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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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Characterizing mauka-to-makai connections for aquatic ecosystem conservation on Maui, Hawaiʻi Characterizing mauka-to-makai connections for aquatic ecosystem conservation on Maui, Hawaiʻi

Mauka-to-makai (mountain to sea in the Hawaiian language) hydrologic connectivity – commonly referred to as ridge-to-reef – directly affects biogeochemical processes and socioecological functions across terrestrial, freshwater, and marine systems. The supply of freshwater to estuarine and nearshore environments in a ridge-to-reef system supports the food, water, and habitats utilized by...
Authors
Ella Wilmot, Jesse P. Wong, Yinphan Tsang, Abigail J. Lynch, Dana M. Infante, Kirsten L. L. Oleson, Ayron Strauch, Hannah Clilverd

An invasive prey provides long-lasting silver spoon effects for an endangered predator An invasive prey provides long-lasting silver spoon effects for an endangered predator

The natal environment can have long-term fitness consequences for individuals, particularly via ‘silver spoon’ or ‘environmental matching’ effects. Invasive species could alter natal effects on native species by changing species interactions, but this potential remains unknown. Using 17 years of data on 2588 individuals across the entire US breeding range of the endangered snail kite...
Authors
Caroline L. Poli, Ellen P. Robertson, Julien Martin, Abby Powell, Robert J. Fletcher

A global ensemble of ocean wave climate statistics from contemporary wave reanalysis and hindcasts A global ensemble of ocean wave climate statistics from contemporary wave reanalysis and hindcasts

There are numerous global ocean wave reanalysis and hindcast products currently being distributed and used across different scientific fields. However, there is not a consistent dataset that can sample across all existing products based on a standardized framework. Here, we present and describe the first coordinated multi-product ensemble of present-day global wave fields available to...
Authors
Joao Morim, Li H. Erikson, Mark Hemer, Ian Young, Xiaochun Wang, Nobuhito Mori, T. Shimura, Justin Stopa, Claire Trenham, Lorenzo Mentaschi, S. Gulev, V.D. Sharmar, L. Bricheno, Judy Wolf, Ole Aarnes, Paula Camus, J Bidlot, A. Semedo, B. Reguero, T. Wahl

River bathymetry retrieval from Landsat-9 images based on neural networks and comparison to SuperDove and Sentinel-2 River bathymetry retrieval from Landsat-9 images based on neural networks and comparison to SuperDove and Sentinel-2

The Landsat mission has kept an eye on our planet, including water bodies, for 50 years. With the launch of Landsat-9 and its onboard Operational Land Imager 2 (OLI-2) in September 2021, more subtle variations in brightness (14-bit dynamic range) can be captured than previous sensors in the Landsat series (e.g., 12-bit Landsat-8). The enhanced radiometric resolution of OLI-2 appeals to...
Authors
Milad Niroumand-Jadidi, Carl J. Legleiter, Francesca Bovolo

Projected resurgence of COVID-19 in the United States in July—December 2021 resulting from the increased transmissibility of the Delta variant and faltering vaccination Projected resurgence of COVID-19 in the United States in July—December 2021 resulting from the increased transmissibility of the Delta variant and faltering vaccination

In Spring 2021, the highly transmissible SARS-CoV-2 Delta variant began to cause increases in cases, hospitalizations, and deaths in parts of the United States. At the time, with slowed vaccination uptake, this novel variant was expected to increase the risk of pandemic resurgence in the US in summer and fall 2021. As part of the COVID-19 Scenario Modeling Hub, an ensemble of nine...
Authors
Shaun Truelove, Claire P. Smith, Michelle Qin, Luke Mullany, Rebecca K. Borchering, Justin Lessler, Katriona Shea, Emily Howerton, Lucie Contamin, John Levander, J. Kerr, Harry Hochheiser, Matt Kinsey, Kate Tallaksen, Shelby Wilson, Lauren Shin, Kaitlin Rainwater-Lovett, Joseph Lemaitre, Juan Dent, Joshua Kaminsky, Elizabeth C. Lee, Javier Perez-Saez, Alison Hill, Dean Karlen, Matteo Chinazzi, Jessica Davis, Kunpeng Mu, Xinyue Xiong, Ana Pastore y Piontti, Alessandro Vespignani, Ajitesh Srivastava, Przemyslaw Porebski, Srinivasan Venkatramanan, Aniruddha Adiga, Bryan Lewis, Brian Klahn, Joseph Outten, M. Orr, G. Harrison, Benjamin Hurt, Jiangzhuo Chen, Anil Vullikanti, Madhav Marathe, Stefan Hoops, Parantapa Bhattacharya, Dustin Machi, Shi Chen, Rajib Paul, Daniel Janies, Jean-Claude Thill, Marta Galanti, Teresa Yamana, Sen Pei, Jeffrey L. Shaman, Jessica Healy, Rachel B. Slayton, Matthew Biggerstaff, Michael A Johansson, Michael C. Runge, Cecile Viboud

The geochemical and textural transition between the Reef Package and its hanging wall, Stillwater Complex, Montana, USA The geochemical and textural transition between the Reef Package and its hanging wall, Stillwater Complex, Montana, USA

The highest grade Pd-Pt deposit on Earth, the J-M Reef, is hosted in coarse-grained to pegmatoidal cumulates called the Reef Package. Decades of mine development of the J-M Reef have revealed that a distinct discontinuity in rock fabric marks the top of the rock unit that hosts economic-grade sulfide mineralization. Mine geologists refer to this discontinuity as the hanging wall contact...
Authors
M. Christopher Jenkins, James E. Mungall, Michael L. Zientek, Kevin Butak, Sam R. Corson, Paul Holick, Ryan McKinley, Heather A. Lowers

Intrabrood variation in nestling mass among three sagebrush-associated songbirds Intrabrood variation in nestling mass among three sagebrush-associated songbirds

The young of some altricial bird species hatch asynchronously, which can lead to considerable size differences among siblings. Nestling traits such as body mass, moreover, can carry over and influence post-fledging survival. Despite the potential importance of nestling mass for reproductive outcomes, however, variation in nestling mass and relationships with brood size has been described...
Authors
Ashleigh M. Rhea, Jason D. Carlisle, Anna D. Chalfoun

Rare window into an ancient struggle Rare window into an ancient struggle

No abstract available.
Authors
Megan Carolyn Petersohn, Shannon Barber-Meyer

Evaluating the paleoenvironmental significance of sediment grain size in Bering Sea sediments during Marine Isotope Stage 11 Evaluating the paleoenvironmental significance of sediment grain size in Bering Sea sediments during Marine Isotope Stage 11

Grain size is an important textural property of sediments and is widely used in paleoenvironmental studies as a means to infer changes in the sedimentary environment. However, grain size parameters are not always easy to interpret without a full understanding of the factors that influence grain size. Here, we measure grain size in sediment cores from the Bering slope and the Umnak...
Authors
Natalie Thompson, Beth Elaine Caissie

Predictive models of phosphorus concentration and load in stormwater runoff from small urban residential watersheds in fall season Predictive models of phosphorus concentration and load in stormwater runoff from small urban residential watersheds in fall season

Urban street trees are a key part of public green infrastructure in many cities, however, leaf litter on streets is a critical biogenic source of phosphorus (P) in urban stormwater runoff during Fall. This study identified mass of street leaf litter (Mleaf) and antecedent dry days (ADD) as the top two explanatory parameters that have significant predictive power of event end-of-pipe P
Authors
Yi Wang, Anita Thompson, William R. Selbig

Special section overview: Effects of ecosystem change on North American percid populations. Special section overview: Effects of ecosystem change on North American percid populations.

Walleye Sander vitreus, Sauger S. canadensis, and Yellow Perch Perca flavescens (referred to as percids herein) are collectively among the most culturally and ecologically important fish species in North America. As ecosystems change in response to environmental drivers, such as climate change, nutrient loading, and invasive species, there is a need to understand how percid populations...
Authors
Hadley I. A. Boehm, Daniel A. Isermann, Mark J. Ermer, Lawrence D. Eslinger, Gretchen J. A. Hansen, Dale E. Logsdon

Controlling skewness in MOVE3 peak-flow record extensions Controlling skewness in MOVE3 peak-flow record extensions

Streamgage record extension methods such as the maintenance of variance Type 3 (MOVE3) method improve flood frequency estimates at a target streamgage by incorporating information from a nearby, hydrologically similar index streamgage. Bulletin 17C recommends using a variation of the MOVE3 method to estimate values at the target streamgage for only a subset of the available data at the...
Authors
Seth A. Siefken, Peter M. McCarthy
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