Coop Unit header: lakes and mountains

About the Walters Lab

We conduct ecological research to help understand, manage, and conserve fishery resources and habitat in Wyoming. Our works seeks to gain insight into the structure and functioning of aquatic ecosystems and how these ecosystems are altered by natural and anthropogenic disturbance. Much of our research involves fish that are of conservation concern and as a result the studies are set in a management context and have repercussions for natural resource decision-making. Our goal is to conduct research that has relevance to both basic ecological theory and fisheries management.


  • Wind River Lake

    Biodiversity is controlled by both biotic and abiotic factors, and the balance and number of these controls remains a key question in understanding ecological community assembly. In lakes in the Wind River range we are exploring the interactive effects of nutrient availability and predators on zooplankton communities. More

  • Managers and ecologists are under increased pressure to quantify and understand how stressors, natural or anthropogenic, interact to affect environmental and ecological change. While most research has focused on single stressor effects at one level of ecological organization, it is becoming increasingly apparent that many ecosystems are affected by multiple stressors and their interactions can have negative consequences across many levels of ecological organization. Yet, comparatively few studies have assessed the interactive effects of multiple stressors, especially in freshwater ecosystems. More

  • finescale dace

    Specific ecological factors that influence persistence of cold-adapted, native cyprinids on the western Great Plains are not well understood. Finescale Dace (Chrosomus neogaeus) occur in isolated, glacial relict populations in this region, where they are classified as either state endangered or a Species of Greatest Conservation Need in Wyoming, South Dakota, and Nebraska. More

  • Main stem, LaBarge Creek

    This study will evaluate survival and emigration of stocked Colorado River cutthroat trout in conjunction with multiple rearing/ stocking strategies. Fish movement will be monitored using Passive Integrated Transponder (PIT) tags over a period of two years. More

  • Rainbow trout (Oncorhynchus mykiss) have been widely introduced across the world, and in some locations hybridize with native trout. We are studying the extent of hybridization between native Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) and rainbow trout in the North Fork Shoshone River drainage near Cody, Wyoming. More