Volta

Insect responses to global change offer signposts for biodiversity and conservation

1. Insects have emerged as causes célèbres for widespread concern about human effects on global biodiversity. Here, we consider how insects provide opportunities both to understand the ecological effects of global change and to enhance environmental conservation. 2. Despite a limited time frame and geographic extent of quantitative evidence, recent studies of changes to the abundance, distribution, and diversity of insects indicate temporally heterogeneous trends which vary among taxa, regions, and biotopes. These results suggest a) that insect numbers are responding to multiple stressors in the wider context of the changes to fitness, abundance, distributions, and biotic interactions that result from habitat and climate change; and b) that habitat specialists with narrow geographic ranges may be particularly at risk. 3. …

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