2,570 results — type: Journal Article
Evolution and genomic basis of the plant penetrating ovipositor: a key morphological trait in herbivorous Drosophilidae
Herbivorous insects are extraordinarily diverse, yet are found in only one-third of insect orders. This skew may result from barriers to plant colonization, coupled with phylogenetic constraint on plant-colonizing adaptations. The plant-penetrating ovipositor, however, is one trait that surmounts ho
The Cedar Mesa scarp of the Colorado Plateau - Example of the morphodynamics of scarps in arid regions
Carbon Dioxide Concentrations and Efflux from Permanent, Semi-Permanent, and Temporary Subalpine Ponds
Small ponds account for a disproportionately high percentage of carbon dioxide emissions relative to their small surface area. It is therefore crucial to understand carbon flow in these ponds to refine the current global carbon budget, especially because climate change is affecting pond hydrology. H
Heritable variation in the timing of emergence from hibernation
Global climate change is shifting many species’ phenology and has created a number of key mismatches that threaten population persistence. Phenotypically plastic individuals have the ability to adjust their behaviour in response to environmental change. While phe- notypic plasticity may serve as a b
Indirect fitness benefits do not compensate for the loss of direct fitness in yellow-bellied marmots
Abstract The contribution of indirect fitness to inclusive fitness is expected to increase as the reproductive skew increases, with indirect fitness being the only component of inclusive fitness of sterile individuals in eusocial species. However, the relative contribution of indirect fitness to inc
Salinity Trends in Surface Waters of the Upper Colorado River Basin, Colorado
AbstractDissolved‐solids data collected in the Upper Colorado River Basin upstream from Cameo, Colorado, and in the Gunnison River Basin were analyzed for trends in flow‐adjusted dissolved‐solids concentrations and loads for water years 1970 to 1993, 1980 to 1993, and 1986 to 1993. Trend results for
Audubon-Albion stock, Boulder County, Colorado
Research Article| December 01, 1940 Audubon-Albion stock, Boulder County, Colorado ERNEST E. WAHLSTROM ERNEST E. WAHLSTROM Search for other works by this author on: GSW Google Scholar GSA Bulletin (1940) 51 (12_1): 1789–1820. https://doi.org/10.1130/GSAB-51-1789 Article history received: 23 Feb 1940
Selection of floral traits by pollinators and seed predators during sequential life history stages
AbstractOrganismal traits often influence fitness via interactions with multiple species. That selection is not necessarily predictable from pairwise interactions, such as when interactions occur during different life cycle stages. Theoretically, directional selection during two sequential episodes
Ecosystem-size relationships of river populations and communities
Knowledge of ecosystem-size influences on river populations and communities is integral to the balancing of human and environmental needs for water. The multiple dimensions of dendritic river networks complicate understanding of ecosystem-size influences, but could be resolved by the development of
Habitat preference of an herbivore shapes the habitat distribution of its host plant
Plant distributions can be limited by habitat-biased herbivory, but the proximate causes of such biases are rarely known. Distinguishing plant-centric from herbivore-centric mechanisms driving differential herbivory between habitats is difficult without experimental manipulation of both plants and h
Spatiotemporal variation in survival of male yellow-bellied marmots
Variation in vital demographic (e.g., survival) rates of males can influence population dynamics, but the male segment of the population is frequently ignored in ecological studies of mammals. Using a multistate capturemark-recapture model and 44 years of data from 17 habitat patches, we investigate
Specific-gene studies of evolutionary mechanisms in an age of genome-wide surveying
The molecular tools of genomics have great power to reveal patterns of genetic difference within or among species, but must be complemented by the mechanistic study of the genetic variants found if these variants’ evolutionary meaning is to be well understood. Central to this purpose is knowledge of
Climate and multiple dimensions of plant diversity regulate ecosystem carbon exchange along an elevational gradient
Abstract The impacts of warming on communities and ecosystems are predicted to be significant in mountain ecosystems because physiological processes, including rates of carbon (C) cycling, are often more temperature‐sensitive in colder environments. Plant biodiversity can also influence C exchange,
Does locomotor ability influence flight initiation distance in yellow-bellied marmots?
Flight initiation distance (FID) is the distance between a potential threat and the point at which a potential prey flees. Animals may modify their FID to compensate for increased risk generated by external/extrinsic factors such as habitat type, visibility, group size, time of year, predator-approa
Pre- and post-ingestive defenses affect larval feeding on a lethal invasive host plant
Abstract Evolutionary traps arise when organisms use novel, low‐quality or even lethal resources based on previously reliable cues. Persistence of such maladaptive interactions depends not only on how individuals locate important resources, such as host plants, but also the mechanisms underlying poo
Marmots do not consistently use their left eye to respond to an approaching threat but those that did fled sooner
In many vertebrates, the brain's right hemisphere which is connected to the left visual field specializes in the processing of information about threats while the left hemisphere which is connected to the right visual field specializes in the processing of information about conspecifics. This is ref
Virtually the Same? Evaluating the Effectiveness of Remote Undergraduate Research Experiences
In-person undergraduate research experiences (UREs) promote students’ integration into careers in life science research. In 2020, the COVID-19 pandemic prompted institutions hosting summer URE programs to offer them remotely, raising questions about whether undergraduates who participate in remote r
Plant sex and induced responses independently influence herbivore performance, natural enemies and aphid-tending ants
Plant sexual dimorphism and induced responses to herbivore damage independently influenced Herbivore performance and the composition of arthropod communities at higher trophic levels.
Predicting regime shifts in flow of the Gunnison River under changing climate conditions
Key Points Projected Gunnison River Basin hydrology is fitted to a gamma distribution Changes to wet and dry regime characteristics under climate change are expected Changing regime characteristics may influence future reservoir operations
Metamunirite, a new anhydrous sodium metavanadate from San Miguel County, Colorado
AbstractMetamunirite, β-NaVO3, is found in cavities in sandstone in San Miguel County, Colorado, occurring as fine, fibrous, colourless needles. X-ray powder and precession photographs show the crystals to be orthorhombic, space group Pnma, with a = 14.134(7), b = 3.648(2), c = 5.357(2) Å. They are
