Data Releases

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. The study reach is located from river miles 29 to 62 at the confluence of the Colorado and Little Colorado Rivers. Channel bathymetry was mapped using multibeam and singlebeam echosounders, subaerial topography was mapped using ground...

This dataset contains water chemistry measurements from groundwater wells at the Cottonwood Lake Study Area, Statesman County, North Dakota.

This dataset contains water chemistry information for wetlands at the Cottonwood Lake Study Area, Statesman County, North Dakota.

In situ specific conductance, pH, and temperature measurements from wells at the Cottonwood Lake Study Area, Statesman County, North Dakota, 1987 to 1995.

This CSV file contains landscape factors representing anthropogenic disturbances to stream habitats summarized within local and network stream catchments of Southeast Alaska. The source datasets compiled and attributed to spatial units were identified as being: (1) meaningful for assessing fluvial fish habitat; (2) consistent across the entire study area in the way that they were...

This CSV file contains cumulative fish habitat condition index (HCI) scores generated for river reaches of the conterminous United States as well as indices generated specifically for four spatial units including local and network catchments and 90 m local and network buffers of river reaches. Note that the cumulative HCI score is determined from limiting index scores generated for the...

This geodatabase contains 90 meter buffers of streams within the National Hydrography Dataset Plus Version 1 (NHDPlusV1). These buffers were developed by converting NHDPlusV1 flowlines to a 30m grid, then running a euclidean allocation function in ArcPy to generate buffer zones. For flowlines representing artificial paths within NHD area river polygons, buffers extend from the outside...

The U.S. Geological Survey Coastal and Marine Geology Program has actively collected geophysical and sedimentological data in the northern Gulf of Mexico for several decades, including shallow subsurface data in the form of high-resolution seismic-reflection profiles (HRSP). Prior to the mid-1990s most HRSP data were collected in analog format as paper rolls of continuous profiles up to...

The true color aerial imagery contained in this mosaic was collected on September 19, 2016 with a Phase One iXU-R 180 aerial camera system. The mission was flown at approximately 1,200 meters above ground level resulting in a ground sample distance of 0.15 meters/pixel (6"/pixel). The area of interest is the Emiquon Preserve and surrounding areas and the mosaic is for the purpose of...

Montane plant communities throughout the world have responded to changes in precipitation and temperature regimes by shifting both margins and core distributional ranges upward in elevation. Continued warmer, drier climate conditions have been documented and are predicted to increase in high-elevation areas in Hawaii, consistent with climate change effects reported in other environments...

In 2010, a mass mortality of pufferfish in Hawaii was dominated by Arothron hispidus showing aberrant neurological behaviors. Using pathology, toxinology, and field surveys, we implicated a series of novel, polar, marine toxins as a likely cause of this mass mortality. Our findings are striking in that 1) a marine toxin was associated with a kill of a fish species that is, itself, toxic...

These data were compiled based on field observations and available literature. Field observations of plant cover were made in September and October of 2013 and 2014, while trait measurements were made in September and October of 2014 and 2015. Field data was collected on sandbars along the Colorado River through Grand Canyon between river miles 0 and 226. Field measurements of specific...