Fig. 6. Level IV ecoregions of the Lake Erie Agricultural Systems for Environmental Quality (LEASEQ) study area; Michigan is classified to Level III only. Modified from electronic versions of the maps of Woods et al. (1998) and Omernik (1987).
Fig. 6. Level IV ecoregions of the Lake Erie Agricultural Systems for Environmental Quality (LEASEQ) study area; Michigan is classified to Level III only. Modified from electronic versions of the maps of Woods et al. (1998) and Omernik (1987).