Source community
The source plant community was isolated from a eutrophic pond adjacent to fallowed agricultural fields on the Macdonald campus of McGill University, Quebec, Canada (45° 42’ N, 73° 94’ W). The pond sustains a diverse community of floating macrophytes, the four most abundant beingLemna minor (Lm), Lemna trisulca (Lt), Spirodela polyrhiza (Sp) and Wolffia columbiana (Wc), all in the familyLemnaceae . Large samples consisting of hundreds of thousands of individuals were taken in June 2020 and manually separated into the constituent species.