Stable isotope analyses of the pelagic food web in Lake Baikal
Stable isotope ratios of various organisms were analyzed to elucidate food web structure in the pelagic zone of Lake Baikal. The pelagic food web of Lake Baikal is simple and consists of five major ecological groups: phytoplankton ( Aulacoseira baicalensis ), mesozooplankton ( Epischura baicalensis...
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crwiley:10.4319/lo.1999.44.3.0502 2024-09-15T18:02:51+00:00 Stable isotope analyses of the pelagic food web in Lake Baikal Yoshii, Koichi Melnik, Natalia G. Timoshkin, Oleg A. Bondarenko, Nina A. Anoshko, Pavel N. Yoshioka, Takahito Wada, Eitaro 1999 http://dx.doi.org/10.4319/lo.1999.44.3.0502 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1999.44.3.0502 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1999.44.3.0502 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 44, issue 3, page 502-511 ISSN 0024-3590 1939-5590 journal-article 1999 crwiley https://doi.org/10.4319/lo.1999.44.3.0502 2024-08-06T04:20:09Z Stable isotope ratios of various organisms were analyzed to elucidate food web structure in the pelagic zone of Lake Baikal. The pelagic food web of Lake Baikal is simple and consists of five major ecological groups: phytoplankton ( Aulacoseira baicalensis ), mesozooplankton ( Epischura baicalensis ), macrozooplankton amphipod ( Macrohectopus branickii ), fish ( Coregonus autumnalis migratorius and four species of cottoid fishes), and seal ( Phoca sibirica ). Because of the low diversity and consequently small number of possible diets for each species, we were able to quantitatively estimate the diet composition of each animal with stable isotopes. Our carbon isotope data indicated that pelagic phytoplankton are the primary carbon source of the pelagic food web because δ 13 C levels of animals were close to those of pelagic phytoplankton. The δ 15 N levels of animals showed a clear trend of stepwise enrichment with trophic level according to the following equation: δ 15 N (‰) = 3.3 (Trophic Level – 1) – 3.8. In addition to interspecific food web analysis, important pelagic animals, such as M. branickii , two species of pelagic sculpin, C. autumnalis migratorius, and P. sibirica, were also examined, with emphasis on ontogenic diet changes. δ 15 N levels of M. branickii and sculpins increased with body length, suggesting a change in feeding habits during growth. We demonstrate that carbon and nitrogen stable isotopes can be successfully applied to elucidate trophic relationships and conclude that the pelagic food web of Lake Baikal has an ideal, isotopically ordered structure. Article in Journal/Newspaper Coregonus autumnalis Wiley Online Library Limnology and Oceanography 44 3 502 511 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Stable isotope ratios of various organisms were analyzed to elucidate food web structure in the pelagic zone of Lake Baikal. The pelagic food web of Lake Baikal is simple and consists of five major ecological groups: phytoplankton ( Aulacoseira baicalensis ), mesozooplankton ( Epischura baicalensis ), macrozooplankton amphipod ( Macrohectopus branickii ), fish ( Coregonus autumnalis migratorius and four species of cottoid fishes), and seal ( Phoca sibirica ). Because of the low diversity and consequently small number of possible diets for each species, we were able to quantitatively estimate the diet composition of each animal with stable isotopes. Our carbon isotope data indicated that pelagic phytoplankton are the primary carbon source of the pelagic food web because δ 13 C levels of animals were close to those of pelagic phytoplankton. The δ 15 N levels of animals showed a clear trend of stepwise enrichment with trophic level according to the following equation: δ 15 N (‰) = 3.3 (Trophic Level – 1) – 3.8. In addition to interspecific food web analysis, important pelagic animals, such as M. branickii , two species of pelagic sculpin, C. autumnalis migratorius, and P. sibirica, were also examined, with emphasis on ontogenic diet changes. δ 15 N levels of M. branickii and sculpins increased with body length, suggesting a change in feeding habits during growth. We demonstrate that carbon and nitrogen stable isotopes can be successfully applied to elucidate trophic relationships and conclude that the pelagic food web of Lake Baikal has an ideal, isotopically ordered structure. |
format |
Article in Journal/Newspaper |
author |
Yoshii, Koichi Melnik, Natalia G. Timoshkin, Oleg A. Bondarenko, Nina A. Anoshko, Pavel N. Yoshioka, Takahito Wada, Eitaro |
spellingShingle |
Yoshii, Koichi Melnik, Natalia G. Timoshkin, Oleg A. Bondarenko, Nina A. Anoshko, Pavel N. Yoshioka, Takahito Wada, Eitaro Stable isotope analyses of the pelagic food web in Lake Baikal |
author_facet |
Yoshii, Koichi Melnik, Natalia G. Timoshkin, Oleg A. Bondarenko, Nina A. Anoshko, Pavel N. Yoshioka, Takahito Wada, Eitaro |
author_sort |
Yoshii, Koichi |
title |
Stable isotope analyses of the pelagic food web in Lake Baikal |
title_short |
Stable isotope analyses of the pelagic food web in Lake Baikal |
title_full |
Stable isotope analyses of the pelagic food web in Lake Baikal |
title_fullStr |
Stable isotope analyses of the pelagic food web in Lake Baikal |
title_full_unstemmed |
Stable isotope analyses of the pelagic food web in Lake Baikal |
title_sort |
stable isotope analyses of the pelagic food web in lake baikal |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.4319/lo.1999.44.3.0502 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1999.44.3.0502 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1999.44.3.0502 |
genre |
Coregonus autumnalis |
genre_facet |
Coregonus autumnalis |
op_source |
Limnology and Oceanography volume 44, issue 3, page 502-511 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1999.44.3.0502 |
container_title |
Limnology and Oceanography |
container_volume |
44 |
container_issue |
3 |
container_start_page |
502 |
op_container_end_page |
511 |
_version_ |
1810440256011370496 |