Dispersal is common in mammals and can have an important role in shaping demography, genetics, distribution, and social structure. Dispersal entails potential costs but also potential benefits, and the dispersal decision is thought to be conditional; the potential disperser assesses prospects for su

Conservationists have long contended, largely in impressionistic terms, that 70 years of American dam building and water diversion have destroyed the biological richness of the Colorado River delta, a key nursery of marine life at the end of the Southwest's great watercourse. Now researchers have co

Social group structure often has consequences for individual fitness and ecological and evolutionary processes, but group structure is not fixed because of demographic processes: individuals die, disperse or are recruited into social groups. Thus, it is important to understand how demographic social

Natural populations are composed of individuals that vary in their morphological traits, timing and interactions. The distribution of a trait can be described by several dimensions, or mathematical moments-mean, variance, skew and kurtosis. Shifts in the distribution of a trait across these moments

Our study shows that variation in individual phenology affects fecundity in three phenologically distinct montane species, and that pollen limitation may be more influential than conspecific density. Our results suggest that individual-level changes in phenology are important to consider for underst

Noccaea caerulescens (formerly Thlaspi caerulescens, Brassicaceae) is a model species for studying the genetics and physiology of metal hyperaccumulation and is economically valuable for phytoremediation. Its growth and survival under varying natural conditions remain relatively unstudied but such i

Abstract I studied the relationships among energy availability, female visitation rates, and male display rates in Broad-tailed Hummingbirds (Selasphorus platycercus). Feeders contained 10%, 20%, or 30% sucrose solutions; female visitation rates and male hummingbird display rates were measured. Disp

In the present report are discussed the partial results of extensive collections of Tipuloidea that were taken in the vicinity of Gothic, Gunnison Co., Colorado, in 1934, chiefly by Mrs. Alexander and the writer. It is hoped that we will be able to make a detailed survey of the crane-flies of the en

AbstractThe persistence of threatened wildlife species depends on successful conservation and restoration of habitats, but climate change and other stressors make these tasks increasingly challenging. Applying climate change vulnerability analyses to contemporary wildlife management can be difficult

Published data concerning the standard weight in lake trout ( Salvelinus namaycush ) and brown trout ( Salmo trutta ) have been established. The standard weights were used to compute relative weights for data collected in the spring and summer of 2011 for brown trout and lake trout in the Blue Mesa

The project Feral Hues and Invasive Pigments (FH&IP) addresses the role of spontaneous urban plants (aka weeds) through ecosocial art, with the goal of reducing human alienation from plant life and land in urban and disturbed habitats. Hands-on work with spontaneous urban plants through ecosocial ar

The nests, with one exception, have been placed on horizontal limbs of a distance of from five to fifteen feet out from the trunk of the tree, and from seven to thirty feet high. On July 15, 1907, a nest containing young just hatched was found placed about seven feet up, and in, next to the body of

Gunnison prairie dogs have been shown to produce alarm calls that incorporate information about predators [Slobodchikoff et al., Anim. Behav. 42, 713–719 (1991)], such as the species of predator and also a description of the color and general size of the predator. The alarm calls contain a series of

Journal Article Acidification and Salamander Recruitment Get access John Harte, John Harte Energy and Resources Group, University of California, Berkeley, CA 94720 Search for other works by this author on: Oxford Academic Google Scholar Erika Hoffman Erika Hoffman Energy and Resources Group, Univers

Quantifying physiological stress in wild animals is essential for understanding their health, reproductive success, and survival in a variable environment. The yellow-bellied marmot (Marmota flaviventer) study at the Rocky Mountain Biological Laboratory near Crested Butte, Colorado, USA is the world

In the absence of incontrovertible performance data in support of, or opposition to, school vouchers, court decisions on their legality become increasingly important. Analysis of legal challenges provides a rich opportunity for scholars and policymakers to follow arguments for or against their posit