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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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Movement patterns of invasive red swamp crayfish vary with sex and environmental factors Movement patterns of invasive red swamp crayfish vary with sex and environmental factors

Invasive species disproportionately invade freshwater ecosystems, threatening biodiversity. Defining when, where, and why aquatic invasive species move can help inform management strategies, yet the movement ecology of some of the most pervasive invasive species remains unknown. Red swamp crayfish (Procambarus clarkii; RSC) are the most widespread invasive crayfish and negatively affect...
Authors
Maggie Jo Raboin, Brian M. Roth, Aaron Sullivan, Ann L. Allert, Jim A. Stoeckel, Lucas R. Nathan, Kathleen B. Quebedeaux, Matthew D. Sholtis, Justin R. Smerud, Richard A. Erickson, Aaron R. Cupp

Linking age and social status of cooperative breeders to vulnerability throughout the harvest season Linking age and social status of cooperative breeders to vulnerability throughout the harvest season

Individual behaviors are influenced by environmental, genetic, and demographic factors. Some animals choose to live in groups and cooperatively breed, and their behaviors can change depending on dynamic factors such as group size and composition that affect group persistence. In Idaho, USA, gray wolves (Canis lupus) are harvested annually, providing an opportunity to investigate the...
Authors
Peter F. Rebholz, Sarah B. Bassing, Lisette P. Waits, David Edward Ausband

Characteristics of volcanic ash reveal changes in fragmentation and eruption dynamics at Poás volcano, Costa Rica, 2016–2019 Characteristics of volcanic ash reveal changes in fragmentation and eruption dynamics at Poás volcano, Costa Rica, 2016–2019

Determining whether fresh magma has reached the surface during a volcanic eruption can provide important information for forecasts of future activity, especially in the early stages of an eruption. However, identifying fresh, juvenile pyroclasts in tephra fall deposits can be challenging and inconclusive. We studied the products of explosions at Poás volcano, Costa Rica, in 2016–2019, a...
Authors
Monserrat Cascante, Thomas Giachetti, Heather M. Wright, Alexa R. Van Eaton, Geoffroy Avard

A review of post-wildfire adaptations of surface-water-quality models: Synthesis, gaps, and opportunities A review of post-wildfire adaptations of surface-water-quality models: Synthesis, gaps, and opportunities

As wildfires increasingly affect water-supply watersheds, the demand for models to predict water-quality responses is increasing. This work reviews and synthesizes existing post-wildfire applications of water-quality models in the context of geographic and ecohydrological distribution, hydrologic and water-quality response process representation, model parameterization, model and input...
Authors
Zachary M. Shephard, Trevor Fuess Partridge, Sheila F. Murphy, Michelle A. Walvoord, Brian A. Ebel

HarvestStat Africa – Harmonized subnational crop statistics for sub-Saharan Africa HarvestStat Africa – Harmonized subnational crop statistics for sub-Saharan Africa

Sub-Saharan Africa (SSA) faces severe agricultural data scarcity amidst high food insecurity and a large agricultural yield gap, making crop production data crucial for understanding and enhancing food systems. To address this gap, HarvestStat Africa presents the largest compilation of open-access subnational crop statistics and time-series across SSA. Based on agricultural statistics...
Authors
Donghoon Lee, Weston Anderson, Xuan Chen, Frank Davenport, Shraddhanand Shukla, Ritvik Sahajpal, Michael Budde, James Rowland, James Verdin, Liangzhi You, Matthieu Ahouangbenon, Kyle Frankel Davis, Endalkachew Kebede, Steffen Ehrmann, Christina Justice, Carsten Meyer

Pluvial and potential compound flooding in a coupled coastal modeling framework: New York City during post-tropical Cyclone Ida (2021) Pluvial and potential compound flooding in a coupled coastal modeling framework: New York City during post-tropical Cyclone Ida (2021)

Many coastal urban areas are prone to extreme pluvial flooding due to limitations in stormwater system capacity, with the additional potential for flooding compounded by storm surge, tides, and waves. Understanding and simulating these processes can improve prediction and flood risk management. Here, we adapt the Coupled Ocean–Atmosphere–Wave–Sediment Transport modeling framework (COAWST...
Authors
Shima Kasaei, Phillip M. Orton, David K. Ralston, John C. Warner

The relationship between body condition, body composition, and growth in amphibians The relationship between body condition, body composition, and growth in amphibians

Body condition of animals is often assumed to reflect advantages in survival or reproduction, but body condition indices may not reflect body composition, or condition may be unrelated to fitness-associated traits. The relationship between body condition indices and composition has rarely been quantified in amphibians, and body condition has not previously been related to growth in adult
Authors
Ross K. Hinderer, Blake R. Hossack, Lisa A. Eby

Additional common milkweed would help Canada meet its share of the trinational eastern migratory monarch butterfly recovery target Additional common milkweed would help Canada meet its share of the trinational eastern migratory monarch butterfly recovery target

The eastern migratory monarch butterfly (Danaus plexippus) population has declined by ∼84% between 1993 and 2024. Population recovery in the Midwestern United States is limited by the availability of the monarch's main host plant for egg laying—common milkweed (Asclepias syriaca). The extent to which common milkweed availability is limiting in other breeding regions is unknown. Our...
Authors
Greg W. Mitchell, Patrick Kirby, Jason Duffe, Lenore Fahrig, Judith Girard, Mark K. Johnston, Maxim Larrivee, Amanda E. Martin, Iman Momeni-Dehaghi, Jon Pasher, Elizabeth Rezek, Elisabeth Shapiro, Wayne E. Thogmartin, Darren Pouliot

Fisheries dependent and independent data inform a capture technique for an emerging invasive fish species in the mainstem Mississippi River; Black Carp Mylopharyngodon piceus Fisheries dependent and independent data inform a capture technique for an emerging invasive fish species in the mainstem Mississippi River; Black Carp Mylopharyngodon piceus

Black Carp Mylopharyngodon piceus were imported into the United States in the 1970s and 1980s for use in aquaculture; escape occurred and reported wild captures increased. Lacking species-specific capture methods, we assessed fisheries dependent incidental Black Carp catches for a common method, hoop nets, by kernel density analysis to identify an area of increased reporting and compare...
Authors
Patrick Kroboth, Michael E. Colvin, Courtney Broaddus

Comparison of lapilli otoliths and pectoral fin rays for estimating age of Northern Pikeminnows Comparison of lapilli otoliths and pectoral fin rays for estimating age of Northern Pikeminnows

The Northern Pikeminnow Ptychocheilus oregonensis is a piscivorous cyprinid native to western North America. Information on the best structure for estimating the age of Northern Pikeminnows is a key knowledge gap that may limit inquiries on management efforts. Thus, the objective of this study was to evaluate between-reader precision and concordance between age estimates for lapilli...
Authors
Caleb M. Wilson, Bryce Marciniak, Mike Thomas, Jordan Messner, Matthew P. Corsi, Michael C. Quist

Integrating climate change, biological invasions, and infectious wildlife diseases Integrating climate change, biological invasions, and infectious wildlife diseases

Climate change is likely to affect infectious diseases that are facilitated by biological invasions, with repercussions for wildlife conservation and zoonotic risks. Current invasion management and policy are underprepared for the future risks associated with such invasion-related wildlife diseases. By considering evidence from bioclimatology, invasion biology, and disease research, we...
Authors
David W. Thieltges, David B. Conn, Ross N. Cuthbert, Alison M. Dunn, Rosa Jolma, M. Camille Hopkins, Volodimir Sarabeev, Sander Smolders, Carol A. Stepien, K. Mathias Wegner, Patrick M. Kocovsky

In situ Re-Os geochronology of Re-rich Palaeogene molybdenite by LA-ICP-MS/MS In situ Re-Os geochronology of Re-rich Palaeogene molybdenite by LA-ICP-MS/MS

In situ Re–Os geochronology by LA-ICP-MS/MS was previously demonstrated by reacting Os with CH4 or N2O reaction gasses. However, for both reactions, a minor proportion of the Re parent isotope also reacts, potentially leading to significant isobaric interferences of 187Re on 187Os, especially for young samples with little radiogenic in-growth. Here we present an interlaboratory...
Authors
Stijm Glorie, Jay M. Thompson, Sarah E. Gilbert, Amanda Souders
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