Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago
Large swarms of individuals at different spatiotemporal scales characterise the distributions of many animal species. In the ocean several mesozooplankton taxa aggregate in large patches or swarms driven by active behavioural responses to hydrographic structures, although intrinsic biotic characteri...
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Online Access: | https://hdl.handle.net/11250/2838168 https://doi.org/10.1016/j.jmarsys.2021.103697 |
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ftimr:oai:imr.brage.unit.no:11250/2838168 2023-05-15T15:47:55+02:00 Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago Weidberg, Nicholas Santana Hernandez, Nestor Renner, Angelika Falk‑Petersen, Stig Basedow, Sünnje Linnéa 2022 application/pdf https://hdl.handle.net/11250/2838168 https://doi.org/10.1016/j.jmarsys.2021.103697 eng eng Norges forskningsråd: 268391 urn:issn:0924-7963 https://hdl.handle.net/11250/2838168 https://doi.org/10.1016/j.jmarsys.2021.103697 cristin:1975219 227 Journal of Marine Systems VDP::Oseanografi: 452 VDP::Oceanography: 452 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1016/j.jmarsys.2021.103697 2022-01-26T23:38:54Z Large swarms of individuals at different spatiotemporal scales characterise the distributions of many animal species. In the ocean several mesozooplankton taxa aggregate in large patches or swarms driven by active behavioural responses to hydrographic structures, although intrinsic biotic characteristics of species´ life cycles not related with the environment can also affect spatial distributions. To understand the mechanisms of aggregation and disentangle environmental and pure spatial effects contributing to patch formation, we extensively sampled a large Calanus finmarchicus patch off the Lofoten islands, northern Norway, in spring 2017 by means of Laser Optical Plankton Counter (LOPC) cross shelf transects and biophysical samplings at fixed stations. We observed a clear association between the buoyant layer of the fresh, cold Norwegian Coastal Current (NCC) and high surface copepod abundances. Off shelf lateral displacements of the NCC along its path may retain copepods from the offshore basins. At deeper layers, copepod abundances increased markedly at regions with low sea level anomalies and reduced vertical flows. Our results also suggest that copepods performed short range diel vertical migration within the patch. Potential future changes in the seasonality and structure of the NCC and their impact on swarm occurrence and formation are discussed. publishedVersion Article in Journal/Newspaper Calanus finmarchicus Lofoten Northern Norway Copepods Institute for Marine Research: Brage IMR Lofoten Norway Journal of Marine Systems 227 103697 |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
VDP::Oseanografi: 452 VDP::Oceanography: 452 |
spellingShingle |
VDP::Oseanografi: 452 VDP::Oceanography: 452 Weidberg, Nicholas Santana Hernandez, Nestor Renner, Angelika Falk‑Petersen, Stig Basedow, Sünnje Linnéa Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago |
topic_facet |
VDP::Oseanografi: 452 VDP::Oceanography: 452 |
description |
Large swarms of individuals at different spatiotemporal scales characterise the distributions of many animal species. In the ocean several mesozooplankton taxa aggregate in large patches or swarms driven by active behavioural responses to hydrographic structures, although intrinsic biotic characteristics of species´ life cycles not related with the environment can also affect spatial distributions. To understand the mechanisms of aggregation and disentangle environmental and pure spatial effects contributing to patch formation, we extensively sampled a large Calanus finmarchicus patch off the Lofoten islands, northern Norway, in spring 2017 by means of Laser Optical Plankton Counter (LOPC) cross shelf transects and biophysical samplings at fixed stations. We observed a clear association between the buoyant layer of the fresh, cold Norwegian Coastal Current (NCC) and high surface copepod abundances. Off shelf lateral displacements of the NCC along its path may retain copepods from the offshore basins. At deeper layers, copepod abundances increased markedly at regions with low sea level anomalies and reduced vertical flows. Our results also suggest that copepods performed short range diel vertical migration within the patch. Potential future changes in the seasonality and structure of the NCC and their impact on swarm occurrence and formation are discussed. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Weidberg, Nicholas Santana Hernandez, Nestor Renner, Angelika Falk‑Petersen, Stig Basedow, Sünnje Linnéa |
author_facet |
Weidberg, Nicholas Santana Hernandez, Nestor Renner, Angelika Falk‑Petersen, Stig Basedow, Sünnje Linnéa |
author_sort |
Weidberg, Nicholas |
title |
Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago |
title_short |
Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago |
title_full |
Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago |
title_fullStr |
Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago |
title_full_unstemmed |
Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago |
title_sort |
large scale patches of calanus finmarchicus and associated hydrographic conditions off the lofoten archipelago |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/2838168 https://doi.org/10.1016/j.jmarsys.2021.103697 |
geographic |
Lofoten Norway |
geographic_facet |
Lofoten Norway |
genre |
Calanus finmarchicus Lofoten Northern Norway Copepods |
genre_facet |
Calanus finmarchicus Lofoten Northern Norway Copepods |
op_source |
227 Journal of Marine Systems |
op_relation |
Norges forskningsråd: 268391 urn:issn:0924-7963 https://hdl.handle.net/11250/2838168 https://doi.org/10.1016/j.jmarsys.2021.103697 cristin:1975219 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2021.103697 |
container_title |
Journal of Marine Systems |
container_volume |
227 |
container_start_page |
103697 |
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1766382885720293376 |