earth.com
Climate change is pushing butterflies into new habitats
Butterflies are redrawing the map of where they live. A global review of butterfly range shifts finds movement on every continent where they occur, at a scale no earlier survey captured. The stakes reach past the insects. Butterflies pollinate plants, feed birds, and act as an early alarm. When their ranges move this fast, whole food webs are shifting underneath them. Researchers compiled 6,182 range shift records for 1,758 species across 105 countries. That is roughly one in ten of the butterfly species known to science. Butterfly ranges shift worldwide The work was led by Dr. Shawan Chowdhury, head of the Global Change Ecology Lab at Monash University, with 68 butterfly experts from 49 countries as co-authors. “We found butterfly species shifting their ranges on every continent where they occur. The scale is astonishing, and it’s happening far beyond the well-studied regions of Europe and North America,” says Chowdhury. In the dataset, 80% of species expanded their ranges. Another 27% contracted, and 22% moved up or down mountain slopes. A single species can fall into more than one group. Climate change and severe weather were linked to 79% of the documented shifts. Agriculture and human disturbance came next, and they...