Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop

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dc.creator Schenone, Luca
dc.creator Modenutti, Beatriz
dc.creator Martyniuk, Nicolás
dc.creator Bastidas Navarro, Marcela
dc.creator Laspoumaderes, Cecilia
dc.creator Balseiro, Esteban
dc.date 2021
dc.date.accessioned 2022-05-04T12:31:14Z
dc.date.available 2022-05-04T12:31:14Z
dc.identifier http://rdi.uncoma.edu.ar/handle/uncomaid/16092 es_ES
dc.identifier http://rdi.uncoma.edu.ar/handle/uncomaid/16700
dc.description.abstract 1. Pelagic microbial food webs are structured by zooplankton through grazing and nutrient recycling. Cladocerans and copepods are assumed to have different effects on the microbial loop by grazing on different prey sizes and releasing phos- phorus (P) differentially. Here, we assessed this effect of differential zooplankton grazing and nutrient recycling on microbial loop dynamics using a combination of experimental and modelling approaches. 2. We performed field incubation experiments in an oligotrophic mountain lake (north-Patagonian Andes) using the natural microbial community and the two dominant zooplankton taxa: a cladoceran (Diaphanosoma chilense) and a copepod (Boeckella gibbosa). The effect of zooplankton grazing and nutrient recycling were assessed separately in different treatments with direct and indirect zooplankton presence, respectively. We built a mechanistic model to estimate zooplankton grazing and P recycling and prey P quotas. The model was parameterised with the results from our field experiment and with prior information from size-based traits and zooplankton C:P using a Bayesian approach. Laboratory experiments for zooplankton P excretion were also performed to test the predictive accuracy of our model. 3. Our model showed that copepods and cladocerans have contrasting effects on the microbial loop. Diaphanosoma chilense grazed mainly on picoplankton while B. gibbosa grazed on nanoflagellates and algae. Diaphanosoma chilense reduced the biomass and increased P quota of picoplankton, and reduced the P quota of nanoflagellates. In contrast, B. gibbosa released more P, increasing the picoplankton biomass and reducing the biomass of nanoflagellates, but increasing its P quota. 4. Based on our experimental and model results, copepod grazing favours higher Pacquisition rates for cladocerans by releasing more P for picoplankton. By contrast, cladocerans would have a mixed effect on the main food items of copepods by increasing P quotas of the strict osmotrophic algae but decreasing P quotas of nanoflagellates. 5. Our mechanistic model is useful to quantitatively assess key planktonic variables, which are usually difficult to measure in the field, such as zooplankton P excretion es_ES
dc.format application/pdf es_ES
dc.format.extent pp. 2322- 2337 es_ES
dc.language eng es_ES
dc.publisher Wiley es_ES
dc.relation.uri https://doi.org/10.1111/fwb.13835 es_ES
dc.rights Atribución-NoComercial-CompartirIgual 2.5 Argentina es_ES
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ es_ES
dc.source Freshwater Biology es_ES
dc.subject Bacterivory es_ES
dc.subject Bayesian approach es_ES
dc.subject Ecological stoichiometry es_ES
dc.subject Mixotrophic nanoflagellates es_ES
dc.subject Phosphorus quota es_ES
dc.subject.other Ciencias de la Tierra y Medio Ambiente es_ES
dc.title Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop es_ES
dc.type Articulo es
dc.type article eu
dc.type acceptedVersion eu
dc.description.fil Fil: Schenone, Luca. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. es_ES
dc.description.fil Fil: Schenone, Luca. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. es_ES
dc.description.fil Fil: Modenutti, Beatriz. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. es_ES
dc.description.fil Fil: Modenutti, Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. es_ES
dc.description.fil Fil: Martyniuk, Nicolás. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. es_ES
dc.description.fil Fil: Martyniuk, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. es_ES
dc.description.fil Fil: Bastidas Navarro, Marcela. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. es_ES
dc.description.fil Fil: Bastidas Navarro, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. es_ES
dc.description.fil Fil: Laspoumaderes, Cecilia. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. es_ES
dc.description.fil Fil: Laspoumaderes, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. es_ES
dc.description.fil Fil: Laspoumaderes, Cecilia. Shelf Sea System Ecology, Alfred-Wegener. Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI). Biologische Anstalt Helgoland, Helgoland; Germany. es_ES
dc.description.fil Fil: Balseiro, Esteban. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. es_ES
dc.description.fil Fil: Balseiro, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. es_ES
dc.relation.alternativeid https://doi.org/10.1111/fwb.13835
dc.cole Artículos es_ES


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