利用35个监测项目中76000个调查中1260万只蝴蝶的记录，研究组描述了整个美国的蝴蝶丰度总体和特定物种的趋势。2000年至2020年间，有记录的554种蝴蝶的总数量下降了22%。物种数量普遍下降，减少的物种数量是增加的13倍。美国所有地区蝴蝶数量普遍下降，这凸显了保护蝴蝶免受进一步损失的迫切需要。
据了解，昆虫种群的数量下降已经被记录下来，昆虫损失的潜在后果是可怕的。蝴蝶是被调查最多的昆虫类群，但分析在地理范围上受到限制，或者依赖于单一监测项目的数据。
附：英文原文
Title: Rapid butterfly declines across the United States during the 21st century
Author: Collin B. Edwards, Elise F. Zipkin, Erica H. Henry, Nick M. Haddad, Matthew L. Forister, Kevin J. Burls, Steven P. Campbell, Elizabeth E. Crone, Jay Diffendorfer, Margaret R. Douglas, Ryan G. Drum, Candace E. Fallon, Jeffrey Glassberg, Eliza M. Grames, Rich Hatfield, Shiran Hershcovich, Scott Hoffman Black, Elise A. Larsen, Wendy Leuenberger, Mary J. Linders, Travis Longcore, Daniel A. Marschalek, James Michielini, Naresh Neupane, Leslie Ries, Arthur M. Shapiro, Ann B. Swengel, Scott R. Swengel, Douglas J. Taron, Braeden Van Deynze, Jerome Wiedmann, Wayne E. Thogmartin, Cheryl B. Schultz
Issue&Volume: 2025-03-07
Abstract: Numerous declines have been documented across insect groups, and the potential consequences of insect losses are dire. Butterflies are the most surveyed insect taxa, yet analyses have been limited in geographic scale or rely on data from a single monitoring program. Using records of 12.6 million individual butterflies from >76,000 surveys across 35 monitoring programs, we characterized overall and species-specific butterfly abundance trends across the contiguous United States. Between 2000 and 2020, total butterfly abundance fell by 22% across the 554 recorded species. Species-level declines were widespread, with 13 times as many species declining as increasing. The prevalence of declines throughout all regions in the United States highlights an urgent need to protect butterflies from further losses.
DOI: adp4671
Source: https://www.science.org/doi/10.1126/science.adp4671