Changes in phenology and abundance of an at-risk butterfly

摘要: The US Endangered Species Act aims to recover threatened species and preserve their ecosystems, often through habitat management restoration. In the face of climate change phenological shifts, however, can seem futile. One most conspicuous effects is that many are shifting in phenology, i.e., timing life history events. These shifts assumed have population-level on at-risk species, although it less clear whether these likely be positive or negative. Here, we use a 27-year-long data set Fender’s blue (Icaricia icarioides fenderi), an endangered butterfly, investigate long-term changes abundance phenology at nine sites near Eugene, Oregon, USA. For blue, day peak flight activity consistently advanced all from 1993 2019. At same time, populations increased some was not changing others. There no association population growth advancement activity. This suggests may “fingerprint” change, they always cause for concern. Implications insect conservation Lessons butterfly applicable other butterflies. Despite rapidly climate, least rare conserved recovered with appropriate management.