Data from: Global test of Eltonian niche conservatism of nonnative freshwater fish species between their native and introduced ranges ...

Despite growing evidence that biotic interactions limit the distribution of species and their potential redistribution under climate change, the recent surge of interest in niche conservatism has predominantly focused on the Grinellian (abiotic) niche, whereas few studies have attempted to quantify...

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Bibliographic Details
Main Authors: Comte, Lise, Cucherousset, Julien, Olden, Julian D.
Format: Dataset
Language:English
Published: Dryad 2016
Subjects:
Online Access:https://dx.doi.org/10.5061/dryad.6q036
https://datadryad.org/stash/dataset/doi:10.5061/dryad.6q036
Description
Summary:Despite growing evidence that biotic interactions limit the distribution of species and their potential redistribution under climate change, the recent surge of interest in niche conservatism has predominantly focused on the Grinellian (abiotic) niche, whereas few studies have attempted to quantify potential lability in the Eltonian (biotic or trophic) niche. Here, we test for conservatism in the Eltonian niche of 32 freshwater fish species between their introduced and native ranges from 435 populations across the globe. We used stable isotope data to quantify niche shifts along the horizontal (δ13C: indicating the origin of the resources consumed) and vertical (δ15N: describing the trophic position) dimensions of the isotopic niche, as well as shifts in overall isotopic niche breadth. Using an assemblage centroid standardized isotope vector analysis and controlling for phylogenetic relatedness among species, we demonstrated that introduced freshwater fishes exhibited flexibility in both resource use and ... : Stable isotopes characteristics of the fish species within their native and introduced rangestab_dryad.txt ...