It is suggested that basal metabolic rate is not an appropriate measure of the metabolic activity of free-ranging animals because basal metabolism is a stage on a food-deprivation curve.

Understanding the causes and consequences of population fluctuations is a central goal of ecology. We used demographic data from a long-term (1990–2008) study and matrix population models to investigate factors and processes influencing the dynamics and persistence of a golden-mantled ground squirre

This study is

A district in central Colorado is described in which coals of various ranks occur in a restricted area. Some of these coals have been altered by the intrusion of laccoliths whereas others have been affected only by minor folding. The individual effects of heat and pressure in the development of anth

Abstract The frequency and type of dyadic social interactions individuals partake in has important fitness consequences. Social network analysis is an effective tool to quantify the complexity and consequences of these behaviors on the individual level. Less work has used social networks to quantify

Early-flowering species may be especially susceptible to occasional pollen limitation and, therefore, may benefit from a mixed-mating strategy that provides reproductive assurance. We studied cleistogamous (CL) and chasmogamous (CH) fruit set of spring-flowering Viola praemorsa Dougl. ex Lindl. alon

The novel hypothesis that endophyte symbiosis promotes host fitness under flooded conditions, contributing to niche differentiation between the two bluegrass species is investigated, demonstrating an overall benefit of fungal symbiosis in this system.

Abstract The increase of structural growth rates to compensate for a poor initial body condition, defined as compensatory growth, may have physiological costs, but little is known about its effects on individual fitness in the wild. Yellow-bellied marmots (Marmota flaviventer) are obligate hibernato

Assessing benthic invertebrate community responses to multiple stressors is necessary to improve the success of restoration and biomonitoring projects. Results of mesocosm and field experiments were integrated to predict how benthic macroinvertebrate communities would recover following the removal o

Primers for 10 microsatellite loci developed specifically to amplify low quantity and quality DNA for Gunnison Sage-grouse were found to have levels of variability ranging from two to seven alleles, although one locus revealed significant departures from Hardy–Weinberg equilibrium.

The results indicate that the North Fork Gunnison River has been primarily braided in its lower reaches during the past few hundred years, although the channel planform tends toward a single-thread channel during decades of lower precipitation and discharge.

AbstractUnderstanding the amount of variation in functional traits between closely related species within guilds is critical for understanding links between community composition and ecosystem processes. Nutrient excretion is an important link between animals and their environments, and aquatic inve

The golden-mantled ground squirrel (Citellus lateralis lateralis) and the least chipmunk (Eutamias minimus consobrinus) were studied in the mountains of west central Colorado where the two species are sympatric and display marked similarities in habitat selection, life cycles and general behavior pa

Abstract Oviposition and diapause behavior were compared among populations of Colorado potato beetle, Leptinotarsa decemlineata (Say), from six locations in 1994 and 1995. Locations ranged from Winnipeg, Manitoba (49° 49′ N), to Rosemount in east central Minnesota (44° 44′ N). Newly emerged first su

Organismal phenotypes often co-vary with environmental variables across broad geographic ranges. Less is known about the extent to which phenotypes match local conditions when multiple biotic and abiotic stressors vary at fine spatial scales. Bittercress (Brassicaceae: Cardamine cordifolia), a peren

Over the past two decades, thermochronological studies have greatlyincreased our knowledge of the Cenozoic evolution of the Colorado Plateau(western United States). There has been particular interest in the southwesternpart of the plateau, leading to debate regarding the timing of uplift andfluvial