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Biology and Ecosystems
Learn more about research and monitoring on freshwater, terrestrial, and marine ecosystems and the fish and wildlife within them. Healthy ecosystems provide our society with essential ecosystem services, such as crop pollination, water and air purification, harvestable populations of fish and wildlife, soil replenishment, pest control, and nutrient cycling.
Data for "Comparison of size, terminal fall velocity and density of bighead, silver, and grass carp eggs for use in drift modeling"
Physical characteristics of the eggs as a function of post fertilization time. We recorded mean egg diameter and terminal fall velocity for eggs from each species during the first five hours of development, and at approximately 12 and 22 hours post fertilization.
Identifying the locations and causes of grizzly bear mortality is another key component in understanding the dynamics of this population. Over 80% of all documented bear mortalities are human-caused. Tracking human-caused bear deaths helps define patterns and trends that can direct management programs designed to reduce bear mortality.
Quantifying habitat benefits of channel reconfigurations on a highly regulated river system, Lower Missouri River, USA-Data
Depth and velocity grids centerpoints generated from hydrodynamic model (SRH-2D) simulations run for a range of discharges in the Fairview reach of the Yellowstone River, MT, the Miami and Lisbon-Jameson reaches of the Lower Missouri River.
5 datasets to underlie the bend-scale classification of Lower Missouri River. Classification was based on geomorphic and engineering variables for 257 bends from Sioux City, Iowa to the confluence with the Mississippi River near St. Louis, Missouri.
Polygon coverage of sand deposits from the 2011 Missouri River flood. The dataset covers 1,298 km of the Missouri River valley bottom from Gavins Point Dam in South Dakota to the confluence with the Mississippi River near St. Louis, Missouri.
Acoustic doppler current profiler raw measurements on the Missouri and Yellowstone rivers, 2000-2016, Columbia Environmental Research Center
Acoustic doppler current profiler (ADCP) measurements on the Missouri and Yellowstone Rivers between the years 2000 and 2016.
Invasive plant inventory sample locations and cover values for Missouri River bottoms.
Floral survey of 11 cliffs in the Manassas National Battlefield Park. We recorded 282 species in 194 genera and 83 families, including 23 newly documented species for the park. Locations of bluffs sampled. GIS data complement the USGS Data Series "A Floral Survey of Cliff Habitats along Bull Run at Manassas National Battlefield Park, Virginia" and accompanying Microsoft Access database.
These data support studies from 1997-2006 on potential toxicity of mercury concentrations within the lower Carson River system to piscivorous birds - snowy egrets, black-crowned night-herons, and double-crested cormorants.
USGS Southwest Repeat Photography Collection: Kanab Creek, southern Utah and northern Arizona, 1872-2010
This data release contains data, repeat images, and field notes collected from 80 repeat photography stakes along Kanab Creek 1872 and 2010. The Kanab Creek repeat photography collection is part of the USGS Southwest Repeat Photography Collection assembled over decades by USGS scientists Drs. Robert H. Webb and Raymond M. Turner and curated by the Southwest Biological Science Center.
The data set is a table of counts, with the rows being the transcripts detected in the samples in the experiment and the columns identifying the samples. Four mussles were exposed to normal freshwater and four mussels were exposed to high salinity (two ppt), for a period of seven days.
This guide to the vascular plants of Louisiana includes a database of plant characters, a search engine and plant images. Photographs include images of leaves, fruit, flower, stem, bark and other key identification features. Information about plants can be accessed by searching plant lists either by scientific name or common name.