Southwest Biological Science Center

Filter Total Items: 25
Multispectral, high resolution image of stretch of the Colorado River depicting overview of river, sand dune, and vegetation.
August 10, 2017

DATA RELEASE - Water Classification of The Colorado River Corridor, Grand Canyon, Arizona, 2013—Data

These data are classified maps of water in the Colorado River at a discharge of approximately 227 meters squared/second in Grand Canyon from Glen Canyon Dam to Pearce Ferry in Arizona. The data are derived from interpretation of multispectral high resolution airborne imagery that was acquired in May 2013.

Multispectral, high resolution image of stretch of the Colorado River depicting overview of river, sand dune, and vegetation.
August 10, 2017

DATA RELEASE - Riparian Vegetation Classification of the Colorado River Corridor, Grand Canyon, Arizona, 2013—Data

These data are classification maps of total riparian vegetation along the Colorado River in Grand Canyon from Glen Canyon Dam to Pearce Ferry in Arizona, and are derived from interpretation of multispectral high resolution airborne imagery acquired in May 2013.

The nonnative plant, Salsola, on a sand dune.
July 25, 2017

DATA RELEASE - Southwest Exotic Mapping Program (SWEMP) Database, 2007

The Southwest Exotic Plant Mapping Program (SWEMP) is a collaborative effort to compile and distribute regional data on the occurrence of non-native invasive plants in the southwestern U.S. The database represents the known sites of non-native invasive plant infestations within AZ and NM, and adjacent portions of CA, CO, NV and UT. These data were collected from 1911to 2006.

Adult roundtail chub
July 6, 2017

DATA RELEASE - Bioelectrical Impedance Analysis for an Endangered Desert Fish

These data were used to examine the effectiveness of a non-lethal tool (Bioelectrical Impedance Analysis) to estimate the physiological condition of endangered and threatened fishes in the Colorado River Basin. Humpback chub, bonytail, and roundtail Chub were subjected to different feeding trials to elicit a response in physiological condition.

Close-up of an Agassiz's desert tortoise with tortoise looking towards camera. Tortoise is on a rocky, arid hill slope.
June 22, 2017

DATA RELEASE - Desert Tortoise Reproductive Ecology and Precipitation, Mojave and Sonoran Deserts

Estimated precipitation data were compiled from 1995-2013 for sites near Palm Springs, CA and at Sugarloaf Mountain in the Tonto National Forest of AZ. We were interested in data for winter (October-March) and summer precipitation (June-September). These two periods are important for desert tortoise ecology since they trigger germination of food plants in the spring and in the summer.

Large Galapagos tortoise in a puddle. The tortoise's head and legs are inside its shell and it is looking straight ahead.
June 1, 2017

MODEL - Full Annual Cycle Bioenergetics Model of Migration Applied to Galapagos Tortoise

This code was created to run a bioenergetics-based model of movement for Galapagos tortoises. It calculates energetic surplus or deficit at a daily time scale based on inputted temperature (6 times a day) and NDVI value (a single value per days), as well as the mass of an individual. It then uses dynamic programming to determine the optimal timing of movement between two foraging habitats.

Soil profile in dryland region. The top of the horizon is a light brown and the bottom half of the horizon is darker in color.
May 24, 2017

DATA RELEASE - Automated Reference Toolset (ART)

These environmental raster covariate, geospatial vector data, and tabular data were compiled as input data for the Automated Reference Toolset (ART) algorithm. These data are a subset of all the environmental raster covariate data used in the ART algorithm.

A wild Galapagos tortoise surrounded by vegetation on Santa Cruz Island in the Galapagos archipelago.
May 24, 2017

DATA RELEASE - Full Annual Cycle Bioenergetics Model of Migration Applied to Galapagos Tortoises

Data on ambient-shade temperature, Normalized Difference Vegetation Index (NDVI) between February 1, 2010 and January 31, 2011 used for input onto a bioenergetics-based movement model for Galapagos turtles.

Looking down on the Colorado River in Grand Canyon. A submerged sandbar is adjacent to a sandy beach.
May 24, 2017

DATA RELEASE - Geomorphic Process from Topographic Form

These data were used for the development and validation of the automated workflow for mechanistic segregation of geomorphic transport mechanisms presented in the manuscript "Geomorphic Process from Topographic Form: Automating the Interpretation of Repeat Survey Data in River Valleys."

Close-up of cane bluestem grass seed head on the bank of the Colorado River in Grand Canyon.
May 24, 2017

DATA RELEASE - Plant Functional Traits, Colorado River, Grand Canyon, 2012-2014

Data were compiled or measured (depending on the trait) for 110 plant species which were documented in vegetation monitoring surveys in years 2012-2014 along the Colorado River through Grand Canyon National Park. New trait data were collected for specific leaf area, stem specific gravity, δ13C, δ15N, percent carbon and nitrogen, and carbon:nitrogen ratio.

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.