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Reports

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.

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Distribution and demography of coastal Cactus Wrens (Campylorhynchus brunneicapillus) in San Diego County, California—2022 data summary Distribution and demography of coastal Cactus Wrens (Campylorhynchus brunneicapillus) in San Diego County, California—2022 data summary

We surveyed for coastal Cactus Wren (Campylorhynchus brunneicapillus) in 507 established plots in San Diego County in 2022, encompassing 4 genetic clusters (Otay, Lake Jennings, Sweetwater/Encanto, and San Pasqual). Two surveys were completed at each plot between March 1 and July 31. Cactus Wrens were detected in 214 plots (42 percent of plots). Cactus Wrens were detected in 31 percent...
Authors
Suellen Lynn, Barbara E. Kus

Evaluation of management efforts to reduce nutrient and sediment contributions to the Chesapeake Bay estuary Evaluation of management efforts to reduce nutrient and sediment contributions to the Chesapeake Bay estuary

No abstract available.
Authors
Z. Easton, K. Stephenson, B. Benham, J.K. Bohlke, A. Buda, A. Collick, L. Fowler, E. Gilinsky, C. Hershner, Andrew Miller, Gregory E. Noe, L. Palm-Forster, T. Thompson

Achieving water quality goals in the Chesapeake Bay: A comprehensive evaluation of system response Achieving water quality goals in the Chesapeake Bay: A comprehensive evaluation of system response

A Comprehensive Evaluation of System Response Achieving Water Quality Goals in the Chesapeake Bay: A Comprehensive Evaluation of System Response (CESR) includes an evaluation of why progress toward meeting the TMDL and water quality standards has been slower than expected and offers options for how progress can be accelerated. This report is a summation of a three year investigation into...

Assessment of lunar resource exploration in 2022 Assessment of lunar resource exploration in 2022

The idea of mining the Moon, once purely science-fiction, is now on the verge of becoming reality. Taking advantage of the resources on the Moon is part of the plans of many nations and some enterprising commercial entities; demonstrating in-situ (in place) resource utilization near the lunar south pole is an explicit goal of the United States’ Artemis program. Economic extraction and...
Authors
Laszlo P. Keszthelyi, Joshua A. Coyan, Kristen A. Bennett, Lillian R. Ostrach, Lisa R. Gaddis, Travis S.J. Gabriel, Justin Hagerty

Development of an integrated hydrologic flow model of the Rio San Jose Basin and surrounding areas, New Mexico Development of an integrated hydrologic flow model of the Rio San Jose Basin and surrounding areas, New Mexico

The Rio San Jose Integrated Hydrologic Model (RSJIHM) was developed to provide a tool for analyzing the hydrologic system response to historical water use and potential changes in water supplies and demands in the Rio San Jose Basin. The study area encompasses about 6,300 square miles in west-central New Mexico and includes the communities of Grants, Bluewater, and San Rafael and three...
Authors
Andre B. Ritchie, Shaleene B. Chavarria, Amy E. Galanter, Allison K. Flickinger, Andrew J. Robertson, Donald S. Sweetkind

Bottom trawl assessment of Lake Ontario's benthic preyfish community, 2022 Bottom trawl assessment of Lake Ontario's benthic preyfish community, 2022

Since 1978, surveys of Lake Ontario preyfish communities have provided information on the status and trends of the benthic preyfish community related to Fish Community Objectives that includes understanding preyfish population dynamics and community diversity. Beginning in 2015, the benthic preyfish survey expanded from US-only to incorporate Canadian sites, increasing the survey’s...
Authors
Brian O’Malley, Scott P. Minihkeim, James McKenna, Jessica A. Goretzke, Jeremy P. Holden
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