Recent carbon storage and burial exceed historic rates in the San Juan Bay estuary peri-urban mangrove forests (Puerto Rico, United States)
Cathleen Wigand, Meagan J. Eagle, Benjamin Branoff, Stephen Balogh, Kenneth Miller, Rose M. Martin, Alana Hanson, Autumn Oczkowski, Evelyn Huertas, Joseph Loffredo, Elizabeth Watson
2021, Frontiers in Forests and Global Change (4)
Mangroves sequester significant quantities of organic carbon (C) because of high rates of burial in the soil and storage in biomass. We estimated mangrove forest C storage and accumulation rates in aboveground and belowground components among five sites along an urbanization gradient in the San Juan Bay Estuary, Puerto Rico....
Direct and size-mediated effects of temperature and ration-dependent growth rates on energy reserves in juvenile anadromous alewives (Alosa pseudoharengus)
Liang Guo, Stephen D. McCormick, Eric T. Schultz, Adrian Jordaan
2021, Journal of Fish Biology (99) 1236-1246
Growth rate and energy reserves are important determinants of fitness and are governed by endogenous and exogenous factors. Thus, examining the influence of individual and multiple stressors on growth and energy reserves can help estimate population health under current and future conditions. In young anadromous fishes, freshwater habitat quality determines...
NGA-East ground-motion characterization model Part II: Implementation and hazard implications
Robert Youngs, Christine A. Goulet, Yousef Bozorgnia, Nicolas Kuehn, Linda Al Atik, Robert Graves, Gail M. Atkinson
2021, Earthquake Spectra (37) 1283-1330
As a companion article to Goulet et al., we describe implementation of the NGA-East ground motion characterization (GMC) model in probabilistic seismic hazard analysis (PSHA) for sites in the Central and Eastern United States (CEUS). We present extensions to the EPRI/DOE/NRC seismic source characterization (SSC) model for...
Relative risk of groundwater-quality degradation near California (USA) oil fields estimated from 3H, 14C, and 4He
Peter B. McMahon, Matthew K. Landon, Tracy Davis, Michael Wright, Celia Z. Rosecrans, Robert Anders, Michael Land, Justin T. Kulongoski, Andrew G. Hunt
2021, Applied Geochemistry (131)
Relative risks of groundwater-quality degradation near selected California oil fields are estimated by examining spatial and temporal patterns in chemical and isotopic data in the context of groundwater-age categories defined by tritium and carbon-14. In the Coastal basins, western San Joaquin Valley (SJV),...
Effects of climate and irrigation on GRACE-based estimates of water storage changes in major US aquifers
Bridget R. Scanlon, Ahsraf Rateb, Donald R. Pool, Ward E. Sanford, Himanshu Save, Alexander Y. Sun, Di Long, Brian Fuchs
2021, Environmental Research Letters (16)
Understanding climate and human impacts on water storage is critical for sustainable water-resources management. Here we assessed climate and human drivers of total water storage (TWS) variability from Gravity Recovery and Climate Experiment (GRACE) satellites compared with drought severity and irrigation water use in 14 major aquifers...
The liquefaction record of past earthquakes in the Central Virginia Seismic Zone, Eastern United States
Martitia P. Tuttle, Kathleen Dyer-Williams, Mark W. Carter, Steven L. Forman, Kathleen Tucker, Zamara Fuentes, Carlos Velez, Laurel Bauer
2021, Seismological Research Letters (92) 3126-3144
Following the 2011 moment magnitude, M">MM 5.7 Mineral, Virginia, earthquake, we conducted a search for paleoliquefaction features and found 41 sand dikes, sand sills, and soft‐sediment deformation features at 24 sites exposed in cutbanks along several rivers:...
Sediment concentrations and loads upstream from and through John Redmond Reservoir, east-central Kansas, 2010–19
Ariele R. Kramer, Cara L. Peterman-Phipps, Matthew D. Mahoney, Bradley S. Lukasz
2021, Scientific Investigations Report 2021-5037
Streambank erosion and reservoir sedimentation are primary concerns of resource managers in Kansas and throughout many regions of the United States and negatively affect flood control, water supply, and recreation. The Cottonwood and upper Neosho Rivers drain into John Redmond Reservoir, and since reservoir completion in 1964, there has been...
Multivariate classification of the crude oil petroleum systems in southeast Texas, USA, using conventional and compositional data analysis of biomarkers
Ricardo A. Olea, J. A Martin-Fernandez, William H. Craddock
Peter Fitzmoser, Karel Hron, Josep Antoni Martin-Fernandez, Javier Palarea-Albaladejo, editor(s)
2021, Book chapter, Advances in compositional data analysis—Festschrift in honor of Vera-Pawlowsky-Glahn
Chemically, petroleum is an extraordinarily complex mixture of different types of hydrocarbons that are now possible to isolate and identify because of advances in geochemistry. Here, we use biomarkers and carbon isotopes to establish genetic differences and similarities among oil samples. Conventional approaches for evaluating biomarker and carbon isotope relative...
Greater Yellowstone climate assessment: Past, present, and future climate change in the greater Yellowstone watersheds
Steven W. Hostetler, Cathy Whitlock, Bryan Shuman, David Liefert, Charles Wolf Drimal, Scott Bischke
Jay R. Alder, Gregory T. Pederson, editor(s)
2021, Report
The Greater Yellowstone Area (GYA) is one of the last remaining large and nearly intact temperate ecosystems on Earth. GYA was originally defined in the 1970s as the Greater Yellowstone Ecosystem, which encompassed the minimum range of the grizzly bear. The boundary now includes about 22 million acres (8.9 million...
Diel patterns of predation and fledging at nests of four species of grassland songbirds
Christine Ribic, David J. Rugg, Kevin Ellison, Nicola Koper, Pamela J. Pietz
2021, Ecology and Evolution (11) 6913-6926
Although it is common for nestlings to exhibit a strong bias for fledging in the morning, the mechanisms underlying this behavior are not well understood. Avoiding predation risk has been proposed as a likely mechanism by a number of researchers. We used video surveillance records from studies of grassland birds...
A survey of storm-induced seaward-transport features observed during the 2019 and 2020 hurricane seasons
Jin-Si R. Over, Jenna A. Brown, Christopher R. Sherwood, Christie Hegermiller, Phillipe Alan Wernette, Andrew C. Ritchie, Jonathan A. Warrick
2021, Shore and Beach (89) 31-40
Hurricanes are known to play a critical role in reshaping coastlines, but often only impacts on the open ocean coast are considered, ignoring seaward-directed forces and responses. The identification of subaerial evidence for storm-induced seaward transport is a critical step towards understanding its impact on coastal resiliency. The visual features,...
Ecological effects of climate-driven salinity variation in the San Francisco Estuary: Can we anticipate and manage the coming changes?
Cameron K Chalambor, Edward S. Gross, Edwin D. Grosholz, Ken M Jeffries, John L. Largier, Stephen D. McCormick, Ted Sommer, Jonathan P Velotta, Andrew Whitehead
2021, San Francisco Estuary and Watershed Science (19) article 3
Climate change-driven sea level rise and altered precipitation regimes are predicted to alter patterns of salt intrusion within the San Francisco Estuary. A central question is: Can we use existing knowledge and future projections to predict and manage the anticipated ecological impacts?...
Perfluoroalkyl substances in plasma of smallmouth bass from the Chesapeake Bay Watershed
Vicki S. Blazer, Stephanie E. Gordon, Heather L. Walsh, Cheyenne R. Smith
2021, International Journal of Environmental Research and Public Health (11)
Smallmouth bass Micropterus dolomieu is an economically important sportfish and within the Chesapeake Bay watershed has experienced a high prevalence of external lesions, infectious disease, mortality events, reproductive endocrine disruption and population declines. To date, no clear or consistent associations with contaminants measured in fish tissue or surface water have been...
Flow characteristics and salinity patterns in tidal rivers within the northern Ten Thousand Islands, southwest Florida, water years 2007–19
Amanda C. Booth, Travis M. Knight
2021, Scientific Investigations Report 2021-5028
Freshwater flow to the Ten Thousand Islands (TTI) estuary has been altered by the construction of the Tamiami Trail and construction of features in the now defunct Southern Golden Gate Estates development. This development included four associated canals that combine into the Faka Union Canal, which discharges into the TTI...
Onset and evolution of Kilauea’s 2018 flank eruption and summit collapse from continuous gravity
Michael Poland, Daniele Carbone, Matthew R. Patrick
2021, Earth and Planetary Science Letters (567)
Prior to the 2018 lower East Rift Zone (ERZ) eruption and summit collapse of Kīlauea Volcano, Hawai‘i, continuous gravimeters operated on the vent rims of ongoing eruptions at both the summit and Pu‘u ‘Ō‘ō. These instruments captured the onset of the 2018 lower ERZ eruption and the effects of lava...
Do crayfish affect stream ecosystem response to riparian vegetation removal?
Maura P. Dudley, Kelsey Solomon, Seth J. Wenger, C. Rhett Jackson, Mary Freeman, Katherine J. Elliott, Chelcy F. Miniat, Catherine M. Pringle
2021, Freshwater Biology (66) 1423-1435
1. Riparian vegetation management alters stream basal resources, but stream ecosystem responses partly depend on top-down interactions with in-stream consumers. Large-bodied omnivores can exert particularly strong influences on stream benthic environments through consumption of food resources and physical disturbance of the benthos. Trophic dynamics studies conducted within the context of...
Sin Nombre virus prevalence from 2014–2017 in wild deer mice, Peromyscus maniculatus, on five of the California Channel Islands
John L. Orrock, Brian Connolly, Peter Guiden, Jennifer L. Chandler, Gebbiena M. Bron, Charles A. Drost, David K. Garcelon
2021, Zoonoses and Public Health (68) 849-853
Sin Nombre virus (SNV) is a zoonotic virus that is highly pathogenic to humans. The deer mouse, Peromyscus maniculatus, is the primary host of SNV, and SNV prevalence in P. maniculatus is an important indicator of human disease risk. Because the California Channel Islands contain permanent human settlements, receive hundreds of thousands of visitors...
Time marches on, but do the causal pathways driving instream habitat and biology remain consistent?
Richard H Walker, Matthew J. Ashton, Matthew J. Cashman, Rosemary M. Fanelli, Kevin P. Krause, Gregory E. Noe, Kelly O. Maloney
2021, Science of the Total Environment (789)
Stream ecosystems are complex networks of interacting terrestrial and aquatic drivers. To untangle these ecological networks, efforts evaluating the direct and indirect effects of landscape, climate, and instream predictors on biological condition through time are needed. We used structural equation modeling and leveraged a...
Range-wide declines of northern spotted owl populations in the Pacific Northwest: A meta-analysis
Alan B. Franklin, Katie M. Dugger, Damon B. Lesmeister, Raymond J. Davis, J. David Wiens, Gary C. White, James D. Nichols, James E. Hines, Charles B. Yackulic, Carl J. Schwarz, Steven H. Ackers, Andrew L. Stevens, Larissa L. Bailey, Robin Bown, Jesse Burgher, Kenneth P. Burnham, Peter C. Carlson, Tara Chestnut, Mary M Conner, Krista E. Dilione, Eric D. Forsman, Elizabeth M. Glenn, Scott A. Gremel, Keith A. Hamm, Dale R. Herter, J. Mark Higley, Rob B. Horn, Julianna M. Jenkins, William L. Kendall, David W Lamphear, Christopher McCafferty, Trent L. McDonald, Janice A Reid, Jeremy T. Rockweit, David C. Simon, Stan G. Sovern, James Swingle, Heather Wise
2021, Biological Conservation, (259)
The northern spotted owl (Strix occidentalis caurina) inhabits older coniferous forests in the Pacific Northwest and has been at the center of forest management issues in this region. The immediate threats to this federally listed species include habitat loss and competition with barred owls (Strix...
Sources of volcanic tremor associated with the summit caldera collapse during the 2018 east rift eruption of Kīlauea Volcano, Hawai'i
J. Soubestre, B. Chouet, Phillip B. Dawson
2021, Journal of Geophysical Research: Solid Earth (126)
Volcanic tremor occurring at the beginning of the 2018 Kīlauea eruption is characterized using both seismic and tilt data recorded at the Kīlauea summit. An automatic seismic network-based approach detects several types of tremor including (a) 0.5–1 Hz long-period tremor preceding the eruption, located at the south-southwest edge...
GIS-based identification of areas that have resource potential for sediment-hosted Pb-Zn deposits in Alaska
Karen D. Kelley, Garth E. Graham, Keith A. Labay, Nora B. Shew
2021, Open-File Report 2020-1147
A state-wide Geographic Information System analysis was conducted to assess prospectivity for lead (Pb) and zinc (Zn) in sediment-hosted deposits in Alaska. The datasets that were utilized include publicly available geospatial datasets of lithologic, geochemical, and mineral occurrence data. Key characteristics of Pb-Zn deposits were identified in available datasets and...
Incorporating climate change in a harvest risk assessment for polar bears Ursus maritimus in Southern Hudson Bay
Eric V. Regehr, Markus Dyck, Samuel A. Iverson, David S. Lee, Nicholas J Lunn, Joseph M Northrup, Marie-Claude Richer, Guillaume Szor, Michael C. Runge
2021, Biological Conservation (258)
Arctic marine mammals are harvested by Indigenous people for subsistence and are socially and culturally important. For ice-dependent species like the polar bear Ursus maritimus, management and conservation require understanding interactions between harvest and sea-ice loss due to climate change. We developed a demographic...
Rupture passing probabilities at fault bends and steps, with application to rupture length probabilities for earthquake early warning
Glenn Biasi, Steven G. Wesnousky
2021, Bulletin of the Seismological Society of America (111) 2235-2247
Earthquake early warning (EEW) systems can quickly identify the beginning of a significant earthquake rupture, but the first seconds of seismic data have not been found to predict the final rupture length. We present two approaches for estimating probabilities of rupture length given the rupture initiation from an EEW system....
Molluscan aminostratigraphy of the US Mid-Atlantic Quaternary coastal system: Implications for onshore-offshore correlation, paleochannel and barrier island evolution, and local late Quaternary sea-level history
John Wehmiller, Laura L. Brothers, Kelvin Ramsey, David S. Foster, C.R. Mattheus, Christopher Hein, Justin L. Shawler
2021, Quaternary Geochronology (66)
The Quaternary record of the US Mid-Atlantic coastal system includes onshore emergent late Pleistocene shoreline deposits, offshore inner shelf and barrier island units, and paleovalleys formed during multiple glacial stage sea-level lowstands. The geochronology of this coastal system is based on uranium series, radiocarbon, amino acid racemization (AAR), and optically...
Modeling of future COVID-19 cases, hospitalizations, and deaths, by vaccination rates and nonpharmaceutical intervention scenarios — United States, April–September 2021
Rebecca K. Borchering, Cecile Viboud, Emily Howerton, Claire P. Smith, Shaun Truelove, Michael C. Runge, Nicholas G. Reich, Lucie Contamin, John Levander, Jessica Salerno, Wilbert van Panhuis, Matt Kinsey, Kate Tallaksen, R. Freddy Obrecht, Laura Asher, Cash Costello, Michael Kelbaugh, Shelby Wilson, Lauren Shin, Molly Gallagher, Luke Mullany, Kaitlin Rainwater-Lovett, Joseph Lemaitre, Juan Dent, Kyra Grantz, Joshua Kaminsky, Stephen Lauer, Elizabeth Lee, Hannah Meredith, Javier Perez-Saez, Lindsay T. Keegan, 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, James Schlitt, Patrick Corbett, Pyrros A. Telionis, Lijing Wang, Akhil S. Peddireddy, Benjamin Hurt, Jiangzhuo Chen, Anil Vullikanti, Madhav Marathe, Jessica Healy, Rachel B. Slayton, Matthew Biggerstaff, Michael A Johansson, Katriona Shea, Justin Lessler
2021, Morbidity and Mortality Weekly Report (70) 719-724
What is already known about this topic?Increases in COVID-19 cases in March and early April occurred despite a large-scale vaccination program. Increases coincided with the spread of SARS-CoV-2 variants and relaxation of nonpharmaceutical interventions (NPIs).What is added by this report?Data from six models indicate that with high vaccination coverage and...
