Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

68835 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 294, results 7326 - 7350

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Control of invasive sea lampreys using the piscicides TFM and niclosamide: Toxicology, successes & future prospects
Michael Wilkie, Terrance Hubert, Michael A. Boogaard, Oana Birceanu
2019, Aquatic Toxicology (211) 235-252
The invasion of the Laurentian Great Lakes of North America by sea lampreys (Petromyzon marinus) in the early 20th century contributed to the depletion of commercial, recreational and culturally important fish populations, devastating the economies of communities that relied on the fishery. Sea lamprey populations were subsequently controlled using an...
Temperature mediates secondary dormancy in resting cysts of Pyrodinium bahamense (Dinophyceae)
Cary B. Lopez, Aliza Karim, Susan Murasko, Marci E. Marot, Christopher G. Smith, Alina A. Corcoran
2019, Journal of Phycology (55) 924-955
High‐biomass blooms of the toxic dinoflagellate Pyrodinium bahamense occur most summers in Tampa Bay, Florida, USA, posing a recurring threat to ecosystem health. Like many dinoflagellates, P. bahamense forms immobile resting cysts that can be deposited on the seafloor—creating a seed bank that can retain the organism within the ecosystem...
Hydrologic modifications challenge bottomland hardwood forest management
Sammy L. King, R.F. Keim
2019, Journal of Forestry (117) 504-514
Bottomland hardwoods are floodplain forests along rivers and streams throughout the southeastern United States. The interrelations among hydrology, soils, geomorphic landforms, and tree species composition are the foundation of forest management in bottomland hardwoods, and historically their correspondence has allowed for somewhat predictable forest responses based upon the hydrogeomorphic...
An integrated framework for ecological drought across riverscapes of North America
Ryan Kovach, Jason B. Dunham, Robert Al-Chokhachy, Craig Snyder, Erik A. Beever, Gregory T. Pederson, Abigail Lynch, Nathaniel P. Hitt, Christopher P. Konrad, Kristin L. Jaeger, Alan H. Rea, Adam J. Sepulveda, Patrick M. Lambert, Jason M. Stoker, J. Joseph Giersch, Clint C. Muhlfeld
2019, BioScience (69) 418-431
Climate change is increasing the severity and extent of extreme droughts events, posing a critical threat to freshwater ecosystems, particularly with increasing human demands for diminishing water supplies. Despite the importance of drought as a significant driver of ecological and evolutionary dynamics, current understanding of drought consequences for freshwater...
Basin, climatic, and irrigation factors associated with median summer water yields for streams in Southwestern Michigan, 1945-2015
David J. Holtschlag
2019, Scientific Investigations Report 2018-5071
Median summer water yields and resultant flows for streams are used in Michigan to regulate large water withdrawals to help prevent negative effects on characteristic fish populations. Large water withdrawals commonly are associated with irrigation in rural areas. In an earlier statewide report, an index-flow statistic for the period of...
Resilience of benthic macroinvertebrates to extreme floods in a Catskill Mountain river, New York, USA: Implications for water quality monitoring and assessment
Alexander J. Smith, Barry P. Baldigo, Brian T Duffy, Scott D. George, Brian Dresser
2019, Ecological Indicators (104) 107-115
Changes in the timing, magnitude, frequency, and duration of extreme hydrologic events are becoming apparent and could disrupt species assemblages and stream ecosystems across the Northeastern United States. Between August 28 and 29 of 2011, an average of 31 cm of rain from Tropical Storm Irene fell across Eastern New...
Integrated modeling reveals shifts in waterfowl population dynamics under climate change
Qing Zhao, Scott Boomer, J. Andrew Royle
2019, Ecography (42) 1470-1481
1. Climate change has been identified as one of the most important drivers of wildlife populations. The development of appropriate conservation strategies relies on reliable predictions of population responses to climate change, which require in-depth understanding of the complex relationships between climate and population dynamics through density dependent demographic processes....
Remote sensing of river flow in Alaska—New technology to improve safety and expand coverage of USGS streamgaging
Jeff Conaway, John R. Eggleston, Carl J. Legleiter, John W. Jones, Paul J. Kinzel, John W. Fulton
2019, Fact Sheet 2019-3024
The U.S. Geological Survey monitors water level (water surface elevation relative to an arbitrary datum) and measures streamflow in Alaska rivers to compute and compile river flow records for use by water resource planners, engineers, and land managers to design infrastructure, manage floodplains, and protect life, property, and aquatic resources....
Clustering and ensembling approaches to support surrogate-based species management
Helen Sofaer, Curtis H. Flather, Susan K. Skagen, Valerie Steen, Barry R. Noon
2019, Diversity and Distributions (25) 1246-1258
AimSurrogate species can provide an efficient mechanism for biodiversity conservation if they encompass the needs or indicate the status of a broader set of species. When species that are the focus of ongoing management efforts act as effective surrogates for other species, these incidental surrogacy benefits...
The use of national datasets to produce an average annual water budget for the Mississippi Alluvial Plain, 2000–13
Meredith Reitz, Wade Kress
2019, Fact Sheet 2019-3001
OverviewWater is a critically important resource for the Mississippi Alluvial Plain (MAP) region, supporting a multibillion-dollar agricultural industry. There are concerns that continued withdrawals of groundwater for irrigation may decrease future water supplies. The U.S. Geological Survey has a history of conducting research in the MAP region and recently began...
Assessing water-quality changes in U.S. rivers at multiple geographic scales using results from probabilistic and targeted monitoring
Lori A. Sprague, Richard M. Mitchell, Amina I. Pollard, James A. Falcone
2019, Environmental Monitoring and Assessment (191)
Two commonly used approaches for water quality monitoring are probabilistic and targeted. In a probabilistic approach like the US Environmental Protection Agency’s National Rivers and Streams Assessment, monitoring sites are selected using a statistically representative approach. In a targeted approach like that used by many monitoring organizations, monitoring...
Preliminary stage and streamflow data at selected U.S. Geological Survey streamgages in New England for the floods of April 2019
Richard G. Kiah, Brianna A. Smith, Nicholas W. Stasulis
2019, Open-File Report 2019-1052
The combination of rainfall and snowmelt in northern New England and rainfall in southern New England resulted in minor to major flooding from April 15 to 24, 2019, according to stage and streamflow data collected at 63 selected U.S. Geological Survey (USGS) streamgages. A typical USGS streamgage measures and records...
Soil physical, hydraulic, and thermal properties in interior Alaska, USA: Implications for hydrologic response to thawing permafrost conditions
Brian A. Ebel, Joshua C. Koch, Michelle A. Walvoord
2019, Water Resources Research (55) 4427-4447
Boreal forest regions are a focal point for investigations of coupled water and biogeochemical fluxes in response to wildfire disturbances, climate warming, and permafrost thaw. Soil hydraulic, physical, and thermal property measurements for mineral soils in permafrost regions are limited, despite substantial influences on cryohydrogeologic model results. This work expands...
Groundwater quality in the Sacramento Metropolitan shallow aquifer, California
George L. Bennett V
2019, Open-File Report 2019-1047
The Sacramento metropolitan (SacMetro) study unit covers approximately 3,250 square kilometers of the Central Valley along the eastern edge of the northern and southern ends of the San Joaquin and Sacramento Valleys, respectively. Groundwater withdrawals supply a significant portion of the water-resource needs of the region. In the southern portion...
Spatial and temporal variability of fish assemblages in acidified streams: Implications for long-term monitoring
Scott D. George, Barry P. Baldigo, Gregory B. Lawrence
2019, Report
Numerous studies have established strong linkages between acid deposition, soil and surface-water acidification, and toxicity to aquatic biota. Little is known however, about the effects of acidification on fish assemblages in headwater streams because they are highly variable, and pre-acidification data are often lacking. The primary purpose of this study...
Effectiveness of fish screens in protecting lamprey (Entosphenus and Lampetra spp.) ammocoetes—Pilot testing of variable screen angle
Theresa L. Liedtke, Daniel J. Didricksen, Lisa K. Weiland, Joshua A. Ragala, Ralph Lampman
2019, Open-File Report 2019-1044
Thousands of screened water diversions throughout the Columbia River Basin of the Pacific Northwest are sources of entrainment (unintended diversion into an unsafe passage route), injury, and mortality for a range of fish species and screening criteria have been developed to reduce and mitigate these effects. Large knowledge gaps...
Movements of immature bald eagles: Implications for bird aircraft strike hazard
Tricia A. Miller, Jeff L Cooper, Adam E. Duerr, Melissa A. Braham, James T. Anderson, Todd E. Katzner
2019, Journal of Wildlife Management (83) 879-892
Bald eagle (Haliaeetus leucocephalus) aircraft strikes have increased dramatically over the last 20 years as their populations have recovered to near historic sizes. Their attraction to airfields and their large body size makes them a danger to aircraft and therefore important to airfield wildlife managers. However, their management is complicated...
Temporal variability in stream fish assemblage metrics and implications for long-term monitoring
Scott D. George, Barry P. Baldigo, Daniel S. Stich
2019, Ecological Indicators (101) 661-669
High natural variability in the condition of fish communities in headwater streams complicates detection of long-term responses to changes in water quality. As a result, little is known about the impacts and recovery of fishes from acid deposition in streams of New York. Twenty-one fish metrics from annual electrofishing surveys...
Shrub persistence and increased grass mortality in response to drought in dryland systems
Daniel E. Winkler, Jayne Belnap, David L. Hoover, Sasha C. Reed, Michael C. Duniway
2019, Global Change Biology (25) 3121-3135
Droughts in the southwest United States have led to major forest and grassland die‐off events in recent decades, suggesting plant community and ecosystem shifts are imminent as native perennial grass populations are replaced by shrub‐ and invasive plant‐dominated systems. These patterns are similar to those observed in arid and semiarid...
Kinetic study on clogging of a geothermal pumping well triggered by mixing-induced biogeochemical reactions
Luc Burte, Charles A. Cravotta III, Lorine Bethencourt, Julien Farasin, Mathieu Pedrot, Alexis Dufresne, Marie-Francoise Gerard, Catherine Baranger, Tanguy Le Borgne, Luc Aquilina
2019, Environmental Science & Technology (53) 5848-5857
The sustainability of ground-source geothermal systems can be severely impacted by microbially mediated clogging processes. Biofouling of water wells by hydrous ferric oxide is a widespread problem. Although the mechanisms and critical environmental factors associated with clogging development are widely recognized, effects of mixing processes within the wells and time...
Estimated 2016 groundwater level and drawdown from predevelopment to 2016 in the Santa Fe Group Aquifer System in the Albuquerque Area, Central New Mexico
Amy E. Galanter, Lucas T.S. Curry
2019, Scientific Investigations Map 3433
The U.S. Geological Survey, in cooperation with the Albuquerque Bernalillo County Water Utility Authority (ABCWUA), has developed a series of maps and associated reports to document changes in the groundwater level in the production zone of the Santa Fe Group aquifer system in the Albuquerque, New Mexico, area. The current...
Cryptic introduction of water chestnut (Trapa) in the northeastern United States
Greg Chorak, Lynde Dodd, Nancy B. Rybicki, Kadiera Ingram, Murat Buyukyoruk, Yasuro Kadono, Yuan Yuan Chen, Ryan Thum
2019, Aquatic Botany (155) 32-37
Trapa natans, characterized by four-horned fruits, has been recognized as an introduced species in the northeastern United States since the 1920′s. However, in 2014 a two-horned morphotype of Trapa was discovered in the Potomac River in Virginia. As such, we hypothesize the two-horned variety represents a cryptic introduction of a Trapa taxon distinct from...