Tidal wetland gross primary production across the continental United States, 2000–2019
R.A. Feagin, I. Forbrich, T. P. Huff, J.G. Barr, J. Ruiz-Plancarte, J.D. Fuentes, R.G. Najjar, R. Vargas, A. Vazquez Lule, L. Windham-Myers, Kevin D. Kroeger, E. J. Ward, G. W. Moore, M. Leclerc, K. W. Krauss, C.L. Stagg, M. Alber, S. H. Knox, K. V. R. Schafer, T.S. Bianchi, J. A. Hutchings, H. Nahrawi, A. Noormets, B. Mitra, A. Jaimes, A.L. Hinson, Brian A. Bergamaschi, J.S. King, G. Miao
2020, Global Biogeochemical Cycles (34)
We mapped tidal wetland gross primary production (GPP) with unprecedented detail for multiple wetland types across the continental United States (CONUS) at 16‐day intervals for the years 2000–2019. To accomplish this task, we developed the spatially explicit Blue Carbon (BC) model, which combined tidal wetland cover and field‐based eddy covariance...
Natural gas hydrates: Status of potential as an energy resource
Ray Boswell, Steve Hancock, Koji Yamamoto, Timothy Collett, Mahendra Pratap, Sung-Rock Lee
2020, Book chapter, Future energy
Gas hydrate is a widespread naturally-occurring combination of water and natural gases. Gas hydrate is found in shallow sediments of deepwater regions of the continental margins and in areas of continuous permafrost. Where gas supply is sufficient and migration pathways connect gas sources to favorable reservoirs, gas hydrate...
Water tracks enhance water flow above permafrost in upland Arctic Alaska hillslopes
Sarah G. Evans, Sarah E Godsey, Caitlin R Rushlow, Clifford I. Voss
2020, Journal of Geophysical Research F: Earth Surface (125)
Upland permafrost regions occupy approximately one third of the Arctic landscape. In upland regions, hydrologic fluxes are influenced by water tracks, curvilinear features on hillslopes that preferentially fill with and route water in response to snowmelt and rainfall when the soil above continuous permafrost thaws in the summer. As continued...
Evaluating contributions of recent tracking-based animal movement ecology to conservation management
Todd E. Katzner, Raphael Arlettaz
2020, Frontiers in Ecology and Evolution (7)
The use of animal-born sensors for location-based tracking and bio-logging in terrestrial systems has expanded dramatically in the past 10 years. This rapid expansion has generated new data on how animals interact with and respond to variation in their environment, resulting in important ecological, physiological, and evolutionary insights. Although...
The clock keeps ticking: Circadian rhythms of free-ranging polar bears
Jasmine V. Ware, Karyn D. Rode, Charles T. Robbins, T. Leise, C.R. Weil, Heiko T. Jansen
2020, Journal of Biological Rhythms (35) 180-194
Life in the Arctic presents organisms with multiple challenges, including extreme photic conditions, cold temperatures, and annual loss and daily movement of sea ice. Polar bears (Ursus maritimus) evolved under these unique conditions, where they rely on ice to hunt their main prey, seals. However, very little is known about...
Soil shear strength losses in two fresh marshes with variable increases in N and P loading
R. Eugene Turner, Christopher M. Swarzenski, James E. Bodker
2020, Wetlands (40) 1189-1199
We measured soil shear strength (SSS) from 2009 to 2018 in two hydrologically distinct freshwater marshes dominated by Panicum hemitomon after nitrogen (N) and phosphorous (P) were applied to the surface in spring. The average SSS averaged over 100 cm depth in the floating and anchored marshes declined up to...
Dilution and propagation of provenance trends in sand and mud: Geochemistry and detrital zircon geochronology of modern sediment from central California (U.S.A.)
Matthew A. Malkowski, Glenn R. Sharman, Samuel Johnstone, Marty J. Grove, Dave L. Kimbrough, Stephen A. Graham
2020, American Journal of Science (319) 846-902
Integrated, multi-method provenance studies of siliciclastic sedimentary deposits are increasingly used to reconstruct the history of source-to-sink transport, paleogeography, and tectonics. Invariably, analysis of large-scale depositional systems must confront issues regarding how to best sample the system and adequately cope with the details of sediment mixing. Potential biases including...
Binning singletons: Mentoring through networking at ASM microbe 2019
Joseph B. James, Amanda L. Gunn, Denise M. Akob
2020, mSphere
The American Society for Microbiology (ASM) national conference, Microbe, is the flagship meeting for microbiologists across the globe. The presence of roughly 10,000 attendees provides enormous opportunities for networking and learning. However, such a large meeting can be intimidating to many, especially early career scientists, students, those attending alone, and...
Website usability differences between males and females: An eye-tracking evaluation of a climate decision support system
Lindsay C. Mauldin, Karen McNeal, Heather D Aldridge, Corey Davis, Ryan Boyles, Rachel M. Atkins
2020, Weather, Climate, and Society (12) 183-192
Decision support systems, which are collections of related information located in a central place, can be used as platforms from which climate information can be shared with decision-makers. In this study, a web-based climate decision support system (DSS) for foresters in the Southeast United States was evaluated using eye-tracking technology....
The historical context of contemporary climatic adaptation: A case study in the climatically dynamic and environmentally complex southwestern United States
Robert Massatti, L. Lacey Knowles
2020, Ecography (43) 735-746
The process of adaptation can be highly dependent upon historical and contemporary factors, especially in environmentally and topographically complex regions affected by Pleistocene glaciations. Here, we investigate Hilaria jamesii (Poaceae), a dryland C4 graminoid, to test how patterns of adaptive genetic variation are linked to its glacial and post‐glacial history. We show that...
Final Alabama Barrier Island restoration assessment report, appendix A: Data management plan
Christina B. Hunnicutt, Craig Conzelmann
2020, Report
The Alabama Barrier Island Restoration Assessment project focused exclusively on Dauphin Island, a significant barrier island along the northern Gulf of Mexico. This restoration feasibility study effort required data collection and analysis of many data types (e.g., hydro, sediment, currents, etc.) through the project’s life cycle to assess restoration measures...
Assessment of undiscovered oil and gas resources in the Central North Slope of Alaska, 2020
David W. Houseknecht, Katherine J. Whidden, Christopher D. Connors, Richard O. Lease, Christopher J. Schenk, Tracey J. Mercier, William A. Rouse, Palma J. Botterell, Rebecca A. Smith, Margaret M. Sanders, William H. Craddock, Christina A. DeVera, Christopher P. Garrity, Marc L. Buursink, C. Ozgen Karacan, Samuel J. Heller, Thomas E. Moore, Julie A. Dumoulin, Marilyn E. Tennyson, Katherine L. French, Cheryl A. Woodall, Ronald M. Drake II, Kristen R. Marra, Thomas M. Finn, Scott A. Kinney, Chilisa M. Shorten
2020, Fact Sheet 2020-3001
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 3.6 billion barrels of oil and 8.9 trillion cubic feet of natural gas (associated and nonassociated) in conventional accumulations in Mississippian through Paleogene strata in the central North Slope of Alaska....
Molecular sequencing and morphological identification reveal similar patterns in native bee communities across public and private grasslands of eastern North Dakota
Brian Darby, Russ Bryant, Abby Keller, Madison Jochim, Josephine Moe, Zoe Schreiner, Carrie Pratt, Ned Euliss, Mia Park, Rebecca Simmons, Clint Otto
2020, PLoS ONE (15)
Bees play a key role in the functioning of human-modified and natural ecosystems by pollinating agricultural crops and wild plant communities. Global pollinator conservation efforts need large-scale and long-term monitoring to detect changes in species’ demographic patterns and shifts in bee community structure. The objective of this project was to...
Pallid sturgeon seasonal habitat selection in a large free-flowing river, the lower Mississippi River
P. T. Kroboth, D. A. Hann, M. E. Colvin, P. D. Hartfield, H. L. Schramm
2020, Journal of Applied Ichthyology (36) 131-141
Pallid sturgeon Scaphirhynchus albus (Forbes & Richardson, 1905, Bulletin of the Illinois State Laboratory of Natural History, 1905, 7, 37) are an endangered riverine sturgeon native to the Mississippi and Missouri rivers, and declining numbers have been attributed to multiple stressors, including habitat loss and alteration. The lower Mississippi River provides a...
Response to terrestrial nest predators among endemic and introduced Hawaiian birds
George C Cummins, Tad C Theimer, Eben H. Paxton
2020, Ecology and Evolution (10) 1949-1958
Birds free from nest predators for long periods may either lose the ability to recognize and respond to predators or retain antipredator responses if they are not too costly. How these alternate scenarios play out has rarely been investigated in an avian community whose members have different evolutionary histories. We...
Effects of John Martin Reservoir on water quality and quantity: Assessment by chemical, isotopic, and mass-balance methods
Carleton R. Bern, Michael J. Holmberg, Zachary D. Kisfalusi
2020, Journal of Hydrology X (7) 100051
Water quality and quantity can be influenced by transit through and storage in reservoirs. Assessing such effects can be challenging, however, because of mixing and residence times, and inter-annual net storage and release from both the reservoir itself and surrounding porosity. Here, different methodologies were used to assess the effect...
Behavioral responses of sea lamprey to varying application rates of a synthesized pheromone in diverse trapping scenarios
Nicholas S. Johnson, Sean A. Lewandoski, Bethany Alger, Lisa M. O’Connor, Gale Bravener, Peter J. Hrodey, Belinda Huerta, Jessica Barber, Weiming Li, C. Michael Wagner, Michael J Siefkes
2020, Journal of Chemical Ecology (46) 233-249
Use of the first fish pheromone biopesticide, 3-keto petromyzonol sulfate (3kPZS) in sea lamprey (Petromyzon marinus) control requires an understanding of both how the amount 3kPZS applied to a trap relates to catch, and how that relationship varies among stream types. By conducting 3kPZS dose-response experiments over two years and...
Seafloor change around the Mississippi barrier islands, 1920 to 2016—The influence of storm effects on inlet and island morphodynamics
James Flocks, Noreen A. Buster, Owen T. Brenner
2020, Open-File Report 2019-1140
The Mississippi Barrier Islands in the northern Gulf of Mexico experienced high rates of spatial change over recorded history. Wave-induced sediment transport induced island migration, landward retreat, and inlet evolution. These processes can be measured using repeat bathymetric surveys to analyze elevation change over time. This study analyzes digital elevation...
Non-crop habitat use by wild bees (Hymenoptera: Apoidea) in a mixed-use agricultural landscape
Brianne Du Clos, Cyndy Loftin, Francis A. Drummond
2020, Environmental Entomology (49) 502-515
Homogeneous, agriculturally intense landscapes have abundant records of pollinator community research, though similar studies in the forest-dominated, heterogeneous mixed-use landscape that dominates the northeastern United States are sparse. Trends of landscape effects on wild bees are consistent across homogeneous agricultural landscapes, whereas reported studies in the northeastern United States...
Hawaii as a microcosm: Advancing the science and practice of managing introduced and invasive species
Liba Pejchar, Christopher A. Lepczyk, Jean E Fantle-Lepczyk, Steve C. Hess, M. Tracy Johnson, Christina Leopold, Michael P. Marchetti, Katherine M McClure, Aaron B Sheils
2020, BioScience (70) 184-193
Invasive species are a leading driver of global change, with consequences for biodiversity and society. Because of extraordinary rates of endemism, introduction, and extinction, Hawaii offers a rich platform for exploring the cross-disciplinary challenges of managing invasive species in a dynamic world. We highlight key successes and shortcomings to share...
Tree mortality in blue oak woodland during extreme drought in Sequoia National Park, California
Adrian J. Das, Nicholas J. Ampersee, Anne Hopkins Pfaff, Nathan L. Stephenson, Tedmund J Swiecki, Elizabeth A Bernhardt, Patricia Haggerty, Koren R. Nydick
2020, Madroño (66) 164-175
Blue oak woodlands in California have been a focus of conservation concern for many years. Numerous studies have found that existing seedling and sapling numbers are inadequate to sustain current populations, and recent work has suggested that blue oak woodlands might be particularly vulnerable to a warming climate. California has...
Evaluation of hydrologic impact of an irrigation curtailment program in the Upper Klamath Lake Basin using Landsat satellite data
Naga Manohar Velpuri, Gabriel Senay, Matthew Schauer, C. Amanda Garcia, Ramesh Singh, MacKenzie Friedrichs, Stefanie Bohms, Jonathan V. Haynes, Terrence D. Conlon
2020, Hydrological Processes (34) 1697-1713
Upper Klamath Lake (UKL) is the source of the Klamath river that flows through southern Oregon and northern California. The UKL basin is home to two endangered species and provides water for 81,000+ ha (200,000+ acres) of irrigation on the United States Bureau of Reclamation (USBR) Klamath Project located downstream...
A high-resolution seismic catalog for the initial 2019 Ridgecrest Earthquake sequence: Foreshocks, aftershocks, and faulting complexity
David R. Shelly
2020, Seismological Research Letters (91) 1971-1978
I use template matching and precise relative relocation techniques to develop a high-resolution earthquake catalog for the initial portion of the 2019 Ridgecrest earthquake sequence, from July 4-16, encompassing the foreshock sequence and the first 10+ days of aftershocks following the Mw 7.1 mainshock. Using 13,525 routinely cataloged events as...
Revision of Boore (2018) Ground‐motion predictions for Central and Eastern North America: Path and offset adjustments and extension to 200 m/s <= Vs30 <= 3000 m/s
David Boore
2020, Seismological Research Letters (91) 977-991
The three sets of ground‐motion predictions (GMPs) of Boore (2018; hereafter, B18) are compared with a much larger dataset than was used in deriving the predictions. The B18 GMPs work well for response spectra at periods between ∼0.15"><span id="MathJax-Span-39"...
Caltech/USGS Southern California Seismic Network (SCSN) and Southern California Earthquake Data Center (SCEDC): Data availability for the 2019 Ridgecrest sequence
Egill Hauksson, Clara Yoon, Ellen Yu, Jennifer Andrews, Mark Alvarez, Rayo Bhadha, Valerie Thomas
2020, Seismological Research Letters (91) 1961-1970
The 2019 M6.4 and M7.1 Ridgecrest earthquake sequence occurred in the eastern California shear zone (ECSZ). The mainshock ruptured the Little Lake fault zone and aftershocks extended from the Garlock fault in the south, to the southern end of the 1872 M7.5 Owens Valley earthquake rupture in the north. We present data from...
