Stream dissolved organic matter in permafrost regions shows surprising compositional similarities but negative priming and nutrient effects
Ethan Wologo, Sarah Shakil, Scott Zolkos, Sadie R. Textor, Stephanie Ewing, Jane Klassen, Robert G. M. Spencer, David C. Podgorski, Suzanne E. Tank, Michelle Baker, Jonathan A. O’Donnell, Kimberly P. Wickland, Sydney Foks, Jay P. Zarnetske, Joseph Lee-Cullin, Futing Liu, Yuanhe Yang, Pirkko Kortelainen, Jaana Kolehmainen, Joshua F. Dean, Jorien E. Vonk, Robert M. Holmes, Gilles Pinay, Michaela M. Powell, Jansen Howe, Rebecca J. Frei, Samuel P. Bratsman, Benjamin W. Abbott
2021, Global Biogeochemical Cycles (35)
Permafrost degradation is delivering bioavailable dissolved organic matter (DOM) and inorganic nutrients to surface water networks. While these permafrost subsidies represent a small portion of total fluvial DOM and nutrient fluxes, they could influence food webs and net ecosystem carbon balance via priming or nutrient effects...
Generation of calc-alkaline magmas during crystallization at high oxygen fugacity: An experimental and petrologic study of tephras from Buldir Volcano, western Aleutian Arc, Alaska, USA
Laura Waters, Elizabeth Cottrell, Michelle L. Coombs, Katherine A. Kelley
2021, Journal of Petrology (62)
Despite agreement that calc-alkaline volcanism occurs at subduction zones and is responsible for the genesis of continental landmasses, there is no consensus on the source of the Fe-depleted signature hallmark to calc-alkaline volcanism. In this study, we utilize mafic tephras collected from Buldir Volcano to address the genesis of...
Lock operations influence upstream passages of invasive and native fishes at a Mississippi River high-head dam
Andrea K. Fritts, Brent C. Knights, Jessica C. Stanton, Amanda S. Milde, Jonathan M. Vallazza, Marybeth K. Brey, Sara J. Tripp, Thomas E. Devine, Wesley Sleeper, James T. Lamer, Kyle J. Mosel
2021, Biological Invasions (23) 771-794
Asian carps continue to expand their range in North America, necessitating efforts to limit the spread and establishment of reproducing populations. Mississippi River Lock and Dam 19 is a high-head dam that represents a population ‘pinch-point’ as passage through the lock chamber is the only means by which fishes can...
Behavioral responses of sea lamprey (Petromyzon marinus) and white sucker (Catostomus commersonii) to turbulent flow during fishway passage attempts
Sean A. Lewandoski, Peter J. Hrodey, Scott M. Miehls, Paul Piszczek, Daniel Zielinski
2021, Canadian Journal of Fisheries and Aquatic Sciences (78) 409-421
An understanding of how undesirable and desirable fish species respond behaviorally to turbulent flow in fishways would guide development of selective fish passage techniques. We applied high-resolution computational fluid dynamics modeling and competing risks analysis towards the development of predictive selective passage models. Sea lamprey (Petromyzon marinus; an invasive fish...
USGS44, a new high-purity calcium carbonate reference material for δ13C measurements
Haiping Qi, Heiko Moossen, Harro A.J. Meijer, Tyler B. Coplen, Anita T Aerts-Bijma, Lauren T Reid, Heiko Geilmann, Jurgen Richter, Michael Rothe, Willi A. Brand, Blaza Toman, Jacqueline Benefield, Jean-Francois Helie
2021, Rapid Communications in Mass Spectrometry (35)
RationaleThe stable carbon isotopic (δ13C) reference material (RM) LSVEC Li2CO3 has been found to be unsuitable for δ13C standardization work because its δ13C value increases with exposure to atmospheric CO2. A new CaCO3 RM, USGS44, has been prepared to alleviate this situation.MethodsUSGS44 was prepared from 8 kg of Merck...
Sediment dynamics of a divergent bay–marsh complex
Daniel J. Nowacki, Neil K. Ganju
2021, Estuaries and Coasts (44) 1216-1230
Bay–marsh systems, composed of an embayment surrounded by fringing marsh incised by tidal channels, are widely distributed coastal environments. External sediment availability, marsh-edge erosion, and sea-level rise acting on such bay–marsh complexes may drive diverse sediment-flux regimes. These factors reinforce the ephemeral and dynamic nature of fringing marshes: material released...
Generalizing the inversion‐based PSHA source model for an interconnected fault system
Edward H. Field, Kevin R. Milner, Morgan T. Page
2021, Bulletin of the Seismological Society of America (111) 371-390
This article represents a step toward generalizing and simplifying the procedure for constructing an inversion‐based seismic hazard source model for an interconnected fault system, including the specification of adjustable segmentation constraints. A very simple example is used to maximize understandability and to counter the notion that an inversion approach is...
Teleseismic P‐qave coda autocorrelation imaging of crustal and basin structure, Bighorn Mountains Region, Wyoming, U.S.A.
Steven Plescia, Anne Sheehan, Seth S. Haines, Lindsay Worthington, Scott Cook, Justin Ball
2021, Bulletin of the Seismological Society of America (111) 466-475
We demonstrate successful crustal imaging via teleseismic P‐wave coda autocorrelation, using data recorded on a 261 station array of vertical‐component high‐frequency geophones in the area of the Bighorn Mountains, Wyoming, U.S.A. We autocorrelate the P‐wave coda of 30 teleseismic events and use phase‐weighted stacking to...
Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway
Kathy Dunlop, Antti P. Eloranta, Erik Schoen, Mark S. Wipfli, Jenny L. A. Jensen, Rune Muladal, Guttorm N. Christensen
2021, Ecology of Freshwater Fish (30) 270-283
Recent large influxes of non-native Pacific pink salmon (Oncorhynchus gorbuscha) to North European rivers have raised concern over their potential negative impacts on native salmonids and recipient ecosystems. The eggs and carcasses of semelparous pink salmon may provide a significant nutrient and energy subsidy to native biota, but this phenomenon...
Ancient Egyptian mummified shrews (Mammalia: Eulipotyphla: Soricidae) and mice (Rodentia: Muridae) from the Spanish Mission to Dra Abu el-Naga, and their implications for environmental change in the Nile valley during the past two millennia
Neal Woodman, Salima Ikram
2021, Quaternary Research (100) 21-31
Excavation of Ptolemaic Period (ca. 309–30 BC) strata within Theban Tombs 11, 12, -399-, and UE194A by the Spanish Mission to Dra Abu el-Naga (also known as the Djehuty Project), on the west bank of the Nile River opposite Luxor, Egypt, yielded remains of at least 175 individual small mammals...
How to identify win–win interventions that benefit human health and conservation
Skylar R. Hopkins, Susanne H. Sokolow, Julia C Buck, Giulio A. De Leo, Isabel J. Jones, Laura H Kwong, Christopher LeBoa, Andrea J Lund, Andrew J MacDonald, Nicole Nova, Sarah H Olson, Alison J. Peel, Chelsea L. Wood, Kevin D. Lafferty
2021, Nature Sustainability (4) 298-304
To reach the Sustainable Development Goals, we may need to act on synergies between some targets while mediating trade-offs between other targets. But what, exactly, are synergies and trade-offs, and how are they related to other outcomes, such as ‘win–win’ solutions? Finding limited guidance in the...
Mainstems: A logical data model implementing mainstem and drainage basin feature types based on WaterML2 Part 3: HY Features concepts
David L. Blodgett, J. Micheal Johnson, Mark Sondheim, Michael Wieczorek, Nels Frazier
2021, Environmental Modelling and Software (135)
The Mainstems data model implements the catchment and flowpath concepts from WaterML2 Part 3: Surface Hydrology Features (HY_Features) for persistent, cross-scale, identification of hydrologic features. The data model itself provides a focused and lightweight method to describe hydrologic networks with minimum but sufficient information. The design is intended...
The demographic contributions of connectivity versus local dynamics to population growth of an endangered bird
Brian Reichert, Fletcher, Wiley M. Kitchens
2021, Journal of Animal Ecology (90) 574-584
Conservation and management increasingly focus on connectivity, because connectivity driven by variation in immigration rates across landscapes is thought to be crucial for maintaining local population and metapopulation persistence. Yet, efforts to quantify the relative role of immigration on population growth across the entire range of species and over...
From satellites to frogs: Quantifying ecohydrological change, drought mitigation, and population demography in desert meadows
David S. Pilliod, Mark B. Hausner, Rick D. Scherer
2021, Science of the Total Environment (758)
Increasing frequency and severity of droughts have motivated natural resource managers to mitigate harmful ecological and hydrological effects of drought, but drought mitigation is an emerging science and evaluating its effectiveness is difficult. We examined ecohydrological responses of drought...
Feeling the squeeze: Adult run size and habitat availability limit juvenile river herring densities in lakes
Matthew T. Devine, Julianne Rosset, Allison H. Roy, Benjamin I. Gahagan, Michael P. Armstrong, Andrew R. Whiteley, Adrian Jordaan
2021, Transactions of the American Fisheries Society (150) 207-221
Maximum densities of juvenile river herring (Alewife Alosa pseudoharengus and Blueback Herring A. aestivalis) vary among freshwater lakes, likely due to densities of adult spawners. Differences in habitat availability and lake water quality may also contribute to variation in juvenile river herring productivity between populations, yet these relationships have not been tested across...
A lagrangian-to-eulerian metric to identify estuarine pelagic habitats
Paul Stumpner, Jon R. Burau, Alexander L. Forrest
2021, Estuaries and Coasts (44) 1231-1249
Estuaries are among the world’s most productive ecosystems, but recent natural and anthropogenic changes have stressed these ecosystems. Tools to assess estuarine pelagic habitats are important to support and maintain healthy ecosystem function. In this work, we demonstrate that estuarine pelagic habitats can be identified by...
A 450-year record of environmental change from Castle Lake, California (USA), inferred from diatoms and organic geochemistry
Paula Noble, Gary A. McGaughey, Michael R. Rosen, Christopher C. Fuller, Marco A. Aquino-Lopez, Sudeep Chandra
2021, Journal of Paleolimnology (65) 201-217
A 39-cm sediment core from Castle Lake, California (USA) spans the last ~ 450 years and was analyzed for diatoms and organic geochemistry (δ15N, δ13C, and C:N), with the goal of determining sensitivity to natural climate variation and twentieth century anthropogenic effects. Castle Lake is a subalpine, nitrogen-limited lake...
Application of genetic stock identification and parentage-based tagging in a mixed-stock recreational chinook salmon fishery
Alexander J. Jensen, Carl B. Schreck, Jon E. Hess, Sandra Bohn, Kathleen G. O’Malley, James Peterson
2021, North American Journal of Fisheries Management (41) 130-141
Genetic methods can guide and improve the management of recreational mixed-stock fisheries by informing stock-specific estimates of harvest. We applied genetic stock identification and parentage-based tagging to a recreational Chinook Salmon Oncorhynchus tshawytscha fishery in the Columbia River to illustrate the value of genetic analysis in management. We...
Testing a continuous measure of recreation specialization among birdwatchers
H.W. Harshaw, Nicholas W. Cole, Ashley A. Dayer, Jonathan D. Rutter, David C. Fulton, Andrew H. Raedeke, Rudy Schuster, Jennifer N. Duberstein
2021, Human Dimensions of Wildlife (26) 472-480
Recreation specialization is a framework that can be used to explain the variation among outdoor recreationists’ preferences, attitudes, and behaviors. Recreation specialization has been operationalized using several approaches, including summative indices, cluster analysis, and self-classification categorical measures. Although these approaches measure the multiple dimensions of the framework,...
A century of pollen foraging by the endangered rusty patched bumble bee (Bombus affinis): Inferences from molecular sequencing of museum specimens
Michael P. Simanonok, Clint Otto, Robert S. Cornman, Deborah D. Iwanowicz, James P. Strange, Tamara A. Smith
2021, Biodiversity and Conservation (30) 123-137
In 2017 the rusty patched bumble bee (Bombus affinis) became the first bee listed under the Endangered Species Act in the continental United States due to population declines and an 87% reduction in the species’ distribution. Bombus affinis decline began in the 1990s, predating modern bee surveying initiatives,...
Perceived constraints and negotiations to trout fishing in Georgia based on angler specialization level
H. J. TenHarmsel, B. B. Boley, Brian J. Irwin, Cecil A. Jennings
2021, North American Journal of Fisheries Management (41) 115-129
Anglers face constraints that influence participation and dropout rates. Some recreational anglers may be able to negotiate constraints by altering the timing or frequency of participation, acquiring new skills, or modifying nonrecreational aspects such as family or work responsibilities. We consider data collected via a mail survey from Georgia-resident trout...
Spectral inversion for seismic site response in central Oklahoma: Low-frequency resonances from the Great Unconformity
Morgan P. Moschetti, Stephen H. Hartzell
2021, Bulletin of Seismological Society of America (111) 87-100
We investigate seismic site response by inverting seismic ground‐motion spectra for site and source spectral properties, in a region of central Oklahoma, where previous ground‐motion studies have indicated discrepancies between observations and ground‐motion models (GMMs). The inversion is constrained by a source spectral model, which...
Stability of inorganic and methylated arsenic species in laboratory standards, surface water and groundwater under three different preservation regimes
Sarah Stetson, Melinda L. Erickson, Jeffrey Brenner, Emily C. Berquist, Christopher J. Kanagy, Susan Melissa Whitcomb, Caitlyn Margaret Lawrence
2021, Applied Geochemistry (125)
Geogenic arsenic (As) adversely affects drinking water quality in geologically diverse aquifers across the globe. Although the species of As significantly affects its fate, transport, toxicity, and As treatment technology efficacy, reported effectiveness of As species preservation methods varies widely with...
Survival is negatively associated with glucocorticoids in a wild ungulate neonate
Tess Michelle Gingery, Duane R. Diefenbach, Catharine E. Pritchard, David C. Ensminger, Bret D. Wallingford, Christopher S. Rosenberry
2021, Integrative Zoology (16) 214-225
It is unknown how ungulate physiological responses to environmental perturbation influence overall population demographics. Moreover, neonatal physiological responses remain poorly studied despite the importance of neonatal survival to population growth. Glucocorticoid (GC) hormones potentially facilitate critical physiological and behavioral responses to environmental perturbations. However, elevated GC concentrations over time may...
Clothianidin decomposition in Missouri wetland soils
C. J. Beringer, K. W. Goyne, R. N. Lerch, Elisabeth B. Webb, D. Mengel
2021, Journal of Environmental Quality (50) 241-251
Neonicotinoid pesticides can persist in soils for extended time periods; however, they also have a high potential to contaminate ground and surface waters. Studies have reported negative effects associated with neonicotinoids and nontarget taxa, including aquatic invertebrates, pollinating insect species, and insectivorous birds. This study evaluated factors associated with clothianidin...
