Coalescent methods reconstruct contributions of natural colonization and stocking to origins of Michigan inland Cisco (Coregonus artedi)
Jared J. Homola, John D Robinson, Jeannette Kanefsky, Wendylee Stott, Gary Whelan, Kim T Scribner
2021, Journal of Great Lakes Research (47) 1781-1792
Fish population structure in previously glaciated regions is often influenced by natural colonization processes and human-mediated dispersal, including fish stocking. Endemic populations are of conservation interest because they may contain rare and unique genetic variation. While coregonines are native to certain Michigan inland lakes, some were stocked with fish from...
An experimental evaluation of the efficacy of imaging flow cytometry (FlowCam) for detecting invasive Dreissened and Corbiculid bivalve veligers
Whitney Hassett, Julie Zimmerman, Gretchen Rollwagen-Bollens, Stephen M. Bollens, Timothy D. Counihan
2021, Lake and Reservoir Management (37) 406-417
Zebra (Dreissena polymorpha) and quagga (D. bugensis) mussels, first introduced from central Asia into the Great Lakes of North America in the late 1980s, have crossed the continental divide and more recently spread across western North America. At the same time, several new technologies have been developed for the early...
Discrete sample introduction module for quantitative and isotopic analysis of methane and other gases by cavity ring-down spectroscopy
John Pohlman, Michael Casso, Cedric Magen, Emile M. Bergeron
2021, Environmental Science & Technology (55) 12066-12074
Carbon dioxide (CO2) and methane (CH4) are natural and anthropogenic products that play a central role in the global carbon cycle and regulating Earth’s climate. Applications utilizing laser absorption spectroscopy, which continuously measure concentrations and stable isotope ratios of these greenhouse gases,...
Spatiotemporal dynamics of CO2 gas exchange from headwater mountain streams
David W. Clow, Robert G. Striegl, Mark Dornblaser
2021, Journal of Geophysical Research: Biogeosciences (126)
Mountain streams play an important role in the global carbon cycle by transporting, metabolizing, and exchanging carbon they receive from the terrestrial environment. The rates at which these processes occur remain highly uncertain because of a paucity of observations and the difficulty of measuring gas exchange rates...
Mapping wetland burned area from Sentinel-2 across the southeastern United States and its contributions relative to Landsat 8 (2016-2019)
Melanie K. Vanderhoof, Todd Hawbaker, Casey Teske, Andrea Ku, Joe Noble, Joshua J. Picotte
2021, Fire (4)
Prescribed fires and wildfires are common in wetland ecosystems across the Southeastern United States. However, the wetland burned area has been chronically underestimated across the region due to (1) spectral confusion between open water and burned area, (2) rapid post-fire vegetation regrowth, and (3) high annual precipitation...
Exploring environmental factors that drive diel variations in tree water storage using wavelet analysis
Ryan Harmon, Holly Barnard, Frederick Day-Lewis, Deqiang Mao, Kamini Singha
2021, Frontiers in Water (3)
Internal water storage within trees can be a critical reservoir that helps trees overcome both short- and long-duration environmental stresses. We monitored changes in internal tree water storage in a ponderosa pine on daily and seasonal scales using moisture probes, a dendrometer, and time-lapse electrical resistivity imaging (ERI). These...
Evaluation of actual evapotranspiration rates from the Operational Simplified Surface Energy Balance (SSEBop) model in Florida and parts of Alabama and Georgia, 2000–17
Nicasio Sepulveda
2021, Scientific Investigations Report 2021-5072
Evapotranspiration (ET) is the water-vapor flux transported from the surface of the Earth into the atmosphere and is the sum of surface water directly evaporated and subsurface water transpired by plants. ET rates are commonly estimated by using potential or reference ET, which might differ from actual ET rates. Actual...
Estimation of dissolved-solids concentrations using continuous water-quality monitoring and regression models at four sites in the Yuma area, Arizona and California, January 2017 through March 2019
Jay R. Cederberg, Nicholas V. Paretti, Alissa L. Coes, Edyth Hermosillo, Lucia Andrade
2021, Scientific Investigations Report 2021-5080
Multiple linear regression models were developed to estimate dissolved-solids concentrations in water at four sites in the Yuma area between Imperial Dam, Arizona and California and the southerly international boundary with Mexico at San Luis, Arizona. Continuous and discrete water-quality data were collected at gaging stations in the Colorado River...
Assessment of barrier island morphological change in northern Alaska
Anna I. Hamilton, Ann E. Gibbs, Li H. Erikson, Anita C. Engelstad
2021, Open-File Report 2021-1074
Arctic barriers islands are highly dynamic features influenced by a variety of oceanographic, geologic, and environmental factors. Many Alaskan barrier islands and spits serve as habitat and protection for native species, as well as shelter the coast from waves and storms that cause flooding and degradation of coastal villages. This...
Seasonally dynamic nutrient modeling quantifies storage lags and time-varying reactivity across large river basins
Noah Schmadel, Judson Harvey, Gregory E. Schwarz
2021, Environmental Research Letters (16)
Nutrients that have gradually accumulated in soils, groundwaters, and river sediments in the United States over the past century can remobilize and increase current downstream loading, obscuring effects of conservation practices aimed at protecting water resources. Drivers of storage accumulation and release of nutrients are poorly understood at the spatial...
Nonlinear shifts in infectious rust disease due to climate change
Joan Dudney, Claire Willing, Adrian Das, Andrew M. Latimer, Jonathan C B Nesmith, John J. Battles
2021, Nature Communications (12)
Range shifts of infectious plant disease are expected under climate change. As plant diseases move, emergent abiotic-biotic interactions are predicted to modify their distributions, leading to unexpected changes in disease risk. Evidence of these complex range shifts due to climate change, however, remains largely speculative. Here, we combine a long-term...
The Holocene dynamics of Ryder Glacier and ice tongue in north Greenland
Matt O’Regan, Thomas M. Cronin, Brendan Reilly, Aage K. Olsen Alstrup, Laura Gemery, Anna Golub, Larry A. Mayer, Mathieu Morlighem, Matthias Moros, Ole L. Munk, Johan Nilsson, Christof Pearce, Henrieka Detlef, Christian Stranne, Flor Vermassen, Gabriel West, Martin Jakobsson
2021, The Cryosphere (15) 4073-4097
The northern sector of the Greenland Ice Sheet is considered to be particularly susceptible to ice mass loss arising from increased glacier discharge in the coming decades. However, the past extent and dynamics of outlet glaciers in this region, and hence their vulnerability to climate change, are poorly documented. In...
Thyroid disruption and oxidative stress in American kestrels following embryonic exposure to the alternative flame retardants, EHTBB and TBPH
CHristopher Goodchild, Natalie Karouna-Renier, Paula F. P. Henry, Robert J. Letcher, Sandra L. Schultz, Catherine M. Maddox, Thomas Bean, Lisa E. Peters, Vince P. Palace, Kimberly J. Fernie
2021, Environment International (157)
Brominated flame retardant chemicals, such as 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (EHTBB) (CAS #: 183658–27-7) and bis(2-ethylhexyl)-2,3,4,5-tetrabromophthalate (TBPH) (CAS #: 26040–51-7), have been detected in avian tissues and eggs from remote regions. Exposure to EHTBB and TBPH has been shown to cause oxidative stress and altered thyroid function...
Drivers of extreme water levels in a large, urban, high-energy coastal estuary – A case study of the San Francisco Bay
Cornelis M. Nederhoff, Rohin Saleh, Babak Tehranirad, Liv M. Herdman, Li H. Erikson, Patrick L. Barnard, Mick Van der Wegen
2021, Coastal Engineering (170)
Reliable and long-term hindcast data of water levels are essential in quantifying return period and values of extreme water levels. In order to inform design decisions on a local flood control district level, process-based numerical modeling has proven an essential tool...
Random variable
Ricardo A. Olea
2021, Book chapter, Encyclopedia of Mathematical Geosciences
A random variable is a function that assigns a value in a sample space to an element of an arbitrary set (James 1992; Pawlowsky-Glahn et al. 2015). It is a model for a random experiment: the arbitrary set is an abstraction of the experimental conditions, the values taken...
A ground motion model for GNSS peak ground displacement
Dara Elyse Goldberg, Diego Melgar, Gavin P. Hayes, Valerie J. Sahakian, Brendan W. Crowell
2021, Bulletin of the Seismological Society of America (111) 2393-2407
We present an updated ground‐motion model (GMM) for Mw">MwMw 6–9 earthquakes using Global Navigation Satellite Systems (GNSS) observations of the peak ground displacement (PGD). Earthquake GMMs inform a range of Earth science and...
Trade-offs in initial and long-term handling efficiency of PIT-tag and photographic identification methods
Lindsey Roberts, Abigail B. Fueka, Erin L. Muths, Bennett Hardy, Larissa L. Bailey
2021, Ecological Indicators (130)
Individual identification is required for long-term investigations that examine population-level changes in survival or abundance, and mechanisms associated with these changes in wild populations. Such identification generally requires the application of a unique mark, or the documentation of characteristics distinctive to each individual animal....
Is there tree senescence? The fecundity evidence
Tong Qiu, Marie-Claire Aavena Acuna, Robert A. Andrus, Davide Ascoli, Yves Bergeron, Roberta Berretti, Michal Bogdziewicz, Thomas Boivin, Raul Bonal, Thomas Caignard, Rafael Calama, Julio Camarero, Connie Clark, Benoit Courbaud, Sylvain Delzon, Sergio Donoso Calderon, William Farfan-Rios, Catherine A. Gehring, Gregory S. Gilbert, Cathryn H. Greenberg, Qinfeng Guo, Janneke Hille Ris Lambers, Hoshi Hoshizaki, Ines Ibanez, Valentin Journé, Christopher L. Kilner, Richard Kobe, WD Koenig, Georges Kunstler, Jalene M. LaMontagne, Mateusz Ledwon, James A. Lutz, Renzo Motta, Jonathan A. Myers, Thomas A. Nagel, Kyotaro Noguchi, Chase Nunez, Ian S. Pearse, Carlos Perez-Izquierdo, Lukasz Piechnik, John Poulson, Renata Poulton-Kamakura, Miranda Redmond, Chantal D. Reid, Kyle C. Rodman, C. Lane Scher, Harald Schmidt Van Marle, Barbara Seget, Shubhi Sharma, Miles Silman, Jennifer J. Swenson, Margaret Swift, Maria Uriarte, Giorgio Vacchiano, Renato Valencia, Andrew Vander Yacht, Thomas T. Veblen, Amy V. Whipple, Thomas G. Whitham, Andreas Wion, Joseph Wright, Kai Zhu, Jess K. Zimmerman, Magdalena Zywiec, James S. Clark
2021, Proceedings of the National Academy of Sciences (118)
Despite its importance for forest regeneration, food webs, and human economies, changes in tree fecundity with tree size and age remain largely unknown. The allometric increase with tree diameter assumed in ecological models would substantially overestimate seed contributions from large trees if fecundity eventually declines with...
Linking demographic rates to local environmental conditions: Empirical data to support climate adaptation strategies for Eleutherodactylus frogs
A.C. Rivera-Burgos, Jaime A. Collazo, Adam Terando, Krishna Pacifici
2021, Global Ecology and Conservation (28)
Conducting managed species translocations and establishing climate change refugia are adaptation strategies to cope with projected consequences of global warming, but successful implementation requires on-the-ground validation of demographic responses to transient climate conditions. Here we estimated the effect of nine...
Novel microbiome dominated by Arcobacter during anoxic excurrent flow from an ocean blue hole in Andros Island, The Bahamas
Deborah D. Iwanowicz, Robert B Jonas, William B. Schill, Kay Marano-Briggs
2021, PLoS ONE (16)
Andros Island, The Bahamas, composed of porous carbonate rock, has about 175 inland blue holes and over 50 known submerged ocean caves along its eastern barrier reef. These ocean blue holes can have both vertical and horizontal zones that penetrate under the island. Tidal forces drive water flow in and...
Distribution and abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the upper San Luis Rey River, San Diego County, California—2020 data summary
Scarlett L. Howell, Barbara E. Kus
2021, Data Series 1140
We surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) along the upper San Luis Rey River, near Lake Henshaw, in Santa Ysabel, California, in 2020. Surveys were completed at four locations: three downstream from Lake Henshaw, where nest monitoring occurred from 2015 to 2019 (Rey River Ranch [RRR], Cleveland...
Identifying the ecological and management implications of mangrove migration in the northern Gulf of Mexico
Michael Osland
2021, Report
Climate change is transforming ecosystems and affecting ecosystem goods and services. Along the Gulf of Mexico and Atlantic coasts of the southeastern United States, the frequency and intensity of extreme freeze events greatly influences whether coastal wetlands are dominated by freeze-sensitive woody plants (mangrove forests) or freeze-tolerant grass-like plants (salt...
Divergence in salinity tolerance of northern Gulf of Mexico eastern oysters under field and laboratory exposure
D.A. Marshall, S.M. Casas, W.C. Walton, F.S. Rikard, T.A. Palmer, N. Breaux, Megan K. La Peyre, J.B. Pollack, M.A. Kelly, J.F. LaPeyre
2021, Conservation Physiology (9)
The eastern oyster, Crassostrea virginica, is a foundation species within US Gulf of Mexico (GoM) estuaries that has experienced substantial population declines. As changes from management and climate are expected to continue to impact estuarine salinity, understanding how local oyster populations might respond and identifying populations with adaptations to more extreme...
Disruption of the Francisella noatunensis orientalis pdpA gene results in virulence attenuation and protection in zebrafish
John Hansen, Karina Ray, Po-Jui Chen, Susan Yun, Diane G. Elliott, Carla M. Conway, Michael Culcutt, Maureen K. Purcell, Timothy J Welch, John Patrick Bellah, Ellie Maureen Dalsky, Justin Blaine Greer, Esteban Soto
2021, Infection and Immunity (89)
Several Francisella spp. including F. noatunensis are regarded as important emerging pathogens of wild and farmed fish. However, very few studies have investigated the virulence factors that allow these bacterial species to be pathogenic in fish. The Francisella Pathogenicity Island (FPI) is a well-described, gene-dense region encoding major virulence factors for the...
Amphibian population responses to mitigation: Relative importance of wetland age and design
Emily Bea Oja, Leah S Swartz, Erin L. Muths, Blake R. Hossack
2021, Ecological Indicators (131)
Wetland creation is a common practice to mitigate for the loss of natural wetlands. However, there is still uncertainty about how effectively created wetlands replace habitat provided by natural wetlands. This uncertainty is due in part because post-construction monitoring of biological...
