Figure 7. Regional fitted models and data for mosquito species richness and abundance in New Jersey.

Black line and dots show mosquito species richness for Northern (a), Widespread (c) and Southern (e) groups of mosquitoes or relative abundance (b,d,f). Red lines show full models, and blue dashed lines shows reduced models excluding DDT parameters. The equation in each panel gives the fitted model with all significant predictors (P<0.05) and fraction of variance explained (pseudo-R², ‘pR²') from the generalized least squares models (red font-full model, blue font- reduced model with DDT parameters excluded). The abbreviations designate DDT concentration (DDT, Z-scores), DDT use by the mosquito control districts (yes/no), precipitation (PCP, standardized precipitation index), urbanization (URB, human population in 100,000), average annual temperature November through October (TMP, °C). For relative variable significance in the model see Table 2.