1. Dep. of Soil and Crop Sciences Colorado State Univ. Fort Collins CO 80523 USA
2. USDA‐ARS, Water Management and Systems Research Unit Fort Collins CO 80526 USA
3. USDA‐ARS, Soil Management and Sugar Beet Research Unit Fort Collins CO 80526 USA
4. Graduate Degree Program in Ecology Colorado State Univ. Fort Collins CO 80523 USA
5. Boulder County Parks and Open Space Longmont CO 80503 USA
6. Dep. of Biology Colorado State Univ. Fort Collins CO 80523 USA