Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop
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...
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| Formato: | Articulo article acceptedVersion |
| Lenguaje: | Inglés |
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Wiley
2021
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| Acceso en línea: | http://rdi.uncoma.edu.ar/handle/uncomaid/16092 http://rdi.uncoma.edu.ar/handle/uncomaid/16700 |
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I22-R178-uncomaid-16700 |
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dspace |
| institution |
Universidad Nacional del Comahue |
| institution_str |
I-22 |
| repository_str |
R-178 |
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Repositorio Institucional UNCo |
| language |
Inglés |
| topic |
Bacterivory Bayesian approach Ecological stoichiometry Mixotrophic nanoflagellates Phosphorus quota Ciencias de la Tierra y Medio Ambiente |
| spellingShingle |
Bacterivory Bayesian approach Ecological stoichiometry Mixotrophic nanoflagellates Phosphorus quota Ciencias de la Tierra y Medio Ambiente Schenone, Luca Modenutti, Beatriz Martyniuk, Nicolás Bastidas Navarro, Marcela Laspoumaderes, Cecilia Balseiro, Esteban Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop |
| topic_facet |
Bacterivory Bayesian approach Ecological stoichiometry Mixotrophic nanoflagellates Phosphorus quota Ciencias de la Tierra y Medio Ambiente |
| description |
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 |
| format |
Articulo article acceptedVersion |
| author |
Schenone, Luca Modenutti, Beatriz Martyniuk, Nicolás Bastidas Navarro, Marcela Laspoumaderes, Cecilia Balseiro, Esteban |
| author_facet |
Schenone, Luca Modenutti, Beatriz Martyniuk, Nicolás Bastidas Navarro, Marcela Laspoumaderes, Cecilia Balseiro, Esteban |
| author_sort |
Schenone, Luca |
| title |
Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop |
| title_short |
Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop |
| title_full |
Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop |
| title_fullStr |
Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop |
| title_full_unstemmed |
Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop |
| title_sort |
modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop |
| publisher |
Wiley |
| publishDate |
2021 |
| url |
http://rdi.uncoma.edu.ar/handle/uncomaid/16092 http://rdi.uncoma.edu.ar/handle/uncomaid/16700 |
| work_keys_str_mv |
AT schenoneluca modellingkeyvariablesforunderstandingtheeffectsofgrazingandnutrientrecyclingbyzooplanktononthefreshwatermicrobialloop AT modenuttibeatriz modellingkeyvariablesforunderstandingtheeffectsofgrazingandnutrientrecyclingbyzooplanktononthefreshwatermicrobialloop AT martyniuknicolas modellingkeyvariablesforunderstandingtheeffectsofgrazingandnutrientrecyclingbyzooplanktononthefreshwatermicrobialloop AT bastidasnavarromarcela modellingkeyvariablesforunderstandingtheeffectsofgrazingandnutrientrecyclingbyzooplanktononthefreshwatermicrobialloop AT laspoumaderescecilia modellingkeyvariablesforunderstandingtheeffectsofgrazingandnutrientrecyclingbyzooplanktononthefreshwatermicrobialloop AT balseiroesteban modellingkeyvariablesforunderstandingtheeffectsofgrazingandnutrientrecyclingbyzooplanktononthefreshwatermicrobialloop |
| _version_ |
1807224534025109504 |
| spelling |
I22-R178-uncomaid-167002023-08-25T18:02:50Z Modelling key variables for understanding the effects of grazing and nutrient recycling by zooplankton on the freshwater microbial loop Schenone, Luca Modenutti, Beatriz Martyniuk, Nicolás Bastidas Navarro, Marcela Laspoumaderes, Cecilia Balseiro, Esteban Bacterivory Bayesian approach Ecological stoichiometry Mixotrophic nanoflagellates Phosphorus quota Ciencias de la Tierra y Medio Ambiente 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 Fil: Schenone, Luca. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. Fil: Schenone, Luca. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Modenutti, Beatriz. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. Fil: Modenutti, Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Martyniuk, Nicolás. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. Fil: Martyniuk, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Bastidas Navarro, Marcela. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. Fil: Bastidas Navarro, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Laspoumaderes, Cecilia. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. Fil: Laspoumaderes, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Laspoumaderes, Cecilia. Shelf Sea System Ecology, Alfred-Wegener. Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI). Biologische Anstalt Helgoland, Helgoland; Germany. Fil: Balseiro, Esteban. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio de Limnología; Argentina. Fil: Balseiro, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. 2021 2022-05-04T12:31:14Z 2022-05-04T12:31:14Z Articulo article acceptedVersion http://rdi.uncoma.edu.ar/handle/uncomaid/16092 http://rdi.uncoma.edu.ar/handle/uncomaid/16700 eng https://doi.org/10.1111/fwb.13835 https://doi.org/10.1111/fwb.13835 Atribución-NoComercial-CompartirIgual 2.5 Argentina https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ application/pdf pp. 2322- 2337 application/pdf Wiley Freshwater Biology |