Reports
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 83829
Pharmaceuticals and personal care products in passive samplers at seven coastal sites off West Maui, Hawaiʻi:
Passive membrane samplers—semipermeable membrane devices and polar organic chemical integrative samplers—were deployed for 22 continuous days at 7 sites along the West Maui, Hawaiʻi, coastline in February and March 2017 to assess organic contaminants at shallow coral reef ecosystems from diverse upstream inputs. The distribution of organic compounds observed at these coastal sites showed considera
Authors
Pamela L. Campbell, Nancy G. Prouty, Curt D. Storlazzi
Groundwater and surface-water data collection for the Walla Walla River Basin, Washington, 2018–22
The semi-arid Walla Walla River Basin (WWRB) spans 1777 square miles in the states of Washington and Oregon and supports a diverse agricultural region as well as cities and rural communities that are partially reliant on groundwater. Historically, surface water and groundwater data have been collected in the WWRB by several entities including federal, state, local, and tribal governments; irrigati
Authors
Elisabeth T. Fasser, Sarah B. Dunn
Decision-making for managing harmful algal blooms
Cyanobacteria are a global water-quality
concern because these organisms can develop into
harmful blooms that affect ecologic, economic, and
public health.
U.S. Geological Survey scientists worked with
the New York State Office of Parks, Recreation
and Historic Preservation and the New York State
Department of Environmental Conservation to
develop a structured decision-making template for
managing
Authors
Jennifer L. Graham
Inventory of eelgrass (Zostera marina) and seaweeds at the end of the Alaska Peninsula, August–September 2012:
Coastal communities in Alaska are undergoing rapid environmental change from increasing temperatures and baseline data are needed to monitor potential impacts. We conducted the first surveys of the abundance and distribution of eelgrass (Zostera marina) and seaweeds in the western part of Izembek National Wildlife Refuge at the end of the Alaska Peninsula. Six embayments and two offshore islands w
Authors
David H. Ward, Kyle R. Hogrefe, Tyronne F. Donnelly, Neils C. Dau, Orville Lind, Kevin J. Payne, Sandra C. Lindstrom
Eelgrass (Zostera marina) and seaweed abundance along the coast of Nunivak Island, Yukon Delta National Wildlife Refuge, Alaska, 2010
Eelgrass (<em>Zostera marina</em>) is a highly productive seagrass that plays an essential role in the health of the estuarine and coastal ecosystems; however, information about its abundance and distribution is insufficient in the Bering Sea along the Yukon Delta National Wildlife Refuge. We inventoried the spatial extent and abundance of eelgrass and seaweed in Duchikthluk and Shoal bays on Nuni
Authors
David H. Ward, Kyle R. Hogrefe, Tyrone F. Donnelly, Lucretia L. Fairchild
Eelgrass (Zostera marina) and Seaweed Abundance along the Coast of Togiak National Wildlife Refuge, Alaska, 2008–10
We conducted a point-sampling survey to determine eelgrass (Zostera marina) and seaweed abundance in coastal waters adjacent to Togiak National Wildlife Refuge, Alaska, in July 2008–10. Eelgrass was known to be abundant in protected embayments of the southeastern Bering Sea and near the Togiak National Wildlife Refuge, but prior to this study, no systematic ground surveys had been conducted in the
Authors
David H. Ward, Kyle R. Hogrefe, Michael A. Swaim, Tyronne F. Donnelly, Lucretia L. Fairchild
Distribution of eelgrass (Zostera marina) in coastal waters adjacent to Togiak National Wildlife Refuge, Alaska
Declines in the distribution and abundance of seagrasses worldwide have prompted a need for baseline distribution maps of eelgrass (Zostera marina) in Alaska. We used high-resolution digital-color aerial photography and multi-spectral satellite imagery to map the distribution and spatial extent of eelgrass at 21 sites in coastal waters adjacent to Togiak National Wildlife Refuge (TNWR) in northwes
Authors
David H. Ward, Kyle R. Hogrefe, Tyronne F. Donnelly, Michael A. Swaim
Abundance and distribution of eelgrass (Zostera marina) and seaweeds at Izembek National Wildlife Refuge, Alaska, 2007–10
Eelgrass (Zostera marina) meadows are expansive along the lower Alaska Peninsula, supporting a rich diversity of marine life, yet little is known about their status and trends in the region. We tested techniques to inventory and monitor trends in the spatial extent and abundance of eelgrass in lagoons of the Izembek National Wildlife Refuge. We determined if Landsat imagery could be used to assess
Authors
David H. Ward, Kyle R. Hogrefe, Tyronne F. Donnelly, Lucretia L. Fairchild, Kristine M. Sowl, Sandra C. Lindstrom
Assessment of undiscovered conventional oil and gas resources of New Guinea, Papua Barat, Seram, and Timor-Leste, 2020
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered resource means of 1.8 billion barrels of oil and 129.5 trillion cubic feet of gas within New Guinea, Papua Barat, Seram, and Timor-Leste.
Authors
Christopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Geoffrey S. Ellis, Cheryl A. Woodall, Phuong A. Le, Heidi M. Leathers-Miller, Ronald M. Drake
A sagebrush conservation design to proactively restore America’s sagebrush biome
A working group of experts with diverse professional backgrounds and disciplinary expertise was assembled to conceptualize a spatially explicit conservation design to support and inform the Sagebrush Conservation Strategy Part 2. The goal was to leverage recent advancements in remotely sensed landcover products to develop spatially and temporally explicit maps of sagebrush rangeland condition and
Authors
Kevin Doherty, David M. Theobald, John B. Bradford, Lief A. Wiechman, Geoffrey Bedrosian, Chad S. Boyd, Matthew Cahill, Peter S. Coates, Megan K. Creutzburg, Michele R. Crist, Sean P. Finn, Alexander V. Kumar, Caitlin E. Littlefield, Jeremy D. Maestas, Karen L. Prentice, Brian G. Prochazka, Thomas E. Remington, William D. Sparklin, John C. Tull, Zachary Wurtzebach, Katherine A. Zeller
Perceptions of conservation introduction to inform decision support among U.S. Fish and Wildlife Service employees
Executive SummaryAround the globe, fish and wildlife managers are facing increasingly complex management issues because of multiscale ecological effects like climate change, species invasion, and land-use change. Managers seeking to prevent extinctions or preserve ecosystems are increasingly considering more interventionist techniques to overcome the resulting changes. Among those techniques, tran
Authors
Nicholas Cole, Julia B. Goolsby, Amanda E. Cravens
Loss of street tree canopy increases stormwater runoff
Urban forests have largely been overlooked for the role they play in reducing stormwater runoff volume by using hydrologic processes such as interception (rainfall intercepted by tree canopy), evapotranspiration (the transfer of water from vegetation into the atmosphere) and infiltration (percolation of rainwater into the Earth’s soil). Early research into the effects of trees on urban stormwater
Authors
William R. Selbig, Steven P. Loheide, William Shuster, Bryant C. Scharenbroch, Robert C. Coville, James Kruegler, William Avery, Ralph J. Haefner, David Nowak