2,139 results — topic: RMBL & Gothic
Snow-free Growing Degree-days Early Season Timeseries
These are maps of annual accumulated spring snow-free growing potential (snow-free growing degree days, SFGDD) for the Upper Gunnison domain, derived from daily maximum air temperature maps interpolated from weather station and microclimate sensor data combined with Landsat-derived estimates of the
Snow-free Freezing Degree-days 0-60 days Post-snow Timeseries
These are maps of annual accumulated snow-free freezing potential (freezing degree days, FDD) for the Upper Gunnison domain, derived from daily minimum temperature maps interpolated from weather station and microclimate sensor data combined with Landsat-derived estimates of the timing of seasonal sn
The Ecology of Social Behavior
Ecological Aspects of Social Evolution
Functional Testing of Aquatic Biota for Estimating Hazards of Chemicals
Rehabilitating Damaged Ecosystems
Comparative pollen and dye transfers by pollinators of Delphinium nelsonii
Why do Ephemerella nymphs scorpion posture: a "ghost of predation past"?
The behavior of intact Ephemerella infrequens (Ephemeroptera, Ephemerellidae) and Ephemerella with cerci amputated was observed in response to encounters with live predaceous stoneflies (Megarcys signata, Plecoptera: Perlodidae), tethered-live and tethered-model predators, freshly excised stonefly a
Why predaceous stoneflies do not aggregate with their prey
Distribution and species diversity of trichomycete gut fungi in aquatic insect larvae in two Rocky Mountain streams
At least 20 species of Trichomycetes (Zygomycotina) were dissected from the hindguts and peritrophic membranes of larval Diptera (Simuliidae, Chironomidae), Ephemeroptera, and Plecoptera in two high-altitude streams, and the trichomycete species diversity in the two streams was compared. Periodic sa
Discovery of sexual reproduction in an unusual new species of Stachylina (Trichomycetes)
Pollination biology in the Snowy Mountains of Australia, with comparisons with montane Colorado, USA
AbstractVarious aspects of the pollination biology of the alpine flora of Kosciusko National Park, NSW, were examined from late December 1983 until the end of March 1984, including flowering phenology, corolla tube lengths, flower colour, ultraviolet reflectance patterns, visitation rates to the flo
Male body size and mating success in swarms of the mayfly <i>Epeorus longimanus</i>
Spatial and temporal patterns of floral inconstancy in plants and populations of Ipomopsis aggregata (Polemoniaceae)
To determine whether floral part numbers (merism) vary over time within inflorescences, we scored merism of the petals, sepals, stamens, and carpels of all flowers on the same 10 plants of Ipomopsis aggregata in three Colorado populations weekly through most of the 1984 flowering season. At least on
Red-naped sapsuckers feeding at willows: possible keystone herbivores
Herbivory by leaf miners in response to experimental shading of a native crucifer
Adaptation at specific loci. V. Metabolically adjacent enzyme loci may have very distinct experiences of selective pressures
Abstract The polymorphic phosphoglucomutase (PGM) and glucose-6-phosphate dehydrogenase (G6PD) loci have been studied in parallel to experimental work on the phosphoglucose isomerase (PGI) polymorphism in Colias butterflies. PGI, PGM and G6PD are also autosomal in Colias. PGM and G6PD are loosely li
Rates of nectar feeding in butterflies: effects of sex, size, age, and sugar concentration
Rates of ingestion of sucrose varied with sucrose concentration and butterfly sex, age and size for Speyeria mormonia Edwards (Lepidoptera: Nymphalidae). Peak rates of ingestion occurred between sucrose concentrations of 30% and 40%, as predicted by previous theory. Males fed at a faster rate than d
Spatial segregation of the sexes of dioecious plants
Several recent studies have shown that males and females in some populations of dioecious plants are spatially segregated with respect to an environmental gradient. The inference is often made that such spatial segregation of the sexes (SSS) is favored by selection because it reduces competition bet