Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean
Abstract This study investigates the large-scale distribution patterns of the acoustic scattering layers and micronekton density across the Northeast Atlantic Ocean during daylight hours. A research cruise on board R/V “Kronprins Haakon” was conducted during May 2019 from Cape Verde to Bay of Biscay...
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ftdoajarticles:oai:doaj.org/article:7fb93846b56a45f4bf9122a6a0c53a04 2023-05-15T17:33:33+02:00 Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean Eva García-Seoane Thor Klevjer Kjell Arne Mork Mette Dalgaard Agersted Gavin J. Macaulay Webjørn Melle 2023-03-01T00:00:00Z https://doi.org/10.1038/s41598-023-30653-5 https://doaj.org/article/7fb93846b56a45f4bf9122a6a0c53a04 EN eng Nature Portfolio https://doi.org/10.1038/s41598-023-30653-5 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-30653-5 2045-2322 https://doaj.org/article/7fb93846b56a45f4bf9122a6a0c53a04 Scientific Reports, Vol 13, Iss 1, Pp 1-16 (2023) Medicine R Science Q article 2023 ftdoajarticles https://doi.org/10.1038/s41598-023-30653-5 2023-03-26T01:33:19Z Abstract This study investigates the large-scale distribution patterns of the acoustic scattering layers and micronekton density across the Northeast Atlantic Ocean during daylight hours. A research cruise on board R/V “Kronprins Haakon” was conducted during May 2019 from Cape Verde to Bay of Biscay. Hydrological data were obtained at 20 conductivity-temperature-depth sensor (CTD) stations. To estimate the micronekton densities in front of the trawl, an autonomous echo sounder (120 or 200 kHz) on the headrope of the macroplankton trawl was used. Acoustic data were also collected along the cruise track using ship-mounted multi-frequency echo sounders (backscatter at 18 and 38 kHz was analyzed). Acoustic observations (both at 18, 38 and 120/200 kHz) showed clear patterns in the horizontal distribution of the micronekton during daytime with higher backscatter and echo densities in the south of the study area (from 17 to 37° N), and the absence of high backscatter in the surface from 37 to 45° N. Backscatter and echo densities were found to be significantly influenced by: temperature, salinity, and oxygen, as well as depth and time of the day. Article in Journal/Newspaper North Atlantic Northeast Atlantic Directory of Open Access Journals: DOAJ Articles Scientific Reports 13 1 |
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Medicine R Science Q Eva García-Seoane Thor Klevjer Kjell Arne Mork Mette Dalgaard Agersted Gavin J. Macaulay Webjørn Melle Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
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Medicine R Science Q |
description |
Abstract This study investigates the large-scale distribution patterns of the acoustic scattering layers and micronekton density across the Northeast Atlantic Ocean during daylight hours. A research cruise on board R/V “Kronprins Haakon” was conducted during May 2019 from Cape Verde to Bay of Biscay. Hydrological data were obtained at 20 conductivity-temperature-depth sensor (CTD) stations. To estimate the micronekton densities in front of the trawl, an autonomous echo sounder (120 or 200 kHz) on the headrope of the macroplankton trawl was used. Acoustic data were also collected along the cruise track using ship-mounted multi-frequency echo sounders (backscatter at 18 and 38 kHz was analyzed). Acoustic observations (both at 18, 38 and 120/200 kHz) showed clear patterns in the horizontal distribution of the micronekton during daytime with higher backscatter and echo densities in the south of the study area (from 17 to 37° N), and the absence of high backscatter in the surface from 37 to 45° N. Backscatter and echo densities were found to be significantly influenced by: temperature, salinity, and oxygen, as well as depth and time of the day. |
format |
Article in Journal/Newspaper |
author |
Eva García-Seoane Thor Klevjer Kjell Arne Mork Mette Dalgaard Agersted Gavin J. Macaulay Webjørn Melle |
author_facet |
Eva García-Seoane Thor Klevjer Kjell Arne Mork Mette Dalgaard Agersted Gavin J. Macaulay Webjørn Melle |
author_sort |
Eva García-Seoane |
title |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_short |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_full |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_fullStr |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_full_unstemmed |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_sort |
acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° n latitudes in the north atlantic ocean |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41598-023-30653-5 https://doaj.org/article/7fb93846b56a45f4bf9122a6a0c53a04 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
Scientific Reports, Vol 13, Iss 1, Pp 1-16 (2023) |
op_relation |
https://doi.org/10.1038/s41598-023-30653-5 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-30653-5 2045-2322 https://doaj.org/article/7fb93846b56a45f4bf9122a6a0c53a04 |
op_doi |
https://doi.org/10.1038/s41598-023-30653-5 |
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Scientific Reports |
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13 |
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1 |
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1766132086836559872 |