Butterfly abundance declines over 20 years of systematic monitoring in Ohio, USA
T. Wepprich, J. Adrion, L. Ries, J. Wiedmann, N. Haddad
The paper tracks 21 years of butterfly abundance in Ohio, finding a 33% decline and more species with negative trends than positive ones, suggesting widespread environmental impacts.
bioRxiv · Jun 11, 2019Ecology