De facto water reuse: Bioassay suite approach delivers depth and breadth in endocrine active compound detection
Elizabeth K Medlock Kakaley, Brett R. Blackwell, Mary C. Cardon, Justin M. Conley, Nicola Evans, David J. Feifarek, Edward Furlong, Susan T. Glassmeyer, L. Earl Gray, Phillip C. Hartig, Dana W. Kolpin, Marc A. Mills, Laura Rosenblum, Daniel L. Villeneuve, Vickie S. Wilson
2020, Science of the Total Environment (699) 1-12
Although endocrine disrupting compounds (EDCs) have been detected in wastewater and surface waters worldwide using a variety of in vitro effects-based screening tools, e.g. bioassays, few have examined potential attenuation of environmental contaminants by both natural (sorption, degradation, etc) and anthropogenic (water treatment practices) processes. This study used several bioassays...
A range-wide model of contemporary, omnidirectional connectivity for the threatened Mojave desert tortoise
Miranda E Gray, Brett G. Dickson, Kenneth Nussear, Todd Esque, Tony Chang
2020, Ecosphere (10)
As habitat destruction leads to species extinctions globally, conservation planning that accounts for population-level connectivity and gene flow is an urgent priority. Models that only approximate habitat potential are incomplete because areas of high habitat potential may be isolated, whereas intermixed areas of lower habitat potential may still be critical...
Permafrost hydrology drives the assimilation of old carbon by stream food webs in the Arctic
Jonathon A O'Donnell, Michael P. Carey, Joshua C. Koch, Xiaomei Xu, Brett Poulin, Jennifer Walker, Christian E. Zimmerman
2020, Ecosystems (23) 435-453
Permafrost thaw in the Arctic is mobilizing old carbon (C) from soils to aquatic ecosystems and the atmosphere. Little is known, however, about the assimilation of old C by aquatic food webs in Arctic watersheds. Here, we used C isotopes (δ13C, Δ14C) to quantify C assimilation by biota across 12...
Attack of the PCR clones: Rates of clonality have little effect on RAD-seq genotype calls
Peter T. Euclide, Garrett McKinney, Matthew Bootsma, Charlene Tarsa, Mariah Meek, Wesley Larson
2020, Molecular Ecology Resources (20) 66-78
Interpretation of high-throughput sequence data requires an understanding of how decisions made during bioinformatic data processing can influence results. One source of bias that is often cited is PCR clones (or PCR duplicates). PCR clones are common in restriction site-associated sequencing (RAD-seq) data sets, which are...
Influence of a high-head dam as a dispersal barrier to fish community structure of the Upper Mississippi River
Rebekah L. Anderson, Cory A. Anderson, James H. Larson, Brent C. Knights, Jonathan M. Vallazza, Sean E. Jenkins, James T. Lamer
2020, River Research and Applications (36) 47-56
In river systems, high‐head dams may increase the distance‐decay of fish community similarity by creating nearly impermeable dispersal barriers to certain species from upstream reaches. Substantial evidence suggests that migratory species are impacted by dams, and most previous studies in stream/river networks have focused on small streams and headwaters. Here,...
Porphyry copper potential of the U.S. Southern Basin and Range using ASTER data integrated with geochemical and geologic datasets to assess potential near-surface deposits in well-explored permissive tracts
John C. Mars, Robinson Jr., Jane M. Hammarstrom, Lukas Zurcher, Helen A. Whitney, Federico Solano, Mark E. Gettings, Stephen Ludington
2020, Economic Geology (114) 1095-1121
ArcGIS was used to spatially assess and rank potential porphyry copper deposits using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data together with geochemical and geologic datasets in order to estimate undiscovered deposits in the southern Basin and Range Province in the southwestern United States. The assessment was done...
Incorporating climate change into invasive species management: Insights from managers
Evelyn M. Beaury, Emily J. Fusco, Michelle R. Jackson, Brittany B. Laginhas, Toni Lyn Morelli, Jenica M. Allen, Valerie J. Pasquarella, Bethany A. Bradley
2020, Biological Invasions (22) 233-252
Invasive alien species are likely to interact with climate change, thus necessitating management that proactively addresses both global changes. However, invasive species managers’ concerns about the effects of climate change, the degree to which they incorporate climate change into their management, and what stops them from doing so remain unknown....
The influence of sample matrix on the accuracy of nitrite N and O isotope ratio analyses with the azide method
Julie Granger, Danielle S. Boshers, J.K. Bohlke, Dan Yu, Nengwang Chen, Craig R. Tobias
2020, Rapid Communications in Mass Spectrometry (34)
RationaleThe isotope ratios of nitrogen (15N/14N) and oxygen (18O/16O) in nitrite (NO2−) can be measured by conversion of the nitrite into nitrous oxide (N2O) with azide, followed by mass spectrometric analysis of N2O by gas chromatography isotope ratio mass spectrometry (GC/IRMS). While applying this method to brackish...
Temporal patterns of induced seismicity in Oklahoma revealed from multi-station template matching
Robert J. Skoumal, Michael R. Brudzinski, Brian S. Currie, Rosamiel Ries
2020, Journal of Seismology (24) 921-935
Over the past decade, Oklahoma became the most seismically active region of the mid-Continental USA as a result of industry operations. However, seismic network limitations and completeness of earthquake catalogs have restricted the types of analyses that can be performed. By applying multi-station template matching on the 23,889 cataloged earthquakes...
A meta-analysis of global crop water productivity of three leading world crops (wheat, corn, and rice) in the irrigated areas over three decades
Daniel J. Foley, Prasad Thenkabail, Itiya Aneece, Pardhasaradhi Teluguntla, Adam Oliphant
2020, International Journal of Digital Earth (13) 939-975
The overarching goal of this study was to perform a comprehensive meta-analysis of irrigated agricultural Crop Water Productivity (CWP) of the world’s three leading crops: wheat, corn, and rice based on three decades of remote sensing and non-remote sensing-based studies. Overall, CWP data from 148 crop growing study sites (60...
Understanding melt evolution and eruption dynamics of the 1666 C.E. eruption of Cinder Cone, Lassen Volcanic National Park, California: Insights from olivine-hosted melt inclusions
Kristina J Walowski, P.J. Wallace, K.V. Cashman, J.K. Marks, Michael A. Clynne, P. Ruprecht
2020, Journal of Volcanology and Geothermal Research (387)
Cinder Cone is the youngest scoria cone volcano in the continental United States. Erupted in 1666 C.E. within what is now Lassen Volcanic National Park, Cinder Cone is an un-vegetated scoria cone with well-preserved lava flows and tephra deposits that display...
Species-specific responses to wetland mitigation among amphibians in the Greater Yellowstone Ecosystem
LK Swartz, WH Lowe, Erin L. Muths, Blake R. Hossack
2020, Restoration Ecology (28) 206-214
Habitat loss and degradation are leading causes of biodiversity declines, therefore assessing the capacity of created mitigation wetlands to replace habitat for wildlife has become a management priority. We used single season occupancy models to compare the occurrence of larvae of four species of pond‐breeding amphibians in wetlands created for...
Maximum entropy derived statistics of sound speed structure in a fine-grained sediment inferred from sparse broadband acoustic measurements on the New England continental shelf
David P. Knobles, Preston S. Wilson, J.A. Goff, L. Wan, M.J. Buckingham, Jason Chaytor, Mohsen Badiey
2020, IEEE Journal of Oceanic Engineering (45) 161-173
Marginal probability distributions for parameters representing an effective sound-speed structure of a fine-grained sediment are inferred from a data ensemble maximum entropy method that utilizes a sparse spatially distributed set of received pressure time series resulting from multiple explosive sources in a shallow-water ocean environment possessing significant spatial variability of...
Social attraction used to establish Caspian tern nesting colonies in San Francisco Bay
C. Alex Hartman, Joshua T. Ackerman, Mark P. Herzog, Cheryl Strong, David A Trachtenbarg
2020, Global Ecology and Conservation (20)
Conservation of colonial waterbird breeding populations often includes restoring historic nesting habitat or establishing new nesting habitat in protected areas. However, colonization of new or restored nesting habitat may be hindered by the lack of social cues from nesting conspecifics to attract prospecting birds. Social attraction, whereby decoys and colony...
Relevance of individual and environmental drivers of movement of Golden Eagles
Maitreyi Sur, Adam E. Duerr, Doug A. Bell, Robert N. Fisher, Jeff A. Tracey, Peter H. Bloom, Trish Miller, Todd E. Katzner
2020, Ibis (162) 381-399
An animal's movement is expected to be governed by an interplay between goals determined by its internal state and energetic costs associated with navigating through the external environment. Understanding this ecological process is challenging when an animal moves in two dimensions and even more difficult for birds that move in...
Genetic mark‐recapture analysis of winter faecal pellets allows estimation of population size in Sage Grouse Centrocercus urophasianus
Jessica E Shyvers, Brett L Walker, Sara J. Oyler-McCance, Jennifer A. Fike, Barry R. Noon
2020, Ibis (162) 749-765
The Sage Grouse Centrocercus urophasianus is a species of conservation concern throughout its range in western North America. Since the 1950s, the high count of males at leks has been used as an index for monitoring populations. However, the relationship between this lek‐count index and population size is unclear,...
Different management strategies are optimal for combating disease in East Texas cave versus culvert hibernating bat populations
Riley Fehr Bernard, Jonah Evans, Nathan W. Fuller, Jonathan D. Reichard, Jeremy T. H. Coleman, Christina J. Kocer, Evan H. Campbell Grant
2020, Conservation Science and Practice (1)
Management decisions for species impacted by emerging infectious diseases are challenging when there are uncertainties in the effectiveness of management actions. Wildlife managers must balance trade‐offs between mitigating the effects of the disease and the associated consequences on other aspects of the managed system. An example of this challenge is...
Global change-driven use of onshore habitat impacts polar bear faecal microbiota
Sophie Watson, Heidi Hauffe, Matthew Bull, Todd C. Atwood, Melissa McKinney, Massimo Pindo, Sarah Perkins
2020, ISME Journal (13) 2916-2926
The gut microbiota plays a critical role in host health, yet remains poorly studied in wild species. Polar bears (Ursus maritimus), key indicators of Arctic ecosystem health and environmental change, are currently affected by rapid shifts in habitat that may alter gut homeostasis. Declining sea ice has led to...
Passive restoration of vegetation and biological soil crusts following 80 years of exclusion from grazing across the Great Basin
Lea A. Condon, Nicole Pietrasiak, Roger Rosentreter, David A. Pyke
2020, Restoration Ecology (28) S75-S85
Restoration targets for biological soil crusts are largely unknown. We surveyed seven 80‐year‐old grazing exclosures across northern Nevada for biocrusts to quantify reference conditions at relatively undisturbed sites. Exclosures were associated with the following plant communities: Wyoming big sagebrush, black sagebrush, and areas co‐dominated by winterfat...
Sampling and analysis frameworks for inference in ecology
Byron K. Williams, Ellie Brown
2020, Methods in Ecology and Evolution (11) 1832-1842
1. Reliable statistical inference is central to ecological research, much of which seeks to estimate population attributes and their interactions. The issue of sampling design and its relationship to inference has become increasingly important due to rapid proliferation of modeling methodology (line transect modeling, capture-recapture, estimation of occurrence, model selection...
Planners tool up for the next big one
Laurie Johnson, Anne M. Wein
2020, Planning (85) 40-44
Data, modeling, risk analysis, and hazard scenario resources can help put earthquake mitigation efforts on firmer ground. Article discusses general earthquake information and findings of the HayWired scenario for a planner audience....
Using carbon isotope ratios to verify predictions of a model simulating the interaction between coastal plant communities and their effect on ground water salinity
Suresh C. Subedi, Leonel Sternberg, Donald L. DeAngelis, Michael S. Ross, Danielle Ogarcak
2020, Ecosystems (23) 570-585
As sea level rises in low-lying coastal islands, salt-tolerant (halophytic) coastal vegetation communities may be able to migrate inland, replacing the freshwater vegetation that is unable to tolerate salt stress. The pace of such shifts may be accelerated by a self-reinforcing feedback between the halophytic vegetation and salinity, as well...
Simplification of polylines by segment collapse: Minimizing areal displacement while preserving area
Barry J. Kronenfeld, Larry Stanislawski, Barbara P. Buttenfield, Tyler Brockmeyer
2020, International Journal of Cartography (6) 22-46
This paper reports on a new Area Preserving Segment Collapse (APSC) algorithm for simplifying polygonal boundaries while preserving polygonal area at simplified target scales and minimizing areal displacement. A general segment collapse algorithm is defined by iteratively collapsing segments to Steiner points in priority order, guided by placement and displacement...
Using full and partial unmixing algorithms to estimate the inundation extent of small, isolated stock ponds in an arid landscape
Christopher Jarchow, Brent H. Sigafus, Erin L. Muths, Blake R. Hossack
2020, Wetlands (40) 563-575
Many natural wetlands around the world have disappeared or been replaced, resulting in the dependence of many wildlife species on small, artificial earthen stock ponds. These ponds provide critical wildlife habitat, such that the accurate detection of water and assessment of inundation extent is required. We applied a full (linear...
Harvest–release decisions in recreational fisheries
Mark A Kaemingk, Keith L. Hurley, Christopher J. Chizinski, Kevin L. Pope
2020, Canadian Journal of Fisheries and Aquatic Sciences (77) 194-201
Most fishery regulations aim to control angler harvest. Yet, we lack a basic understanding of what actually determines the angler’s decision to harvest or release fish caught. We used XGBoost, a machine learning algorithm, to develop a predictive angler harvest–release model by taking advantage of an extensive recreational fishery data...
