Yesterday several of us blogged about population decline in the monarch butterfly (Danaus plexippus). I said that I hadn’t seen peer reviewed science about it. I still haven’t read the whole research paper, because I’m not logged into an academic library just now. But the abstract (summary) of the paper is open to anybody who can read. Here it is.
The authors say, ‘There has been a large decline in milkweed in agricultural fields in the Midwest over the last decade. This loss is coincident with the increased use of glyphosate herbicide in conjunction with increased planting of genetically modified (GM) glyphosate-tolerant corn (maize) and soybeans (soya).’
In other words, being good scientists, they make observations but they don’t assume that one thing causes another thing. It just looks quite likely, doesn’t it?
They conclude, ‘results strongly suggest that a loss of agricultural milkweeds is a major contributor to the decline in the monarch population.’
I’m grateful to GM Watch Reviews for drawing attention to this research.