Juvenile Sandhill Cranes exhibit wider ranging and more exploratory movements than adults during the breeding season
David W. Wolfson, John R. Fieberg, David E. Andersen
2020, Ibis (162) 556-562
Sandhill Cranes Antigone canadensis exhibit delayed sexual maturity and breeding, and therefore juvenile Cranes searching for suitable territories to occupy have different ecological constraints on movements than adults, which must defend a territory and raise young. We used fine-scale GPS telemetry data to characterize and compare movements of adult and juvenile Cranes...
Framework for monitoring shrubland community integrity in California Mediterranean type ecosystems: Information for policy makers and land managers
Dawn M. Lawson, Jon Keeley
2020, Conservation Science and Practice (1)
Shrublands in Mediterranean‐type ecosystems worldwide support important ecosystem services including high levels of biodiversity and are threatened by multiple factors in heavily used landscapes. Use, conservation, and management of these landscapes involve diverse stakeholders, making decision processes complex. To be effective, management and land use decisions should be informed by...
The long-term effects of Hurricanes Wilma and Irma on soil elevation change in Everglades mangrove forests
Laura Feher, Michael Osland, Gordon Anderson, William Vervaeke, Ken Krauss, Kevin R. T. Whelan, Karen M. Balentine, Ginger Tiling-Range, Thomas J. Smith, Donald R. Cahoon
2020, Ecosystems (23) 917-931
Mangrove forests in the Florida Everglades (USA) are frequently affected by hurricanes that produce high-velocity winds, storm surge, and extreme rainfall, but also provide sediment subsidies that help mangroves adjust to sea-level rise. The long-term influence of hurricane sediment inputs on soil elevation dynamics in mangrove forests are not well...
An integrative GIS approach to analyzing the impacts of septic systems on the coast of Florida, USA
Kyle Flanagan, Barnali Dixon, Tess Rivenbark, Dale W. Griffin
2020, Physical Geography (41) 407-432
An estimated 2.7 million septic systems in Florida, USA are potential ground and surface water contaminant sources that may affect environmental and human health. This study examined the spatial distribution of septic systems, coastal surface water contamination, and related environmental factors of coastal Florida watersheds at the 8-digit hydrologic unit...
Designing flows to enhance ecosystem functioning in heavily altered rivers
Kevin R. Bestgen, N. LeRoy Poff, Daniel W Baker, Brian P. Bledsoe, David M. Merritt, Mark Lorie, Gregor T. Auble, John S. Sanderson, Boris C. Kondratieff
2020, Ecological Applications (30)
More than a century of dam construction and water development in the western United States has led to extensive ecological alteration of rivers. Growing interest in improving river function is compelling practitioners to consider ecological restoration when managing dams and water extraction. We developed an Ecological Response Model (ERM) for...
Apatite trace element geochemistry and cathodoluminescent textures—Acomparison between regional magmatism and the Pea Ridge IOA-REE andBoss IOCG deposits, southeastern Missouri iron metallogenic province, USA
Celestine N. Mercer, Kathryn E. Watts, Juliane Gross
2020, Ore Geology Reviews (116)
The southeast Missouri iron metallogenic province contains a remarkable wealth of historically important Fe, Cu, Au, and rare earth element (REE) deposits including the Pea Ridge iron oxide-apatite-rare earth element (IOA-REE) deposit and the Boss iron oxide-copper-gold (IOCG) deposit. These deposits are coeval with silicic and intermediate composition magmatism in...
Late Quaternary sea-level history of Saipan, Commonwealth of the Northern Mariana Islands, USA: A test of tectonic uplift and glacial isostatic adjustment models
Daniel R. Muhs, Eugene S. Schweig, Kathleen R. Simmons
2020, Geological Society of America Bulletin (132) 863-883
In 1979, S. Uyeda and H. Kanamori proposed a tectonic model with two end members of a subduction-boundary continuum: the “Chilean” type (shallow dip of the subducting plate, great thrust events, compression, and uplift of the overriding plate) and a “Mariana” type (steep dip of the subducting plate, no great...
Winter climate change and the poleward range expansion of a tropical invasive tree (Brazilian pepper ‐ Shinus terebinthifolius)
Michael Osland, Laura Feher
2020, Global Change Biology (26) 607-615
Winter climate change is expected to lead to the tropicalization of temperate ecosystems, where tropical species expand poleward in response to a decrease in the intensity and duration of winter temperature extremes (i.e., freeze events). In the southeastern United States, freezing temperatures control the northern range limits of many invasive...
Local abundance of Ixodes scapularis in forests: Effects of environmental moisture, vegetation characteristics, and host abundance
Howard S. Ginsberg, Eric L. Rulison, Jasmine L. Miller, Genevieve Pang, Isis M. Arsnoe, Graham J. Hickling, Nicholas H. Ogden, Roger A. LeBrun, Jean I. Tsao
2020, Ticks and Tick-borne Diseases (11)
Ixodes scapularis is the primary vector of Lyme disease spirochetes in eastern and central North America, and local densities of this tick can affect human disease risk. We sampled larvae and nymphs from sites in Massachusetts and Wisconsin, USA, using flag/drag devices and by collecting ticks from hosts, and measured environmental...
Geoacoustic inversion for a New England mud patch sediment using the silt-suspension theory of marine mud
Elisabeth M. Brown, Ying-Tsong Lin, Jason Chaytor, William L. Siegmann
2020, IEEE Journal of Oceanic Engineering (45) 144-160
This article provides an application of the silt-suspension theory to a Bayesian-inference inversion for the geo-acoustic parameters in marine mud. The theory, with consequences that have been developed recently, postulates a suspension of water and clay mineral card-houses that supports moderately dilute concentrations of silt particles. The approach is an...
Historical changes in fish communities in urban streams of the southeastern U.S. and the relative importance of water-quality stressors
Michael R. Meador
2020, Ecology of Freshwater Fish (29) 156-169
A total of 71 stream sites representing a gradient of urban land use was sampled across the Piedmont of the southeastern U.S. in 2014. Fish data collected (observed) at each site were compared to an expected community based on georeferenced historical (~1950 - ~1990) species occurrence records for stream...
Regional Global Navigation Satellite System networks for crustal deformation monitoring
Jessica R. Murray, Noel Bartlow, Yehuda Bock, Benjamin A. Brooks, James H. Foster, Jeffery T. Freymueller, William C. Hammond, Kathleen Hodgkinson, Ingrid A. Johanson, Alberto Lopez-Venegas, Doerte Mann, Glen Mattioli, Timothy Melbourne, David Mencin, Emily K. Montgomery-Brown, Mark Hunter Murray, Robert Smalley Jr., Valerie Thomas
2020, Seismological Research Letters (91) 552-572
Regional networks of Global Navigation Satellite System (GNSS) stations cover seismically and volcanically active areas throughout the United States. Data from these networks have been used to produce high‐precision, three‐component velocity fields covering broad geographic regions as well as position time series that track time‐varying crustal deformation. This information has...
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...
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...
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...
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...
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,...
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...
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...
In situ measurements of compressional wave speed during gravity coring operations in the New England mud patch
Megan S. Ballard, Kevin M. Lee, Andrew R. McNeese, Preston S. Wilson, Jason Chaytor, John A. Goff, Allen H. Reed
2020, IEEE Journal of Oceanic Engineering (45) 26-38
This paper presents measurements of sediment sound-speed profiles measured in situ using the acoustic coring system (ACS). The reported measurements were obtained from seven gravity cores collected in the New England Mud Patch. The ACS uses two sets of transducers mounted below the penetrating tip of a sediment corer to...
Connectivity in the Crown: Highway 2 wildlife crossings
John S. Waller, Tabitha A. Graves, Brad Anderson, Brandon Kittson, Sarah Mccrimmon Gaulke
2020, Report
This report summarizes data collected to inform decisions on how to best mitigate the effects on wildlife migration from increasing traffic, development, and recreation along US highway 2. The highway, railway, and river split the Crown of the Continent Ecosystem. This data addresses SO 3362 by providing information...
Shear velocity structure from ambient noise and teleseismic surface wave tomography in the Cascades around Mount St. Helens
Kayla Crosbie, Geoff A. Abers, Michael Everett Mann, Helen A. Janiszewski, Kenneth C Creager, Carl W Ulberg, Seth C. Moran
2020, Journal of Geophysical Research (124) 8358-8375
Mount St. Helens (MSH) lies in the forearc of the Cascades where conditions should be too cold for volcanism. To better understand thermal conditions and magma pathways beneath MSH, data from a dense broadband array are used to produce high‐resolution tomographic images of the crust and upper mantle. Rayleigh‐wave phase‐velocity...
