Location: National Soil Erosion Research Lab
2012 Annual Report
b) We will initiate and conduct streamside bioassays at selected locations in the St. Joseph River CEAP study sites in FY 2011 and FY 2012. The streamside bioassays will enable us to expose laboratory reared fishes and invertebrates to actual nutrient and pesticide mixtures that occur in the study watersheds. The test organisms have not experienced prior exposure to nutrient and pesticide mixtures. Thus the streamside bioassays enable us to evaluate how survival, growth, and reproductive characteristics of “naïve” stream organisms respond to the different nutrient and pesticide mixtures that occur among our study watersheds.
c) We will conduct ecological sampling of the St. Joseph River watershed study sites in FY 2011 through FY 2013 as described in Smiley et al. (2008) and Smiley et al. (2009). The additional three years of data collection will result in an eight year database on nutrients, pesticides, fishes, and invertebrates.
During FY12 we also conducted year two of biomarker surveys at four sites in the Cedar Creek Study Area and four sites in the Upper Big Walnut Creek Study Area to assess the effects of exposure to water from agricultural ditches on the biology of stream fishes. Preliminary analyses of relationships among water chemistry, habitat variables and aquatic communities have been made.