Grazing rate and feeding selectivity of small and large bodied cladocerans in waters from lakes with different salinity and phytoplankton structure

Zadereev, Egor; Lopatina, Tatiana S.; Ovchinnikov, Svyatoslav; Толомеев, А. П.

doi:10.1007/s00343-022-2158-2

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…Mesozooplankton seems to be a more important control of small phytoplankton forms (Acevedo-Trejos, Marañón, and Merico 2018). Daphnids are size-selective, grazing on phytoplankton with a size smaller than their gape, i.e., with a diameter of < 20 or 30 µm, depending on the species (Sommer et al 2002; Zadereev et al 2023). Calanoids and cyclopoids show differences in their feeding behaviour, with cyclopoids preying mostly on large particles, while calanoids consuming smaller particles (Burkholder and Glibert 2024).…”

Section: Discussionmentioning

confidence: 99%

Automated plankton monitoring suggests a key role of microzooplankton and temperature for predicting dynamics of phytoplankton size classes

Merkli,

Merz,

Reyes

et al. 2024

Preprint

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The interplay between abiotic (resource supply, temperature) and biotic (herbivore grazing) factors determines growth and loss processes in phytoplankton through resource competition and trophic interactions, which are mediated by morphological traits like size. Here, we study the relative importance of different grazers, water physics and chemistry on the daily net accumulation rates (AR) of six phytoplankton size classes, obtained by grouping individual organisms from natural communities based on their realised dimensions. Using a Random Forest modelling approach and four years of daily underwater imaging data, we find that the AR of small phytoplankton is mostly predicted by water temperature and herbivore grazing whereas, with increasing size, resources become more important in predicting ARs. Our results show that microzooplankton is an important predictor of AR in all phytoplankton regardless of their size, but mesozooplankton is more important for small phytoplankton forms. Our results support previous expectations and reveal surprising new patterns.Significance StatementUnderstanding the relative importance of biotic and abiotic controls of biodiversity change, in terms of taxa and traits, is critical in times of global and local anthropogenic impact on ecosystem processes. The relative importance of different mechanisms driving phytoplankton community dynamics is still debated, and might vary depending on the environmental conditions. We harnessed four years of data from an underwater imaging microscope, and ancillary monitoring sensors, to study the biotic and abiotic controls of phytoplankton size classes using machine-learning. We find that, contrary to prior expectations, large (blooming) phytoplankton are favoured by high temperature and low levels of microzooplankton. These results help us understand phytoplankton dynamics and improve the modelling of plankton food-webs, with implications for predicting plankton community structure in changing aquatic ecosystems.

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Section: Discussionmentioning

confidence: 99%

Automated plankton monitoring suggests a key role of microzooplankton and temperature for predicting dynamics of phytoplankton size classes

Merkli,

Merz,

Reyes

et al. 2024

Preprint

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“…Freshwater salinization has become an issue in many countries (Cunillera-Montcusí et al, 2022), which makes studies on saline lakes an important reference benchmark required to understand the response of the freshwater ecosystem to salinity effects. Zadereev et al (2023) studied the grazing rate and feeding selectivity of small and large-bodied cladocerans in waters from lakes with different salinity and phytoplankton structure. The study aimed to evaluate the ability of two cladocera species (Moina macrocopa and Daphnia magna) to control phytoplankton abundance by grazing under the effect of salinity.…”

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confidence: 99%

The science of saline lakes: the need for a multidisciplinary approach

Zadereev,

Hueso-Kortekaas,

Deng

et al. 2023

J. Ocean. Limnol.

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Saline lakes are widespread on all continents. Since 1979, an informal international association of salt lake researchers from a variety of disciplines has sponsored a series of triennial conferences to foster scientific exchange and our understanding of saline lakes. International Society for Salt Lake Research (ISSLR, www.isslr.org) was founded in 1994 to establish effective liaison between persons interested in any aspect of inland saline waters, to encourage these interests, and to educate the public in the scientific use, management, and conservation of salt lakes. ISSLR conferences are held triennially. The conferences are usually hosted by a local University or research institution and provide an excellent opportunity for networking among globally dispersed researchers.The 14 th International Conference on Salt Lake Research was held online during October 18-22, 2021 and hosted in Murcia, Spain. The conference was organized by the ISSLR together with the Institute of Saltscapes and Salt Heritage (IPAISAL), an Non-Governmental Organization devoted to the research and dissemination of the natural, cultural, and human values of saltscapes based in Spain. The conference was initially planned to be held in the autumn of 2020, but the travel restrictions imposed by the COVID-19 pandemic advised to postpone it * Egor ZADEREEV was financially supported by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation (No.

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What happens when salinization meets eutrophication? A test using stream microcosms

Moyano Salcedo,

Prat,

Bertrans-Tubau

et al. 2024

Science of The Total Environment

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Grazing rate and feeding selectivity of small and large bodied cladocerans in waters from lakes with different salinity and phytoplankton structure

Cited by 3 publications

References 46 publications

Automated plankton monitoring suggests a key role of microzooplankton and temperature for predicting dynamics of phytoplankton size classes

Automated plankton monitoring suggests a key role of microzooplankton and temperature for predicting dynamics of phytoplankton size classes

The science of saline lakes: the need for a multidisciplinary approach

What happens when salinization meets eutrophication? A test using stream microcosms

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