Bromus tectorum L. (Cheatgrass, Downy brome) is an invasive grass that has recently proliferated within the Gunnison Basin, Colorado. This study examined variation in germination in response to temperature, storage duration, and habitat. Four populations within the Gunnison Basin were sampled. Seeds

A simple, portable system for the automatic collection and storage of radio-telemetry data is described. Data on the deep body temperatures of two yellow-bellied marmots (Marmota flaviventris) are reported for 3 days. The advent of radio-telemetry has initiated the development of few automated recor

Across animal systems, abiotic environmental features, including timing of seasonal events and weather patterns, affect fitness. An individual’s degree of social integration also has fitness consequences, but we lack an understanding of how abiotic features relate to patterns of individual sociality

Abstract High elevation and latitude ecosystems are experiencing high levels of anthropogenic atmospheric warming. Climate warming may directly change soil microbial activity and alter ecosystem carbon dynamics and productivity, but increasing evidence suggests these responses may depend on other bi

Hematological values of scuirids are adaptive to environmental factors such as hypoxia of burrows and high altitude, temperature and metabolic rate, and PCV of yellow-bellied marmots evidences an adaptive response to high altitude when compared to the closely-related woodchuck, M. monax.

Individual plants can modify the microenvironment within their spatial neighborhood. However, the consequences of microenvironment modification for demography and species interactions remain unclear at the community scale. In a study of co‐occurring alpine plants, we 1) determined the extent of spec

The Iowa darter (Etheostoma exile) was first captured in Little Yampa Canyon, Yampa River, Colorado, by electrofishing in autumn 2003, and abundance of this nonnative species increased during 2004–2007. The Iowa darter also expanded downstream 229 river km, based on captures of young fish in a drift

A spatially-distributed snow energy and mass balance model, updated with all available snowpack observations, is used to assess the potential for water augmentation by winter orographic cloud seeding in the Colorado River Basin. The modeling system outputs snow water equivalent (SWE) on a 1 km grid

Scent marking and piloerection behavior in social groups of the common marmoset Callithrixj.

Review of River Notes: A Natural and Human History of the Colorado. Wade Davis. 2012. Island Press. Pp. 176 $23.63 (Hardcover). ISBN 978‐1610913614.

Dale R. Lightfoot, Frank W. Eddy, The Effects of Environment and Culture on the Distribution of Prehistoric Dwellings at Chimney Rock Mesa, Colorado, The Geographical Journal, Vol. 159, No. 3 (Nov., 1993), pp. 291-305

The past two decades have seen a fluorescence of work at Paleoindian sites in Colorado’s Upper Gunnison Basin (UGB). This article presents and synthesizes the results of that work in two parts, the first, a landscape-scale analysis of 82 UGB Paleoindian components as reported in Colorado state site

(2001). Mineral Occurrences in the Leadville Limestone, Ouray County, Colorado. Rocks & Minerals: Vol. 76, No. 5, pp. 332-346.