Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1093/plankt/fbac023

Ключевые слова: lake stechlin, microbial degradation, non-predatory mortality, simulation modeling, sinking velocities, zooplankton carcasses

Аннотация: The contribution of dead zooplankton biomass to carbon cycle in aquatic ecosystems is practically unknown. Using abundance data of zooplankton in water column and dead zooplankton in sediment traps in Lake Stechlin, an ecological-mathematical model was developed to simulate the abundance and sinking of zooplankton carcasses and preПоказать полностьюdict the related release of labile organic matter (LOM) into the water column. We found species-specific differences in mortality rate of the dominant zooplankton: Daphnia cucullata, Bosmina coregoni and Diaphanosoma brachyurum (0.008, 0.129 and 0.020 day-1, respectively) and differences in their carcass sinking velocities in metalimnion (and hypolimnion): 2.1 (7.64), 14.0 (19.5) and 1.1 (5.9) m day-1, respectively. Our model simulating formation and degradation processes of dead zooplankton predicted a bimodal distribution of the released LOM: epilimnic and metalimnic peaks of comparable intensity, ca. 1 mg DW m-3 day-1. Maximum degradation of carcasses up to ca. 1.7 mg DW m-3 day-1 occurred in the density gradient zone of metalimnion. LOM released from zooplankton carcasses into the surrounding water may stimulate microbial activity and facilitate microbial degradation of more refractory organic matter; therefore, dead zooplankton are expected to be an integral part of water column carbon source/sink dynamics in stratified lakes. © 2022 The Author(s) 2022.

Журнал: Journal of Plankton Research

Выпуск журнала: Vol. 44, Is. 3

Номера страниц: 386-400

ISSN журнала: 01427873

Издатель: Oxford University Press

• Tolomeev A.P. (Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Federal Research Center Krasnoyarsk Science Center SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Institute of Fundamental Biology and Biotechnology, Krasnoyarsk, 660041, Russian Federation)
• Dubovskaya O.P. (Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Federal Research Center Krasnoyarsk Science Center SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Institute of Fundamental Biology and Biotechnology, Krasnoyarsk, 660041, Russian Federation)
• Kirillin G. (Department of Ecohydrology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, 12587, Germany)
• Buseva Z. (Scientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources, Minsk, 220072, Belarus)
• Kolmakova O.V. (Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Federal Research Center Krasnoyarsk Science Center SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Institute of Fundamental Biology and Biotechnology, Krasnoyarsk, 660041, Russian Federation)
• Grossart H.-P. (Department of Plankton and Microbial Ecology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Neuglobsow16775, Germany, Institute for Biochemistry and Biology, Potsdam University, Potsdam, 14469, Germany)
• Tang K.W. (Department of Biosciences, Swansea University, Swansea, SA2 8PP, United Kingdom)
• Gladyshev M.I. (Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Federal Research Center Krasnoyarsk Science Center SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Institute of Fundamental Biology and Biotechnology, Krasnoyarsk, 660041, Russian Federation)

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