Butterfly Canaries in the Earth Ecosystem Coalmine
Two-tailed Swallowtail
Guest post by Leslie Olsen
Predicting the effects of climate change and other human impacts on Earth ecosystems is a critical goal for policy makers, scientists, and environmentalists. Some effects, such as weather extremes and biodiversity decline are becoming clear to everyone. One group of species, the butterflies, is especially sensitive to environmental change, and scientists are using the group to gauge the effects of the changes on other species.
Like canaries in a coalmine, butterflies can serve as valuable indicators of significant changes. Butterflies are easy to see. Moreover, their metabolism and short life span make their numbers an especially sensitive gauge of environmental changes. When a butterfly population falls, other species may follow. Fluctuations in temperature patterns, temperature extremes, droughts, floods, and severe storms affect butterfly populations throughout North America. Studies on the impact of climate changes on insects…
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