Abstract Ecological communities often show changes in populations and their interactions over time. To date, however, it has been challenging to effectively untangle the mechanisms shaping such dynamics. One approach that has yet to be fully explored is to treat the varying structure of empirical co

This study evaluated the relations between eggshell conductance to water vapor ($$G_{H_{2}O}$$), daily water loss ($$\dot{M}_{H_{2}O}$$), embryonic water content near pipping, and hatching success in red-winged blackbird eggs under conditions of natural incubation. All embryos hatched successfully o

Plasma melatonin concentrations were measured throughout bouts of hibernation in marmots maintained in a short photoperiod (light-dark 8:16) and ambient temperature of 5 or 15 degrees C. Melatonin concentration was also measured in two animals maintained in constant darkness. As an animal entered hi

Abstract Fear and anxiety may be adaptive responses to life-threatening situations, and animals may communicate fear to others vocally. A fundamental understanding of fear inducing sounds is important for both wildlife conservation and management because it helps us understand how to design repellen

Dispersal rates for freshwater invertebrates are often inferred from population genetic data. Although genetic approaches can indicate the amount of isolation in natural populations, departures from an equilibrium between drift and gene flow often lead to biased gene flow estimates. I investigated t

Wildland–urban interface (WUI) homeowners who do not mitigate the wildfire risk on their properties impose a negative externality on society. To reduce the social costs of wildfire and incentivise homeowners to take action, cost sharing programs seek to reduce the barriers that impede wildfire risk

We determined the genetic basis of several traits related to overall fitness of Aquilegia caerulea, a perennial herb of the Rocky Mountains in western North America. To obtain measures of heritability relevant to the evolutionary potential of wild populations, we performed full and partial diallel c

Research Article| July 01, 1969 Carbon Isotopes in Pelites of the Precambrian Uncompahgre Formation, Needle Mountains, Colorado FRED BARKER; FRED BARKER U.S. Geological Survey, Denver, Colorado Search for other works by this author on: GSW Google Scholar IRVING FRIEDMAN IRVING FRIEDMAN U.S. Geologic

Many organisms living in heterogeneous environments alter behaviors or morphology when developing in the presence of predators and subsequently incur associated sublethal fitness costs. Larvae of the mayfly Callibaetis ferrugineus hageni develop in beaver ponds with or without trout predators. We ex

crossing in an intimate plant herbivore relationship. I. Does outcrossing provide an escape from herbivores adapted to the parent plant? Evolution 48:454-464. TEMPLETON, A. R., AND B. READ. 1984. Factors eliminating inbreeding depression in a captive herd of Speke's gazelle. Zoo Biol. 3:177-199. VER

Adriana A. Maldonado- Temporal variation in environmental conditions affects population growth directly via its impact Chaparro,1,2,3* Daniel T. on vital rates, and indirectly through induced variation in demographic structure and phenotypic Blumstein,1,4 Kenneth B. Armitage5 trait distributions. We

Abstract Snowmelt is the principal control on the timing and magnitude of water flow through mountainous watersheds. The effects of precipitation type and quantity on storage and hydrologic connectivity in mountainous systems were explored by combining the observed stable isotope δ18O in rain, snow,

Overall, male bumble bees are common and capable pollinators of G. parryi and in some years and sites could be more important than workers, and animal sexes may differ in their pollinator performance in other systems.

This study was conceived to detect skin mites in social mammals through real-time qPCR, and to estimate taxonomic Demodex and further Prostigmata mite relationships in different host species by comparing sequences from two genes: mitochondrial 16S rRNA and nuclear 18S rRNA. We determined the mite pr

Characterizing biologically relevant stream disturbance regimes is challenging, but necessary to answer questions about disturbance effects on ecological processes. No universally accepted approach exists for characterizing stream disturbance regimes. Our goal was to evaluate approaches that can be

The decline in abundance of the newly recognized Gunnison sage grouse (Centro- cercus minimus) in southwestern Colorado is thought to be linked to loss and fragmentation of its habitat, sagebrush (Artemisia) vegetation. We documented changes in sagebrush-dominated areas between the 1950s and 1990s b