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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Language: | English |
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Online Access: | https://hdl.handle.net/10037/24478 https://doi.org/10.1016/j.jmarsys.2021.103697 |
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ftunivtroemsoe:oai:munin.uit.no:10037/24478 2023-05-15T15:47:56+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 2021-12-24 https://hdl.handle.net/10037/24478 https://doi.org/10.1016/j.jmarsys.2021.103697 eng eng Elsevier Journal of Marine Systems Weidberg, Santana Hernandez, Renner, Falk‑Petersen, Basedow. Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago. Journal of Marine Systems. 2022;227 FRIDAID 1975219 doi:10.1016/j.jmarsys.2021.103697 0924-7963 1879-1573 https://hdl.handle.net/10037/24478 openAccess Copyright 2022 The Author(s) VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1016/j.jmarsys.2021.103697 2022-03-23T23:58:04Z 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. Article in Journal/Newspaper Calanus finmarchicus Lofoten Northern Norway Copepods University of Tromsø: Munin Open Research Archive Lofoten Norway Journal of Marine Systems 227 103697 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 |
spellingShingle |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::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::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::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. |
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 |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/24478 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_relation |
Journal of Marine Systems Weidberg, Santana Hernandez, Renner, Falk‑Petersen, Basedow. Large scale patches of Calanus finmarchicus and associated hydrographic conditions off the Lofoten archipelago. Journal of Marine Systems. 2022;227 FRIDAID 1975219 doi:10.1016/j.jmarsys.2021.103697 0924-7963 1879-1573 https://hdl.handle.net/10037/24478 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.1016/j.jmarsys.2021.103697 |
container_title |
Journal of Marine Systems |
container_volume |
227 |
container_start_page |
103697 |
_version_ |
1766382911625363456 |