Rainbow trout diet and invertebrate drift data from 2012-2015 for the Colorado River, Grand Canyon, Arizona

These data were compiled to explore the foraging ecology of Rainbow Trout (Oncorhynchus mykiss) in the Colorado River, Grand Canyon, Arizona. These data represent samples characterizing the availability of drifting invertebrate prey (hereafter, drift) and use of these invertebrate prey by rainbow trout determined by gut samples (hereafter, diets). Drift and diet sampling occurred in five distinct reaches downstream of Glen Canyon Dam (river kilometer (rkm) from the dam): (I) rkm 16.3-21.7; (II) rkm 52.8-58.3; (III) rkm 86.6-91.9; (IV) rkm 122.0-123.6; and (V) rkm 127.1-129.6. Samples were taken on 12 trips in April, July, September and January from April 2012 through January 2015. The aquatic prey base consists...

Categories: Data; Tags: Aquatic Biology, Arizona, Bayesian discrete choice model, Colorado River, Ecology, All tags... Geography, Glen Canyon Dam, Grand Canyon, Information Sciences, New Zealand mudsnail, USGS Science Data Catalog (SDC), amphipod crustacean, aquatic Diptera, aquatic biology, aquatic ecosystems, aquatic prey, aquatic worms, biota, black flies, crustaceans, diet, discrete choice models, drift, drifting invertebrate prey, ecological processes, ecology, field sampling, forage, foraging, gut samples, invertebrate drift, invertebrates, mathematical modeling, midges, predation, predator, prey, prey selection, rainbow trout, samples, sampling, worms, Fewer tags

Environmental, biological, and leaf litter decomposition data in the Colorado River downstream of Glen Canyon Dam between 1998 and 2022

Yes, all data values are reasonable and within the valid range for measurement. The data release consists of 15 tabular data files (csv). These data were compiled to compare patterns and potential drivers of leaf litter decomposition in the Colorado River downstream of Glen Canyon Dam between 1998 and 2022. Objective(s) of our study were to compare the breakdown of cottonwood (Populus fremontii), willow (Salix exigua), and salt cedar (Tamarix chinensis) leaves to a previous decomposition experiment from 1998 (Pomeroy et al. 2000) that was conducted in the context of much cooler water temperatures, higher phosphorus concentrations, lower New Zealand mudsnail densities, and salt cedar litter that was unaffected by...

Categories: Data; Tags: Aquatic Biology, Arizona, Colorado River, Ecology, Geography, All tags... Glen Canyon Dam, Hydrology, Information Sciences, Lake Powell, New Zealand mudsnail, Populus fremontii, Salix exigua, Tamarix chinensis, USGS Science Data Catalog (SDC), USGS:6500d7ead34ed30c20580390, Water Resources, air temperature, beetle, biochemistry, biomass, biota, climatologyMeteorologyAtmosphere, community composition, community ecology, cottonwood, data release, decay rates, decomposition, detritus, environment, field data, field experiments, field sampling, growth, inlandWaters, invasive species, invertebrates, laboratory experiments, leaf, leaf litter, leaf litter chemistry, leaf litter mass, leaf mass, leaf nutrient content, leaf pack, litter, nutrient content (water), phosphorus, physicochemical variable, population and community ecology, relative abundance analysis, reservoir storage, river ecosystems, saltcedar, stream discharge, vegetation, warming, water chemistry, water nutrient data, water temperature, willow, Fewer tags