This study investigates the efficacy of Conservation Reserve Program (CRP) and Conservation Reserve Enhancement Program (CREP) lands to support assemblages of three environmentally sensitive orders, Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies) (EPT) in the Kaskaskia River basin, a heavily impacted, predominantly agricultural watershed in central and southern Illinois. A total of 10,522 EPT specimens were examined from 84 sites across the basin during May and June of 2013-2015. Analysis of continuous data represented by 79 independent variables from geographic information system (GIS) and on-site assessment revealed five important variables associated with EPT richness: Link (number of first order tributaries), WT_Perm (soil permeability at the total catchment level), WT_Urban (urban land use at the total catchment level), Silt, and DO (dissolved oxygen). According to Akaike information criterion (AIC) importance values, Link and WT_Perm ranked the highest (1.00), followed by WT_Urban (0.99), and Silt (0.83). Individual percent contribution (% I) as determined by hierarchical partitioning placed DO third among the top five variables. The proportion of CRP/CREP lands ranked unexpectedly low in relative importance and % I contribution.
|Original language||English (US)|
|Title of host publication||Society for Freshwater Science 2016 Annual Meeting, Sacrament, California|
|State||Published - 2016|