Spatial contraction of demersal fish populations in a large marine ecosystem
Aim: The interdependencies between trophic interactions, environmental factors and anthropogenic forcing determine how species distributions change over time. Large changes in species distributions have occurred as a result of climate change. The objective of this study was to analyse how the spatia...
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Wiley-Blackwell
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ftoceanrep:oai:oceanrep.geomar.de:45776 2023-05-15T16:19:24+02:00 Spatial contraction of demersal fish populations in a large marine ecosystem Orio, Alessandro Bergström, Ulf Florin, Ann-Britt Lehmann, Andreas Šics, Ivo Casini, Michele 2019-03 text https://oceanrep.geomar.de/id/eprint/45776/ https://oceanrep.geomar.de/id/eprint/45776/1/Orio_et_al-2019-Journal_of_Biogeography.pdf https://doi.org/10.1111/jbi.13510 en eng Wiley-Blackwell https://oceanrep.geomar.de/id/eprint/45776/1/Orio_et_al-2019-Journal_of_Biogeography.pdf Orio, A. , Bergström, U., Florin, A. B., Lehmann, A., Šics, I. and Casini, M. (2019) Spatial contraction of demersal fish populations in a large marine ecosystem. Journal of Biogeography, 46 (3). pp. 633-645. DOI 10.1111/jbi.13510 <https://doi.org/10.1111/jbi.13510>. doi:10.1111/jbi.13510 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1111/jbi.13510 2023-04-07T15:43:41Z Aim: The interdependencies between trophic interactions, environmental factors and anthropogenic forcing determine how species distributions change over time. Large changes in species distributions have occurred as a result of climate change. The objective of this study was to analyse how the spatial distribution of cod and flounder has changed in the Baltic Sea during the past four decades characterized by large hydrological changes. Location: Baltic Sea. Taxon: Cod (Gadus morhua) and flounder (Platichthys flesus). Methods: Catch per unit of effort (CPUE) data for adult and juvenile cod and for adult flounder were modelled using Delta-Generalized additive models including environmental and geographical variables between 1979 and 2016. From the annual CPUE predictions for each species, yearly distribution maps and depth distribution curves were obtained. Mean depth and the depth range were estimated to provide an indication on preferred depth and habitat occupancy. Results: Adult and juvenile cod showed a contraction in their distribution in the southern areas of the Baltic Sea. Flounder, instead, showed an expansion in its distribution with an increase in abundance in the northern areas. The depth distributions showed a progressive shift of the mean depth of occurrence towards shallower waters for adult cod and flounder and towards deeper waters for juvenile cod, as well as a contraction of the species depth ranges, evident mainly from the late 1980s. Main conclusions: Our study illustrates large changes in the spatial distribution of cod and flounder in the Baltic Sea. The changes in depth distribution occurred from the late 1980s are probably due to a combination of expanded areas of hypoxia in deep waters and an increase in predation risk in shallow waters. The net effect of these changes is an increased spatial overlap between life stages and species, which may amplify cod cannibalism and the interaction strength between cod and flounder Article in Journal/Newspaper Gadus morhua OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Biogeography 46 3 633 645 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Aim: The interdependencies between trophic interactions, environmental factors and anthropogenic forcing determine how species distributions change over time. Large changes in species distributions have occurred as a result of climate change. The objective of this study was to analyse how the spatial distribution of cod and flounder has changed in the Baltic Sea during the past four decades characterized by large hydrological changes. Location: Baltic Sea. Taxon: Cod (Gadus morhua) and flounder (Platichthys flesus). Methods: Catch per unit of effort (CPUE) data for adult and juvenile cod and for adult flounder were modelled using Delta-Generalized additive models including environmental and geographical variables between 1979 and 2016. From the annual CPUE predictions for each species, yearly distribution maps and depth distribution curves were obtained. Mean depth and the depth range were estimated to provide an indication on preferred depth and habitat occupancy. Results: Adult and juvenile cod showed a contraction in their distribution in the southern areas of the Baltic Sea. Flounder, instead, showed an expansion in its distribution with an increase in abundance in the northern areas. The depth distributions showed a progressive shift of the mean depth of occurrence towards shallower waters for adult cod and flounder and towards deeper waters for juvenile cod, as well as a contraction of the species depth ranges, evident mainly from the late 1980s. Main conclusions: Our study illustrates large changes in the spatial distribution of cod and flounder in the Baltic Sea. The changes in depth distribution occurred from the late 1980s are probably due to a combination of expanded areas of hypoxia in deep waters and an increase in predation risk in shallow waters. The net effect of these changes is an increased spatial overlap between life stages and species, which may amplify cod cannibalism and the interaction strength between cod and flounder |
format |
Article in Journal/Newspaper |
author |
Orio, Alessandro Bergström, Ulf Florin, Ann-Britt Lehmann, Andreas Šics, Ivo Casini, Michele |
spellingShingle |
Orio, Alessandro Bergström, Ulf Florin, Ann-Britt Lehmann, Andreas Šics, Ivo Casini, Michele Spatial contraction of demersal fish populations in a large marine ecosystem |
author_facet |
Orio, Alessandro Bergström, Ulf Florin, Ann-Britt Lehmann, Andreas Šics, Ivo Casini, Michele |
author_sort |
Orio, Alessandro |
title |
Spatial contraction of demersal fish populations in a large marine ecosystem |
title_short |
Spatial contraction of demersal fish populations in a large marine ecosystem |
title_full |
Spatial contraction of demersal fish populations in a large marine ecosystem |
title_fullStr |
Spatial contraction of demersal fish populations in a large marine ecosystem |
title_full_unstemmed |
Spatial contraction of demersal fish populations in a large marine ecosystem |
title_sort |
spatial contraction of demersal fish populations in a large marine ecosystem |
publisher |
Wiley-Blackwell |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/45776/ https://oceanrep.geomar.de/id/eprint/45776/1/Orio_et_al-2019-Journal_of_Biogeography.pdf https://doi.org/10.1111/jbi.13510 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
https://oceanrep.geomar.de/id/eprint/45776/1/Orio_et_al-2019-Journal_of_Biogeography.pdf Orio, A. , Bergström, U., Florin, A. B., Lehmann, A., Šics, I. and Casini, M. (2019) Spatial contraction of demersal fish populations in a large marine ecosystem. Journal of Biogeography, 46 (3). pp. 633-645. DOI 10.1111/jbi.13510 <https://doi.org/10.1111/jbi.13510>. doi:10.1111/jbi.13510 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/jbi.13510 |
container_title |
Journal of Biogeography |
container_volume |
46 |
container_issue |
3 |
container_start_page |
633 |
op_container_end_page |
645 |
_version_ |
1766005780797980672 |