Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea
Arrowworm Saggita elegans is one of the important and abundant species in zooplankton communities of the western Bering Sea. Interannual variability of their biomass is considered on the data of long-term surveys conducted in 1986–2018, the species production is determined for the Anadyr-Navarin reg...
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2021
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ftdoajarticles:oai:doaj.org/article:3cb621047b624625944221811ac7c44a 2023-10-09T21:44:31+02:00 Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea E. P. Dulepova 2021-07-01T00:00:00Z https://doi.org/10.26428/1606-9919-2021-201-425-439 https://doaj.org/article/3cb621047b624625944221811ac7c44a RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/639 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2021-201-425-439 https://doaj.org/article/3cb621047b624625944221811ac7c44a Известия ТИНРО, Vol 201, Iss 2, Pp 425-439 (2021) западная часть берингова моря сагитты sagitta elegans многолетняя динамика трофические связи продукция функционирование планктонных сообществ Aquaculture. Fisheries. Angling SH1-691 article 2021 ftdoajarticles https://doi.org/10.26428/1606-9919-2021-201-425-439 2023-09-10T00:45:29Z Arrowworm Saggita elegans is one of the important and abundant species in zooplankton communities of the western Bering Sea. Interannual variability of their biomass is considered on the data of long-term surveys conducted in 1986–2018, the species production is determined for the Anadyr-Navarin region and deep-water basin in 2008–2018, and the total production of zooplankton communities is calculated for 2008, 2015, and 2018. In the modern period, the biomass of S. elegans has significantly decreased compared to 1990–2000s, with exception of the shallow areas where it is relatively stable. The last decade included two periods with different oceanographic regime: the cold years (2007–2013) and the warm ones (2014–2018), but S. elegans did not demonstrate rapid response to such change of abiotic factors. However, the water circulation patterns in the upper layer were important for them and determined their transport and accumulation. For example, the high abundance and production of arrowworms in the deep-water area in 2008 and in the Anadyr-Navarin region in 2011 were conditioned by their transport and accumulation in these areas. S. elegans are predators, preying mainly upon copepods, so their impact on structure and production of zooplankton community is determined by significant grazing estimated at 50–100 % of Copepoda production or even more. The total production of zooplankton communities was higher in «warm» 2015 and 2018 than in «cold» 2008. The arrowworm production decreased in these warm years but production of non-predatory species (basically small- and medium-sized copepods) increased sharply because of their rapid response to temperature changes realized in high growth rate under higher temperature. Thus, the role of S. elegans in formation of the community production becomes lower in conditions favorable for high growth rate of non-predatory species. Article in Journal/Newspaper Anadyr Anadyr' Bering Sea Берингов* Copepods Directory of Open Access Journals: DOAJ Articles Anadyr ENVELOPE(177.510,177.510,64.734,64.734) Anadyr’ ENVELOPE(176.233,176.233,64.882,64.882) Bering Sea Navarin ENVELOPE(-7.211,-7.211,62.303,62.303) Izvestiya TINRO 201 2 425 439 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
западная часть берингова моря сагитты sagitta elegans многолетняя динамика трофические связи продукция функционирование планктонных сообществ Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
западная часть берингова моря сагитты sagitta elegans многолетняя динамика трофические связи продукция функционирование планктонных сообществ Aquaculture. Fisheries. Angling SH1-691 E. P. Dulepova Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea |
topic_facet |
западная часть берингова моря сагитты sagitta elegans многолетняя динамика трофические связи продукция функционирование планктонных сообществ Aquaculture. Fisheries. Angling SH1-691 |
description |
Arrowworm Saggita elegans is one of the important and abundant species in zooplankton communities of the western Bering Sea. Interannual variability of their biomass is considered on the data of long-term surveys conducted in 1986–2018, the species production is determined for the Anadyr-Navarin region and deep-water basin in 2008–2018, and the total production of zooplankton communities is calculated for 2008, 2015, and 2018. In the modern period, the biomass of S. elegans has significantly decreased compared to 1990–2000s, with exception of the shallow areas where it is relatively stable. The last decade included two periods with different oceanographic regime: the cold years (2007–2013) and the warm ones (2014–2018), but S. elegans did not demonstrate rapid response to such change of abiotic factors. However, the water circulation patterns in the upper layer were important for them and determined their transport and accumulation. For example, the high abundance and production of arrowworms in the deep-water area in 2008 and in the Anadyr-Navarin region in 2011 were conditioned by their transport and accumulation in these areas. S. elegans are predators, preying mainly upon copepods, so their impact on structure and production of zooplankton community is determined by significant grazing estimated at 50–100 % of Copepoda production or even more. The total production of zooplankton communities was higher in «warm» 2015 and 2018 than in «cold» 2008. The arrowworm production decreased in these warm years but production of non-predatory species (basically small- and medium-sized copepods) increased sharply because of their rapid response to temperature changes realized in high growth rate under higher temperature. Thus, the role of S. elegans in formation of the community production becomes lower in conditions favorable for high growth rate of non-predatory species. |
format |
Article in Journal/Newspaper |
author |
E. P. Dulepova |
author_facet |
E. P. Dulepova |
author_sort |
E. P. Dulepova |
title |
Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea |
title_short |
Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea |
title_full |
Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea |
title_fullStr |
Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea |
title_full_unstemmed |
Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea |
title_sort |
role of arrowworm sagitta elegans (chaetognatha) in plankton communities of the western bering sea |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2021 |
url |
https://doi.org/10.26428/1606-9919-2021-201-425-439 https://doaj.org/article/3cb621047b624625944221811ac7c44a |
long_lat |
ENVELOPE(177.510,177.510,64.734,64.734) ENVELOPE(176.233,176.233,64.882,64.882) ENVELOPE(-7.211,-7.211,62.303,62.303) |
geographic |
Anadyr Anadyr’ Bering Sea Navarin |
geographic_facet |
Anadyr Anadyr’ Bering Sea Navarin |
genre |
Anadyr Anadyr' Bering Sea Берингов* Copepods |
genre_facet |
Anadyr Anadyr' Bering Sea Берингов* Copepods |
op_source |
Известия ТИНРО, Vol 201, Iss 2, Pp 425-439 (2021) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/639 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2021-201-425-439 https://doaj.org/article/3cb621047b624625944221811ac7c44a |
op_doi |
https://doi.org/10.26428/1606-9919-2021-201-425-439 |
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Izvestiya TINRO |
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201 |
container_issue |
2 |
container_start_page |
425 |
op_container_end_page |
439 |
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