1. Josh Scott Shaun Lacy John Robbins Owen Means

2. Introduction Objectives Hypothesis Methods Results Discussion

3. Landowner objective: Learning potential for small fishery Suitable pond conditions?

4. Determine composition of sediment % organic matter % water content Estimate density and diversity of macroinvertebrates

5. High water content equally throughout sediment High organic mater in the top portion of the sediment High concentrations of macroinvertebrates in the shallow areas

6. Jones’ pond (15 miles southeast of Moscow) KB-Core Triplicate samples at (2.7 m) Measured, weighed, dried, fried Ekman dredge Triplicate samples at (2.7 m) Sub-sampled, counted organisms

7. KB-Cores Higher water content deeper in the sediment Higher organic content deeper in the sediment

8. Ekman dredge Replicate123Mean (#/m^2)SDSE Oligochaete652443288916444487525.9368549.7239577.20 Table 1. Macroinvertebrate density from Ekman dredge sampling of Jones’ pond Latah Co., Idaho 2008.

9. Sediment 4cm of sediment accumulation since pond was filled Water content higher at bottom of sediment Opposite of normal results Macroinvertebrate Only oligochaetes were found 87,526/m 2 (SE 39,577) EPA rating in Detroit River 5,000/m 2 (Ciborowski 2008) Farm ponds in Philippines 0-32,000/m 2 Density positively correlated with high nutrients and/or organic matter (Simpson et al. 2004)

10. Nutrient inputs Difficult to control nutrient inflow from agriculture Try to reduce fertilizer use on and around property Resample to determine sediment accumulation

11. Ciborowski, J. 2008. [Online] Detroit River-Western Lake Erie Basin Indicator Project. Available: http://www.epa.gov/med/grosseile_site/indicators/oligoch aetes.html Simpson, I.C., Roger, P.A., Oficial, R., and Grant, I.F. 2004. Density and composition of aquatic oligochaete populations in different farmers’ ricefields. Biology and Fertility of Soils 16: 34-40.