1. USDA‐ARSWater Quality & Ecology Research UnitNational Sedimentation Lab. 598 McElroy Dr. Oxford MS 38655 USA
2. Crop, Soil, and Environmental Sciences Dep.Univ. of Arkansas Fayetteville AR 72701 USA
3. US National Park ServiceBuffalo River 402 N. Walnut, Suite 136 Harrison AR 72601 USA
4. Dep. of BiologyCenter for Reservoir and Aquatic Systems Research One Bear Place #97388 Waco TX 76798 USA