353 results — type: Thesis
From populations to ecosystems: studies on the distribution, importance, and loss of biodiversity
The ecological effects of nectar robbers, with an emphasis on the reproductive biology of <i>Corydalis caseana</i>
Conditional mutualism: density- and quality-dependent responses of aphids to tending by ants
Postpollination selection, progeny performance, and the genetic basis of fitness traits in <i>Aquilegia caerulea</i> (Ranunculaceae)
The influence of thermal energy exchange on the activity and energetics of yellow-bellied marmots
The social and genetic organization of populations of Weidemeyer's admiral butterfly
Spatial and Behavioral Foraging Patterns and Diet Selectivity in the Social Yellow-Bellied Marmot
Bumble bee queen plasticity and social regulation of traits
Studies on the physiological states of wild-caught organisms are essential to uncovering the links between ecological and physiological processes. Bumble bee queens emerge from overwintering in the spring. At this time, queens develop their ovaries and search for a nest site in which to start a colo
Pennsylvanian and Permian Stratigraphy in the Crested Butte Quadrangle, Gunnison County, Colorado
Revisiting Edward R. Warren: A Century of Beaver <i>Castor canadensis</I> Occupancy near Crested Butte, Colorado
Patterns of natural avalanche activity associated with new snow water equivalence and upper atmospheric wind direction and speed in the mountains surrounding Gothic, Colorado
Snowfall, temperature and wind are three factors that quickly change avalanche conditions. Ridge-top winds have been used to assess avalanche conditions with mixed success due to high variability. Few analyses have tested the effect upper atmospheric winds have on avalanche conditions. This study at
Behavioral ecology of silver prospectors in late 19th century Gothic, Colorado: migration, group formation and central place foraging
Ecological contexts of balancing selection in nature
How genetic variation is maintained in the face of persistent natural selection is a central question in evolutionary biology. Here, I leverage a focal polymorphism, leaf chemical profile in a perennial wildflower (Boechera stricta, Brassicaceae) to investigate the ecological and genetic mechanisms
Adaptation and diversification of bluebells <i>Mertensia</i> spp., Boranginaceae
Flowering phenology marks the transition from vegetative growth to reproduction and exposes plants to seasonally varying selective environments during flowering. Life-history trade- offs between time and size at reproduction suggest that early-flowering species should generally be smaller than late-
Floral reward strategies, visitor behavior, and plant reproductive outcomes
Many plants that bear hidden or recessed floral nectar experience nectar robbing, the removal of nectar by a floral visitor through holes pierced in the corolla. Although robbing can reduce plant reproductive success, many studies fail to find such effects. We outline three mechanistic hypotheses th
Effects of Climate Change on Plants, Pollinators and Their Interactions
1. Changes from historic weather patterns have affected the phenology of many organisms worldwide. Altered phenology can introduce organisms to novel abiotic conditions during growth and modify species interactions, both of which could drive changes in reproduction. 2. We explored how climate change
Experimental manipulations involving the determinants of the spatial distribution of benthic invertebrates within the substrate of stony streams
Vegetation of the iron hills complex, Powderhorn, Colorado: an environmental basline inventory and analysis
Dimensions of difference: Multi-scale consequences of trait variation in bumble bees
Body size is arguably one of the most important traits influencing the physiology and ecology of animals. Shifts in animal body size have been observed in response to climate change, including in bumble bees (Bombus spp.). Bumble bee size shifts have occurred concurrently with the precipitous popula