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Global warming favours light-coloured insects in Europe

Dirk Zeuss,R. Brandl,M. Brändle,C. Rahbek,S. Brunzel

Published 2014 in Nature Communications

ABSTRACT

Associations between biological traits of animals and climate are well documented by physiological and local-scale studies. However, whether an ecophysiological phenomenon can affect large-scale biogeographical patterns of insects is largely unknown. Insects absorb energy from the sun to become mobile, and their colouration varies depending on the prevailing climate where they live. Here we show, using data of 473 European butterfly and dragonfly species, that dark-coloured insect species are favoured in cooler climates and light-coloured species in warmer climates. By comparing distribution maps of dragonflies from 1988 and 2006, we provide support for a mechanistic link between climate, functional traits and species that affects geographical distributions even at continental scales. Our results constitute a foundation for better forecasting the effect of climate change on many insect groups. Large-scale effects of climate on the distribution of insects are unclear. Here, the authors use data from European butterflies and dragonflies to show that light-coloured insect species are favoured in warmer climates, which has implications in forecasting the potential impact of climate change.

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