Effects of Macrobiota on the Transfer Efficiency of Essential Elements and Fatty Acids From Phytoplankton to Zooplankton Under Eutrophic Conditions


Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.3389/fenvs.2021.739014

Ключевые слова: fish, food quality, nitrogen, phosphorus, zebra mussels

Аннотация: The transfer pathways of organic matter and elements from phytoplankton to zooplankton in freshwater ecosystems are important for understanding how aquatic ecosystems function. We conducted a mesocosm experiment to determine how fish and zebra mussels altered the transfer efficiencies of essential substances including carbon (C), pПоказать полностьюolyunsaturated fatty acids (PUFAs), total fatty acids (FAs), phosphorus (P), and nitrogen (N) from phytoplankton to zooplankton. We assessed the transfer efficiencies of the essential substances from phytoplankton to zooplankton as the ratio of their zooplankton production (P) per unit of biomass (B) to that of phytoplankton to exclude grazing or predation effects. We hypothesized that zebra mussels and fish would affect the transfer of materials from phytoplankton to zooplankton by altering the contents of essential elements and FAs in phytoplankton and zooplankton communities and/or due to shifts in the planktonic community structure mediated by grazing and/or predation. Fish increased the transfer efficiencies of eicosapentaenoic acid 20:5 ω-3 (EPA), docosahexaenoic acid 22:6 ω-3 (DHA), and P relative to the control. We speculated that fish weakened the control of zooplankton over algal assemblage by selectively feeding on larger cladocerans such as Daphnia. Therefore, fish can increase the relative proportion of high-quality food for zooplankton, improving food conditions for the available zooplankton. In contrast, zebra mussels reduced the transfer efficiencies of EPA and DHA relative to the control treatment likely due to competition with zooplankton for PUFA-rich food particles. However, zebra mussels did not have any impact on the transfer efficiencies of C, total FAs, N, and P. EPA, DHA, and P were transferred more efficiently than C from phytoplankton to zooplankton, while total FAs, which are commonly used as an energetic source, were transferred as efficiently as C. The enrichment of consumers with the most important substances relative to their basal food sources creates the potential for the successful transport of these substances across aquatic trophic webs. © Copyright © 2021 Feniova, Karpowicz, Gladyshev, Sushchik, Petrosyan, Sakharova and Dzialowski.

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Журнал: Frontiers in Environmental Science

Выпуск журнала: Vol. 9

Номера страниц: 739014

ISSN журнала: 2296665X

Издатель: Frontiers Media S.A.


  • Feniova Irina Yu (Russian Acad Sci, Inst Ecol & Evolut, Moscow, Russia)
  • Karpowicz Maciej (Univ Bialystok, Fac Biol, Dept HydroBiol, Bialystok, Poland)
  • Gladyshev Michail I. (Russian Acad Sci, Inst Biophys Fed Res Ctr, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia; Siberian Fed Univ, Chair Aquat & Terr Ecosyst, Krasnoyarsk, Russia)
  • Sushchik Nadezhda N. (Russian Acad Sci, Inst Biophys Fed Res Ctr, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia; Siberian Fed Univ, Chair Aquat & Terr Ecosyst, Krasnoyarsk, Russia)
  • Petrosyan Varos G. (Russian Acad Sci, Inst Ecol & Evolut, Moscow, Russia)
  • Sakharova Ekaterina G. (Russian Acad Sci, Papanin Inst Biol Inland Waters, Borok, Russia)
  • Dzialowski Andrew R. (Oklahoma State Univ, Dept Integrat Biol, Stillwater, OK 74078 USA)