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Monarch butterflies face bleak future study finds
Iowa State University researcher John Pleasants and colleagues report in Scientific Reports that monarch butterflies could drop to levels where migration collapses within 20 years. Eastern population fell 84 percent 1996 2014, with recent rebound offset by a Mexico storm. milkweed loss and weather are key limits. Glyphosate has eliminated about 1 billion milkweed plants across North American fields.
MENTIONED IN THIS ARTICLE
Iowa State University
John Pleasants
Pleasants
ISU
U.S. Geological Survey
Scripps Institution of Oceanography
University of California- San Diego
Scientific Reports
Mexico
Monsanto