Next Article in Journal
Determining the Relevant Scale to Analyze the Quality of Regional Groundwater Resources While Combining Groundwater Bodies, Physicochemical and Biological Databases in Southeastern France
Next Article in Special Issue
Double Trouble: Synergy between Habitat Loss and the Spread of the Alien Species Caulerpa cylindracea (Sonder) in Three Mediterranean Habitats
Previous Article in Journal
Interaction between Waves and Maritime Structures
Previous Article in Special Issue
Broad Diet Composition and Seasonal Feeding Variation Facilitate Successful Invasion of the Shimofuri Goby (Tridentiger bifasciatus) in a Water Transfer System
Article

Trophic Niches, Trophic Positions, and Niche Overlaps between Non-Native and Native Fish Species in a Subalpine Lake

Water Research Institute (IRSA)—CNR, Largo Tonolli 50, 28922 Verbania Pallanza, VB, Italy
*
Author to whom correspondence should be addressed.
The first two authors equally contributed to the study.
Water 2020, 12(12), 3475; https://doi.org/10.3390/w12123475
Received: 3 November 2020 / Revised: 4 December 2020 / Accepted: 7 December 2020 / Published: 10 December 2020
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. View Full-Text
Keywords: biological invasions; invasive species; stable isotopes; isotopic niche; food webs; PASE electrofishing; deep lakes; biodiversity; protected areas biological invasions; invasive species; stable isotopes; isotopic niche; food webs; PASE electrofishing; deep lakes; biodiversity; protected areas
Show Figures

Graphical abstract

MDPI and ACS Style

Cicala, D.; Polgar, G.; Mor, J.R.; Piscia, R.; Brignone, S.; Zaupa, S.; Volta, P. Trophic Niches, Trophic Positions, and Niche Overlaps between Non-Native and Native Fish Species in a Subalpine Lake. Water 2020, 12, 3475. https://doi.org/10.3390/w12123475

AMA Style

Cicala D, Polgar G, Mor JR, Piscia R, Brignone S, Zaupa S, Volta P. Trophic Niches, Trophic Positions, and Niche Overlaps between Non-Native and Native Fish Species in a Subalpine Lake. Water. 2020; 12(12):3475. https://doi.org/10.3390/w12123475

Chicago/Turabian Style

Cicala, Davide, Gianluca Polgar, Jordi R. Mor, Roberta Piscia, Stefano Brignone, Silvia Zaupa, and Pietro Volta. 2020. "Trophic Niches, Trophic Positions, and Niche Overlaps between Non-Native and Native Fish Species in a Subalpine Lake" Water 12, no. 12: 3475. https://doi.org/10.3390/w12123475

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop