TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S
New data on matter and energy transfer between major components of the Okhotsk Sea ecosystem are obtained on the base of trophodynamic modeling, taking into consideration their production and food consumption rates. The main trophodynamic relationships in the pelagic and bottom communities are deter...
Published in: | Izvestiya TINRO |
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Format: | Article in Journal/Newspaper |
Language: | Russian |
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2019
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Online Access: | https://doi.org/10.26428/1606-9919-2019-198-143-163 https://doaj.org/article/19557e6f360541ceb1f3581c65ff0b00 |
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ftdoajarticles:oai:doaj.org/article:19557e6f360541ceb1f3581c65ff0b00 2023-10-09T21:54:58+02:00 TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S K. M. Gorbatenko I. V. Melnikov 2019-09-01T00:00:00Z https://doi.org/10.26428/1606-9919-2019-198-143-163 https://doaj.org/article/19557e6f360541ceb1f3581c65ff0b00 RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/497 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2019-198-143-163 https://doaj.org/article/19557e6f360541ceb1f3581c65ff0b00 Известия ТИНРО, Vol 198, Iss 3, Pp 143-163 (2019) трофодинамические связи эпипелагиаль зоопланктон нектон охотское море Aquaculture. Fisheries. Angling SH1-691 article 2019 ftdoajarticles https://doi.org/10.26428/1606-9919-2019-198-143-163 2023-09-10T00:41:26Z New data on matter and energy transfer between major components of the Okhotsk Sea ecosystem are obtained on the base of trophodynamic modeling, taking into consideration their production and food consumption rates. The main trophodynamic relationships in the pelagic and bottom communities are determined from observations on zooplankton and nekton abundance, organic carbon content, food habits of marine organisms, and their isotope composition in 2000–2014. The total zooplankton production in the entire Okhotsk Sea in these years is assessed as 2616 . 106 t in raw weight, including 2275 . 106 t for non-predatory plankton, and 341 . 106 t for predatory plankton. So high total production of zooplankton is conditioned by favorable environmental conditions and dominance of high-productive species. Taking into account the rate of zooplankton consumption by predators, only 22.4 % of the total annual zooplankton production was consumed annually, with 16.2 % grazed by predatory plankton and 6.2 % by nekton. In carbon units, 831.0 . 106 tC was produced annually in the Okhotsk Sea at the first trophic level, 177.4 . 106 tC at the second trophic level, 18.1 . 106 tC at the third trophic level, 0.74 . 106 tC at the fourth trophic level, and 0.016 . 106 tC at the fifth trophic level. Pelagic nekton consumed 159 . 106 tC annually. The nekton prey included 85.5 % of zooplankton, 12.8 % of nekton, and 1.7 % of zoobenthos, by biomass. The main part of zooplankton consumed by nekton (50.7 %) was grazed by walleye pollock, 18.9 % by herring, 16.6 % by squids, 7.6 % by capelin, 5.3 % by deep-sea smelt, and 0.9 % by salmons. The total annual production of organisms in the epipelagic layer of the Okhotsk Sea exceeded 109 tons of C (1027.4 . 106 tC/year equal to the biomass of 17.85 . 109 t in wet weight). Primary production is estimated as 67.60 % of gross production in carbon units, microheterotrophic organisms produce 13.30 %, dominant zooplankton groups — 18.60 % (copepods 11.40 %, euphausiids 5.50 %, sagittas 1.20 %, and ... Article in Journal/Newspaper okhotsk sea Copepods Directory of Open Access Journals: DOAJ Articles Okhotsk Izvestiya TINRO 198 143 163 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
трофодинамические связи эпипелагиаль зоопланктон нектон охотское море Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
трофодинамические связи эпипелагиаль зоопланктон нектон охотское море Aquaculture. Fisheries. Angling SH1-691 K. M. Gorbatenko I. V. Melnikov TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S |
topic_facet |
трофодинамические связи эпипелагиаль зоопланктон нектон охотское море Aquaculture. Fisheries. Angling SH1-691 |
description |
New data on matter and energy transfer between major components of the Okhotsk Sea ecosystem are obtained on the base of trophodynamic modeling, taking into consideration their production and food consumption rates. The main trophodynamic relationships in the pelagic and bottom communities are determined from observations on zooplankton and nekton abundance, organic carbon content, food habits of marine organisms, and their isotope composition in 2000–2014. The total zooplankton production in the entire Okhotsk Sea in these years is assessed as 2616 . 106 t in raw weight, including 2275 . 106 t for non-predatory plankton, and 341 . 106 t for predatory plankton. So high total production of zooplankton is conditioned by favorable environmental conditions and dominance of high-productive species. Taking into account the rate of zooplankton consumption by predators, only 22.4 % of the total annual zooplankton production was consumed annually, with 16.2 % grazed by predatory plankton and 6.2 % by nekton. In carbon units, 831.0 . 106 tC was produced annually in the Okhotsk Sea at the first trophic level, 177.4 . 106 tC at the second trophic level, 18.1 . 106 tC at the third trophic level, 0.74 . 106 tC at the fourth trophic level, and 0.016 . 106 tC at the fifth trophic level. Pelagic nekton consumed 159 . 106 tC annually. The nekton prey included 85.5 % of zooplankton, 12.8 % of nekton, and 1.7 % of zoobenthos, by biomass. The main part of zooplankton consumed by nekton (50.7 %) was grazed by walleye pollock, 18.9 % by herring, 16.6 % by squids, 7.6 % by capelin, 5.3 % by deep-sea smelt, and 0.9 % by salmons. The total annual production of organisms in the epipelagic layer of the Okhotsk Sea exceeded 109 tons of C (1027.4 . 106 tC/year equal to the biomass of 17.85 . 109 t in wet weight). Primary production is estimated as 67.60 % of gross production in carbon units, microheterotrophic organisms produce 13.30 %, dominant zooplankton groups — 18.60 % (copepods 11.40 %, euphausiids 5.50 %, sagittas 1.20 %, and ... |
format |
Article in Journal/Newspaper |
author |
K. M. Gorbatenko I. V. Melnikov |
author_facet |
K. M. Gorbatenko I. V. Melnikov |
author_sort |
K. M. Gorbatenko |
title |
TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S |
title_short |
TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S |
title_full |
TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S |
title_fullStr |
TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S |
title_full_unstemmed |
TROPHODYNAMICS OF MARINE ORGANISMS IN THE EPIPELAGIC LAYER OF THE OKHOTSK SEA IN 2000S |
title_sort |
trophodynamics of marine organisms in the epipelagic layer of the okhotsk sea in 2000s |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2019 |
url |
https://doi.org/10.26428/1606-9919-2019-198-143-163 https://doaj.org/article/19557e6f360541ceb1f3581c65ff0b00 |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
okhotsk sea Copepods |
genre_facet |
okhotsk sea Copepods |
op_source |
Известия ТИНРО, Vol 198, Iss 3, Pp 143-163 (2019) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/497 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2019-198-143-163 https://doaj.org/article/19557e6f360541ceb1f3581c65ff0b00 |
op_doi |
https://doi.org/10.26428/1606-9919-2019-198-143-163 |
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Izvestiya TINRO |
container_volume |
198 |
container_start_page |
143 |
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163 |
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1779318748531916800 |