Experimental ecologists have frequently used cages to facilitate their understanding of ecological systems. This has been particularly true of ecologists studying aphids and other small insects, and a variety of cage designs have been described, ranging from small screened tents to sleeve cages to c

Research Article| August 01, 1945 STRUCTURE OF THE RED CREEK AREA, FREMONT COUNTY, COLORADO ALBERT R GLOCKZIN; ALBERT R GLOCKZIN 3219 KEATS STREET, SAN DIEGO, CALIF.; SCHOOL OF GEOLOGY, LOUISIANA STATE UNIVERSITY, BATON ROUGE, LA. Search for other works by this author on: GSW Google Scholar CHALMER

material.It is in good demand at prices up to $x2 per unit of tungsten-trioxide, making 70 per cent.ore worth $840 per ton.The following paragraphs describe some of these gold and tungsten deposits in the southwestern part of the county, in the vicinity of Eldora and Nederland, from data obtained du

The Colorado River provides water to 40 million people in the U.S. Southwest, with river basin spanning 250,000 square miles (647,497 km2). Quantitative water rights assigned to U.S. states, Mexico, and tribes in the Colorado Basin exceed annual streamflows. Climate change is expected to limit strea

AbstractFitness trade‐offs are a foundation of ecological and evolutionary theory because trade‐offs can explain life history variation, phenotypic plasticity, and the existence of polyphenisms.Using a 32‐year mark‐recapture dataset on lifetime fitness for 1093 adult Arizona tiger salamanders (Ambys

AbstractIron geochemistry of the sediments and interstitial waters of the Roaring River alluvial fan in the Rocky Mountain National Park, Colorado was studied using a chemical equilibria approach. Large concentrations of colloidal Fe in the filterable Fe of the interstitial waters results in conside

Open top chambers (OTCs) are a popular method for studying the biological effects of climate change through passive heating, but their effects on biotic interactions are poorly understood, especially for pollination. Here we use the subalpine plants Delphinium nuttallianum and Potentilla pulcherrima

In ecological speciation, incipient species diverge due to natural selection that is ecologically based. In flowering plants, different pollinators could mediate that selection (pollinator-mediated divergent selection) or other features of the environment that differ between habitats of 2 species co

AbstractThe Upper Gunnison Basin (UGB), Colorado, is a montane region characterized by unusual physiography and topographic isolation. Excavations of three caves in the UGB provide one of the most diverse records of high-elevation late Quaternary vertebrates in North America. The localities, Haystac

The phenology of vegetation, namely leaf-out and senescence, can influence the Earth’s climate over regional spatial scales and long time periods (e.g., over 30 years or more), in addition to microclimates over local spatial scales and shorter time periods (weeks to months). However, the effects of

BENT, A. C. 1942. Life histories of North American flycatchers, larks, swallows and their allies. U.S. Natl. Mus. Bull. 179. BUDD, L. F., R. B. AREND, J. W. HURST, AND V. H. ANDERSON. 1979. Fort Bliss environmental analysis and impact assessment. Photographic Interpretation Corporation, Hanover, New

Pollinator exclusion bags for small herbaceous plants are much more convenient to apply and remove if their bottom edge is made in the form of a cloth tunnel loaded with sand to conform to the terrain. Damage and inadvertent selfing of flowers are minimized.

The observations during 3 years and four separate visits to the localities through the season indicate that Dr Tinkham may have observed the rarely heard virginal or, more probably, normal disturbance-induced flights of females during the early part of the adult season and at times of the day when m

the total precipitation falls as snow from October through May. As spring advances, snow disappears progressively from lower to higher elevations, and from south slopes first. The varied topography of the Forest is typical of the southern Rocky Mountains. The western portion of the Forest is charact

Caloric equivalents for aboveground parts of Rocky Mountain subalpine and alpine herbaceous plants averaged 4,859 cal/g ash-free oven-dry weight. Ash content averaged 9.8% for 17 forbs. Both caloric content and ash content ranged higher than values for alpine species from New Hampshire.

While inundated, small ponds (< 1000 m2 area) account for disproportionately large contributions of CO2 efflux to the global carbon budget and also store carbon in anoxic sediments. However, pond hydrology is shifting toward increasingly dry conditions in alpine and temperate zones, which might lead

important in situ technique, a conclusive analysis of in situ data to determine the References density dependence of emigration and CORKUM, L. D. 1978.The influence of density and immigration of benthic stream inverte-behavioural type on the active entry of two mayfly species (Ephemeroptera) into th