Isolating detrital and diagenetic signals in magnetic susceptibility records from methane-bearing marine sediments
Joel P. L. Johnson, Stephen C. Phillips, William Clyde, Liviu Giosan, Marta E. Torres
2021, Geochemistry, Geophysics, Geosystems (22)
Volume-dependent magnetic susceptibility (κ) is commonly used for paleoenvironmental reconstructions in both terrestrial and marine sedimentary environments where it reflects a mixed signal between primary deposition and secondary diagenesis. In the marine environment, κ is strongly influenced by the abundance of ferrimagnetic minerals regulated by sediment transport processes. Post-depositional alteration...
Modeling watershed carbon dynamics as affected by land cover change and soil erosion
Jinxun Liu, Benjamin M. Sleeter, Paul Selmants, Jiaojiao Diao, Qiang Zhou, Bruce Worstell, Monica Mei Jeen Moritsch
2021, Ecological Modelling (459)
Process-based ecosystem carbon cycle models typically incorporate vegetation growth, vegetation mortality, and soil respiration as well as the biotic and environmental drivers that influence these variables. However, few spatially explicit process models can efficiently incorporate the influence of land cover change and carbon lateral movement at regional scales or high...
Foraging behavior in a generalist snake (brown treesnake, Boiga irregularis) with implications for avian reintroduction and recovery
Melia G. Nafus, Peter X. Xiong, Eben H. Paxton, Amy A. Yackel Adams, Scott Michael Goetz
2021, Applied Animal Behavior Science (243)
Broad foraging classifications, such as generalist or specialist forager, are generally beneficial for population management in defining expectations of typical behavior. However, better understanding as to how individual variance in behavior interfaces with management actions, such as control of an invasive predator (such as brown...
Forecasting drought probabilities for streams in the northeastern United States
Samuel H. Austin
2021, Scientific Investigations Report 2021-5084
Maximum likelihood logistic regression (MLLR) models for the northeastern United States forecast drought probability estimates for water flowing in rivers and streams using methods previously identified and developed. Streamflow data from winter months are used to estimate chances of hydrological drought during summer months. Daily streamflow data collected from 1,143...
Impacts of neonicotinoid seed treatments on the wild bee community in agricultural field margins
Anson R. Main, Elisabeth B. Webb, Keith W. Goyne, Robert Abney, Doreen C. Mengel
Yolanda Pico, editor(s)
2021, Science of the Total Environment (786) 1-9
Wild bees support global agroecosystems via pollination of agricultural crops and maintaining diverse plant communities. However, with an increased reliance on pesticides to enhance crop production, wild bee communities may inadvertently be affected through exposure to chemical residues. Laboratory and semi-field studies have demonstrated lethal and sublethal effects of neonicotinoids on limited genera...
Estimating the effects of fish quality and size on the economic value of fishing in Oklahoma streams and rivers: A revealed preference and contingent behavior approach
O. Joshi, B. Chapagain, James M. Long, B. York, A.T. Taylor
2021, Fisheries Research (244)
Fishing in Oklahoma’s rivers and streams provides a unique experience for anglers in the state. Despite its popularity, information on total demand and economic benefits associated with stream fishing is limited in the state. Research on the role of site quality indicators, such as fish size and quantity, on recreational...
Understanding grass invasion, fire severity, and Acacia koa regeneration for forest restoration in Hawaiʻi Volcanoes National Park
Hamilton Natalia, Stephanie G. Yelenik, Tara Durboraw, Robert Cox, Nathan S. Gill
2021, Land (10)
With invasive grasses increasing wildfire occurrence worldwide, a better understanding of the relationships between native plants, fire, and invasive grass is needed to help restoration plans facilitate ecosystem resilience. Invasive grasses are particularly problematic for altering fire regimes in the tropics, yet in Hawaiʻi, restoration sites are...
A petrological and conceptual model of Mayon volcano (Philippines) as an example of an open-vent volcano
Dawn Catherine Sweeney Ruth, Fidel Costa
2021, Bulletin of Volcanology (83)
Mayon is a basaltic andesitic, open-vent volcano characterized by persistent passive degassing from the summit at 2463 m above sea level. Mid-size (<0.1 km3) and mildly explosive eruptions and occasional phreatic eruptions have occurred approximately every 10 years for over a hundred years. Mayon’s plumbing system structure, processes, and time scales driving...
The potential of satellite remote sensing time series to uncover wetland phenology under unique challenges of tidal setting
Gwendolyn Joelle Miller, Iryna Dronova, Patricia Oikawa, Sara Helen Knox, Lisamarie Windham-Myers, Julie Shahan, Ellen Stuart-Haëntjens
Charles R. Bostater Jr., editor(s)
2021, Remote Sensing (13) 1-28
While growth history of vegetation within upland systems is well studied, plant phenology within coastal tidal systems is less understood. Landscape-scale, satellite-derived indicators of plant greenness may not adequately represent seasonality of vegetation biomass and productivity within tidal wetlands due to limitations of cloud cover, satellite temporal frequency and attenu-ation...
Impacts of climate changes and amplified natural disturbance on global ecosystems
Rachel A. Loehman, Megan Friggens, Rosemary L. Sherriff, Alisa R. Keyser, Karin L. Riley
2021, Book chapter, Routledge handbook of landscape ecology
Natural disturbances maintain biological diversity and landscape heterogeneity and initiate ecosystem renewal and reorganization. However, the severity, frequency, and extent of many disturbances have increased substantially in recent decades as the result of anthropogenic climate change. Disturbances can be discrete, short-duration events, such as wildfires or hurricanes, or can exert...
Phenotypic variation in Brook Trout Salvelinus fontinalis (Mitchill) at broad spatial scales makes morphology an insufficient basis for taxonomic reclassification of the species
Shannon L. White, David C. Kazyak, Richard C Harrington, Matt A. Kulp, Jacob M Rash, T. Casey Weathers, Thomas J Near
2021, Ichthyology & Herpetology (109) 743-751
It was recently proposed that there are three new species of Salvelinus with microendemic distributions in the Great Smoky Mountains National Park, Tennessee, USA. The three species of Salvelinus were hypothesized to be distinct from their congener Brook Trout S. fontinalis based on three meristic traits—pored lateral-line scales, vertebral counts, and number of basihyal teeth. After...
If you give a clam an estuary: The story of potamocorbula
Kelly H. Shrader, Emily L. Zierdt Smith, Francis Parchaso, Janet K. Thompson
2021, Frontiers for Young Minds
When you look at San Francisco Bay, what animals do you see? You may see lots of fish swimming around and birds flying above. What you DON’T see is Potamocorbula, a little clam that has had a big impact. Many years ago, ships accidentally brought Potamocorbula into the Bay. Pretty...
The structure and volume of large geysers in Yellowstone National Park, USA and the mineralogy and chemistry of their silica sinter deposits
Dakota Churchill, Michael Manga, Shaul Hurwitz, Sara Peek, David Damby, Richard Conrey, John R. Wood, R. Blaine McCleskey, William E. Keller, Behnaz Hosseini, Jefferson D.G. Hungerford
2021, Journal of Volcanology and Geothermal Research (419)
Siliceous sinter is formed by biogenic and abiogenic opal deposition around hot springs and geysers. Using Structure-from-Motion photogrammetry we generated three-dimensional models of Giant and Castle Geysers from the Upper Geyser Basin of Yellowstone National Park. We use these models to calculate...
Improvements to the Third Uniform California Earthquake Rupture Forecast ETAS Model (UCERF3‐ETAS)
Edward H. Field, Kevin R. Milner, Morgan T. Page, William H. Savran, Nicholas van der Elst
2021, The Seismic Record (1) 117-125
We describe recent improvements to the Third Uniform California Earthquake Rupture Forecast ETAS Model (UCERF3‐ETAS), which continues to represent our most advanced and complete earthquake forecast in terms of relaxing segmentation assumptions and representing multifault ruptures, elastic‐rebound effects, and spatiotemporal clustering (the latter to...
Estimating and forecasting time-varying groundwater recharge in fractured rock: A state-space formulation with preferential and diffuse flow to the water table
Allen M. Shapiro, Frederick Day-Lewis
2021, Water Resources Research (57)
Rapid infiltration following precipitation may result in groundwater contamination from surface contaminants or pathogens. In fractured rock, contaminants can migrate rapidly to points of groundwater withdrawals. In contrast to the temporal availability of groundwater quality chemical indicators, meteorological and groundwater level observations are available in real-time to estimate time-varying recharge,...
Global drivers of avian haemosporidian infections vary across zoogeographical regions
Alan Fecchio, Nicholas J. Clark, Jeffrey A Bell, Heather Skeen, Holly L Lutz, Gabriel M De La Torre, Jefferson A Vaughan, Vasyl V. Tkach, Fabio Schunck, Francisco C Ferreira, Erika M Braga, Camile Lugarini, Wanyoike Wamiti, Janice H Dispoto, Spencer C Galen, Karin Kirchgatter, M. Cecilia Sagario, Victor R Cueto, Daniel Gonzalez-Acuna, Mizue Inumaru, Yukita Sato, Yvonne R. Schumm, Petra Quillfeldt, Irene Pellegrino, Guha Dharmarajan, Pooja Gupta, V. V. Robin, Arif Ciloglu, Alparslan Yildirim, Xi Huang, Leonardo Chapa-Vargas, Paulina Alvarez-Mendizabal, Diego Santiago-Alarcon, Serguei Vyacheslavovich Drovetski, Olof Hellgren, Gary Voelker, Robert E Ricklefs, Shannon Hackett, Michael D Collins, Jason D Weckstein, Konstans Wells
Pauline Kamath, editor(s)
2021, Global Ecology and Biogeography (30) 2393-2406
Aim: Macroecological analyses provide valuable insights into factors that influence how parasites are distributed across space and among hosts. Amid large uncertainties that arise when generalizing from local and regional findings, hierarchical approaches applied to global datasets are required to determine whether drivers of parasite infection patterns vary across scales....
Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA
Andrea Faye Currylow, Michelle Collier, Emma B. Hanslowe, Bryan G. Falk, Brian S. Cade, Sarah E. Moy, Alejandro Grajal-Puche, Frank N. Ridgley, Robert Reed, Amy A. Yackel Adams
2021, Ecosphere (12) 1-18
Invasive species globally threaten biodiversity and economies, but the ecophysiological mechanisms underlying their success are often understudied. For those alien species that also exhibit high phenotypic plasticity, such as habitat generalists, adaptations in response to environmental pressures can take place relatively quickly. The Argentine giant tegu...
Hotspot dune erosion on an intermediate beach
Nicholas Cohn, Katherine Brodie, Bradley Johnson, Margaret L. Palmsten
2021, Coastal Engineering (170)
A large, low pressure Nor’easter storm and Hurricane Joaquin contributed to multiple weeks of sustained, elevated wave and water level conditions along the southeastern Atlantic coast of the United States in Fall 2015. Sea level anomalies in excess of 1 m and...
Detrital signals of coastal erosion and fluvial sediment supply during glacio-eustatic sea-level rise, Southern California, USA
Glenn R. Sharman, Jacob A Covault, Daniel F. Stockli, Zack Sickmann, Matthew A. Malkowski, Samuel Johnstone
2021, Geology (49) 1501-1505
Coastal erosion, including sea-cliff retreat, represents both an important component of some sediment budgets and a significant threat to coastal communities in the face of rising sea level. Despite the importance of predicting future rates of coastal erosion, few prehistoric constraints exist on the relative...
Advancing cave detection using terrain analysis and thermal imagery
J. Judson Wynne, Jeff Jenness, Derek Sonderegger, Timothy N. Titus, Murzy D. Jhabvala, Nathalie A. Cabrol
2021, Remote Sensing (13)
Since the initial experiments nearly 50 years ago, techniques for detecting caves using airborne and spacecraft acquired thermal imagery have improved markedly. These advances are largely due to a combination of higher instrument sensitivity, modern computing systems, and processor-intensive analytical techniques. Through applying these advancements, our goals...
Digital elevation models: Terminology and definitions
Peter L. Guth, Adriaan Van Niekerk, Carlos H. Grohmann, Jan-Peter Muller, Laurence Hawker, Igor V. Florinsky, Dean B. Gesch, Hannes I. Reuter, Virginia Herrera-Cruz, Serge Riazanoff, Carlos Lopez-Vazquez, Claudia C. Carabajal, Clement Albinet, Peter Strobl
2021, Remote Sensing (13)
Digital elevation models (DEMs) provide fundamental depictions of the three-dimensional shape of the Earth’s surface and are useful to a wide range of disciplines. Ideally, DEMs record the interface between the atmosphere and the lithosphere using a discrete two-dimensional grid, with complexities introduced by the intervening hydrosphere,...
Mapping critical minerals from the sky
Anjana K. Shah, Robert Morrow, Michael Pace, M.Scott Harris, William Doar
2021, GSA Today (31)
Critical mineral resources titanium, zirconium, and rare earth elements occur in placer deposits over vast parts of the U.S. Atlantic Coastal Plain. Key questions regarding provenance, pathways of minerals to deposit sites, and relations to geologic features remain unexplained. As part of a national effort to collect data over regions...
The application of metacommunity theory to the management of riverine ecosystems
Christopher J. Patrick, Kurt E. Anderson, Brown L. Brown, Charles P. Hawkins, Anya N. Metcalfe, Parsa Saffarinia, Tadeu Siqueira, Christopher M. Swan, Jonathan D. Tonkin, Lester L. Yuan
2021, WIREs Water (8)
River managers strive to use the best available science to sustain biodiversity and ecosystem function. To achieve this goal requires consideration of processes at different scales. Metacommunity theory describes how multiple species from different communities potentially interact with local-scale environmental drivers to influence population dynamics and community structure. However, this...
Streamflow—Water year 2020
Xiaodong Jian, David M. Wolock, Harry F. Lins, Ronald J. Henderson, Steven J. Brady
2021, Fact Sheet 2021-3046
The maps and graphs in this summary describe national streamflow conditions for water year 2020 (October 1, 2019, to September 30, 2020) in the context of streamflow ranks relative to the 91-year period of water years 1930–2020. Annual runoff in the Nation’s rivers and streams during water year 2020 (11.10...
A machine learning approach to modeling streamflow with sparse data in ungaged watersheds on the Wyoming Range, Wyoming, 2012–17
Ryan R. McShane, Cheryl A. Eddy-Miller
2021, Scientific Investigations Report 2021-5093
Scant availability of streamflow data can impede the utility of streamflow as a variable in ecological models of aquatic and terrestrial species, especially when studying small streams in watersheds that lack streamgages. Streamflow data at fine resolution and broad extent were needed by collaborators for ecological research on small streams...
