Figure 1

Shannon entropy[38]was calculated athttp://www.hiv.lanl.gov/. Shannon entropy is a measure of variation in DNA and protein sequence alignments. Entropy has been used to test whether new virus strains (HIV and Hepatitis C) are more variable than the background (older strains), a more variable strain (higher entropy) is indicative of a “break-out” strain [39]. Entropy was calculated for the invasive species MED and MEAM1 because they are the “break-out” species in the complex.