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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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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An ensemble mean method for remote sensing of actual evapotranspiration to estimate water budget response across a restoration landscape An ensemble mean method for remote sensing of actual evapotranspiration to estimate water budget response across a restoration landscape
Estimates of actual evapotranspiration (ETa) are valuable for effective monitoring and management of water resources. In areas that lack ground-based monitoring networks, remote sensing allows for accurate and consistent estimates of ETa across a broad scale—though each algorithm has limitations (i.e., ground-based validation, temporal consistency, spatial resolution). We developed an...
Authors
Roy E. Petrakis, Laura M. Norman, Miguel L. Villarreal, Gabriel B. Senay, MacKenzie Friedrichs, Florance Cassassuce, Florent Gomis, Pamela L. Nagler
Source, migration pathways, and atmospheric release of geologic methane associated with the complex permafrost regimes of the outer Mackenzie River Delta, Arctic, Canada Source, migration pathways, and atmospheric release of geologic methane associated with the complex permafrost regimes of the outer Mackenzie River Delta, Arctic, Canada
Sources and fluxes of methane to the atmosphere from permafrost are significant but poorly constrained in global climate models. We present data collected from the variable permafrost setting of the outer Mackenzie River Delta, including observations of aquatic methane seepage, core determinations of in situ methane occurrence and seep gas isotope geochemistry. The sources and locations...
Authors
Scott Dallimore, Laura Lapham, Michelle Cote, Robert Bowen, Roger MacLeod, Hadley Marcek, C. Geoffrey Wheat, Timothy Collett
Chlorophyll a in lakes and streams of the United States (2005–2022) Chlorophyll a in lakes and streams of the United States (2005–2022)
The concentration of chlorophyll a in phytoplankton and periphyton represents the amount of algal biomass. We compiled an 18-year record (2005–2022) of pigment data from water bodies across the United States (US) to support efforts to develop process-based, machine learning, and remote sensing models for prediction of harmful algal blooms (HABs). To our knowledge, this dataset of nearly...
Authors
Sarah A. Spaulding, Lindsay R.C. Platt, Jennifer C. Murphy, S. Alex Covert, Judson Harvey
The where and why of large wood occurrence in the Upper Mississippi and Illinois Rivers The where and why of large wood occurrence in the Upper Mississippi and Illinois Rivers
Large wood (LW) plays important geomorphic and ecological roles in rivers and is widely used as a restoration tool. Changes to floodplain land use and historical removal have altered wood dynamics in fluvial systems globally. We know little about the distribution and dynamics of LW in great rivers (approximately >105 km2) like the Upper Mississippi and Illinois Rivers despite its...
Authors
Molly Van Appledorn, Kathi Jo Jankowski, Kaija Gahm, Serenity Budd, Douglas Baumann, Barbara Bennie, Richard A. Erickson, Roger J. Haro, Jason J. Rohweder
Potential hazards of polycyclic aromatic hydrocarbons in Great Lakes tributaries using water column and porewater passive samplers and sediment wquilibrium partitioning Potential hazards of polycyclic aromatic hydrocarbons in Great Lakes tributaries using water column and porewater passive samplers and sediment wquilibrium partitioning
The potential for polycyclic aromatic hydrocarbon (PAH)-related effects in benthic organisms is commonly estimated from organic carbon-normalized sediment concentrations based on equilibrium partitioning (EqP). Although this approach is useful for screening purposes, it may overestimate PAH bioavailability by orders of magnitude in some sediments, leading to inflated exposure estimates...
Authors
Austin K. Baldwin, Steven R. Corsi, David A. Alvarez, David L. Villeneuve, Gerald T. Ankley, Brett R. Blackwell, Marc A. Mills, Peter L. Lenaker, Michelle A. Nott
Temporal habitat use of mule deer in the Pueblo of Santa Ana, New Mexico Temporal habitat use of mule deer in the Pueblo of Santa Ana, New Mexico
Mule deer (Odocoileus hemionus) are important economically, culturally, and recreationally to the Pueblo of Santa Ana in central New Mexico, USA. Studies of habitat selection improve our understanding of mule deer ecology in central New Mexico and provide the Tribe with valuable information for management of mule deer. We used global positioning system telemetry-collar data collected on...
Authors
Daniel E. Bird, Laura D’Acunto, Daniel Ginter, Glenn Harper, Patrick A. Zollner
Lifetime reproductive characteristics of gray wolves Lifetime reproductive characteristics of gray wolves
Female and male cooperative breeders can use different strategies to maximize reproduction and fitness over their lifetimes. Answering questions about fitness in cooperative breeders requires long-term studies as well as complete data on group composition and size which can be exceedingly difficult to obtain. Using a long-term genetic data set of complete group pedigrees, I asked how...
Authors
David Edward Ausband
The development of China’s monopoly over cobalt battery materials The development of China’s monopoly over cobalt battery materials
While previous resource conflicts have often been linked to fuel minerals such as oil, future resource conflict may revolve around nonfuel minerals that enable strategic emerging technologies. During a 2010 diplomatic dispute, China reportedly blocked exports of rare earth elements to Japan, thereby leveraging China’s near-monopoly to threaten Japanese manufacturers of advanced...
Authors
Andrew L. Gulley
Middle-late Holocene paleolimnological changes in central Lake Tanganyika: Integrated evidence from the Kavala Island Ridge (Tanzania) Middle-late Holocene paleolimnological changes in central Lake Tanganyika: Integrated evidence from the Kavala Island Ridge (Tanzania)
Middle and Late Holocene sediments have not been extensively sampled in Lake Tanganyika, and much remains unknown about the response of the Rift Valley’s largest lake to major environmental shifts during the Holocene, including the termination of the African Humid Period (AHP). Here, we present an integrated study (sedimentology, mineralogy, and geochemistry) of a radiocarbon-dated...
Authors
Leandro Domingos-Luz, Michael J. Soreghan, Giliane G. Rasbold, Geoffrey S. Ellis, Justin E. Birdwell, Ishmael A. Kimirei, Christopher A. Scholz, Michael M. McGlue
Human activity drives establishment, but not invasion, of non-native plants on islands Human activity drives establishment, but not invasion, of non-native plants on islands
Island ecosystems are particularly susceptible to the impacts of invasive species. Many rare and endangered species that are endemic to islands are negatively affected by invasions. Past studies have shown that the establishment of non-native species on islands is related to native plant richness, habitat heterogeneity, island age, human activity, and climate. However, it is unclear...
Authors
William G. Pfadenhauer, Graziella Vittoria DiRenzo, Bethany A. Bradley
Evolutionary ecology of masting: Mechanisms, models, and climate change Evolutionary ecology of masting: Mechanisms, models, and climate change
Many perennial plants show mast seeding, characterized by synchronous and highly variable reproduction across years. We propose a general model of masting, integrating proximate factors (environmental variation, weather cues, and resource budgets) with ultimate drivers (predator satiation and pollination efficiency). This general model shows how the relationships between masting and...
Authors
Michal Bogdziewicz, Dave Kelly, Davide Ascoli, Thomas Caignard, Francesco Chianucci, Elizabeth E. Crone, Emilie Fleurot, Jessie Foest, Georg Gratzer, Tomika Hagiwara, Qingmin Han, Valentin Journe, Lea Keurinck, Katarzyna Kondrat, Ryan McClory, Jalene M. LaMontagne, Ignacio A. Mundo, Anita Nussbaumer, Iris Oberklammer, Misuzu Ohno, Ian S. Pearse, Mario B. Pesendorfer, Giulia Resente, Akiko Satake, Mitsue Shibata, Rebecca Snell, Jakub Szymkowiak, Laura Touzot, Rafal Zwolak, Magdalena Zywiec, Andrew Hacket-Pain
Microbial diversity, genomics, and phage–host interactions of cyanobacterial harmful algal blooms Microbial diversity, genomics, and phage–host interactions of cyanobacterial harmful algal blooms
The occurrence of cyanobacterial harmful algal blooms (cyanoHABs) is related to their physical and chemical environment. However, less is known about their associated microbial interactions and processes. In this study, cyanoHABs were analyzed as a microbial ecosystem, using 1 year of 16S rRNA sequencing and 70 metagenomes collected during the bloom season from Lake Okeechobee (Florida...
Authors
Lauren E. Krausfeldt, Elizaveta Shmakova, Hyo Won Lee, Viviana Mazzei, Keith A. Loftin, Robert P Smith, Emily E. Karwacki, Eric Fortman, B.H. Rosen, Hidetoshi Urakawa, Manoj Dadlani, Rita Colwell, Jose V. Lopez