Species’ ecological functionality alters the outcome of fish stocking success predicted by a food-web model
Uusi-Heikkilä, S., Perälä, T., & Kuparinen, A. (2018). Species’ ecological functionality alters the outcome of fish stocking success predicted by a food-web model. Royal Society Open Science, 2018(5), Article 180465. https://doi.org/10.1098/rsos.180465
Published inRoyal Society Open Science
© 2018 The Authors
Fish stocking is used worldwide in conservation and management, but its effects on food-web dynamics and ecosystem stability are poorly known. To better understand these effects and predict the outcomes of stocking, we used an empirically validated network model of a well-studied lake ecosystem. We simulate two stocking scenarios with two native fish species valuable for fishing. In the first scenario, we stock planktivorous fish (whitefish) larvae in the ecosystem. This leads to a 1% increase in adult whitefish biomasses and decreases the biomasses of the top predator (perch). In the second scenario, we also stock perch larvae in the ecosystem. This decreases the planktivorous whitefish and the oldest top predator age class biomasses, and destabilizes the ecosystem. Our results demonstrate that the effects of stocking depend on the species' position in the food web and thus cannot be assessed without considering interacting species. We further show that stocking can lead to undesired outcomes from both management and conservation perspectives. The gains of stocking can remain minor and have adverse effects on the entire ecosystem. ...
PublisherRoyal Society Publishing
Dataset(s) related to the publicationhttp://dx.doi.org/10.5061/dryad.q53g43n
Publication in research information system
MetadataShow full item record
Additional information about fundingThis study was funded by the Academy of Finland and Natural Sciences and Engineering Research Council of Canada (A.K.).
Showing items with similar title or keywords.
Fishing triggers trophic cascade in terms of variation, not abundance in an allometric trophic network model Uusi-Heikkilä, Silva; Perälä, Tommi; Kuparinen, Anna (Canadian Science Publishing, 2021)Trophic cascade studies often rely on linear food chains instead of complex food webs and are typically measured as biomass averages, not as biomass variation. We study trophic cascades propagating across a complex food ...
Perälä, Tommi; Uusi-Heikkilä, Silva; Kuparinen, Anna (Finnish Zoological and Botanical Publishing Board, 2021)Re-establishment of a declined apex predator fish species in a lake ecosystem may have dramatic effects on other fish and plankton community already inhabiting the ecosystem. We studied mechanistically potential impacts ...
Environmentally-induced noise dampens and reddens with increasing trophic level in a complex food web Kuparinen, Anna; Perälä, Tommi; Martinez, Neo D.; Valdovinos, Fernanda S. (Blackwell, 2019)Stochastic variability of key abiotic factors including temperature, precipitation and the availability of light and nutrients greatly influences species’ ecological function and evolutionary fate. Despite such influence, ...
Diet and trophic niche of the invasive signal crayfish in the first invaded Italian stream ecosystem Ercoli, Fabio; Ghia, Daniela; Gruppuso, Laura; Fea, Gianluca; Bo, Tiziano; Ruokonen, Timo J. (Nature Publishing Group, 2021)The occurrence of the signal crayfish Pacifastacus leniusculus in the Valla Stream was the first established population of this invasive species recorded in an Italian stream ecosystem. We evaluated the seasonality of diet ...
Vejříková, Ivana; Eloranta, Antti P.; Vejřík, Lukáš; Šmejkal, Marek; Čech, Martin; Sajdlová, Zuzana; Frouzová, Jaroslava; Kiljunen, Mikko; Peterka, Jiří (Public Library of Science, 2017)Generalist species commonly have a fundamental role in ecosystems as they can integrate spatially distinct habitats and food-web compartments, as well as control the composition, abundance and behavior of organisms at ...