Southwest Biological Science Center

Filter Total Items: 15
Array of three single-frequency side-looking acoustic-Doppler profilers used to measure suspended-sediment concentration
March 24, 2017

DATA RELEASE - Channel Mapping of the Colorado River in Grand Canyon National Park, Arizona - May 2009, river miles 29 to 62

Bathymetric, topographic, and grain-size data were collected in May 2009 along a 33-mi reach of the Colorado River in Grand Canyon National Park, Arizona. Channel bathymetry was mapped using multibeam and singlebeam echosounders, subaerial topography was mapped using ground-based total-stations, and bed-sediment grain-size data were collected using an underwater digital microscope system.

Grasses and woody plants growing along river with walls on Grand Canyon visible to one side.
March 22, 2017

DATA RELEASE - Southwestern Riparian Plant Trait Matrix, Colorado River, Grand Canyon, Arizona, 2014 - 2016

This dataset contains information on the physical traits and environmental tolerances of plant species occurring along the lower Colorado River through Grand Canyon. Data for the matrix were compiled from published scientific papers, unpublished reports, plant fact sheets, existing trait databases, regional floras, and plant guides.

Brown, sediment-laden water of the Paria River mixes with the clear water of the Colorado River
January 31, 2017

Discharge, Sediment, and Water Quality Monitoring Application

This link launches the Grand Canyon Monitoring and Research Center’s discharge, sediment and water quality monitoring application gateway.  Sediment and water quality information can be accessed from here for our on-going monitoring taking place across the Southwest U.S.

Sandbar on the bank of the Colorado River in Grand Canyon
January 30, 2017

Grand Canyon Sandbar Monitoring

Several applications related to the Grand Canyon Monitoring and Research Center’s long-term sandbar monitoring project can be accessed here, including the sandbar area and volume tool and applications highlighting changes to sandbars as a result of High-Flow Events (HFEs) conducted by Glen Canyon Dam near Page, Arizona.

Several people on a raft going through muddy rapids.
January 23, 2017

Grand Canyon Citizen Science Story Map

This story map application provides an interactive map showing light trap locations along the Colorado River as well as other content further describing this Citizen Science initiative. Data are currently available for the years 2012 through 2014, with more recent efforts coming soon.

Small, green adult fly on the Colorado River, Grand Canyon.
January 19, 2017

Grand Canyon Aquatic Ecology Web Application

This application allows for the exploration of a select set of insect emergence data collected as part of a citizen science project initiated by the Grand Canyon Monitoring and Research Center (GCMRC).  Data present in this application relate to a recent BioScience publication from USGS scientists and collaborators that investigated the effects of dam operations on downstream aquatic insects.

Woody plant species growing on a sand dune along the Colorado River in Grand Canyon.
January 3, 2017

DATA RELEASE - Community-level riparian plant traits, Colorado River, Grand Canyon, 2013-2015

Data were compiled based on field observations and available literature. Field data were collected on sandbars along the Colorado River through Grand Canyon between river miles 0 and 226 and included plant cover and trait measurements. Plant height and photosynthetic pathway were gleaned from the literature. Trait values were converted to a community-level value.

Close-up of prickly pear flower that is fully open.
January 2, 2017

DATA RELEASE - Population Attributes Red Eared Slider Japan

These data are compiled from published studies of various subspecies of the slider turtle (Trachemys scripta) from throughout the native range of the species in the United States. Data include sample sizes of adult male and female turtles as well as various estimates of their body size.

USGS researcher on small boat holding the end of a net used to capture insects in the water.
January 2, 2017

DATA RELEASE - Stream Drift Sampling in Arizona, 2014

Data were compiled from field drift collections and from a meta-analysis of published drift literature. Field data were collected in 2014 from the Colorado River downstream of Glen Canyon Dam, Arizona. Data represent flow meter measurements taken at the mouth and adjacent to a drift net, and suspended solids concentrations collected by the drift net, over varying net deployment durations.

Vegetation Drought response index screenshot
December 14, 2016

RAMPS Climate Partitioning Tool

The purpose of this application is to aid sampling efforts along climate gradients for a geographic region of interest. Examples of potential uses of this tool include: sampling plant materials for common garden studies, establishing common garden arrays, establishing vegetation transects, or banking seed for native plant conservation.

Image: Arizona Upland Plant Community in the Sonoran Desert
December 14, 2016

RAMPS Seed Selection Tool

The purpose of this application is to aid seed selection efforts of restoration and revegetation practitioners by matching the climate of georeferenced seed sources to potential target sites. 

Image: Sandbar on the Colorado River in Grand Canyon
December 10, 2016

Digital Grain Size Calculator

This is a free tool, working through your web browser, to calculate the particle size distribution of grains within digital photographs of sediment and other granular material. This is an implementation of the method of Buscombe (2013). Log in, upload your images, and download your particle size statistics.