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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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Detrital zircon provenance of the Cretaceous-Neogene East Coast Basin reveals changing tectonic conditions and drainage reorganization along the Pacific margin of Zealandia Detrital zircon provenance of the Cretaceous-Neogene East Coast Basin reveals changing tectonic conditions and drainage reorganization along the Pacific margin of Zealandia

The Upper Cretaceous–Pliocene strata of New Zealand record ~100 m.y. of Zealandia’s evolution, including development of the Hikurangi convergent margin and Alpine transform plate boundary. A comprehensive, new detrital zircon U-Pb data set (8315 analyses from 61 samples) was generated along a ~700 km transect of the East Coast Basin of New Zealand. Age distributions were analyzed and...
Authors
Jared T. Gooley, Nora Maria Nieminski

Hypotheses and lessons from a native moth outbreak in a low-diversity, tropical rainforest Hypotheses and lessons from a native moth outbreak in a low-diversity, tropical rainforest

Outbreaks of defoliating insects in low-diversity tropical forests occur infrequently but provide valuable insights about outbreak ecology in temperate environments and in general. We investigated an extensive outbreak of the endemic koa moth (Scotorythra paludicola), which defoliated endemic koa trees (Acacia koa) over a third of their range on Hawai‘i Island during 2013 and 2014. At...
Authors
Paul C. Banko, Robert W. Peck, Stephanie G. Yelenik, Eben H. Paxton, Frank Bonaccorso, Kristina Montoya-Aiona, R. Flint Hughes, Steven S. Perakis

DSWEmod - The production of high-frequency surface water map composites from daily MODIS images DSWEmod - The production of high-frequency surface water map composites from daily MODIS images

Optical satellite imagery is commonly used for monitoring surface water dynamics, but clouds and cloud shadows present challenges in assembling complete water time series. To test whether the daily revisit rate of Moderate Resolution Imaging Spectroradiometer (MODIS) satellite imagery can reduce cloud obstruction and improve high-frequency surface water mapping, we compared map results...
Authors
Christopher E. Soulard, Eric Waller, Jessica J. Walker, Roy E. Petrakis, Britt Windsor Smith

Multi-species, multi-country analysis reveals North Americans are willing to pay for transborder migratory species conservation Multi-species, multi-country analysis reveals North Americans are willing to pay for transborder migratory species conservation

Migratory species often provide ecosystem service benefits to people in one country while receiving habitat support in other countries. The multinational cooperation that could help ensure continued provisioning of these benefits by migration may be informed by understanding the economic values people in different countries place on the benefits they derive from migratory wildlife.We...
Authors
Wayne E. Thogmartin, Michelle A. Haefele, James E. Diffendorfer, Darius J. Semmens, Jonathan J. Derbridge, Aaron M. Lien, Ta-Ken Huang, Laura Lopez-Hoffman

Increased juvenile native fish abundance following a major flood in an Arizona river Increased juvenile native fish abundance following a major flood in an Arizona river

Spring floods trigger spawning in many native fishes of the desert Southwest (USA), but less is known about fish community response when native fishes are rare. Here, we document change to native and nonnative fish captures and instream habitat features following a decade-high flooding event (2019) in the Verde River (AZ) where native fish captures were rare in the years pre-flood. Using
Authors
Christopher J. Jenney, Zach C. Nemec, Larissa N. Lee, Scott A. Bonar

Occurrence and sources of lead in private wells, Sturbridge, Massachusetts Occurrence and sources of lead in private wells, Sturbridge, Massachusetts

Lead (Pb) occurrence and sources and aqueous geochemistry were assessed in private wellhead and tap water at a targeted area of concern for possible exceedances and at a control area in the same geologic formation, and in wells at a nearby landfill in south-central Massachusetts (MA). Total Pb concentrations were below the U.S. Environmental Protection Agency (USEPA) Action Level of 15...
Authors
Leah M. Santangelo, Craig J. Brown, James B. Shanley, Michael J. Pribil, Danny Rutherford

Near-surface geophysics perspectives on Integrated, Coordinated, Open, Networked (ICON) Science Near-surface geophysics perspectives on Integrated, Coordinated, Open, Networked (ICON) Science

Pointing to the Integrated, Coordinated, Open, Networked Findability, Accessibility, Interoperability, and Reusability (ICON-FAIR) principles, we have determined several opportunities for implementation within the realm of near-surface geophysics (NSG), representing a broad range of data acquisition and processing technologies. Our work explores the multifaceted community-driven nature...
Authors
M. Salman, L. Slater, Martin A. Briggs, L. Li

You can go your own way: No evidence for social behavior based on kinship or familiarity in captive juvenile box turtles You can go your own way: No evidence for social behavior based on kinship or familiarity in captive juvenile box turtles

Behavioral interactions between conspecific animals can be influenced by relatedness and familiarity. Compared to other vertebrate taxa, considering such aspects of social behavior when housing captive reptiles has received less attention, despite the implications this could have for informing husbandry practices, enhancing welfare, and influencing outcomes of conservation translocations...
Authors
Sasha J. Tetzlaff, Jinelle H. Sperry, Brett Alexander DeGregorio

The Lunar Geophysical Network landing site science rationale The Lunar Geophysical Network landing site science rationale

The Lunar Geophysical Network (LGN) mission is proposed to land on the Moon in 2030 and deploy packages at four locations to enable geophysical measurements for 6–10 yr. Returning to the lunar surface with a long-lived geophysical network is a key next step to advance lunar and planetary science. LGN will greatly expand our primarily Apollo-based knowledge of the deep lunar interior by...
Authors
Heidi Haviland, Renee C. Weber, Clive Neal, Philippe Lognonne, Raphael Garcia, Nicholas Schmerr, Seiichi Nagihara, Robert Grimm, Douglas Currie, Simone Dell’Agnello, Thomas R. Watters, Mark Panning, Catherine L. Johnson, Ryuhei Yamada, Martin Knapmeyer, Lillian R. Ostrach, Taichi Kawamura, Noah Petro, Paul Bremner

Joint-species analysis reveals potential displacement of native fishes by non-native fishes within the Santa Ana River, California Joint-species analysis reveals potential displacement of native fishes by non-native fishes within the Santa Ana River, California

Accurate estimates of abundance are a cornerstone for resource managers to make effective decisions for fish conservation. However, multiple sampling methods often are required to sample fish communities, and ignoring the detection process can create substantial bias in latent state parameter estimation (e.g., abundance, survival). We developed a joint-species N-mixture model that...
Authors
Brock Huntsman, Larry R. Brown, Kai Palenscar, Chris Jones, Kerwin Russell, Heather Dyer, Brett Mills, Marissa L. Wulff, Jason May

Geologic and geomorphic evidence for multi-phase history of strands of the San Andreas fault through the San Gorgonio Pass structural knot, southern California Geologic and geomorphic evidence for multi-phase history of strands of the San Andreas fault through the San Gorgonio Pass structural knot, southern California

The San Gorgonio Pass region of southern California is a locus of extensive Quaternary deformation within a multi-strand section of the San Andreas fault zone. The geomorphology of the San Gorgonio Pass region reflects the complicated history of geologic events in the formation of this structurally complex region. We define fault-bounded blocks in San Gorgonio Pass and focus on two that...
Authors
Katherine J. Kendrick, Jonathan C. Matti, Nicholas C Barth

Partitioning ground motion uncertainty when conditioned on station data Partitioning ground motion uncertainty when conditioned on station data

Rapid estimation of earthquake ground shaking and proper accounting of associated uncertainties in such estimates when conditioned on strong‐motion station data or macroseismic intensity observations are crucial for downstream applications such as ground failure and loss estimation. The U.S. Geological Survey ShakeMap system is called upon to fulfill this objective in light of increased...
Authors
Davis T. Engler, Charles Worden, Eric M. Thompson, Kishor S. Jaiswal
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