495 results — topic: Freshwater Ecology
Anion Data for the East River Watershed, Colorado (2014-2022)
The anion data for the East River Watershed, Colorado, consists of fluoride, chloride, sulfate, nitrate, and phosphate concentrations collected at multiple, long-term monitoring sites that include stream, groundwater, and spring sampling locations. These locations represent important and/or unique e
Signed Candidate Conservation Agreement with Assurances with its included Certifcate of Inclusion template for Gunnison Sage Grouse
Richard Coleman. US DOI Fish and Wildlife Services. October 19, 2006.
Aquatic invertebrate colonization on moss substrates in a mountain valley river
The effects of stream water acidification on the behavior and mortality of two groups of benthic invertebrate larvae, <i>B. bicaudatus</i> and Hydropsychidae
Community stability in a small pond system
Effects of altered aquatic ecosystems on the surrounding floral community
Fluctuation in a Rocky Mountain population of salamanders: anthropogenic acidification or natural variation?
We monitored the demographics of the salamander Ambystoma tigrinum nebulosum as part of a community-wide study on the effects of acidification in sub-alpine (elevation 3600 m) ponds in central Colorado. A decline in A. t. nebulosum at this site from 1982 to 1988 has been hypothesized to result from
Competition and intraguild predation between two species of caddisfly larvae (Trichoptera) in permanent and semi-permanent high elevation ponds
Behavioral response of <i>Ambystoma tigrinum</i>, tiger salamanders, to varying temperatures and oxygen levels
Trends in Ecology
Mechanisms of intra and interspecific interference between larval stoneflies.
Consequences of larval intraspecific interference to stonefly growth and fecundity
Habitat selection by stream-dwelling predatory stoneflies
Patterns of substrate size preference of predatory stoneflies were measured in a western Colorado, USA, stream and associations were examined between substrates and other physical and biological variables. Predatory Megarcys signata (Perlodidae) were found disproportionately on large stones that wer
A field test of resource depression by predatory stonefly larvae
Experiments were conducted in two Rocky Mountain streams (Gunnison County, Colorado) to determine the context within which predatory stonefly larvae locally depress their prey populations. In feeding trials where no migration of prey (Baetis bicaudatus, Ephemeroptera) was allowed from flow-through b
Can microbial species with a cosmopolitan distribution become extinct?
Test of copper toxicity on caddisfly larvae
Symposium: Dynamics of Ecology of Free-Living Protozoa
Epibiotic euglenoid flagellates increase the susceptibility of some zooplankton to fish predation
The phototrophic flagellate, Colacium vesiculosum (Euglenophyceae), lives externally on freshwater zooplankton. In experimental tanks with supplemental nutrients, epibiotic prevalence (% zooplankters infested with epibionts) was not consistently different from control. Experimental reduction of the
Stonefly predation along a hydraulic gradient: a test of the harsh-benign hypothesis
SUMMARY. 1. Microhabitat preferences of predatory stoneflies and four prey taxa were assessed by taking benthic samples along a hydraulic gradient in a Black Forest stream in West Germany. Densities of predator and prey species were estimated at twenty‐one hydraulic regimes.2. Enclosures containing