Impacts of early snow removal and frost on the reproductive success of <i>Delphinium nuttallianum</i>
Anthropogenic climate change is causing increases in global average temperature, changes in seasonality, and altered precipitation patterns which are linked to upslope range shifts, population declines, and phenological changes. This study examines the impacts of climate induced changes in snowmelt
A Presence-Only Species Distribution Model Comparison Predicting the Distribution of the Amphibian Chytrid Fungus <i>(Batrachochytrium dendrobatidis)</i>
Geology, Site Formation, and Geochronology
which, following Aldenderfer (2006), we define as locations at elevations greater than 2,500 meters above sea level (e.g.,
The Effects of Nest-Site Selection and Microclimate on Nest Survival in Sparrows of High Elevation
Nest-site selection is important in the determination of nest success in several bird species (Holway 1991, Wells and Fuhlendorf 2005). Birds that nest in high elevation breeding sites are under greater environmental stress, making it even more crucial for individuals to choose nest microclimates th
The effects of nutrient addition on floral characters and pollination in two subalpine plants, <i>Ipomopsis aggregata</i> and <i>Linum lewisii</i>
Habitat patch use, density, and territoriality of American Red Squirrels (<i>Tamiasciurus hudsonicus</i>) in the southwestern Rocky Mountains, Colorado
American Red Squirrels (Tamiasciurus hudsonicus) inhabit patches of conifer trees, relying upon the cones for food. They stockpile cones in middens, which are large piles of cones at the base of trees, and exhibit territorial behavior (alarm and warning calls) to protect their midden from squirrels
The Mountaineer Site: A Folsom Winter Camp in the Rockies
A decade's worth of archaeological research conducted at Mountaineer, a Paleoindian campsite in Colorado's Upper Gunnison Basin. Extensively excavated, long-term Folsom occupations with evidence of built structures. The site provides a record of stone tool manufacture and use offering insight into a
Effects of <i>Helianthella quinquenervis</i> Extrafloral Nectaries on Ant Abundance and Community Structure
The beneficial effects of ants to myrmecophilous species is well established, but there is little empirical evidence demonstrating the benefits of such interactions for ants. The intent of this experiment was to determine how ants are affected by their interaction with the Aspen sunflower (Helianthe
Wind-driven seed dispersal differentially promotes seed trapping and retention across alpine plants
2000-2019 in the Colorado River Basin and Beyond
In the first two decades of the 21st century the Colorado River Basin suffered a prolonged drought. Remarkably this period turned out to be arguably the most innovative and collaborative in the basin's modern human history. This working paper reviews the major events of the period, highlights some o
Allelopathic effects of <i>Serphidium tridentatum</i> upon two species of annuals
Temporal ecology of a subalpine ecosystem: Plant communities, plant-pollinator interactions, & climate change.
Ecological systems are inherently dynamic, and a primary way in which they are dynamic is through time. Individual organisms, populations, communities, species interactions, and ecosystem functions all follow a temporal progression from the past, to the present, and into the future. This temporal pr
Changes in Aspen Communities Over 30 Year in Gunnison County, Colorado
Individual variation in plant traits drives species interactions, ecosystem functioning, and responses to global change.
Ecologists have long sought to understand the processes that lead to the riotous diversity in communities of organisms that inhabit disparate climates and landscapes. Such a diversity of traits leads to a diversity of interactions among species in natural communities, which in turn generates a diver