Large versus small zooplankton in relation to temperature in the Arctic shelf region
Climate change results in the alteration of the size structure of plankton, which consequently may affect higher trophic levels, such as planktivorous seabirds. In this study Laser Optical Plankton Counter measurements were performed over seven summer seasons (2010–2016) to test the ratio of large v...
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Norwegian Polar Institute
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ftjpolarres:oai:journals.openacademia.net:article/2629 2023-05-15T13:16:15+02:00 Large versus small zooplankton in relation to temperature in the Arctic shelf region Balazy, Kaja Trudnowska, Emilia Wichorowski, Marcin Błachowiak-Samołyk, Katarzyna 2018-02-12 application/pdf application/xml https://polarresearch.net/index.php/polar/article/view/2629 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2629/6015 https://polarresearch.net/index.php/polar/article/view/2629/6016 https://polarresearch.net/index.php/polar/article/view/2629 Polar Research; Vol 37 (2018) 1751-8369 Calanus LOPC polar front little auk Alle alle global warming info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftjpolarres 2021-11-11T19:13:09Z Climate change results in the alteration of the size structure of plankton, which consequently may affect higher trophic levels, such as planktivorous seabirds. In this study Laser Optical Plankton Counter measurements were performed over seven summer seasons (2010–2016) to test the ratio of large versus small zooplankton in relation to environmental conditions. Investigated transects were repeated during the same time of the year (July/August) in different zones of the West Spitsbergen Shelf crossing the Arctic front. The plankton particles were grouped into two size fractions: “Calanus”, potentially consisting of a majority of the high-energetic, older life stages of the preferred prey for little auk (Alle alle) and the “small” fraction including less preferred items. The vertical availability of the Calanus fraction was tested on the background of usually abundant smaller zooplankton, which may hinder the detection of larger zooplankters by little auk. Larger zooplankton were found closer to the coast, in the upper 20-m depth layer in years characterized by significantly lower mean temperatures. Potential availability of prey for the little auk thus could be higher in colder years than in warmer years. Additionally, our study indicated the tendency of the small plankton fraction to concentrate near the locations of the highest chlorophyll fluorescence, in the 20–30-m water layer. The high spatial and temporal resolution of the data indicated a variation in the proportion of large versus small zooplankton, and thus in the availability of Calanus to little auk with respect to temperature. Article in Journal/Newspaper Alle alle Arctic Climate change Global warming little auk Polar Research Zooplankton Spitsbergen Polar Research (E-Journal) Arctic |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Calanus LOPC polar front little auk Alle alle global warming |
spellingShingle |
Calanus LOPC polar front little auk Alle alle global warming Balazy, Kaja Trudnowska, Emilia Wichorowski, Marcin Błachowiak-Samołyk, Katarzyna Large versus small zooplankton in relation to temperature in the Arctic shelf region |
topic_facet |
Calanus LOPC polar front little auk Alle alle global warming |
description |
Climate change results in the alteration of the size structure of plankton, which consequently may affect higher trophic levels, such as planktivorous seabirds. In this study Laser Optical Plankton Counter measurements were performed over seven summer seasons (2010–2016) to test the ratio of large versus small zooplankton in relation to environmental conditions. Investigated transects were repeated during the same time of the year (July/August) in different zones of the West Spitsbergen Shelf crossing the Arctic front. The plankton particles were grouped into two size fractions: “Calanus”, potentially consisting of a majority of the high-energetic, older life stages of the preferred prey for little auk (Alle alle) and the “small” fraction including less preferred items. The vertical availability of the Calanus fraction was tested on the background of usually abundant smaller zooplankton, which may hinder the detection of larger zooplankters by little auk. Larger zooplankton were found closer to the coast, in the upper 20-m depth layer in years characterized by significantly lower mean temperatures. Potential availability of prey for the little auk thus could be higher in colder years than in warmer years. Additionally, our study indicated the tendency of the small plankton fraction to concentrate near the locations of the highest chlorophyll fluorescence, in the 20–30-m water layer. The high spatial and temporal resolution of the data indicated a variation in the proportion of large versus small zooplankton, and thus in the availability of Calanus to little auk with respect to temperature. |
format |
Article in Journal/Newspaper |
author |
Balazy, Kaja Trudnowska, Emilia Wichorowski, Marcin Błachowiak-Samołyk, Katarzyna |
author_facet |
Balazy, Kaja Trudnowska, Emilia Wichorowski, Marcin Błachowiak-Samołyk, Katarzyna |
author_sort |
Balazy, Kaja |
title |
Large versus small zooplankton in relation to temperature in the Arctic shelf region |
title_short |
Large versus small zooplankton in relation to temperature in the Arctic shelf region |
title_full |
Large versus small zooplankton in relation to temperature in the Arctic shelf region |
title_fullStr |
Large versus small zooplankton in relation to temperature in the Arctic shelf region |
title_full_unstemmed |
Large versus small zooplankton in relation to temperature in the Arctic shelf region |
title_sort |
large versus small zooplankton in relation to temperature in the arctic shelf region |
publisher |
Norwegian Polar Institute |
publishDate |
2018 |
url |
https://polarresearch.net/index.php/polar/article/view/2629 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Alle alle Arctic Climate change Global warming little auk Polar Research Zooplankton Spitsbergen |
genre_facet |
Alle alle Arctic Climate change Global warming little auk Polar Research Zooplankton Spitsbergen |
op_source |
Polar Research; Vol 37 (2018) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2629/6015 https://polarresearch.net/index.php/polar/article/view/2629/6016 https://polarresearch.net/index.php/polar/article/view/2629 |
_version_ |
1766273212223586304 |