Massachusetts Butterflies Move North as Climate Warms
The authors of a Harvard study published in Nature Climate Change gathered their data from an unlikely sourceâ€”the trip accounts of the Massachusetts Butterfly Club. Over the past 19 years, the amateur naturalist group has logged species counts on nearly 20,000 expeditions throughout Massachusetts. Their records fill a crucial gap in the scientific record.
Once analyzed, the data show a clear trend. According to Greg Breed, lead author on the study and a post-doctoral fellow at the Harvard Forest in Petersham, Mass., “Over the past 19 years, a warming climate has been reshaping Massachusetts butterfly communities.” The study creates new questions for managing threatened species. “For most butterfly species, climate change seems to be a stronger change-agent than habitat loss. Protecting habitat remains a key management strategy, and that may help some butterfly species. However, for many others, habitat protection will not mitigate the impacts of warming,” says Breed.