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6/08/2017 | 2:15 PM - 2:30 PM | CONNECTING BASELINE CONDITIONS TO POTENTIAL RECOVERY OF MACROINVERTEBRATE AND DIATOM COMMUNITIES DUE TO RESTORATION THROUGH THE DELAWARE RIVER WATERSHED INITIATIVE | 302A

CONNECTING BASELINE CONDITIONS TO POTENTIAL RECOVERY OF MACROINVERTEBRATE AND DIATOM COMMUNITIES DUE TO RESTORATION THROUGH THE DELAWARE RIVER WATERSHED INITIATIVE

To date there have been few comprehensive studies on the effects of large-scale Agricultural Best Management Practice (BMP) programs in multiple small (<100 km2) watersheds or how reductions in runoff correlate with the responses of biota. Our research addresses measuring the success of restoration with potential improvements in stream quality and aquatic biota. We sampled benthic macroinvertebrates and diatoms near agricultural BMPs in the Delaware River Basin with agricultural land use ranging from 0-83%. We performed ordinations, threshold analysis and metacommunity analysis to relate macroinvertebrates and diatoms to stressors, and to determine co-occurrence (assemblage types). Macroinvertebrate genera show shifts in presence along a land use/ habitat gradient, with many of the same genera co-occurring in watersheds with high and medium percentages of forested land. Diatom species exhibit relationships with nutrient concentrations and also show co-occurrence patterns according to land use and nutrient gradients. Knowledge of specific macroinvertebrate and diatom responses to watershed conditions as well as co-occurring assemblages will provide a basis for predicting how improvements in water and habitat quality in these watersheds will be correlated with increased biotic integrity on a local scale.

C16 Restoration Ecology
S21 Practical applications of metacommunity theory in stream and river management
S26 Biological Success Criteria for Stream Restoration Project Monitoring: Are We Still Searching for Unicorns?

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Presenters/Authors

Stefanie Kroll (), Academy of Natural Sciences of Drexel University, sak345@drexel.edu;