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Browse more than 65,000 articles 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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Considerations for using autonomous recording units to monitor northern bobwhite occupancy at large spatial scales Considerations for using autonomous recording units to monitor northern bobwhite occupancy at large spatial scales

Northern bobwhites (Colinus virginianus) have experienced widespread declines across their range, increasing the need for population monitoring across broad spatial and temporal scales. Yet large-scale monitoring of post-breeding bobwhites remains limited by the time-intensive nature of fall (i.e., autumn) covey counts. Passive acoustic monitoring with autonomous recording units (ARUs)...
Authors
Riggs O. Wilson, Todd R. Bogenschutz, Anna Maureen Tucker, Adam K. Janke

Niobium-bearing minerals from the Sheep Creek carbonatite-related deposits of southwest Montana, USA Niobium-bearing minerals from the Sheep Creek carbonatite-related deposits of southwest Montana, USA

The Sheep Creek area in southwest Montana contains a number of small, tabular, carbonatite-related deposits that are rich in Nb and REE minerals. Nb-rich minerals from Sheep Creek and nearby Woods Creek are herein described in detail. The carbonatite veins contain a mix of calcite and Fe-bearing dolomite, with locally abundant apatite, baryte, celsian, actinolite, phlogopite, monazite-...
Authors
Christopher H. Gammons, Heather A. Lowers, Jay M. Thompson, Gary F. Wyss

Elemental and isotope geochemistry of Smackover Formation brines in Alabama and Arkansas: Implications for fluid mixing and water-rock interaction Elemental and isotope geochemistry of Smackover Formation brines in Alabama and Arkansas: Implications for fluid mixing and water-rock interaction

This study investigates the geochemical characteristics of brines within the Upper Jurassic Smackover Formation in Alabama and Arkansas through elemental and isotopic analyses and geochemical modeling to reveal the extent and nature of fluid mixing and water-rock interactions. Smackover Formation brines exhibit Na-Cl-Ca hydrogeochemical facies and sulfate depletion relative to seawater...
Authors
Kelly Kreitzer, Ming-Kuo Lee, Haibo Zou, Yang Wang, Andrew L. Masterson, Ann S. Ojeda, Billor Zeki, Natalia Malina, Gregory Guthrie, Bonnie McDevitt, Ann Arnold, Demi Durham

A practical model and online tool to predict cover crop nitrogen content and carbon-to-nitrogen ratio via remote sensing A practical model and online tool to predict cover crop nitrogen content and carbon-to-nitrogen ratio via remote sensing

Purpose: Estimations of cover crop (CC), nitrogen (N) content and carbon-to-nitrogen (C:N) ratio are crucial for guiding N fertilizer recommendations for subsequent cash crops, yet prediction tools that can be easily adopted by practitioners are lacking. This study aims to (1) develop models to predict CC N content and C:N ratio using Normalized Difference Vegetation Index (NDVI) and...
Authors
Navdeep Kaur, Charlie White, Andrew Lefever, Alison Thieme, Jyoti Jennewein, W. Dean Hively, Daniella Carrijo

Predictability creates vulnerability: Long-term acoustic telemetry reveals hidden threat windows for endangered Atlantic sturgeon Predictability creates vulnerability: Long-term acoustic telemetry reveals hidden threat windows for endangered Atlantic sturgeon

1.Individual movement strategies govern access to important habitats but can expose certain animals to spatially and temporally variable threats, producing consistent, phenotype-specific differences in risk. For endangered Atlantic sturgeon (Acipenser oxyrinchus), migration timing shapes exposure risk to vessel strikes, dredging activity, and shifting estuarine conditions, yet management...
Authors
Shannon L. White, Amanda L. Higgs, Dewayne A. Fox, Matthew W. Breece, Harold M. Brundage

Does wind disrupt overwintering monarch butterfly clusters? An observational study of western monarchs Does wind disrupt overwintering monarch butterfly clusters? An observational study of western monarchs

Wind protection is a central focus of western monarch butterfly (Danaus plexippus) overwintering habitat conservation. The Wind Disruption Hypothesis guiding management decisions predicts that winds at or above 2 m/s disrupt clusters and that cluster abundance decreases as wind speed increases. At two California groves during the 2023–2024 overwintering season, we paired time-lapse...
Authors
Kyle Nessen, Peter Christian Ibsen, Jay E. Diffendorfer, Frances X. Villablanca

The FunAqua dataset of global fungal biodiversity in aquatic ecosystems The FunAqua dataset of global fungal biodiversity in aquatic ecosystems

Advances in high-throughput DNA sequencing technologies have accelerated research on aquatic microorganisms, their diversity, and ecological functions. This has also significantly advanced research on fungi that shape aquatic ecosystems and food webs. Here, we present the FunAqua dataset, which describes global fungal biodiversity in aquatic ecosystems based on eukaryotic long-read...
Authors
V. Prins, L. Tedersoo, V. Mikryukov, P. Paiste, M. Sepp, H. Grossart, V. Kisand, A. Laas, H. Tammert, Kessy Abarenkov, A. Agan, H. Agasild, R. Agha, J. M. Alatalo, J. Alvarez-Manjarrez, A. Ameryk, J. Anderson, S. Anslan, A. Antão-Geraldes, A. Antosiak, J. Arce Funck, R. Arias-Real, M. Ariyan, M. Bahram, Sheel Bansal, R. Bao, S. Beck, P. Bernotas, Nicole Lynn Berry, S. Bertilsson, C. Birnbaum, M. Bonk, A. V. Borges, F. Botez, F. Q. Brearley, J. Brookes, D. Bruno, A. Budzyńska, G. Bullerjahn, M. Bundschuh, B. Calheiros-Nogueira, R. Calore, C. Capelli, L. Caputo, R. Carballeira, I. Chronis, F. Čiampor, Z. Čiamporová-Zaťovičová, D. Craig, Z. Csabai, N. Cukrov, L. da Silva, E. de Eyto, J. Delgado, I. Dimante-Deimantovica, I. Domaizon, R. Dondajewska-Pielka, T. Dornan, R. Drenkhan, K. Drouillard, S. Duarte, O. Dulya, A. Dzhulai, D. Dziga, B. Egeter, M. Espenberg, S. Färkkilä, S. Fazi, A. Feckler, E. Fenoy, I. Fernandes, S. Ferreira, V. Ferreira, T. Fleituch, R. Fornaroli, A. Freiwald, T. Frenken, P. Gaffney, O. García-Oliva, H. Geara, S. Gkelis, D. Gohar, R. Gołdyn, F. Grandjean, A. Gsell, C. Gutiérrez-Cánovas, P. Haase, N. Hagh-Doust, T. Harris, A. Hashem, S. Havens, B. Heidari, S. Higgins, M. Hosseyni Moghaddam, A. Ibrahim, D. Jerinkić, S. Jones, M. Kagami, S. Kahar, K. Kangro, K. Kariman, M. Kataržytė, S. Kepfer-Rojas, H. Khan, L. B. Knoll, A. Knorrn, U. Kõljalg, D. Konstantinou, J. Kotta, K. Kowalczewska-Madura, A. Kozak, B. Kulawig, J. Kupagme, I. Kušan, R. Laarmaa, P. Laas, S. Langenheder, A. Lanzén, A. Lateef, M. Ligi, T. Löffler, U. Lortou, K. Lujza, T. MacConnell, I. Maček, P. Macreadie, K. Maileht, F. Marazzi, L. Marcello, S. Markovskaja, A. Martin, S. Martínez, V. Mata, N. Matočec, R. McKay, K. McKindles, M. Mehrshad, M. Menéndez, N. Merino, A. Mešić, S. Moctar, M. Moza, P. Nõges, T. Nõges, R. O'Hanlon, B. Öğlü, J. Oja, W. Okello, H. Orav-Kotta, P. Orr, I. Osemwegie, J. Padisák, V. Pajunen, M. Panou, A. Papatheodoulou, M. Pavlovska, J. Pearman, H. Pehlak, X. Peng, A. Pereira, R. Pereira, B. Pernecker, F. Picazo, S. Pinnow, P. Pochekutova, S. Põlme, X. Pontevedra-Pombal, A. Pošta, Y. Prekrasna-Kviatkovska, J. Pruuli, M. Pruuli, T. Pruuli, N. Radoja, S. Rahimlou, R. Rannap, S. Rasconi, A. Rasmussen, W. Remmers, L. Reyes, G. Rhodes, C. Roe, O. Rojas-Castillo, T. Roslin, K. Runnel, J. Rusch, M. Rybak, P. Rychtecký, S. Sahadevan, A. Saitta, A. Salehi-Najafabadi, I. Santi, J. Sarapuu, R. B. Schäfer, A. Schneeweiss, B. Scholz, G. Selmeczy, M. Smederevac-Lalić, R. Sommaruga, J. Stetler, E. Stoica, S. Stoll, D. Strand, M. Tamm, K. Tapolczai, J. Tarand, S. Teurlincx, J. Thompson, G. Thomson-Laing, L. Tiirmann, Z. Tkalčec, I. Trbojević, S. Trevathan-Tackett, N. Tsiarta, A. Tuvikene, L. Tuvikene, M. Vacaflores-Argandoña, T. Vahter, K. Vaino, A. L. Val, M.J. Vandergoes, A. Vasemägi, A. Vask, M. Vasquez, J. Veríssimo, J. Vesamäki, L. Virta, P. Visser, A. Viza, T. Vrålstad, C. S. Ward, P. Waryszak, J. Wierenga, P. Wilson, S. Wood, A. Woźniczka, C. Wurzbacher, P. Zingel, P. Znachor, T.E. E. dela Cruz, K. Panksep

Barrier island geomorphic complexity drives storm and post-storm response Barrier island geomorphic complexity drives storm and post-storm response

Barrier islands are at the forefront of climate-driven changes, with their resiliency threatened by rapid fluctuations in the physical drivers that shape them. Quantifying magnitudes and directions of storm-driven sediment fluxes and rates and modes of sediment recovery is essential for predicting barrier island trajectories. Yet scarce shoreface observations have limited such efforts...
Authors
Jennifer L. Miselis, Noreen A. Buster, Daniel J. Ciarletta, Julie Bernier, Emily Ann-Yi Wei, Rose Elizabeth Palermo

Inverse modeling for post-wildfire hydrologic process understanding over snow-dominated watersheds Inverse modeling for post-wildfire hydrologic process understanding over snow-dominated watersheds

Wildfire-induced changes to vegetation and soil properties can alter snowpack dynamics and hydrologic processes in ways that complicate predictions of post-wildfire water availability. To better understand these effects, we coupled the Parameter ESTimation in C++ (PEST++) software with the Weather Research & Forecasting Hydrologic model (WRF-Hydro) across three burned, snow-dominated...
Authors
Trevor Fuess Partridge, Michelle A. Walvoord, Sheila F. Murphy, Michael N. Fienen, Aubrey L Dugger, Brian A. Ebel

Abrupt onset and persistent downstream effects of acid rock drainage on rivers across northwest Arctic Alaska Abrupt onset and persistent downstream effects of acid rock drainage on rivers across northwest Arctic Alaska

Arctic streams and rivers are increasingly vulnerable to degradation from permafrost thaw that releases toxic elements via natural acid rock drainage. However, the spatial and temporal evolution of acid rock drainage on river chemistry across diverse mineral settings remain poorly constrained. Here, water chemistry in six watersheds across Alaska's Brooks Range (2022–2024) quantified the...
Authors
Taylor G. Evinger, Jonathan A. O'Donnell, Michael P. Carey, Joshua C. Koch, Carson A. Baughman, Kenneth R. Hill, Rebecca J. Frei, Brett A. Poulin

A genomic tool to tackle cryptic diversity demonstrates the potential for off-target use of GT-seq panels A genomic tool to tackle cryptic diversity demonstrates the potential for off-target use of GT-seq panels

A comprehensive understanding of life history is vital to successful species conservation and management. When different life history stages are accompanied by considerable morphological or cryptic variation, such as the egg and larval phases exhibited by most fishes, genomic tools are essential for identifying species so that early-life ecology questions can be studied. Genotyping-in...
Authors
Amanda Susanne Ackiss, Mark R. Vinson, Ann J. Ropp, Kristen M. Gruenthal, Trevor J. Krabbenhoft, Joseph V. Siegel, Wendylee Stott, Daniel L. Yule, Wesley A. Larson

Application of novel encounter and predation models to the natural behavior of slimy sculpin Cottus cognatus Application of novel encounter and predation models to the natural behavior of slimy sculpin Cottus cognatus

Sculpins play a critical mid-trophic role in lacustrine food webs, converting production by benthic and migrating pelagic invertebrates into biomass available to higher trophic levels. Although sculpin diets and habitat choices are relatively well described, much less is known about their in situ behavior which governs trophic interactions and, in part, prey behavior. We measured the...
Authors
Eden J Forbes, Jonah T. Ballard, Brian O’Malley, Jason D Stockwell
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