A vegetation classification based on a combination of concepts and methods developed by Braun-Blanquet and Daubenmire was used to identify 37 tentative forest habitat types on the Gunnison National Forest. Woodland habitat types comprised two series with a total of 3 habitat types, and forest habita

AbstractAs climate changes and populations grow, groundwater sustainability is becoming increasingly important. Hydrogeologic models, which are based on a conceptual understanding of the subsurface, are crucial tools for informing decisions. Conceptual models of the subsurface incorporate knowledge

The distributions of pocket gopher species in Colorado are contiguously allopatric. The pattern has been attributed to competitive exclusion, perhaps due to aggression toward the broad—niche species by more narrow—niche species. This study tested for differences in aggressiveness between the narrow—

Recent work has demonstrated that the presence or abundance of specific genotypes, populations, species

Climate change is simultaneously increasing carbon dioxide concentrations ([CO 2 ]) and temperature. These factors could interact to influence plant physiology and performance. Alternatively, increased [CO 2 ] may offset costs associated with elevated temperatures. Furthermore, the interaction betwe

Abstract Many species produce individually specific vocalizations and sociality is a hypothesized driver of such individuality. Previous studies of how social variation influenced individuality focused on colonial or non-colonial avian species, and how social group size influenced individuality in s

Accepted Article Species responses to climate change depend on environment, genetics, and interactions among these factors. Intraspecific cytotype (ploidy level) variation is a common type of genetic variation in many species. However, the importance of intraspecific cytotype variation in determinin

Abstract Biogeochemical exports of C, N, S and H 2 from watersheds are modulated by the activity of microorganisms that function over micron scales. This disparity of scales presents a substantial challenge for development of predictive models describing watershed function. Here, we tested the hypot

A newly discovered dinosaur tracksite in the Upper Cretaceous Dakota Group of southeastern Colorado preserves tracks attributable to ornithopod, theropod, and possibly ankylosaurid dinosaurs. Minimally 79 tracks occur at the site, and are comprised predominantly of ornithopod prints preserved as nat

Hummingbirds, with their impressive flight ability and competitive aerial contests, make ideal candidates for applying a mechanistic approach to studying community structure. Because flight costs are influenced by abiotic factors that change systematically with altitude, elevational gradients provid

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Research Article| April 01, 1965 Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado C VANCE HAYNES, JR. C VANCE HAYNES, JR. Dept. Geology, University of Arizona, Tucson, Ariz. Search for other works by this author on: GSW Google Scholar GSA Bulletin (196

Research Article| November 01, 1953 GEOLOGY OF THE WEST-CENTRAL PART OF THE GUNNISON PLATEAU, UTAH CLYDE T HARDY; CLYDE T HARDY UTAH STATE AGRICULTURAL COLLEGE, LOGAN, UTAH; U. S. GEOLOGICAL SURVEY, WASHINGTON, D. C. Search for other works by this author on: GSW Google Scholar HOWARD D ZELLER HOWARD

Riparian zones often provide more food or nesting resources than surrounding ecosystems and thus support more species or a greater abundance of birds. However, the extent to which the positive effects of riparian zones extend into adjoining habitats has rarely been investigated. We examined bird spe

AbstractWe present meteorology and snow observation data collected at sites in the southwestern Colorado Rocky Mountains (USA) over three consecutive water years with different amounts of snow water equivalent (SWE) accumulation: A year with above average SWE (2019), a year with average SWE (2020),

Two new species of harpellid gut fungi (Zygomycota: Trichomycetes) are described from the hindguts of mayfly nymphs inhabiting high altitude Rocky Mountain streams: the new genus and species Legeriosimilis tricaudata living in Ameletus sp. (Siphlonuridae), and the new species Glotzia coloradense fro

Research Article| April 01, 1988 Sevier-age ramp-style thrust faults at Cedar Mountain, northwestern San Rafael swell (Colorado Plateau), Emery County, Utah K. R. Neuhauser K. R. Neuhauser 1Department of Earth Sciences, P.O. Box 179, Fort Hays State University, Hays, Kansas 67601 Search for other wo

Evaluating the interactions between above- and below-ground processes is important to understand and quantify how ecosystems respond differently to atmospheric forcings and/or perturbations and how this depends on their intrinsic characteristics and heterogeneity. Improving such understanding is par

Miller-Struttmann et al. (2015) suggest that, in a North American alpine ecosystem, reduced flower abundance due to climate change has driven the evolution of shorter tongues in two bumble bee species. We accept the evidence that tongue length has decreased, but are unconvinced by the adaptive expla