Spadefoot Pelobates vespertinus (Amphibia, Pelobatidae) as a transmitter of fatty acids from water to land in a forest-steppe floodplain : научное издание
Библиографическое описание:Spadefoot Pelobates vespertinus (Amphibia, Pelobatidae) as a transmitter of fatty acids from water to land in a forest-steppe floodplain : научное издание / I. W. Bashinskiy [et al.]. - Текст : непосредственный // Science of the Total Environment. - 2023. - Т. 877, № . - P. 162819. - The authors are grateful to the management of the State nature reserve «Privolzhskaya Lesostep» for help in the organization of field works and samplings. This work was supported by the Russian Science Foundation [grant number 22-24-00920], https://rscf.ru/en/project/22-24-00920/. - ISSN 0048-9697. - ISSN 1879-1026, DOI 10.1016/j.scitotenv.2023.162819.
Аннотация:The transfer of biomass and polyunsaturated fatty acids by the spadefoot P. vespertinus (previously subspecies of P. fuscus) from aquatic to terrestrial ecosystems was studied for five years in small floodplain water bodies of a forest-steppe zone. Average emergence of metamorphs from unit of water area, wet mass was 6.7 g m−2 year−1. A ratio of the emergence to biomass was calculated and represented as E/B coefficient (an analog of P/B production/biomass coefficient). The average E/B was found to be 0.038 year−1. The introduced coefficient can be used for a coarse estimation of the emergence on the basis of tadpole biomass measurements. A considerable partitioning of tadpoles and metamorphs in the composition of fatty acids in their biomass was revealed. Tadpoles had significantly higher mean levels (percent of total fatty acids) of 16:0, 16:1n-9, 18:0, 20:5n-3 and 22:5n-3, while metamorphs had significantly higher levels of 14:0, 15:0, 17:0, 17:1n-8, 18:2n-6, 20:2n-6, 20:4n-6 and 22:5n-6, likely due to the shifting to terrestrial food. Metamorphs had significantly higher content of total fatty acids, mg g−1 of wet weight, and, in spite of lower level, they had significantly higher content of eicosapentaenoic acid (20:5n-3, EPA) than tadpoles. Metamorphs also had significantly higher content of docosahexaenoic acid (22:6n-3, DHA) and sum of EPA + DHA than tadpoles. Average flux of EPA + DHA from unit of water area with metamorphs was 3.27 mg m−2 year−1. The metamorphs appeared to be qualitatively and quantitatively prominent prey for a number of terrestrial consumers.
Издательство:Elsevier Science Publishing Company, Inc.
Источник:Science of the Total Environment
Выпуск:Т. 877
Номера страниц:162819
Держатель оригинала документа:Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, State Nature Reserve Privolzhskaya Lesostep
Количество экземпляров:
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