Spadefoot Pelobates vespertinus (Amphibia, Pelobatidae) as a transmitter of fatty acids from water to land in a forest-steppe floodplain.

Autor: Bashinskiy IW; Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 119071, Leninsky pr. 33, Moscow, Russia. Electronic address: ivbash@mail.ru., Dgebuadze YY; Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 119071, Leninsky pr. 33, Moscow, Russia; Lomonosov Moscow State University, Moscow, Russia., Sushchik NN; Institute of Biophysics, Federal Research Center 'Krasnoyarsk Scientific Center' of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russia; Siberian Federal University, Svobodny av. 79, Krasnoyarsk, 660041, Russia., Osipov VV; State Nature Reserve Privolzhskaya, Lesostep, 440031, Penza, Okruzhnaya 12A, Russia; Saratov Branch of Russian Federal Research Institute of Fisheries and Oceanography, Chernyshevskogo 152, Saratov 410002, Russia., Gladyshev MI; Institute of Biophysics, Federal Research Center 'Krasnoyarsk Scientific Center' of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russia; Siberian Federal University, Svobodny av. 79, Krasnoyarsk, 660041, Russia.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Jun 15; Vol. 877, pp. 162819. Date of Electronic Publication: 2023 Mar 15.
DOI: 10.1016/j.scitotenv.2023.162819
Abstrakt: 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.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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