Data from: Seasonal change in trophic niche of adfluvial arctic grayling (Thymallus arcticus) and coexisting fishes in a high-elevation lake system ...

• Main Authors: Cutting, Kyle A., Cross, Wyatt F., Anderson, Michelle L., Reese, Elizabeth G.
• Format: Dataset
• Language: English
• Published: Dryad 2017
• Subjects: Recent; Hypoxia; Season; Arctic grayling; Holocene; Thymallus arcticus; non-native species; Arctic
• Online Access: https://dx.doi.org/10.5061/dryad.0c42k; https://datadryad.org/stash/dataset/doi:10.5061/dryad.0c42k

Introduction of non-native species is a leading threat to global aquatic biodiversity. Competition between native and non-native species is often influenced by changes in food availability or suitable habitat conditions. We investigated diet breadth and degree of trophic niche overlap for a fish assemblage of native and non-native species inhabiting a shallow, high elevation lake system. This assemblage includes one of the last remaining post-glacial endemic populations of adfluvial Arctic grayling (Thymallus arcticus) in the contiguous United States. We examined gut contents and stable isotope values of fish taxa in fall and spring to assess both short- (within season) and long-term (between season) changes in trophic niches. We incorporated these data into a secondary isotopic analysis using a Bayesian statistical framework to estimate long-term trophic niche. Our data suggest that in this system, Arctic grayling share both a short- and long-term common food base with non-native trout of cutthroat x ... : Dataset for finalized Arctic Grayling MS_Cutting et al. 2016The excel table contains all the data used in the manuscript by Cutting et al. (2016) titled, "Seasonal Change in Trophic Niche of Adfluvial Arctic Grayling (Thymallus arcticus) and Coexisting Fishes in a High-elevation Lake System". Data are separated by individual spread sheets names. Individuals sheets can be used to reproduce all figures and analyses. ...