Petrogenesis and rare earth element mineralization of the Elk Creek carbonatite, Nebraska, USA
Philip Verplanck, G. Lang Farmer, Richard M. Kettler, Heather A. Lowers, Craig A. Johnson, Alan E. Koenig, Michael J. Blessington
2022, Ore Geology Reviews (146)
Although carbonatites are the primary source of the world’s rare earth elements (REEs), the processes responsible for ore-grade REE enrichment in carbonatites are still poorly understood. In this study, we present a petrologic, geochemical, and isotopic evaluation of the Elk Creek carbonatite in southeast Nebraska...
Methods for computing 7Q2 and 7Q20 low-streamflow statistics to account for possible trends
Luther Schalk, Robert W. Dudley, Annalise G. Blum
2022, Open-File Report 2021-1111
Low-streamflow statistics, such as the annual minimum 7-day streamflow (which is the 7-day streamflow likely to be exceeded in 9 out of 10 years on average [7Q10]), that are computed by using the full historical streamflow record may not accurately represent current conditions at sites with statistically significant trends in...
Breeding dynamics of gopher frog metapopulations over 10 years
Brian A. Crawford, Anna L. Farmer, Kevin M Enge, Aubrey Heupel Greene, Lauren Diaz, John C. Maerz, Clinton T. Moore
2022, Journal of Fish and Wildlife Management (13) 422-436
Populations of amphibians that breed in isolated, ephemeral wetlands may be particularly sensitive to breeding and recruitment rates, which can be influenced by dynamic and difficult-to-predict extrinsic factors. The gopher frog Rana capito is a declining species currently proposed for listing under the U.S. Endangered Species Act, as well as one of...
Biogeography of freshwater mussels (Bivalvia: Unionida) in Texas and implications on conservation biology
Michael de Moulpied, Chase H. Smith, Clint R. Robertson, Nathan Johnson, Roel Lopez, Charles R. Randklev
2022, Diversity and Distributions (28) 1458-1474
AimBiogeography seeks to identify and explain the spatial distributions of species and has become an important tool used by conservationists to protect and manage aquatic organisms. Texas, located in the southwestern United States, is home to 52 species of freshwater mussels, 9 of which are endemic to Texas and 7...
Structured decision making to rank North American Wetland Conservation Act proposals within joint venture regions
Anastasia Krainyk, James E. Lyons, Gregory J. Soulliere, John M. Coluccy, Barry C. Wilson, Michael G. Brasher, Mohammed A Al-Saffar, Dale D. Humburg
2022, Journal of Fish and Wildlife Management (13) 375-395
The North American Wetlands Conservation Act (16 U.S.C. 4401-4412) provided funding and administration for wetland management and conservation projects. The North American Wetland Conservation Fund, enabled in 1989 with the Act, provides financial resources. Resource allocation decisions are based, in part, on regional experts, particularly migratory bird Joint Ventures (JVs)...
Can coastal habitats rise to the challenge? Resilience of estuarine habitats, carbon accumulation, and economic value to sea-level rise in a Puget Sound estuary
Monica Mei Jeen Moritsch, Kristin B. Byrd, Melanie J. Davis, Anthony J. Good, Judith Z. Drexler, James T. Morris, Isa Woo, Lisamarie Windham-Myers, Eric E. Grossman, Glynnis Nakai, Katrina L. Poppe, John M. Rybczyk
2022, Estuaries and Coasts (45) 2293-2309
Sea-level rise (SLR) and obstructions to sediment delivery pose challenges to the persistence of estuarine habitats and the ecosystem services they provide. Restoration actions and sediment management strategies may help mitigate such challenges by encouraging the vertical accretion of sediment in and horizontal migration of tidal forests and marshes. We...
Long-term groundwater availability in the Waihe‘e, ‘Īao, and Waikapū aquifer systems, Maui, Hawai‘i
Kolja Rotzoll, Delwyn S. Oki, Adam G. Johnson, William R. Souza
2022, Scientific Investigations Report 2021-5113
Groundwater levels have declined since the 1940s in the Wailuku area of central Maui, Hawai‘i, on the eastern flank of West Maui volcano, mainly in response to increased groundwater withdrawals. Available data since the 1980s also indicate a thinning of the freshwater lens and an increase in chloride concentrations of...
Quantifying the effects of tides, river flow, and barriers on movements of Chinook Salmon smolts at junctions in the Sacramento–San Joaquin River Delta using multistate models
Michael Dodrill, Russell Perry, Adam Pope, Xiaochun Wang
2022, Environmental Biology of Fishes (105) 2065-2082
Successful migration of Chinook Salmon (Oncorhynchus tshawytscha) smolts seaward in the Sacramento – San Joaquin River Delta (hereafter, Delta) requires navigating a network of numerous branching channels. Within the Delta, several key junctions route smolts either towards more direct paths to the ocean or towards the interior Delta, an area...
Dynamic sensitivity to resource availability influences population responses to mismatches in a shorebird
Luke R. Wilde, Josiah E. Simmons, Rose J. Swift, Nathan R. Senner
2022, Ecology (103)
Climate change has caused shifts in seasonally recurring biological events leading to the temporal decoupling of consumer-resource pairs – i.e., phenological mismatching. Although mismatches often affect individual fitness, they do not invariably scale up to affect populations, making it difficult to assess the risk they pose. Individual variation may contribute...
Georgia and Landsat
U.S. Geological Survey
2022, Fact Sheet 2022-3039
Georgia’s nickname is “The Peach State” for its fruitful production, but it also could be called “The State of Abundance.” Georgia ranks in the top 10 States for population, at more than 10 million residents, and 6 million residents are in the greater Atlanta area. Georgia also ranks in the...
A look ahead to the next decade at US volcano observatories
Hannah R. Dietterich, Christina A. Neal
2022, Bulletin of Volcanology (84)
Volcano monitoring, eruption response, and hazard assessment at volcanoes in the United States of America (US) fall under the mandate of five regional volcano observatories covering 161 active volcanoes. Working in a wide range of volcanic and geographic settings, US observatories must learn from and apply new knowledge and techniques...
Taking the leap: A binational translocation effort to close the 420-km gap in the Baja California lineage of the California red-legged frog (Rana draytonii)
Susan North, Jonathan Q. Richmond, Frank E. Santana, Anny Peralta-García, Elizabeth Gallegos, Adam R. Backlin, Cynthia Joan Hitchcock, Bradford Hollingsworth, Jorge H. Valdez-Villavicencio, Zachary Principe, Robert N. Fisher, Clark S. Winchell
2022, Frontiers in Conservation Science (3)
Conservation translocations, the human-mediated movement and release of a living organism for a conservation benefit, are increasingly recommended in species’ recovery plans as a technique for mitigating population declines or augmenting genetic diversity. However, translocation protocols for species with broad distributions may require regionally specific considerations to increase success, as...
Chew-cards can accurately index invasive rat densities in Mariana Island forests
Emma B. Hanslowe, Amy A. Yackel Adams, Melia Gail Nafus, Douglas A Page, Danielle R. Bradke, Francesca T. Erickson, Larissa L. Bailey
2022, NeoBiota (74) 29-56
Rats (Rattus spp.) are likely established on 80–90% of the world’s islands and represent one of the most damaging and expensive biological invaders. Effective rat control tools exist but require accurate population density estimates or indices to inform treatment timing and effort and to assess...
Application of recursive estimation to heat tracing for groundwater/surface-water exchange
W. Anderson McAliley, Frederick Day-Lewis, David M. Rey, Martin A. Briggs, Allen M. Shapiro, Dale Werkema
2022, Water Resources Research (58)
We present and demonstrate a recursive-estimation framework to infer groundwater/surface-water exchange based on temperature time series collected at different vertical depths below the sediment/water interface. We formulate the heat-transport problem as a state-space model (SSM), in which the spatial derivatives in the convection/conduction equation are approximated using...
Emoia atrocostata (tidepool skink, mangrove skink). USA Commonwealth of the Northern Mariana Islands: Saipan Island
Robert Reed, Jill Liske-Clark, Samantha Liske-Clark
2022, Herpetological Review (53) 262-263
No abstract available....
Spout Run temperature study revisited- Part II: New insights for trout habitat from TU & USGS collaboration 2022
Nathaniel P. Hitt
2022, Newsletter
The Winchester TU Chapter partnered with US Geological Survey scientists to forecast habitat conditions for brook trout in Virginia. The results can be viewed here: https://chesapeake.usgs.gov/fishforecast/ TU members deployed stream temperature gages within several streams across the region: Dry River, Passage Creek, Spout Run, Beaver Creek, Mossy Creek. The USGS...
New state and county records of introduced amphibians and reptiles of Georgia, USA.
Michael Brennan, Lance McBrayer, Joseph Carroll, Kenneth L. Krysko, Amy A. Yackel Adams
2022, Herpetological Review (53) 272-273
Recent efforts to eradicate the invasive Argentine Giant Tegu (Salvator merianae) has led to the discovery of several county records of this introduced lizard as well as several other potentially invasive amphibian and reptile species in the state of Georgia, USA. New records were determined using a database of county...
Water-budget accounting for tropical regions model (WATRMod) documentation
Delwyn S. Oki
2022, Open-File Report 2022-1013
Regional groundwater recharge commonly is estimated using a threshold-type water-budget approach in which groundwater recharge is assumed to occur when water in the plant-root zone exceeds the soil’s moisture storage capacity. A water budget of the plant-soil system accounts for water inputs (rainfall, fog interception, irrigation, septic-system leachate, and other...
Lake Ontario April prey fish survey results and Alewife assessment, 2022
Brian Weidel, Lee F G Gutowsky, Jessica Goretzke, Jeremy Holden, Scott P. Minihkeim
2022, Report
The annual Lake Ontario April bottom trawl survey and Alewife, Alosa pseudoharengus, population assessment provide science to inform management decisions related to predator-prey balance and fish community dynamics. The 2022 survey was conducted from March 31 to April 26, included 235 trawls in the main lake and embayments, and sampled...
2021 National park visitor spending effects: Economic contributions to local communities, states, and the nation
Catherine M. Cullinane Thomas, Matthew Flyr, Lynne Koontz
2022, Natural Resource Report NPS/NRSS/EQD/NRR-2022/2395
The National Park Service (NPS) manages the Nation’s most iconic destinations that attract millions of visitors from across the Nation and around the world. Trip-related spending by NPS visitors generates and supports economic activity within park gateway communities. This report summarizes the annual economic contribution analysis that measures how NPS...
The population genetics of the causative agent of snake fungal disease indicate recent introductions to the USA
Jason T. Ladner, Jonathan M. Palmer, Cassandra L. Ettinger, Jason E. Stajich, Terence M. Farrell, Brad M. Glorioso, Becki Lawson, Steven J. Price, Anne G. Stengle, Daniel A. Grear, Jeffrey M. Lorch
Andy P. Dobson, editor(s)
2022, PLoS Biology (20)
Snake fungal disease (SFD; ophidiomycosis), caused by the pathogen Ophidiomyces ophiodiicola (Oo), has been documented in wild snakes in North America and Eurasia, and is considered an emerging disease in the eastern United States of America. However, a lack of historical disease data has made it challenging to determine whether Oo is a recent...
North Carolina and Landsat
U.S. Geological Survey
2022, Fact Sheet 2022-3038
North Carolina’s rich history and importance in the colonial days played a critical role in the Nation’s economic development. It was also the setting for events like the Wright Brothers’ famous first flight of a powered aircraft, called “Wright Flyer,” which took place in Kitty Hawk in 1903. Today, North...
Late Paleozoic flexural extension and overprinting shortening in the southern Ozark dome, Arkansas, USA: Evolving fault kinematics in the foreland of the Ouachita orogen
Mark R. Hudson, Kenzie J. Turner
2022, Tectonics (41)
Faults and folds on the southern flank of the Ozark dome in northern Arkansas, USA, record flexural extension in a foreland area followed by shortening in response to the late Paleozoic Ouachita orogeny. Map-scale structures and an analysis of fault-slip data collected systematically during geologic mapping demonstrate that most deformation...
Distribution of niclosamide following granular Bayluscide applications in lotic systems
Cheryl Kaye, Jeffry A Bernardy, Justin Schueller, Nicholas Schloesser, Mary P. Henson, Chad K. Andresen, Courtney Kirkeeng
2022, Report
The granular formulation of Bayluscide [Bayluscide 3.2% Granular Sea Lamprey Larvicide, granular Bayluscide (gB)] is applied in lentic and lotic systems to survey (assessment) and kill (treatment) larval sea lampreys (Petromyzon marinus; Linnaeus, 1758) in the Great Lakes basin. Granules are spread on the water surface, settle to the sediment...
Using structured decision making to evaluate potential management responses to detection of dreissenid mussel (Dreissena spp.) environmental DNA
Adam Sepulveda, David R. Smith, Katherine M. O'Donnell, Nathan Owens, Brittany White, Cathy A. Richter, Christopher M. Merkes, Skylar Wolf, Mike Rau, Matthew Neilson, Wesley M. Daniel, Christine E. Dumoulin, Margaret Hunter
2022, Management of Biological Invasions (13) 344-368
Environmental (e)DNA tools are sensitive and cost-effective for early detection of invasive species. However, the uncertainty associated with the interpretation of positive eDNA detections makes it challenging to determine appropriate natural resource management responses. Multiple sources of error can give rise to positive detections of eDNA in a sample when...
