Recreation economics to inform migratory species conservation: Case study of the northern pintail
Brady J. Mattsson, James A. Dubovsky, Wayne E. Thogmartin, Kenneth J. Bagstad, Joshua H. Goldstein, John B. Loomis, James E. Diffendorfer, Darius J. Semmens, Ruscena Wiederholt, Laura Lopez-Hoffman
2018, Journal of Environmental Management (206) 971-979
Quantification of the economic value provided by migratory species can aid in targeting management efforts and funding to locations yielding the greatest benefits to society and species conservation. Here we illustrate a key step in this process by estimating hunting and birding values of the northern pintail (Anas acuta) within...
Sequence stratigraphy, seismic stratigraphy, and seismic structures of the lower intermediate confining unit and most of the Floridan aquifer system, Broward County, Florida
Kevin J. Cunningham, Jared W. Kluesner, Richard L. Westcott, Edward Robinson, Cameron Walker, Shakira A. Khan
2018, Scientific Investigations Report 2017-5109
Deep well injection and disposal of treated wastewater into the highly transmissive saline Boulder Zone in the lower part of the Floridan aquifer system began in 1971. The zone of injection is a highly transmissive hydrogeologic unit, the Boulder Zone, in the lower part of the Floridan aquifer system. Since...
Landscape-scale variation in canopy water content of giant sequoias during drought
Tarin Paz-Kagan, Nicolas R. Vaughn, Roberta E. Martin, Philip G. Brodrick, Nathan L. Stephenson, Adrian Das, Koren R. Nydick, Gregory P. Asner
2018, Forest Ecology and Management (419-420) 291-304
Recent drought (2012–2016) caused unprecedented foliage dieback in giant sequoias (Sequoiadendron giganteum), a species endemic to the western slope of the southern Sierra Nevada in central California. As part of an effort to understand and map sequoia response to droughts, we studied the patterns of remotely sensed canopy water content...
Oak habitat recovery on California's largest islands: Scenarios for the role of corvid seed dispersal
Mario B. Pesendorfer, Christopher M. Baker, Martin Stringer, Eve McDonald-Madden, Michael Bode, Kathryn McEachern, Scott A. Morrison, T. Scott Sillett
2018, Journal of Applied Ecology (55) 1185-1194
Seed dispersal by birds is central to the passive restoration of many tree communities. Reintroduction of extinct seed dispersers can therefore restore degraded forests and woodlands. To test this, we constructed a spatially explicit simulation model, parameterized with field data, to consider the effect of different seed...
Numerical modeling of salt marsh morphological change induced by Hurricane Sandy
Kelin Hu, Q. Chen, Hongqing Wang, Ellen K. Hartig, Philip M. Orton
2018, Coastal Engineering (132) 63-81
The salt marshes of Jamaica Bay serve as a recreational outlet for New York City residents, mitigate wave impacts during coastal storms, and provide habitat for critical wildlife species. Hurricanes have been recognized as one of the critical drivers of coastal wetland morphology due to their effects on hydrodynamics and...
Drought-induced recharge promotes long-term storage of porewater salinity beneath a prairie wetland
Zeno F Levy, Donald O. Rosenberry, Robert Moucha, David M. Mushet, Martin B. Goldhaber, James W. LaBaugh, Anthony J Fiorentino, Donald I. Siegel
2018, Journal of Hydrology (557) 391-409
Subsurface storage of sulfate salts allows closed-basin wetlands in the semiarid Prairie Pothole Region (PPR) of North America to maintain moderate surface water salinity (total dissolved solids [TDS] from 1 to 10 g L−1), which provides critical habitat for communities of aquatic biota. However, it is unclear how the salinity of wetland...
Dual-phase mass balance modeling of small mineral particle losses from sedimentary rock-derived soils
Carleton R. Bern, Tiffany Yesavage
2018, Chemical Geology (476) 441-455
Losses of small mineral particles can be a significant physical process that affects the elemental composition of soils derived from sedimentary rocks. Shales, in particular, contain abundant clay-sized minerals that can be mobilized by simple disaggregation, and solutional weathering is limited because the parent rock is composed primarily of recalcitrant minerals...
The timing and origin of pre- and post-caldera volcanism associated with the Mesa Falls Tuff, Yellowstone Plateau volcanic field
Mark E. Stelten, Duane E. Champion, Mel A. Kuntz
2018, Journal of Volcanology and Geothermal Research (350) 47-60
We present new sanidine 40Ar/39Ar ages and paleomagnetic data for pre- and post-caldera rhyolites from the second volcanic cycle of the Yellowstone Plateau volcanic field, which culminated in the caldera-forming eruption of the Mesa Falls Tuff at ca. 1.3 Ma. These data allow for a detailed reconstruction of the eruptive history of the second volcanic cycle and...
From salmon to shad: Shifting sources of marine-derived nutrients in the Columbia River Basin
Craig A. Haskell
2018, Ecology of Freshwater Fish (27) 310-322
Like Pacific salmon (Oncorhynchus spp.), nonnative American shad (Alosa sapidissima) have the potential to convey large quantities of nutrients between the Pacific Ocean and freshwater spawning areas in the Columbia River Basin (CRB). American shad are now the most numerous anadromous fish in the CRB, yet the magnitude of the resulting...
The influence of bed friction variability due to land cover on storm-driven barrier island morphodynamics
Davina Passeri, Joseph W. Long, Nathaniel G. Plant, Matthew V. Bilskie, Scott C. Hagen
2018, Coastal Engineering (132) 82-94
Variations in bed friction due to land cover type have the potential to influence morphologic change during storm events; the importance of these variations can be studied through numerical simulation and experimentation at locations with sufficient observational data to initialize realistic scenarios, evaluate model accuracy and guide interpretations. Two-dimensional in...
Loss of dendritic connectivity in southern California's urban riverscape facilitates decline of an endemic freshwater fish
Jonathan Q. Richmond, Adam R. Backlin, Carey Galst-Cavalcante, John W. O’Brien, Robert N. Fisher
2018, Molecular Ecology (27) 369-386
Life history adaptations and spatial configuration of metapopulation networks allow certain species to persist in extreme fluctuating environments, yet long-term stability within these systems relies on the maintenance of linkage habitat. Degradation of such linkages in urban riverscapes can disrupt this dynamic in aquatic species, leading to increased extinction debt...
Estimating the per-capita contribution of habitats and pathways in a migratory network: A modelling approach
Ruscena Wiederholt, Brady J. Mattsson, Wayne E. Thogmartin, Michael C. Runge, Jay E. Diffendorfer, Richard A. Erickson, Paula Federico, Laura Lopez-Hoffman, John Fryxell, D. Ryan Norris, Christine Sample
2018, Ecography (41) 815-824
Every year, migratory species undertake seasonal movements along different pathways between discrete regions and habitats. The ability to assess the relative demographic contributions of these different habitats and pathways to the species’ overall population dynamics is critical for understanding the ecology of migratory species, and also has practical applications for...
Inferring epidemiologic dynamics from viral evolution: 2014–2015 Eurasian/North American highly pathogenic avian influenza viruses exceed transmission threshold, R0 = 1, in wild birds and poultry in North America
Daniel R. Grear, Jeffrey S. Hall, Robert J. Dusek, S. Ip
2018, Evolutionary Applications (11) 547-557
Highly pathogenic avian influenza virus (HPAIV) is a multihost pathogen with lineages that pose health risks for domestic birds, wild birds, and humans. One mechanism of intercontinental HPAIV spread is through wild bird reservoirs, and wild birds were the likely sources of a Eurasian (EA) lineage HPAIV into North America...
Viscous relaxation as a prerequisite for tectonic resurfacing on Ganymede: Insights from numerical models of lithospheric extension
Michael T. Bland, William B. McKinnon
2018, Icarus (306) 285-305
Ganymede’s bright terrain formed during a near-global resurfacing event (or events) that produced both heavily tectonized and relatively smooth terrains. The mechanism(s) by which resurfacing occurred on Ganymede (e.g., cryovolcanic or tectonic), and the relationship between the older, dark and the younger, bright terrain are fundamental to understanding the geological...
Living on the edge: Opportunities for Amur tiger recovery in China
Tianming Wang, J. Andrew Royle, J.L.D. Smith, Liang Zou, Xinyue Lu, Tong Li, Haitao Yang, Zhilin Li, Rongna Feng, Yajing Bian, Limin Feng, Jianping Ge
2018, Biological Conservation (217) 269-279
Sporadic sightings of the endangered Amur tiger Panthera tigris altaica along the China-Russia border during the late 1990s sparked efforts to expand this subspecies distribution and abundance by restoring potentially suitable habitats in the Changbai Mountains. To guide science-based recovery efforts and provide a baseline for future monitoring of this...
Characterizing storm response and recovery using the beach change envelope: Fire Island, New York
Owen T. Brenner, Erika E. Lentz, Cheryl J. Hapke, Rachel E. Henderson, Kathleen Wilson, Timothy Nelson
2018, Geomorphology (300) 189-202
Hurricane Sandy at Fire Island, New York presented unique challenges in the quantification of storm impacts using traditional metrics of coastal change, wherein measured changes (shoreline, dune crest, and volume change) did not fully reflect the substantial changes in sediment redistribution following the storm. We used a time series of...
6th international conference on Mars polar science and exploration: Conference summary and five top questions
Isaac B. Smith, Serina Diniega, David W. Beaty, Thorsteinn Thorsteinsson, Patricio Becerra, Ali Bramson, Stephen M. Clifford, Christine S. Hvidberg, Ganna Portyankina, Sylvain Piqueux, Aymeric Spiga, Timothy N. Titus
2018, Icarus (308) 2-14
We provide a historical context of the International Conference on Mars Polar Science and Exploration and summarize the proceedings from the 6th iteration of this meeting. In particular, we identify five key Mars polar science questions based primarily on presentations and discussions at the conference and discuss the overlap between...
The 2015 Gorkha (Nepal) Earthquake sequence: I. Source modeling and deterministic 3D ground shaking
Shengji Wei, Meng Chen, Xin Wang, Robert Graves, Eric Lindsey, Teng Wang, Cagil Karakas, Don Helmberger
2018, Tectonophysics (722) 447-461
To better quantify the relatively long period (< 0.3 Hz) shaking experienced during the 2015 Gorkha (Nepal) earthquake sequence, we study the finite rupture processes and the associated 3D ground motion of the Mw7.8 mainshock and the Mw7.2 aftershock. The 3D...
A Holocene record of ocean productivity and upwelling from the northern California continental slope
Jason A. Addison, John A. Barron, Bruce P. Finney, Jennifer E. Kusler, David Bukry, Linda E. Heusser, Clark R. Alexander
2018, Quaternary International (469) 96-108
The Holocene upwelling history of the northern California continental slope is examined using the high-resolution record of TN062-O550 (40.9°N, 124.6°W, 550 m water depth). This 7-m-long marine sediment core spans the last ∼7500 years, and we use it to test the hypothesis that marine productivity in the California Current System (CCS)...
Characterizing uncertainty in daily streamflow estimates at ungauged locations for the Massachusetts sustainable yield estimator
William H. Farmer, Sara B. Levin
2018, Journal of the American Water Resources Association (54) 198-210
Hydrologic characterization at ungauged locations is one of the quintessential challenges of hydrology. Beyond simulation of historical streamflows, it is similarly important to characterize the level of uncertainty in hydrologic estimates. In tandem with updates to Massachusetts Sustainable Yield Estimator, this work explores the application of...
A spatial approach to combatting wildlife crime
Sally C. Faulkner, Michael C.A. Stevens, Stephanie S. Romanach, Peter A. Lindsey, Steven C. LeComber
2018, Conservation Biology (32) 685-693
Poaching can have devastating impacts on animal and plant numbers, and in many countries has reached crisis levels, with illegal hunters employing increasingly sophisticated techniques. Here, we show how geographic profiling – a mathematical technique originally developed in criminology and recently applied to animal foraging and epidemiology – can be...
Using halogens (Cl, Br, I) to understand the hydrogeochemical evolution of drought-derived saline porewater beneath a prairie wetland
Zeno F. Levy, Christopher T. Mills, Zunli Lu, Martin B. Goldhaber, Donald O. Rosenberry, David M. Mushet, Laura K. Lautz, Xiaoli Zhou, Donald I. Siegel
2018, Chemical Geology (476) 191-207
Numerous closed-basin prairie wetlands throughout the Prairie Pothole Region (PPR) of North America maintain moderate surface pond salinities (total dissolved solids [TDS] from 1 to 10 g L− 1) under semiarid climate by accumulation of gypsum and saline lenses of sulfate-rich porewater (TDS > 10 g L− 1) in wetland sediments during droughts. In order to understand the...
Multi-model comparison highlights consistency in predicted effect of warming on a semi-arid shrub
Katherine M. Renwick, Caroline Curtis, Andrew R. Kleinhesselink, Daniel R. Schlaepfer, Bethany A. Bradley, Cameron L. Aldridge, Benjamin Poulter, Peter B. Adler
2018, Global Change Biology (24) 424-438
A number of modeling approaches have been developed to predict the impacts of climate change on species distributions, performance, and abundance. The stronger the agreement from models that represent different processes and are based on distinct and independent sources of information, the greater the confidence we can have in their...
Estimating disperser abundance using open population models that incorporate data from continuous detection PIT arrays
Maria C. Dzul, Charles B. Yackulic, Josh Korman
2018, Canadian Journal of Fisheries and Aquatic Sciences (75) 1393-1404
Autonomous passive integrated transponder (PIT) tag antenna systems continuously detect individually marked organisms at one or more fixed points over long time periods. Estimating abundance using data from autonomous antennae can be challenging, because these systems do not detect unmarked individuals. Here we pair PIT antennae data from a tributary...
Influences of landscape heterogeneity on home-range sizes of brown bears
Lindsey S. Mangipane, Jerrold L. Belant, Tim L. Hiller, Michael E. Colvin, David Gustine, Buck A. Mangipane, Grant V. Hilderbrand
2018, Mammalian Biology (88) 1-7
Animal space use is influenced by many factors and can affect individual survival and fitness. Under optimal foraging theory, individuals use landscapes to optimize high-quality resources while minimizing the amount of energy used to acquire them. The spatial resource variability hypothesis states that as patchiness of resources increases, individuals use...
