, Mauricio Estay, Sergio A. Rezende, Enrico L. Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea |
author_facet |
Montero, José T. Lima, Mauricio Estay, Sergio A. Rezende, Enrico L. |
author_sort |
Montero, José T. |
title |
Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea |
title_short |
Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea |
title_full |
Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea |
title_fullStr |
Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea |
title_full_unstemmed |
Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea |
title_sort |
spatial and temporal shift in the factors affecting the population dynamics of calanus copepods in the north sea |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/gcb.15394 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15394 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15394 |
genre |
Calanus finmarchicus North Atlantic North Atlantic oscillation Copepods |
genre_facet |
Calanus finmarchicus North Atlantic North Atlantic oscillation Copepods |
op_source |
Global Change Biology volume 27, issue 3, page 576-586 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.15394 |
container_title |
Global Change Biology |
container_volume |
27 |
container_issue |
3 |
container_start_page |
576 |
op_container_end_page |
586 |
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1800749366833577984 |