Gap-filling eddy covariance methane fluxes: Comparison of machine learning model predictions and uncertainties at FLUXNET-CH4 wetlands
Jeremy Irvin, Sharon Zhou, Gavin McNicol, Fred Lu, Vincent Liu, Etienne Fluet-Chouinard, Zutao Ouyang, Sara Helen Knox, Antje Lucas-Moffat, Carlo Trotta, Dario Papale, Domenico Vitale, Ivan Mammarella, Pavel Alekseychik, Mika Aurela, Anand Avati, Dennis Baldocchi, Sheel Bansal, Gil Bohrer, David I. Campbell, Jiquan Chen, Housen Chu, Higo J. Dalmagro, Kyle B. Delwiche, Ankur R. Desai, Eugenie S. Euskirchen, Sarah Feron, Mathias Goeckede, Martin Heimann, Manuel Helbig, Carole Helfter, Kyle S. Hemes, Takashi Hirano, Hiroki Iwata, Gerald Jurasinski, Aram Kalhori, Andrew Kondrich, Derrick Y. F. Lai, Annalea Lohila, Avni Malholtra, Lutz Merbold, Bhaskar Mitra, Andrew Ng, Mats B. Nilsson, Asko Noormets, Matthias Peichl, A. Camilo Rey-Sanchez, Andrew D. Richardson, Benjamin R. K. Runkle, Karina V. R. Schafer, Oliver Sonnentag, Ellen Stuart-Haëntjens, Cove Sturtevant, Masahito Ueyama, Alex C. Valach, Rodrigo Vargas, George L. Vourlitis, Eric Ward, Guan Xhuan Wong, Donatella Zona, Ma. Carmelita R. Alberto, David P. Billesbach, Gerardo Celis, Han Dolman, Thomas Friborg, Kathrin Fuchs, Sebastien Gogo, Mangaliso J. Gondwe, Jordan P. Goodrich, Pia Gottschalk, Lukas Hortnagl, Adrien Jacotot, Franziska Koebsch, Kuno Kasak, Regine Maier, Timothy H. Morin, Eiko Nemitz, Walter C. Oechel, Patricia Y. Oikawa, Keisuke Ono, Torsten Sachs, Ayaka Sakabe, Edward A. Schuur, Robert Shortt, Ryan C. Sullivan, Daphne J. Szutu, Eeva-Stiina Tuittila, Andrej Varlagin, Joseph G. Verfaillie, Christian Wille, Lisamarie Windham-Myers, Benjamin Poulter, Robert B. Jackson
2021, Agricultural and Forest Meteorology (308–309)
Time series of wetland methane fluxes measured by eddy covariance require gap-filling to estimate daily, seasonal, and annual emissions. Gap-filling methane fluxes is challenging because of high variability and complex responses to multiple drivers. To date, there is no widely established gap-filling standard for wetland methane fluxes, with regards both...
The Miocene stratigraphy of the Laberinto area (Río Ica Valley) and its bearing on the geological history of the East Pisco Basin (south-central Peru)
Thomas J. Devries, John A. Barron, Mario Urbina-Schmitt, Diana Ochoa, Raul Esperante, Lawrence W. Snee
2021, South American Journal of Earth Sciences (111)
Global sea-level changes and substantial vertical displacement along the Monte Grande Fault (MGF) in the lower Río Ica Valley of south-central Peru influenced the accumulation of bioclast-bearing and diatom-bearing Miocene siliciclastic sediments in an area of the East Pisco forearc basin (EPB) colloquially known as Laberinto. Two depositional hiatuses in...
Genetic structure and diversity of the mustard hill coral Porites astreoides along the Florida Keys reef tract
Dominique N. Gallery, Michelle L. Green, Ilsa B. Kuffner, Elizabeth A. Lenz, Lauren Toth
2021, Marine Biodiversity Records (51)
Increases in local and global stressors have led to major declines in coral populations throughout the western Atlantic. While abundances of other species have declined, however, the relative abundance of the mustard hill coral, Porites astreoides, has increased. Porites astreoides is relatively resilient to some stressors, and because of its mixed reproductive strategies,...
Instruments, methods, rationale, and derived data used to quantify and compare the trapping efficiencies of four types of pressure-difference bedload samplers
John R. Gray, Gregory E. Schwarz, David J. Dean, Jonathan A. Czuba, Joel T. Groten
2021, Open-File Report 2021-1064
Bedload and ancillary data were collected to calculate and compare the bedload trapping efficiencies of four types of pressure-difference bedload samplers as part of episodic, sediment-recirculating flume experiments at the St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, in January–March 2006. The bedload-sampler experiments, which were conceived, organized, and led...
BERM: A Belowground Ecosystem Resiliency Model for estimating Spartina alterniflora belowground biomass
Jessica L. O'Connell, Deepak Mishra, Merryl Alber, Kristin B. Byrd
2021, New Phytologist (232) 425-439
SummarySpatiotemporal patterns of Spartina alterniflora belowground biomass (BGB) are important for evaluating salt marsh resiliency. To solve this, we created the BERM (Belowground Ecosystem Resiliency Model), which estimates monthly BGB (30-m spatial resolution) from freely available data such as Landsat-8 and Daymet climate summaries.Our...
Occurrence and distribution of mercury in streams and reservoirs in the Triangle Area of North Carolina, July 2007–June 2009
Anna M. McKee, Sharon Fitzgerald, Mary J. Giorgino
2021, Scientific Investigations Report 2021-5027
During the time period 2001–2006, the U.S. Geological Survey reported mercury-concentration measurements that exceeded the North Carolina water-quality criterion (NCWQC) of 0.012 microgram per liter for total recoverable mercury in streams and reservoirs across the Triangle Area of North Carolina. Mercury data were sparse, however, generally consisting of only one...
Forecasting the distribution of a range-expanding bat reveals future response to climate change and habitat
Michael C. True, Roger W. Perry, W. Mark Ford
2021, Acta Chiropterologica (23) 139-152
Many terrestrial vertebrate species are exhibiting geographic distribution changes including poleward range limit shifts in response to increases in regional temperature. Bats are a highly mobile taxa capable of rapid responses to changes in abiotic or biotic conditions. In North America, recent extralimital records of the non-hibernating Lasiurus seminolus (Seminole...
A comparative baseline of coral disease in three regions along the Saudi Arabian coast of the central Red Sea
Greta S. Aeby, Amanda Shore, Thor Jensen, Maren Ziegler, Thierry M. Work, Christian Voolstra
2021, PLoS ONE (16)
Coral disease is a growing problem for coral reefs globally and diseases have been linked to thermal stress, excess nutrients, overfishing and other human impacts. The Red Sea is a unique environment for corals with a strong environmental gradient characterized by temperature extremes and high salinities,...
Earlier winter/spring runoff and snowmelt during warmer winters lead to lower summer chlorophyll-a in north temperate lakes
Allison R. Hrycik, Peter D. F. Isles, Rita Adrian, Matthew Albright, Linda C. Bacon, Stella A. Berger, Ruchi Bhattacharya, Hans-Peter Grossart, Josef Hejzlar, Amy L. Hetherington, Lesley B. Knoll, Alo Laas, Cory P. McDonald, Kellie Merrell, Jens C. Nejstgaard, Kirsten Nelson, Peeter Noges, Andrew M. Paterson, Rachel M. Pilla, Dale M. Robertson, Lars G. Rudstam, James A. Rusak, Steven Sadro, Eugene A. Silow, Jason D. Stockwell, Huaxia Yao, Kiyoko Yokota, Donald C. Pierson
2021, Global Change Biology (27) 4615-4629
Winter conditions, such as ice cover and snow accumulation, are changing rapidly at northern latitudes and can have important implications for lake processes. For example, snowmelt in the watershed—a defining feature of lake hydrology because it delivers a large portion of annual nutrient inputs—is becoming earlier. Consequently, earlier and a...
Hydraulic modeling at selected dam-removal and culvert-retrofit sites in the northeastern United States
Scott A. Olson, Caelan E. Simeone
2021, Scientific Investigations Report 2021-5056
Aquatic connectivity projects, such as removing dams and modifying culverts, have substantial benefits. The restoration of natural flow conditions improves water quality, sediment transport, aquatic and riparian habitat, and fish passage. These projects can also decrease hazards faced by communities by lowering water-surface elevations of flood waters and by removing...
Assessment of undiscovered conventional oil and gas resources in the eastern Mediterranean area, 2020
Christopher J. Schenk, Tracey J. Mercier, Thomas M. Finn, Cheryl A. Woodall, Kristen R. Marra, Heidi M. Leathers-Miller, Phuong A. Le, Ronald M. Drake II
2021, Fact Sheet 2021-3032
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 879 million barrels of conventional oil and 286.2 trillion cubic feet of conventional gas in the eastern Mediterranean area....
Preliminary assessment of the wave generating potential from landslides at Barry Arm, Prince William Sound, Alaska
Katherine R. Barnhart, Ryan P. Jones, David L. George, Jeffrey A. Coe, Dennis M. Staley
2021, Open-File Report 2021-1071
We simulated the concurrent rapid motion of landslides on an unstable slope at Barry Arm, Alaska. Movement of landslides into the adjacent fjord displaced fjord water and generated a tsunami, which propagated out of Barry Arm. Rather than assuming an initial sea surface height, velocity, and location for the tsunami,...
Who’s your daddy? On the identity and distribution of the paternal hybrid ancestor of the parthenogenetic gecko Lepidodactylus lugubris (Reptilia: Squamata: Gekkonidae)
Benjamin R. Karin, Paul M. Oliver, Alexander L. Stubbs, Umilaela Afirin, Djoko T. Iskandar, Evy Arida, Zheng Oong, Jimmy A. McGuire, Frederick Kraus, Matthew K. Fujita, Ivan Ineich, Hidetoshi Ota, Stacie A. Hathaway, Robert N. Fisher
2021, Zootaxa (4999) 87-100
The widespread parthenogenetic gecko Lepidodactylus lugubris is comprised of several clonal lineages, at least one of which has been known for some time to have originated from hybridization between its maternal ancestor, Lepidodactylus moestus, and a putatively undescribed paternal ancestor previously known only from remote islands in the Central Pacific. By integrating new...
Potential effect of low-rise, downcast artificial lights on nocturnally migrating land birds
Sergio A. Cabrera-Cruz, Ronald P. Larkin, Maren E. Gimpel, James G. Gruber, Theodore J. Zenzal Jr., Jeffrey J. Buler
2021, Integrative and Comparative Biology (61) 1216-1236
Artificial light at night (ALAN) on tall or upward-pointed lighting installations affects the flight behavior of night-migrating birds. We hypothesized that common low-rise lights pointing downward also affect the movement of nocturnal migrants. We predicted that birds in flight will react close to low-rise lights, and be attracted and grounded...
Managing for RADical ecosystem change: Applying the Resist-Accept-Direct (RAD) framework
Abigail J. Lynch, Laura Thompson, Erik A. Beever, Augustin C. Engman, Cat Hawkins Hoffman, Stephen T. Jackson, Trevor J. Krabbenhoft, David J Lawrence, Douglas Limpinsel, Robert T. Magill, Tracy Melvin, John M. Morton, Robert Newman, Jay Peterson, Mark T. Porath, Frank J. Rahel, Gregor Schuurman, Suresh Sethi, Jennifer L. Wilkening
2021, Frontiers in Ecology and the Environment (19) 461-469
Ecosystem transformation involves the emergence of persistent ecological or social–ecological systems that diverge, dramatically and irreversibly, from prior ecosystem structure and function. Such transformations are occurring at increasing rates across the planet in response to changes in climate, land use, and other factors. Consequently, a dynamic...
Distilling professional opinion to gauge vulnerability of Guam avifauna to Brown Treesnake predation
Robert McElderry, Eben H. Paxton, An Nguyen, Shane R. Siers
2021, Frontiers in Conservation Science (2)
The avifauna of Guam was devastated by the introduction of the Brown Treesnake, and the restoration of native birds would need to address the problem with eradication or suppression of BTS. With eradication of the snake unlikely in the near term, and suppression capabilities limited to specific finite areas,...
Genetic diversity is considered important but interpreted narrowly in country reports to the Convention on Biological Diversity: Current actions and indicators are insufficient
Sean M. Hoban, Catriona D. Campbell, Jessica M. da Silva, Robert Ekblom, W. Chris Funk, Brittany A. Garner, Jose A. Godoy, Francine Kershaw, Anna J. MacDonald, Joachim Mergeay, Melissa Minter, David O'Brien, Ivan Paz Vinas, Sarah K. Pearson, Silvia Perez-Espona, Kevin M. Potter, Isa-Rita M. Russo, Gernot Segelbacher, Cristiano Vernesi, Margaret Hunter
2021, Biological Conservation (261)
International agreements such as the Convention on Biological Diversity (CBD) have committed to conserve, and sustainably and equitably use, biodiversity. The CBD is a vital instrument for global conservation because it guides 195 countries and the European Union in setting priorities...
Investigation of scale-dependent groundwater/surface-water exchange in rivers by gradient self-potential logging: Numerical modeling and field experiments
Scott Ikard, Martin A. Briggs, John W. Lane
2021, Journal of Environmental and Engineering Geophysics (26)
Exchanges of groundwater and surface-water are fundamental to a wide range of water-supply and water-quality management issues but challenging to map beyond the reach scale. Waterborne gradient self-potential (SP) measurements are directly sensitive to water flow through riverbed sediments and can be used to infer exchange locations, direction (gain versus...
Distributed memory parallel groundwater modeling for the Netherlands Hydrological Instrument
Jarno Verkaik, Joseph D. Hughes, van Walsum, G.H.P. Oude Essink, H.X. Lin, M.F.P. Bierkens
2021, Environmental Software & Modelling (143)
Worldwide, billions of people rely on fresh groundwater reserves for their domestic, agricultural and industrial water use. Extreme droughts and excessive groundwater pumping put pressure on water authorities in maintaining sustainable water usage. High-resolution integrated models are valuable assets in supporting them. The Netherlands Hydrological Instrument (NHI) provides the Dutch...
Factors influencing distributional shifts and abundance at the range core of a climate-sensitive mammal
Peter D Billman, Erik A. Beever, Dave B. McWethy, Lindsey Thurman, Kenny C Wilson
2021, Global Change Biology (27) 4498-4515
Species are frequently responding to contemporary climate change by shifting to higher elevations and poleward to track suitable climate space. However, depending on local conditions and species’ sensitivity, the nature of these shifts can be highly variable and difficult to predict. Here, we examine how the...
Robust earthquake early warning at a fraction of the cost: ASTUTI Costa Rica
Benjamin A. Brooks, Marino Protti, Todd Ericksen, Julian Bunn, Floribeth Vega, Elizabeth S. Cochran, Chris Duncan, Jonathan Avery, Sarah E. Minson, Esteban J. Chaves, Juan Carlos Baez, James H. Foster, Craig L. Glennie
2021, AGU Advances (2)
We show that a fixed smartphone network can provide robust Earthquake Early Warning for at least two orders of magnitude less cost than scientific-grade networks. Our software and cloud-based data architecture that we have constructed for the Alerta Sismica Temprana Utilizando Teléfonos Inteligentes (ASTUTI; Earthquake Early Warning Utilizing Smartphones) network...
Juvenile moose stress and nutrition dynamics related to winter ticks, landscape characteristics, climate-mediated factors and survival
Elias Rosenblatt, Jacob Debow, Joshua Blouin, Therese M. Donovan, James Murdoch, Scott Creel, Will Rogers, Katherina Gieder, Nick Fortin, Cedric Alexander
2021, Conservation Physiology (9)
Moose populations in the northeastern United States have declined over the past 15 years, primarily due to the impacts of winter ticks. Research efforts have focused on the effects of winter tick infestation on moose survival and reproduction, but stress and nutritional responses to ticks and other stressors remain understudied. We...
Detrital zircon record of magmatism and sediment dispersal across the North American Cordilleran arc system (28-48°N)
Theresa Maude Schwartz, Kathleen D. Surpless, Joseph P. Colgan, Samuel Johnstone, Christopher S. Holm-Denoma
2021, Earth-Science Reviews (220)
As zircon U-Pb geochronology has become a leading method in sediment provenance studies and basin analysis over the past 20 years, the volume of detrital zircon data made available in published literature has enabled researchers to go beyond source-to-sink provenance studies to explore increasingly complex geologic problems. In this review, we utilize the growing body of...
Wastewater disposal has not significantly altered the regional stress state in southern Kansas
Robert Skoumal, Elizabeth S. Cochran
2021, Seismological Research Letters (6) 3516-3525
Wastewater disposal is primarily responsible for the increased seismicity rate since ~2013 in southern Kansas. Previous work that used shear wave splitting (SWS) in southern Kansas interpreted a ~90º temporal rotation in the fast polarization direction and attributed it to increased pore pressures resulting from fluid injection. However, this interpreted...
Blue waters, green bottoms: Benthic filamentous algal blooms are an emerging threat to clear lakes worldwide
Yvonne Vadeboncoeur, Marianne V. Moore, Simon D. Stewart, Sudeep Chandra, Karen Atkins, Jill S. Baron, Keith Bouma-Gregson, Soren Brothers, Stephen Francoeur, Laurel Genzoli, Scott N. Higgins, Sabine Hilt, Leon R. Katona, David Kelly, Isabella Oleksy, Ted Ozersky, Mary Powel, Derek Roberts, Oleg Timoshkin, Flavia Tromboni, M. Jake Vander Zanden, Ekaterina Volkova, Sean Waters, Susanna A. Wood, Masumi Yamamuro
2021, BioScience (71) 1011-1027
Nearshore (littoral) habitats of clear lakes with high water quality are increasingly experiencing unexplained proliferations of filamentous algae that grow on submerged surfaces. These filamentous algal blooms (FABs) are sometimes associated with nutrient pollution in groundwater, but complex changes in climate, nutrient transport, lake hydrodynamics, and food web structure...
