Niche partitioning of invasive Amur sleeper (Perccottus glenii) amongst native fish communities in three different freshwater ecosystems
Laen...
Kuupäev
2024
Kättesaadav alates
Autorid
Ercoli, Fabio
Kiljunen, Mikko
Teesalu, Paul
Tuvikene, Arvo
Tambets, Meelis
Kärgenberg, Einar
Nõges, Tiina
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Pensoft Publishers
Abstrakt
The invasive fish, Amur sleeper, poses a significant and growing threat to Central European freshwater
ecosystems. Despite its rapid spread, the ecological implications of its invasion have been poorly
explored. Recent findings confirm its presence in various Estonian freshwater systems, raising concerns
about its imminent expansion into larger lakes. To better understand its potential ecological
impacts, we explored the isotopic niche of the Amur sleeper in comparison with native fish species
co-existing in three Estonian freshwater ecosystems. We employed carbon and nitrogen stable isotope
analyses alongside gut content analyses. Our findings show that the Amur sleeper’s diet in newly-invaded
Estonian water bodies predominantly comprises benthic macroinvertebrates, although it may
also include fish, confirming its role as a predator in the local food web. Notably, Amur sleeper populations
exhibited clear isotopic niche partitioning in three invaded ecosystems. A logistic regression
model, based on stomach content analyses, revealed an ontogenetic diet shift from benthivorous to
piscivorous feeding habits from small to large specimens. Amur sleeper exhibits voracious, non-selective
feeding habits, which can negatively impact native freshwater communities. The ability to
occupy a distinct isotopic niche, with minimal overlap with native fish populations, may reduce
interspecific competition, facilitating the spread and establishment of Amur sleeper in newly-invaded
habitats. Managing the spread of this invasive species thus becomes even more critical to safeguard
the integrity of native aquatic ecosystems.
This project has received funding from the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement No 951963. The project was financed by the Estonian University of Life Sciences (Project Number P190254PKKH to FE) and by the Estonian Research Council (Mobilitas Pluss project MOBJD29 to FE). The Estonian Research Council grant PRG709, the Climate Change Mitigation and Adaptation Programme were financed by the European Economic Area Financial Mechanism. Additional funding came from the Environmental Investment Centre projects “Implementation of the action plan for the use and protection of crayfish stocks” and “Eradication of aquatic invasive species in Estonian freshwaters” No 4-17/16674.
This project has received funding from the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement No 951963. The project was financed by the Estonian University of Life Sciences (Project Number P190254PKKH to FE) and by the Estonian Research Council (Mobilitas Pluss project MOBJD29 to FE). The Estonian Research Council grant PRG709, the Climate Change Mitigation and Adaptation Programme were financed by the European Economic Area Financial Mechanism. Additional funding came from the Environmental Investment Centre projects “Implementation of the action plan for the use and protection of crayfish stocks” and “Eradication of aquatic invasive species in Estonian freshwaters” No 4-17/16674.
Kirjeldus
Märksõnad
gut content, invasive species, isotopic niche, native fish community, ontogenetic shift, stable isotopes, articles
Viide
Ercoli F, Kiljunen M, Teesalu P, Tuvikene A, Tambets M, Kärgenberg E, Nõges T (2024) Niche partitioning of invasive Amur sleeper (Perccottus glenii) amongst native fish communities in three different freshwater ecosystems. NeoBiota 95: 181–198. https://doi.org/10.3897/ neobiota.95.116327