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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.

Filter Total Items: 84803

Mobile Bay Mobile Bay

Mobile Bay is the largest bay found in Alabama’s coastal area (Handley et al., 2007). It was named an Estuary of National Significance in 1995 under the U.S. Environmental Protection Agency’s (EPA) National Estuary Program (NEP), and its Comprehensive Conservation Management Plan was completed in 2002. Mobile Bay is 1,070 km2 (413 miles2) in area and 51 km (32 miles) long, making it the...
Authors
Lawrence R. Handley, Kathryn A. Spear, Stephen Jones, Cindy A. Thatcher

Mountain pine beetle impacts on vegetation and carbon stocks Mountain pine beetle impacts on vegetation and carbon stocks

In the Southern Rocky Mountains, an epidemic outbreak of mountain pine beetle (Dendroctonus ponderosae; MPB) has caused levels of tree mortality unprecedented in recorded history. The impacts of this mortality on vegetation composition, forest structure, and carbon stocks have only recently received attention, although the impacts of other disturbances such as fires and land-use/land...
Authors
Todd Hawbaker, Jennifer S. Briggs, Megan K. Caldwell, Susan Stitt

National Park Service Vegetation Inventory Program, Cuyahoga Valley National Park, Ohio National Park Service Vegetation Inventory Program, Cuyahoga Valley National Park, Ohio

The National Park Service (NPS) Vegetation Inventory Program (VIP) is an effort to classify, describe, and map existing vegetation of national park units for the NPS Natural Resource Inventory and Monitoring (I&M) Program. The NPS VIP is managed by the NPS Biological Resources Management Division and provides baseline vegetation information to the NPS Natural Resource I&M Program. The U...
Authors
Kevin D. Hop, J. Drake, Andrew C. Strassman, Erin E. Hoy, Shannon Menard, J.J. Dieck, J.W. Jakusz

Native Prairie Adaptive Management: a multi region adaptive approach to invasive plant management on Fish and Wildlife Service owned native prairies Native Prairie Adaptive Management: a multi region adaptive approach to invasive plant management on Fish and Wildlife Service owned native prairies

Much of the native prairie managed by the U.S. Fish and Wildlife Service (FWS) in the Prairie Pothole Region (PPR) of the northern Great Plains is extensively invaded by the introduced cool-season grasses, smooth brome (Bromus inermis) and Kentucky bluegrass (Poa pratensis). Management to suppress these invasive plants has had poor to inconsistent success. The central challenge to...
Authors
Jill J. Gannon, Terry L. Shaffer, Clinton T. Moore

Northern Great Plains Network water quality monitoring design for tributaries to the Missouri National Recreational River Northern Great Plains Network water quality monitoring design for tributaries to the Missouri National Recreational River

The National Park Service (NPS) organized more than 270 parks with important natural resources into 32 ecoregional networks to conduct Inventory and Monitoring (I&M) activities for assessment of natural resources within park units. The Missouri National Recreational River (NRR) is among the 13 parks in the NPS Northern Great Plain Network (NGPN). Park managers and NGPN staff identified...
Authors
Barbara L. Rowe, Stephen K. Wilson, Lisa Yager, Marcia H. Wilson

Ocean climate indicators: A monitoring inventory and plan for tracking climate change in the north-central California coast and ocean region Ocean climate indicators: A monitoring inventory and plan for tracking climate change in the north-central California coast and ocean region

The impacts of climate change, defined as increasing atmospheric and oceanic carbon dioxide and associated increases in average global temperature and oceanic acidity, have been observed both globally and on regional scales, such as in the North-central California coast and ocean, a region that extends from Point Arena to Point Año Nuevo and includes the Pacific coastline of the San...
Authors
Benet Duncan, Kelley Higgason, Tom Suchanek, John Largier, Jay Stachowicz, Sarah Allen, Steven Bograd, R. Breen, Holly Gellerman, Tessa Hill, Jaime Jahncke, Rebecca L. Johnson, Steve I. Lonhart, Steven Morgan, Frances Wilkerson, Jan Roletto

Persistent organic pollutants in wetlands of the Mekong Basin Persistent organic pollutants in wetlands of the Mekong Basin

In this study, the presence and concentration of persistent organic pollutants (POP) were assessed in surface sediments collected from a wide variety of wetlands located throughout the Mekong Basin in Myanmar, Lao People’s Democratic Republic (PDR), Thailand, Cambodia, and Vietnam. Of the 39 POPs tested in 531 sediment samples, dichlorodiphenyltrichloroethane (DDT) and its metabolites...
Authors
Tran Triet, Jeb Anthony Barzen, Sansanee Choowaew, Jon Michael Engels, Duong Van Ni, Nguyen Anh Mai, Khamla Inkhavilay, Kim Soben, Rath Sethik, Bhuvadol Gomotean, Le Xuan Thuyen, Aung Kyi, Nguyen Huy Du, Richard Nordheim, Ho Tung Lam, Dorn M. Moore, Scott Wilson

Preliminary isostatic gravity map of the Grouse Creek and east part of the Jackpot 30 by 60 quadrangles, Box Elder County, Utah, and Cassia County, Idaho Preliminary isostatic gravity map of the Grouse Creek and east part of the Jackpot 30 by 60 quadrangles, Box Elder County, Utah, and Cassia County, Idaho

A new isostatic residual gravity map of the northwest corner of Utah is based on compilation of preexisting data and new data collected by the Utah and United States Geological Surveys. Pronounced gravity lows occur over Junction, Grouse Creek, and upper Raft River Valleys, indicating significant thickness of low-density Tertiary sedimentary rocks and deposits. Gravity highs coincide...
Authors
Victoria E. Langenheim, H. Willis, N. D. Athens, Bruce A. Chuchel, J. Roza, H.I. Hiscock, C.L. Hardwick, S.M. Kraushaar, N.E. Knepprath, Jose J. Rosario

Preliminary isostatic residual gravity map of the Newfoundland Mountains 30' by 60' quadrangle and east part of the Wells 30' by 60' quadrangle, Box Elder County, Utah Preliminary isostatic residual gravity map of the Newfoundland Mountains 30' by 60' quadrangle and east part of the Wells 30' by 60' quadrangle, Box Elder County, Utah

A new isostatic residual gravity map of the Newfoundland Mountains and east of the Wells 30×60 quadrangles of Utah is based on compilation of preexisting data and new data collected by the Utah and U.S. Geological Surveys. Pronounced gravity lows occur over Grouse Creek Valley and locally beneath the Great Salt Lake Desert, indicating significant thickness of low-density Tertiary...
Authors
Victoria E. Langenheim, N. D. Athens, B. A. Churchel, H. Willis, N.E. Knepprath, Jose J. Rosario, J. Roza, S.M. Kraushaar, C.L. Hardwick

Priority data on marine and estuarine resources within northeastern National Parks: Inventory and acquisition needs Priority data on marine and estuarine resources within northeastern National Parks: Inventory and acquisition needs

The purpose of this project was to guide development of a strategy for the inventory and mapping of submerged natural resources associated within 10 coastal parks of the National Park Service (NPS) Northeast Region (NER; see Table 1). Priority data needs were identified by the NER Ocean Stewardship Task Force. The majority of the NER priority data needs involve the biotic, chemical, and
Authors
Tracy E. Hart, Hilary A. Neckles, Blaine S. Kopp

Real-time piscicide tracking using Rhodamine WT dye for support of application, transport, and deactivation strategies in riverine environments Real-time piscicide tracking using Rhodamine WT dye for support of application, transport, and deactivation strategies in riverine environments

Piscicide applications in riverine environments are complicated by the advection and dispersion of the piscicide by the flowing water. Proper deactivation of the fish toxin is required outside of the treatment reach to ensure that there is minimal collateral damage to fisheries downstream or in connecting and adjacent water bodies. In urban settings and highly managed waterways, further
Authors
Patrick Ryan Jackson, Jonathan D. Lageman

Reforestation to enhance Appalachian mined lands as habitat for terrestrial wildlife Reforestation to enhance Appalachian mined lands as habitat for terrestrial wildlife

Surface mining is widespread throughout the Appalachian coalfield, a region with extensive forests that are rich in wildlife. Game species for hunting, non-game wildlife species, and other organisms are important contributors to sustainable and productive ecosystems. Although small breaks in the forest canopy are important to wildlife diversity, most native Appalachian wildlife species...
Authors
Petra B. Wood, Jeff Larkin, Jeremy Mizel, Carl E. Zipper, Patrick Angel
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