Hematological values for free-ranging yellow-bellied marmots
Hematological values of scuirids are adaptive to environmental factors such as hypoxia of burrows and high altitude, temperature and metabolic rate, and PCV of yellow-bellied marmots evidences an adaptive response to high altitude when compared to the closely-related woodchuck, M. monax.
Sodium enriched nectar shapes plant–pollinator interactions in a subalpine meadow
Many plants have evolved nutrient rewards to attract pollinators to flowers, but most research has focused on the sugar content of floral nectar resources. Concentrations of sodium in floral nectar (a micronutrient in low concentrations in nectar) can vary substantially both among and within co-occu
The Nonnative Iowa Darter (Etheostoma exile) Established in the Yampa River, Colorado, and Green River, Utah
The Iowa darter (Etheostoma exile) was first captured in Little Yampa Canyon, Yampa River, Colorado, by electrofishing in autumn 2003, and abundance of this nonnative species increased during 2004–2007. The Iowa darter also expanded downstream 229 river km, based on captures of young fish in a drift
Mt. Antero Mineral Locality, Chaffee County, Colorado: Past & Present
Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsMark Ivan JacobsonMark I. Jacobson, an oil exploration geophysicist, last wrote for ROCKS AND MINERALS on “A Lithium-Bearing Pegmatite in the Clear Creek District, Clear Creek County, Colorado” (Novem
Post-Depositional Fluid Flow in Jurassic Sandstones of the Uncompahgre Uplift: Insights From Magnetic Fabrics
The anisotropy of magnetic susceptibility (AMS) in sedimentary rocks results from depositional, diagenetic, syn- and post-sedimentary processes that affect magnetic grains. Some studies have also shown the potential role played by post-depositional fluid flow in detrital and carbonate formations. He
Comment on Cognition-mediated evolution of low-quality floral nectars.
Nachev et al (Reports, 6 January 2017, p. 75) present dilute nectar in bat-pollinated plants as "paradoxical" because bats prefer concentrated nectar, but paradox disappears with realistic assumptions about nectar evolution. We argue that they make unrealistic assumptions about the cognitive abiliti
Hyporheic Oxygen Dynamics in the East River, Colorado: Insights From an In‐Situ, High Frequency Time Series During Two Distinct Flow Seasons
AbstractDissolved oxygen (DO) is critical for aquatic ecosystems, however, few studies have focused on the long‐term DO dynamics in hyporheic zones, which are a function of both transport (hydrologic exchange between river and hyporheic zone) and uptake by biogeochemical reactions or respiration. We
Hidden Processes During Seasonal Isolation of a High-Altitude Watershed
Biogeochemical processes capable of altering global carbon systems occur frequently in Earth’s Critical Zone–the area spanning from vegetation canopy to saturated bedrock–yet many of these phenomena are difficult to detect. Observation of these processes is limited by the seasonal inaccessibility of
On ptilolite, a new mineral [from Jefferson County, Colorado]
Thermal infrared shadow-hiding in GOES-R ABI imagery: snow and forest temperature observations from the SnowEx 2020 Grand Mesa field campaign
Abstract. The high temporal resolution of thermal infrared imagery from the Geostationary Operational Environmental Satellites R-series (GOES-R) presents an opportunity to observe mountain snow and forest temperatures over the full diurnal cycle. However, the off-nadir views of these imagers may imp
Ecologists seek to turn tide on Colorado River
Geology of the uranium deposits in the Cochetopa mining district, Saguache and Gunnison counties, Colorado
Vein-type uranium deposits of geologic interest and commercial significance occur in the Cochetopa mining district, Saguache and Gunnison Counties, Colorado. The uranium minerals in these deposits have been precipitated from hypogene solutions probably related to Tertiary igneous activity in the dis
Genetic basis of an adaptive polymorphism controlling butterfly silver iridescence
The behavior of strong and weak centromeres at second anaphase of Drosophila melanogaster
The volcanology, petrology and geochronology of the Fish canyon magmatic system, San Juan volcanic field, U.S.A
Il y a 28 millions d'années, l'une des plus grandes éruptions explosives connues a pris place dans le sud de l'actuel Colorado, aux États-Unis. Cette unité volcanique, dénommée le Tuf de Fish Canyon, ainsi que deux plus petites éruptions qui lui sont associées, ont permis d'étudier plusieurs aspects
Gunnison Tunnel: Engineering History of an Early American Reclamation Project
This paper describes the surveying, engineering, and construction operations performed in the construction of the Gunnison Tunnel for the Gunnison River Diversion Project. The Gunnison Tunnel, which diverts water from the Gunnison River to the Uncompahgre Valley, was one of the first major engineeri
Is the propensity to emit alarm calls associated with health status?
The production and structure of animal signals may depend on an individual’s health status and may provide more than one type of information to receivers. While alarm calls are not typically viewed as health condition dependent, recent studies have suggested that their structure, and pos- sibly thei
Mountain Ute and Earliest Numic Colonization of the Southern Rocky Mountains: A New Perspective from the Sue Site (5JA421), North Park, Colorado
River: One Man's Journey down the Colorado, Source to Sea
Future Colorado River Basin Drought and Surplus
Historical and future drought and surplus periods in the Colorado River basin are evaluated based on eight climate scenarios. Unimpaired streamflow from 17 stations in the Colorado River are evaluated based on U.S. Geological Survey, Bureau of Reclamation, and Coupled Modeled Intercomparison Project