Characterizing benthic macroinvertebrate and algal biological condition gradient models for California wadeable Streams, USA
Michael J. Paul, Ben Jessup, Larry R. Brown, James Carter, Marco Cantonati, Donald F. Charles, Jeroen Gerritsen, Dave Herbst, Rosalina Stancheva, Jeanette K. Howard, Bill Isham, Rex Lowe, Raphael D Mazor, Patina K. Mendez, Peter R Ode, Alison O’Dowd, Yangdong Pan, Andrew C. Rehn, Sarah A. Spaulding, Martha Sutula, Susanna Theroux
2020, Ecological Indicators (117)
The Biological Condition Gradient (BCG) is a conceptual model that describes changes in aquatic communities under increasing levels of anthropogenic stress. The BCG helps decision-makers connect narrative water quality goals (e.g., maintenance of natural structure and function) to quantitative measures of...
Combining ash analyses with remote sensing to identify juvenile magma involvement and fragmentation mechanisms during the 2018/19 small eruption of Peteroa volcano (Southern Andes)
Jorge E Romero, Felipe Aguilera, Francisco Delgado, Danny Guzman, Alexa R. Van Eaton, Nicolas Luengo, Javiera Caro, Jorge Bustillos, Alicia Guevara, Sven Holbik, Daniel Tormey, Iver Zegarra
2020, Journal of Volcanology and Geothermal Research (405)
The Planchón Peteroa Volcanic Complex (PPVC) is located on the border of Chile and Argentina, and is one of the most active volcanic systems in the Andes. Holocene activity has included magma-water interaction with an evolving series of crater lakes, mainly...
Development of a new open-source tool to map burned area and burn severity
Joshua J. Picotte
2020, Conference Paper, Proceedings of the fire continuum- Preparing for the future of wildland fire
Accurate and complete geospatial fire occurrence records are important in determining postfire effects, emissions, hazards, and fuel loading inventories. Currently, the Monitoring Trends in Burn Severity (MTBS) project maps the fire perimeter and burn severity of all large fires on public lands. Although the MTBS project maps a large proportion...
The potential of using dynamic strains in earthquake early warning applications
Noha Sameh Ahmed Farghal, Andrew J Barbour, John Langbein
2020, Seismological Research Letters (91) 2817-2827
We investigate the potential of using borehole strainmeter data from the Network of the Americas (NOTA) and the U.S. Geological Survey networks to estimate earthquake moment magnitudes for earthquake early warning (EEW) applications. We derive an empirical equation relating peak dynamic strain, earthquake moment magnitude, and hypocentral distance, and investigate...
Living on the edge: Multi-scale analyses of bird habitat use in coastal marshes of Barataria Basin, Louisiana, USA
Brett Patton, J. A. Nyman, Megan K. La Peyre
2020, Wetlands (40) 2041-2054
Coastal marsh loss, combined with expected sea-level rise, will cause inundation and extensive shifts to vegetation and salinity regimes that may affect the bird species dependent on coastal ecosystems worldwide. Within coastal marsh habitats, birds provide key targets for coastal management goals. However, limited information on bird-habitat relationships within coastal...
Regionally continuous Miocene rhyolites beneath the eastern Snake River Plain reveal localized flexure at its western margin: Idaho National Laboratory and vicinity
Kyle L. Schusler, David M. Pearson, Michael J. McCurry, Roy C. Bartholomay, Mark H. Anders
2020, The Mountain Geologist (57) 241-270
The eastern Snake River Plain (ESRP) is a northeast-trending topographic basin interpreted to be the result of the time-transgressive track of the North American plate above the Yellowstone hotspot. The track is defined by the age progression of silicic volcanic rocks exposed along the margins of the ESRP. However, the...
Wildfire-driven forest conversion in western North American landscapes
Jonathan D. Coop, Sean A. Parks, Camile S Stevens-Rumann, Shelley D. Crausbay, Philip E. Higuera, Matthew D. Hurteau, Alan J. Tepley, Ellen Whitman, Timothy J Assal, Brandon M. Collins, Kimberley T Davis, Solomon Dobrowski, Donald A. Falk, Paula J. Fornwalt, Peter Z Fule, Brian J. Harvey, Van R. Kane, Caitlin E. Littlefield, Ellis Margolis, Malcolm North, Marc-André Parisien, Susan Prichard, Kyle C. Rodman
2020, BioScience (70) 659-673
Changing disturbance regimes and climate can overcome forest ecosystem resilience. Following high-severity fire, forest recovery may be compromised by lack of tree seed sources, warmer and drier postfire climate, or short-interval reburning. A potential outcome of the loss of resilience is the conversion of the prefire forest to a different...
A summary of water-quality monitoring in San Francisco Bay in water year 2017
Daniel N. Livsey, Maureen A. Downing-Kunz
2020, Scientific Investigations Report 2020-5064
This report summarizes the activities of the U.S. Geological Survey (USGS) San Francisco Bay Water-Quality Monitoring and Sediment Transport Project during water year 2017, including an explanation of methods employed, stations operated, and a graphical summary of data for the period of record for stations operational in water year 2017....
Imprint of regional oceanography on foraminifera of eastern Pacific Coral Reefs
Angelica Maria Zamora-Duran, Richard B. Aronson, James J. Leichter, Jennifer A. Flannery, Julie N. Richey, Lauren Toth
2020, Journal of Foraminiferal Research (3) 279-290
The marginal marine environments of the eastern tropical Pacific (ETP) serve as an ideal natural laboratory to study how oceanographic and climatic variability influence coral-reef ecosystems. Reefs along the Pacific coast of Panamá span a natural gradient of nutrients, pH, and temperature as a result...
Elevation-derived hydrography acquisition specifications
Silvia Terziotti, Christy-Ann Archuleta
2020, Techniques and Methods 11-B11
Hydrographic features derived from U.S. Geological Survey (USGS) 3D Elevation Program data, and collected for use by the USGS, must meet the specifications described in this document. The specifications described herein pertain to the final product delivered to the USGS, not to methods used to derive the hydrographic features. The...
Elevation-derived hydrography—Representation, extraction, attribution, and delineation rules
Christy-Ann Archuleta, Silvia Terziotti
2020, Techniques and Methods 11-B12
With the increasing availability of 3D Elevation Program (3DEP) quality high resolution elevation data across the United States and the pressing need for better integrated elevation and hydrography data, the U.S. Geological Survey is developing guidance to improve the horizontal and vertical alignment of these datasets. The U.S. Geological Survey...
Projected climate and land use changes drive plant community composition in agricultural wetlands
Rachel K. Owen, Elisabeth B. Webb, David A. Haukos, Keith W. Goyne
2020, Environmental and Experimental Botany (175) 1-12
Playa wetlands in the Great Plains, USA support a wide variety of plant species not found elsewhere in this agriculturally-dominated region due to the ephemeral presence of standing water and hydric soils within playas. If longer dry periods occur due to climate change or if changes in surrounding land...
Defining the need for genetic stock assignment when describing stock demographics and dynamics: An example using Lake Whitefish in Lake Michigan
Daniel A. Isermann, Matthew J. Belnap, Keith N. Turnquist, Brian L. Sloss, Justin A. VanDeHey, Scott P. Hansen, David C. Caroffino
2020, Transactions of the American Fisheries Society (149) 398-413
Genetic stock assignment is not routinely used when describing the dynamics and demographics of individual stocks supporting mixed-stock fisheries, and capture location and timing are often used as alternative assignment methods. However, variation in stock demographics and dynamics may not be accounted for if stock assignments based on capture location...
A new data set of granitic rock strength values from Yosemite Valley, California: Applications to rock fall assessment
Brian D. Collins, Federica Sandrone, Laurent Gastaldo, Greg M. Stock, Michel Jaboyedoff
2020, Conference Paper, 54th US Rock Mechanics/Geomechanics Symposium
To explore connections between rock strength and rock falls, we undertook a comprehensive rock mechanics testing program for six granitic rock types in Yosemite Valley (California, USA) where rock falls are a common geomorphic and sometimes hazardous process. We collected samples from boulders located at the base of cliffs, with...
Mortality and cholinesterase inhibition in butterflies following aerial naled applications for mosquito control on the National Key Deer Refuge
Timothy Bargar, Chad Anderson, Anthony Sowers
2020, Archives of Environmental Contamination and Toxicology (79) 233-245
Natural resource managers are concerned about the impacts of aerial ultra-low volume spray (ULV) of insecticides for mosquito control (i.e., mosquito adulticides) and seek science-driven management recommendations that reduce risk but allow vector control for nearby human populations. Managers at the National Key Deer Refuge (Florida Keys, FL) are concerned...
Book Review of "Mathematical Geosciences: Hybrid Symbolic-Numeric Methods", by Joseph L. Awange, Béla Paláncz, Robert H. Lewis, and Lajos Völgyesi
Eric L. Geist
2020, Pure and Applied Geophysics (177) 3543-3544
No abstract available. ...
EERI earthquake reconnaissance report: 2019 Ridgecrest earthquake sequence
EERI Learning from Earthquakes Program, Katherine M. Scharer
Elizabeth S. Cochran, Benjamin A. Brooks, Susan E. Hough, Alexandra Pickering, James Luke Blair, Daniel J. Ponti, editor(s)
2020, Report
The Ridgecrest Earthquake Sequence began the morning of 4 July 2019 with an M6.4 earthquake at 10:33 a.m., closely following several small foreshocks. The epicenter of this event was roughly 11 miles (18 km) east-northeast of Ridgecrest (Figure 1) within the Naval Air Weapons Station China Lake (NAWS-CL). Seismic and...
A multifaceted reconstruction of the population structure and life history expressions of a remnant metapopulation of Bonneville Cutthroat Trout: Implications for maintaining intermittent connectivity
Phaedra E. Budy, Paul D. Thompson, Matt D. McKell, Gary P. Thiede, Timothy E. Walsworth, Mary M. Conner
2020, Transactions of the American Fisheries Society (149) 443-461
Fishes that evolutionarily demonstrated a fluvial life history expression and migrated to spawning and rearing habitat by using lotic corridors are increasingly impacted by fragmentation. The overall goal of this study was to identify the contemporary importance of main-stem connectivity and tributaries for maintaining life history expression, population structure, and...
Leachable phosphorus from senesced green ash and Norway mapleleaves in urban watersheds
Yi Wang, Anita Thompson, William R. Selbig
2020, Science of the Total Environment (743)
In urban watersheds, street tree leaf litter is a critical biogenic source of phosphorus (P) in stormwater runoff. Stormwater extracts P from leaf litter and transports it, through the storm sewer network, to a receiving waterbody potentially causing downstream eutrophication. The goal of this study is to understand P leaching dynamics of...
Genetic structure of Smallmouth Bass in the Lake Michigan and Upper Mississippi River drainages relates to habitat, distance, and drainage boundaries: Smallmouth bass population genetic structure
Peter T. Euclide, Jenna Ruzich, Scott P. Hansen, David Rowe, Troy G. Zorn, Wesley Larson
2020, Transaction of the American Fisheries Society (149) 383-397
Analysis of genetic connectivity helps to define stock boundaries and provides information on interpopulation dynamics, such as migration and spawning site fidelity. We used 16 microsatellite loci to describe the genetic population structure of 1,215 Smallmouth Bass Micropterus dolomieu from 32 sites throughout the upper Mississippi River and Lake Michigan watersheds. We...
The Cenozoic evolution of crustal shortening and left‐lateral shear in the central East Kunlun Shan: Implications for the uplift history of the Tibetan Plateau
Lydia M. Staisch, Nathan A Niemi, Marin K. Clark, Hong Chang
2020, Tectonics (39)
The timing of crustal shortening and strike‐slip faulting along the East Kunlun Shan provides insight into the history of surface uplift and may constrain the time at which the Tibetan Plateau reached high elevations. We investigate a series of extensional basins and restraining bends along the...
Gambel’s quail survey variability and implications for survey design in the Mohave Desert
Cory T. Overton, Michael L. Casazza, Daniel Connelley, Scott C. Gardner
2020, Wildlife Society Bulletin (44) 493-501
Careful design of a wildlife population monitoring strategy is necessary to obtain accurate and precise results whether the purpose of the survey is development of habitat suitability models, to estimate abundance, or assess site occupancy. Important characteristics to consider in survey design are sources of elevated variability, particularly within‐subject variability,...
Substantially greater carbon emissions estimated based on annual land-use transition data
Jiaojiao Diao, Jinxun Liu, Zhiliang Zhu, Mingshi Li, Benjamin M. Sleeter
2020, Remote Sensing (12)
Quantifying land-use and land-cover change (LULCC) effects on carbon sources and sinks has been very challenging because of the availability and quality of LULCC data. As the largest estuary in the United States, Chesapeake Bay is a rapidly changing region and is affected by human activities. A new annual land-use...
California Historical Intensity Mapping Project (CHIMP): A consistently reinterpreted dataset of seismic intensities for the past 162 years and implications for seismic hazard maps
Leah Salditch, Molly M. Gallahue, Madeleine C. Lucas, James S. Neely, Susan E. Hough, Seth Stein
2020, Seismological Research Letters (91) 2631-2650
Historical seismic intensity data are useful for myriad reasons, including assessment of the performance of Probabilistic Seismic Hazard Assessment (PSHA) models and corresponding hazard maps by comparing their predictions to a dataset of historically observed intensities in the region. To assess PSHA models for California, a long and consistently interpreted...
Research, monitoring, and evaluation of emerging issues and measures to recover the Snake River Fall Chinook Salmon ESU: January 2019 - December 2019
Kenneth Tiffan, Russell Perry, editor(s)
2020, Report
The portion of the Snake River fall Chinook salmon Oncorhynchus tshawytscha evolutionary significant unit (ESU) that spawns upstream of Lower Granite Dam transitioned from low to high abundance during 19922019 in association with U.S. Endangered Species Act recovery efforts and other federally mandated actions. This annual report focuses on (1)...
