Population niche breadth and individual trophic specialisation of fish along a climate-productivity gradient

Data supporting Sánchez-Hernández et al. “Population niche breadth and individual trophic specialisation of fish along a climate-productivity gradient” (Reviews in Fish Biology and Fisheries). The database includes information about environmental gradients (temperature, precipitation, and nutrients), lake morphometry (visibility, depth, and area), fish communities (richness, competition, and predation), prey availability (richness and density) and feeding (population niche breadth and individual trophic specialisation) for four native fish species from 35 subarctic lakes along a marked climate-productivity gradient corresponding to future climate change predictions.