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Ocean acidification induces changes in algal palatability and herbivore feeding behavior and performance

Duarte, Cristian ; López, Jorge ; Benítez, Samanta ; Manríquez, Patricio H ; Navarro, Jorge M ; Bonta, Cesar C ; Torres, Rodrigo ; Quijón, Pedro

Oecologia, 2016-02, Vol.180 (2), p.453-462 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Ocean acidification induces changes in algal palatability and herbivore feeding behavior and performance
Autor: Duarte, Cristian ; López, Jorge ; Benítez, Samanta ; Manríquez, Patricio H ; Navarro, Jorge M ; Bonta, Cesar C ; Torres, Rodrigo ; Quijón, Pedro
Assuntos: absorption ; acidification ; Amphipoda - growth & development ; Amphipoda - physiology ; Animal behavior ; Animals ; Biomedical and Life Sciences ; carbon dioxide ; Carbon Dioxide - chemistry ; coasts ; Durvillaea ; Durvillaea antarctica ; Ecology ; Ecosystem ; food choices ; Food Preferences ; grazing ; herbivores ; Herbivory ; Homeostasis ; Hydrogen-Ion Concentration ; Hydrology/Water Resources ; Life Sciences ; Nutritive Value ; Ocean acidification ; Oceans and Seas ; Orchestoidea tuberculata ; palatability ; Phaeophyceae - chemistry ; Plant Sciences ; PLANT-MICROBE-ANIMAL INTERACTIONS - ORIGINAL RESEARCH ; Proteins - administration & dosage ; Seawater - chemistry ; Taste
É parte de: Oecologia, 2016-02, Vol.180 (2), p.453-462
Notas: http://dx.doi.org/10.1007/s00442-015-3459-3
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Descrição: The effects of global stressors on a species may be mediated by the stressors’ impact on coexisting taxa. For instance, herbivore–algae interactions may change due to alterations in algal nutritional quality resulting from high CO₂ levels associated with ocean acidification (OA). We approached this issue by assessing the indirect effects of OA on the trophic interactions between the amphipod Orchestoidea tuberculata and the brown alga Durvillaea antarctica, two prominent species of the South-east Pacific coast. We predicted that amphipod feeding behavior and performance (growth rate) will be affected by changes in the palatability of the algae exposed to high levels (1000 ppm) of CO₂. We exposed algae to current and predicted (OA) atmospheric CO₂ levels and then measured their nutritive quality and amphipod preference in choice trials. We also assessed consumption rates separately in no-choice trials, and measured amphipod absorption efficiency and growth rates. Protein and organic contents of the algae decreased in acidified conditions and amphipods showed low preference for these algae. However, in the no-choice trials we recorded higher grazing rates on algae exposed to OA. Although amphipod absorption efficiency was lower on these algae, growth rates did not differ between treatments, which suggests the occurrence of compensatory feeding. Our results suggest that changes in algal nutritional value in response to OA induce changes in algal palatability and these in turn affect consumers’ food preference and performance. Indirect effects of global stressors like OA can be equally or more important than the direct effects predicted in the literature.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Ocean acidification induces changes in algal palatability and herbivore feeding behavior and performance

Duarte, Cristian ; López, Jorge ; Benítez, Samanta ; Manríquez, Patricio H ; Navarro, Jorge M ; Bonta, Cesar C ; Torres, Rodrigo ; Quijón, Pedro

Berlin/Heidelberg: Springer Berlin Heidelberg

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