| Title | Trophic niches, trophic positions, and niche overlaps between non-native and native fish species in a subalpine lake |
| Abstract | In the last century, Italian freshwater ecosystems have been invaded by several non-native fish species. In the subalpine Lake Mergozzo (northern Italy), several recently introduced non-native species dramatically expanded their populations. We used carbon and nitrogen stable isotopes to describe the isotopic niches and trophic positions of native and non-native fish species in Lake Mergozzo. We evaluated their trophic niches, trophic diversity, trophic redundancy and trophic evenness utilizing isotopic niche metrics, and estimated asymmetrical niche overlaps. The trophic traits of non-native fish species and Perca fluviatilis clearly define them as trophic generalists, in terms of among-individual variability of their isotopic niches. The historical increase in abundance of fish non-native species in this lake, their dominance by numbers and biomass within the assemblage, and their broad asymmetrical niche overlaps suggest that their higher degree of trophic generalism might have been one of the key factors that have promoted the invasion of the recipient community. ? 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
| Source | Water (Basel) 12 (12), pp. 1–27 |
| Keywords | BiodiversityBiological invasions; Deep lakes; Food webs; Invasive species; Isotopic niche; PASE electrofishing; Protected areas; Stable isotopes |
| Journal | Water (Basel) |
| Editor | Molecular Diversity Preservation International, Basel, |
| Year | 2020 |
| Type | Articolo in rivista |
| DOI | 10.3390/w12123475 |
| Authors | Cicala, D. and Polgar, G. and Mor, J.R. and Piscia, R. and Zaupa, S. and Brignone S., and Volta, P. |
| Text | 454872 2020 10.3390/w12123475 Scopus 2 s2.0 85100008854 Biodiversity Biological invasions; Deep lakes; Food webs; Invasive species; Isotopic niche; PASE electrofishing; Protected areas; Stable isotopes Trophic niches, trophic positions, and niche overlaps between non native and native fish species in a subalpine lake Cicala, D. and Polgar, G. and Mor, J.R. and Piscia, R. and Zaupa, S. and Brignone S., and Volta, P. IRSA CNR In the last century, Italian freshwater ecosystems have been invaded by several non native fish species. In the subalpine Lake Mergozzo northern Italy , several recently introduced non native species dramatically expanded their populations. We used carbon and nitrogen stable isotopes to describe the isotopic niches and trophic positions of native and non native fish species in Lake Mergozzo. We evaluated their trophic niches, trophic diversity, trophic redundancy and trophic evenness utilizing isotopic niche metrics, and estimated asymmetrical niche overlaps. The trophic traits of non native fish species and Perca fluviatilis clearly define them as trophic generalists, in terms of among individual variability of their isotopic niches. The historical increase in abundance of fish non native species in this lake, their dominance by numbers and biomass within the assemblage, and their broad asymmetrical niche overlaps suggest that their higher degree of trophic generalism might have been one of the key factors that have promoted the invasion of the recipient community. 2020 by the authors. Licensee MDPI, Basel, Switzerland. 12 Published version https //www.scopus.com/inward/record.uri eid=2 s2.0 85100008854 doi=10.3390%2fw12123475 partnerID=40 md5=2edcaef2a42fda871c1fe8a5c98beb7d cited By 0 Articolo in rivista Molecular Diversity Preservation International 2073 4441 Water Basel Water Basel Water Basel Water. Basel ZAUPA SILVIA CICALA DAVIDE POLGAR GIANLUCA jordirene.morroy MOR ROY JORDI RENE BRIGNONE STEFANO roberta.piscia PISCIA ROBERTA pietro.volta VOLTA PIETRO |
