Evolutionary adaptation can allow a population to persist in the face of a new environmental challenge. With many populations now threatened by environmental change, it is important to understand whether this process of evolutionary rescue is feasible under natural conditions, yet work on this topic

As climate change accelerates, low summer stream flows are becoming increasingly common in the Colorado Rocky Mountains, USA. The diatom Didymosphenia geminata (Lyngb.) M. Schmidt, typically observed under low-flow and low-P conditions, produces nuisance growth—persistent and extensive proliferation

Abstract In mountainous watersheds, floodplain sediments are typically characterized by gravel bed layers capped by an overlying soil unit that serves as a hotspot for biogeochemical reactivity. However, the influence of soil biogeochemistry on gravel bed underflow composition remains unclear, espec

Floodplain soils are vast reservoirs of organic carbon often attributed to anaerobic conditions that impose metabolic constraints on organic matter degradation. What remains elusive is how such metabolic constraints respond to dynamic flooding and drainage cycles characteristic of floodplain soils.

The confused taxonomic history of prunophilus (Papilionaceae) is discussed and its affinities with the morphologically similar L. ammophilus and other putative relatives within the L. ornatus complex and morphologically similar complexes are elucidated. Chemosystematic evidence of alkaloid compariso

Life histories of three species of Corixidae found only at altitudes over 2800 m were compared. The number of generations per year varied with altitude. Callicorixa audeni Hung. and Cenocorixa bifida Hung. had two or more generations a summer in montane ponds (below 3100 m) and only one generation a

The nonconsumptive effects of predators on prey include behavioral, physiological, and life-history changes that reduce the risk of predation but have associated energetic or fitness costs to prey individuals and populations. Biologists have documented such changes for a wide array of predator–prey

The prairie rattlesnake, Crotalus viridis Rafinesque, 1818, is available in large numbers in Weld Co., Colorado, and since virtually no information was available on parasitism of C. viridis, additional studies were made.

Although we found some evidence for the effect of a biotic interaction depending on abiotic conditions, it was only for one aspect of reproduction in one species, and it was in an unexpected direction. Our work highlights interactions between the abiotic and biotic components of the environment as a

Adaptation of E. minimus to the semiarid habitat has involved changes in response to acute and chronic heat and water stress which increase the time the chipmunks can survive exposures to high ambient temperature, regardless of water availability.

Abstract Despite the crucial role of bioaerosol particles (BAP) in our climate system, local ecosystems, and human health, our grasp on their atmospheric interactions is hampered by a lack of high‐resolution and long‐term data, which is essential for understanding their abundance and variability in

Levels of hybridization between related species can vary in response to evolutionary history or local environmental conditions, such as pollinators and abiotic factors, that affect reproductive isolation. Contact sites between the herbs Ipomopsis aggregata and Ipomopsis tenuituba vary in habitat typ

(2001). Mineral Occurrences in the Leadville Limestone, Ouray County, Colorado. Rocks & Minerals: Vol. 76, No. 5, pp. 332-346.

Crop ScienceVolume 45, Issue 1 cropsci2005.0413 p. 413-413 Registrations Of Cultivars Registration of ‘Grand Mesa’ Pinto Bean M.A. Brick, Corresponding Author M.A. Brick mbrick@lamar.colostate.edu Dep. of Soil and Crop Sciences, Colorado State Univ., Ft. Collins, CO, 80523Corresponding author (mbric

N the early development of a country rivers are useful mainly as avenues of travel. They are highways to the interior which lure the adventurer and the pioneer. Later, when the land becomes settled, they may or may not retain this primal use. Now protection is demanded from the ravages of the river,

Abstract Translocations have been used as a management tool for the federally threatened Gunnison sage‐grouse ( Centrocercus minimus ) but have not been rigorously evaluated. We estimated survival of translocated Gunnison sage‐grouse during the first year following release. Survival rates differed a