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Water depth fluctuations and water chemistry in five ephemeral rock pools (tinajas), Clark County, Nevada, 2021–23 Water depth fluctuations and water chemistry in five ephemeral rock pools (tinajas), Clark County, Nevada, 2021–23
Southern Nevada is characterized by an arid climate with limited perennial water resources. In this environment, rock pools (tinajas) are both a habitat and drinking water source for wildlife. In this reconnaissance-level project, the U.S. Geological Survey studied the water depth and water chemistry at five tinajas in Clark County, Nevada. The tinaja sites in this study are...
Authors
Joshua M. Gonzales, Katherine J. Earp
2023 Volcanic activity in Alaska and the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory 2023 Volcanic activity in Alaska and the Northern Mariana Islands—Summary of events and response of the Alaska Volcano Observatory
No abstract available.
Authors
Jordan Edward Lubbers, Abigail M. Nastan, Matthew W. Loewen, David Fee, Darren Tan, Ronni Grapenthin, Skye Kushner, Tara Shreve, Matthew M. Haney, Kristi L. Wallace, Christopher F. Waythomas, John A. Power, Yitian Cheng, Aaron Wech, Hannah R. Dietterich
A multi-state assessment of per- and polyfluoroalkyl substances (PFAS), pesticides, and antibiotic resistance genes in white-tailed deer (Odocoileus virginianus) of the United States A multi-state assessment of per- and polyfluoroalkyl substances (PFAS), pesticides, and antibiotic resistance genes in white-tailed deer (Odocoileus virginianus) of the United States
Sentinel species provide a vital One Health perspective on ecosystem contamination driven by rising global chemical production. We evaluated white-tailed deer (Odocoileus virginianus; n = 54, 24 states, six matrices) as nationwide bioindicators for PFAS, pesticides, antimicrobial resistance (AMR) genes, and microbiome diversity. PFAS were detected in 100% of deer samples (26 compounds...
Authors
Erin L. Pulster, Dana W. Kolpin, Carrie E. Givens, Michelle L. Hladik, Landon M. Keele, Shannon M. Meppelink, Marina D. Rodriguez, David A. Alvarez, Brianna M. Williams, Stephanie E. Gordon, Laura E. Hubbard
Springs of the Catskill Mountains: A conduit flow system in predominantly siliciclastic strata Springs of the Catskill Mountains: A conduit flow system in predominantly siliciclastic strata
The Catskill Mountains of New York state are composed of thick sequences of interbedded mudstone, sandstone, and siltstone that are intercalated with thin beds of paludal limestone and calcareous mudstone. Sandstones often contain rip-up clasts of calcareous material at their bases and contain minor amounts of carbonate cement throughout their mass. This minor amount of calcareous...
Authors
Daniel H. Doctor, Joshua R. Benton, Martin Briggs, William E. Odom, Neil C. Terry
Cultural pollen delivery is not needed to account for consistent, trace abundances of Zea mays pollen in the sediments of Santa Fe Lake Cultural pollen delivery is not needed to account for consistent, trace abundances of Zea mays pollen in the sediments of Santa Fe Lake
Roos (2026) proposes an intriguing cultural mechanism to account for the rare (
Authors
Paul D. Henne, Susann Stolze, Natalie M. Kehrwald, Rebecca Lynn Brice, Craig D. Allen
Floods of June 20–July 6, 2024, in the Big Sioux River, Rock River, Little Sioux River, Ocheyedan River, and Floyd River Basins, northwestern Iowa Floods of June 20–July 6, 2024, in the Big Sioux River, Rock River, Little Sioux River, Ocheyedan River, and Floyd River Basins, northwestern Iowa
Major flooding occurred on June 20–July 6, 2024, in northwestern Iowa affecting the Big Sioux, Rock, Little Sioux, Ocheyedan, and Floyd River Basins. Heavy rain fell in northwestern Iowa, southwestern Minnesota, and southeastern South Dakota on June 20–22, 2024. Parts of northwestern Iowa recorded 2–6 inches of rainfall and localized amounts exceeding 12 inches. A maximum peak-of-record...
Authors
Padraic S. O’Shea, Andrew M. Williams, Mackenzie K. Marti
Decision-centered systems for the future of wildlife conservation Decision-centered systems for the future of wildlife conservation
The future of wildlife conservation will be determined by how well we decide, not simply by how much we know. Advances in quantitative ecology, sensor networks, and artificial intelligence have enhanced the field's ability to estimate population states and predict ecological dynamics. Yet, these technological and analytical advancements have not translated into proportional improvements...
Authors
Angela K. Fuller
Assessment of undiscovered shale-gas resources in the Utica Shale of eastern Canada, 2026 Assessment of undiscovered shale-gas resources in the Utica Shale of eastern Canada, 2026
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 9 trillion cubic feet of shale gas in the Utica Shale of eastern Canada.
Authors
Christopher J. Schenk, Tracey J. Mercier, Phuong A. Le, Andrea D. Cicero, Sarah E. Gelman, Jane S. Hearon, Benjamin G. Johnson, Jenny H. Lagesse, Heidi M. Leathers-Miller
How tough a passage? Nonnative fish entrainment survivability at a major dam in the western USA How tough a passage? Nonnative fish entrainment survivability at a major dam in the western USA
The Colorado River downstream of Glen Canyon Dam (GCD) in the southwest USA demonstrates anthropogenic modification including altered flow and temperature regimes and established nonnative species in upstream reservoirs. Water overallocation and megadrought are contributing to new potential invasion pathways for nonnative fishes through dam releases. In this study, we quantified factors...
Authors
Barrett Friesen, Casey A. Pennock, Phaedra E. Budy
Production of secondary microbial methane from a gas hydrate-bearing reservoir at the HYDRATE P1 Production Test Well (PTW-1) on the Alaskan North Slope Production of secondary microbial methane from a gas hydrate-bearing reservoir at the HYDRATE P1 Production Test Well (PTW-1) on the Alaskan North Slope
Gas hydrate in the Alaskan North Slope (ANS) is believed to contain as much methane as the known conventional gas accumulations in the Prudhoe Bay field. The JOGMEC-DOE-USGS Collaborative Gas Hydrate R&D Project conducted an extended-duration production test from the sub-permafrost, gas-hydrate saturated B1 sand reservoir (unit B) at the Kuparuk State 7-11-12 Site in the Prudhoe Bay Unit...
Authors
John W. Pohlman, Michael Casso, Lee-Gray Boze, William F. Waite, Stephen C. Phillips, Carolyn Ruppel, Melanie Holland, Jun Yoneda, Motoi Oshima, Akihiro Hiruta, Timothy S. Collett
Tapwater contaminant mixtures and cumulative risk screening on the Crow (Apsáalooke) Reservation Tapwater contaminant mixtures and cumulative risk screening on the Crow (Apsáalooke) Reservation
Introduction: Water insecurity is a challenge for the Apsáalooke (Crow) Tribal Nation in south-central Montana, United States. Both private-well and public-supply tapwater (TW) are vulnerable to a range of contaminants, posing potential risks to community health and well-being. Ongoing community concerns about unrecognized inorganic, organic, and microbial contaminants underscore the...
Authors
Paul M. Bradley, Kelly L. Smalling, John C. Doyle, Margaret J. Eggers, Kristin M. Romanok, Elliott P. Barnhart, Picabo Binette, Eric M. Castro, Madisan Chavez, Stephanie A. Ewing, Stephanie E. Gordon, James L. Gray, Ashley M. Groshong, Leslie K. Kanagy, Joree Wclay LaFrance, Keith A. Loftin, Carrie Mae Long, Christine Martin, R. Blaine McCleskey, Shannon M. Meppelink, Crystal L. Richards, Molly L. Schreiner, Jonathan I. Shikany, Mahelat Tesfamariam, Sheree Jo Watson
A framework for investigating fish population density responses to habitat fragmentation A framework for investigating fish population density responses to habitat fragmentation
Globally, fish populations that rely on rivers are being fragmented by in-stream barriers, but it is unclear how pervasive any negative population responses to fragmentation are. We developed a modeling framework for estimating density responses of fishes upstream and downstream of in-stream barriers and applied it to learn how low-head dams have influenced fish assemblages in 24 Great...
Authors
Sean Alois Lewandoski, Gale Bravener, Nathan Coombs, Robert McLaughlin