1,559 results — type: Student Paper
Sex ratio and reproductive success along elevational gradients of gynodioecious populations of <i>Geranium richardsonii</i>
We studied the sex-ratio and reproductive success of gynodioecious populations of Geranium richardsonii along elevational gradients near Gothic, Colorado. Gynodioecious means that the species produces hermaphrodite and female plants. The hermaphrodites have male (anthers and pollen) and female (ovul
Morph- and sex-specific differences in corticosterone of Arizona tiger salamanders (<i>Ambystoma mavortium nebulosum</i>)
Chronic stress can have detrimental effects on long-term health of amphibians. Sex and morph may cause variation in stress within salamanders such as the Arizona tiger salamaders (Ambystoma mavortium nebulosum) at the Mexican Cut Nature Preserve due to differences in biotic or abiotic conditions (
Tolerance of <i>Ambystoma tigrinum</i> larvae to spring water from a mining area; or, "the canary in the mind
Pollen thieving and pollen limitation in gynodioecious <i>Polemonium foliosissimum</i> (Polemoniaceae)
The limitation of pollen available to pollinators and visitors alike may potentially direct pollinator visitation choice as well as the plant’s ability to provide pollen rewards, nectar rewards, and plant defense mechanisms. Such trade-offs exist in Polemonium foliosissimum A. Gray (Polemoniaceae) a
East River water usage problems: effects of current and proposed management practices
Behavior of nesting red-tail hawks
The prey preferences of two different aquatic beetle larvae
Field studies on <i>Peromyscus maniculatus</i>
Benefits of ant attendance for aphid colonies of varying density
Benefits between species engaged in mutualistic interactions are often dependent on ecological context. For instance, in mutualisms in which aphids exchange food for ant protection from predators, the degree of benefit that aphids receive from ants depends on the presence of other arthropod predator
Report on bumblebee project
Studies of predation of 2nd and 4th instar <i>Chaoborus americanus</i> on two prey species in light and dark
Observations at the kettle ponds
On love and war among the sedges: observations on the interrelation between water striders (Gerridae) and pond vegetation
A short study of selected feeding behaviors in <i>Ambystoma tigrinum</i>
An analysis of the effects of the Keystone Mine effluent on the benthic invertebrates in Coal Creek, Gunnison County, Colorado
Assessing the impacts of long-term pan trapping on native bee populations in sub-alpine ecosystems
Pollination by native bees is an essential ecosystem service in both natural and agricultural systems. During the last several decades, there have been reported declines in native bee populations worldwide. Due to recent declines, there is an increasing need for standardized population monitoring pr
Patterns of sap-foraging on willows (<i>Salix spp.i</i>) by a keystone species: the Red-naped Sapsucker (<i>Sphyrapicus nuchalis</i>)
The Red-naped Sapsucker (Sphyrapicus nuchalis) is a keystone species in montane/subalpine ecosystems of the Rocky Mountains of Colorado. By excavating nest cavities in aspen trees and sap wells in willow shrubs, sapsuckers indirectly provide nest holes and food, respectively, to many other species.