1,923 results — topic: RMBL & Gothic
Rodents of Colorado in their economic relation /
As you are aware, I have been engaged for some time past in work, under your direction, on the control of rodents
Colorado River chronostratigraphy at Lee's Ferry, Arizona, and the Colorado Plateau bull's-eye of incision: REPLY
Karlstrom et al. (2013) raise two issues in their Comment related to aspects of the discussion in our paper (Pederson et al., 2013) about the Lee’s Ferry record and incision in the Colorado Plateau. We synthesize evidence for the bull’s-eye pattern of incision over the past 105 yr, finding that it d
Habitat selection in a fluctuating ground squirrel population: Density - dependence and fitness consequences
Investigating individual-based habitat settlement decisions is a central theme in ecology, yet studies that quantify density-dependent habitat selection or tie fitness to resource selection decisions remain rare. We quantified habitat selection in golden-mantled ground squirrels ( Callospermophilus
Maternal survival costs in an asocial mammal
Maternal characteristics, social dynamics, and environmental factors can all influence reproduction and survival and shape trade-offs that might arise between these components of fitness. Short-lived mammals like the golden-mantled ground squirrel (GMGS; Callospermophilus lateralis ) tend to maximiz
Facilitated diffusion in erythrocytes of additional mammals
The kinetics of both swelling and shrinking of erythrocytes of the yellow-bellied marmot, golden-mantled ground squirrel, chipmunk, deer mouse, long-tailed vole, montane vole and western jumping mouse indicate that glycerol, ethylene glycol, urea and thiourea penetrate by means of facilitated diffus
Why don't more hummingbird-pollinated flowers have dark-colored pollen?
This note derives from work done during an NSF predoctoral fellowship at the University of California, Santa Barbara (UCSB).
Historical fire regimes and contemporary fire effects within sagebrush habitats of Gunnison Sage‐grouse
AbstractThe historical role of fire in sagebrush (Artemisia tridentata) landscapes remains poorly understood, yet is important to inform management and conservation of obligate species such as the threatened Gunnison Sage‐grouse (GUSG; Centrocercus minimus). We reconstructed fire histories from tree
Agonistic and affiliative social relationships are associated with marmot docility but not boldness
All animals must face predation risks at some points in their lives and individuals may vary in how much risk they are willing to accept. While it is well recognized that sociality is a way to manage risks, and social group size effects are well studied, the specific ways in which different types of
Challenges and opportunities for collaborative adaptive management in forest landscape restoration
The Collaborative Forest Landscape Restoration Program (CFLRP) created the conditions for translating the idea of collaborative adaptive management (CAM) into practice. In theory, CAM engages stakeholders to collectively ‘learn by doing’ through a continuous cycle of goal-setting, implementing, moni
X-ray chemical imaging for assessing redox microsites within soils and sediments
Redox reactions underlie several biogeochemical processes and are typically spatiotemporally heterogeneous in soils and sediments. However, redox heterogeneity has yet to be incorporated into mainstream conceptualizations and modeling of soil biogeochemistry. Anoxic microsites, a defining feature of
Patch dynamics of a foraging assemblage of bees
The arrival-departure process of bees on flowers and the immigration-extinction process of species on islands are contrasted, and the value of the stochastic, species-level approach to community composition is briefly discussed.
Single-Well Push–Pull Tracer Test Analyses to Determine Aquifer Reactive Transport Parameters at a Former Uranium Mill Site (Grand Junction, Colorado)
At a former uranium mill site where tailings have been removed, prior work has determined several potential ongoing secondary uranium sources. These include locations with uranium sorbed to organic carbon, uranium in the unsaturated zone, and uranium associated with the presence of gypsum. To better
Cold-season precipitation sensitivity to microphysical parameterizations: hydrologic evaluations leveraging snow lidar datasets
Abstract Cloud microphysical processes are an important facet of atmospheric modeling, as they can control the initiation and rates of snowfall. Thus, parameterizations of these processes have important implications for modeling seasonal snow accumulation. We conduct experiments with the Weather Res
Patterns of genetic variation and local adaptation of a native herbivore to a lethal invasive plant
Understanding the evolutionary processes that influence fitness is critical to pre- dicting species' responses to selection. Interactions among evolutionary processes including gene flow, drift and the strength of selection can lead to either local adap- tation or maladaptation, especially in hetero
Context dependence of warming induced shifts in montane soil microbial functions
Abstract High elevation and latitude ecosystems are experiencing high levels of anthropogenic atmospheric warming. Climate warming may directly change soil microbial activity and alter ecosystem carbon dynamics and productivity, but increasing evidence suggests these responses may depend on other bi
Linking microenvironment modification to species interactions and demography in an alpine plant community
Individual plants can modify the microenvironment within their spatial neighborhood. However, the consequences of microenvironment modification for demography and species interactions remain unclear at the community scale. In a study of co‐occurring alpine plants, we 1) determined the extent of spec
Sources of Controversy in the Law of the Colorado River: An Upper Basin View
Automated recordings of body temperature from free-ranging yellow-bellied marmots
A simple, portable system for the automatic collection and storage of radio-telemetry data is described. Data on the deep body temperatures of two yellow-bellied marmots (Marmota flaviventris) are reported for 3 days. The advent of radio-telemetry has initiated the development of few automated recor
Polyphenism predicts actuarial senescence and lifespan in tiger salamanders
Actuarial senescence (called 'senescence' hereafter) often shows broad variation at the intraspecific level. Phenotypic plasticity likely plays a central role in among-individual heterogeneity in senescence rate (i.e. the rate of increase in mortality with age), although our knowledge on this subjec
Community context mediates effects of pollinator loss on seed production
Abstract A critical goal for ecologists is understanding how ongoing local and global species losses will affect ecosystem functions and services. Diversity–functioning relationships, which are well‐characterized in primary producer communities, are much less consistently predictable for ecosystem f
