The influence of land-cover changes on the variability of saturated hydraulic conductivity in tropical peatlands
James Peterson, Sofyan Kurnianto, John S. Selker, Daniel Murdiyarso, J. Boone Kauffman
2019, Mitigation and Adaption Strategies for Global Change (24) 535-555
Understanding the movement of water through peat is essential for effective conservation and management strategies for peatlands. Saturated hydraulic conductivity, Ks, describes water movement through the peat profile. However, the spatial variability of Ks in tropical peatlands and the effects of land conversion on peat characteristics are poorly understood....
Evaluation of ageing accuracy with complementary non‐lethal methods for slow‐growing, northern populations of shoal bass
James M. Long, C. T. Holley, A. T. Taylor
2019, Fisheries Management and Ecology (25) 150-157
In the upper Chattahoochee River basin, where some populations of shoal bass, Micropterus cataractae Williams & Burgess, are imperilled, age and growth data are lacking. Age and growth of shoal bass in this basin were assessed with non‐lethal means using scales and mark–recapture. Mark–recapture data allowed for estimation of accuracy and determination...
Long-term assessment of ichthyoplankton in a large North American river system reveals changes in fish community dynamics
Taaja R. Tucker, Edward F. Roseman, Robin L. DeBruyne, Jeremy J. Pritt, David Bennion, Darryl W. Hondorp, James C. Boase
2019, Canadian Journal of Fisheries and Aquatic Sciences (75) 2255-2270
Larval fishes are sensitive to abiotic conditions and provide a direct measure of spawning success. The St. Clair – Detroit River System, a Laurentian Great Lakes connecting channel with a history of environmental degradation, has undergone improvements in habitat and water quality since the 1970s. We compared 2006–2015 ichthyoplankton community...
Non-anthropogenic diet-based oiling of predatory birds
Todd E. Katzner, Daniel Driscoll, Ronald E. Jackman, Peter Bloom, Scott Thomas, Jeff Cooper, Stephen J. Livingstone, Teryl Grubb, Jacqueline M. Doyle, Douglas A. Bell, Joseph Didonato, J. Andrew DeWoody
2019, Journal of Raptor Research (52) 82-88
Oiling of wildlife can have important consequences to individual animals and populations (Kingston 2002). Individual birds that are heavily oiled lose their ability to fly and may become ill or die from hypothermia, starvation, exhaustion, or drowning (Clark 1984, Rocke 1999). For example, large-scale oiling from the Exxon Valdez spill...
Evidence of repeated long-distance movements by lake charr Salvelinus namaycush in Lake Huron
Stephen Riley, Tom Binder, Taaja R. Tucker, Charles C. Krueger
2019, Environmental Biology of Fishes (101) 531-545
Movements and dispersal distances of acoustically-tagged adult lake charr Salvelinus namaycush were estimated based on detections at acoustic receivers in Lake Huron during 2010–2014. Most lake charr were detected only at receivers proximate to their release location or were not detected at all, but 3–9% of tagged lake...
Seasonal trophic variation of yellow perch exceeds spatial variation in a large lake basin
Allison R. Hrycik, Paris D. Collingsworth, Mark W. Rogers, Samuel C. Guffey, Tomas O. Hook
2019, Journal of Great Lakes Research (44) 299-310
Trophic structuring of complex food webs may vary at multiple spatial and temporal scales, both in terms of direct trophic connections and underlying energy pathways that support production. In large freshwater systems, the prey and primary producers that support individual higher-order consumers may vary across seasons and habitats due to...
Construction of probabilistic event trees for eruption forecasting at Sinabung volcano, Indonesia 2013–14
Heather M. Wright, John S. Pallister, Wendy A. McCausland, Julia P. Griswold, Supriyati Andreastuti, Agus Budianto, Sofyan Primulyana, Maurizio Battaglia, Angie Diefenbach, John W. Ewert, Peter J. Kelly, Christoph Kern, Martin R. LaFevers, Andrew B. Lockhart, Jeffrey N. Marso, Gari C. Mayberry, Steve P. Schilling, Rick Wessels, Randall A. White, Nurnaning Aisyah, Nugraha Kartadinata, Kristianto, Raditya Putra, Ugan Boyson Saing, Agus Solihin, Yasa Suparman, Devy Damil Syahbana, Hetty Triastuty
2019, Journal of Volcanology and Geothermal Research (382) 233-252
Eruptions of Sinabung volcano, Indonesia have been ongoing since 2013. Since that time, the character of eruptions has changed, from phreatic to phreatomagmatic to magmatic explosive eruptions, and from production of...
Estimating abundance of an open population with an N-mixture model using auxiliary data on animal movements
Alison C. Ketz, Therese L. Johnson, Ryan J. Monello, John A. Mack, Janet L. George, Mevin Hooten, Benjamin R. Kraft, Margaret A. Wild, N. Thompson Hobbs
2019, Ecological Applications (28) 816-825
Accurate assessment of abundance forms a central challenge in population ecology and wildlife management. Many statistical techniques have been developed to estimate population sizes because populations change over time and space and to correct for the bias resulting from animals that are present in a study area but not observed....
Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains
Ottavian Ruesch, Lynnae Quick, Margaret Evelyn Landis, M.M. Sori, O. Cadek, P. Broz, K.A. Otto, Michael T. Bland, S. Byrne, J.C. Castillo-Rogez, H. Hiesinger, R. Jaumann, K. Krohn, L.A. McFadden, A. Nathues, A. Neesemann, F. Preusker, T. Roatsch, P.M. Schenk, J. E. C. Scully, M.V. Sykes, D.A. Williams, C.A. Raymond, C.T. Russell.
2019, Icarus (320) 39-48
Vinalia and Cerealia Faculae are bright and salt-rich localized areas in Occator crater on Ceres. The predominance of the near-infrared signature of sodium carbonate on these surfaces suggests their original material was a brine. Here we analyze Dawn Framing Camera's images and characterize the surfaces as composed of a central...
Phenotypic plasticity and climate change: Can polar bears respond to longer Arctic summers with an adaptive fast?
John P. Whiteman, Henry J. Harlow, George M. Durner, Eric V Regher, Steven C. Amstrup, Merav Ben-David
2019, Oecologia (186) 369-381
Plasticity in the physiological and behavioural responses of animals to prolonged food shortages may determine the persistence of species under climate warming. This is particularly applicable for species that can “adaptively fast” by conserving protein to protect organ function while catabolizing endogenous tissues. Some Ursids, including polar bears (Ursus maritimus),...
Hydrogeologic controls and geochemical indicators of groundwater movement in the Niles Cone and southern East Bay Plain groundwater subbasins, Alameda County, California
Nicholas F. Teague, John A. Izbicki, Jim Borchers, Justin T. Kulongoski, Bryant C. Jurgens
2019, Scientific Investigations Report 2018-5003
Beginning in the 1970s, Alameda County Water District began infiltrating imported water through ponds in repurposed gravel quarries at the Quarry Lakes Regional Park, in the Niles Cone groundwater subbasin, to recharge groundwater and to minimize intrusion of saline, San Francisco Bay water into freshwater aquifers. Hydraulic connection between distinct...
Stream mercury export in response to contemporary timber harvesting methods (Pacific Coastal Mountains, Oregon, USA)
Chris S. Eckley, Collin A. Eagles-Smith, Michael T. Tate, Brandon M Kowalski, Robert Danehy, Sherri L Johnson, David P. Krabbenhoft
2019, Environmental Science & Technology (52) 1971-1980
Land-use activities can alter hydrological and biogeochemical processes that can affect the fate, transformation, and transport of mercury (Hg). Previous studies in boreal forests have shown that forestry operations can have profound, but variable effects on Hg export and methylmercury (MeHg) formation. The Pacific Northwest is an important...
Direct and indirect effects of tides on ecosystem-scale CO2 exchange in a brackish tidal marsh in Northern California
Sara Knox, Lisamarie Windham-Myers, Frank Anderson, Cove Sturtevant, Brian A. Bergamaschi
2019, Journal of Geophysical Research: Biogeosciences (123) 787-806
We investigated the direct and indirect influence of tides on net ecosystem exchange (NEE) of carbon dioxide (CO2) in a temperate brackish tidal marsh. NEE displayed a tidally driven pattern with obvious characteristics at the multiday scale, with greater net CO2uptake during spring tides than neap tides. Based on the...
Isotopic evidence that nitrogen enrichment intensifies nitrogen losses to the atmosphere from subtropical mangroves
Carla Roberta Goncalves Reis, Sasha C. Reed, Rafael Silva Oliveira, Gabriela Bielefeld Nardoto
2019, Ecosystems (22) 1126-1144
Nitrogen (N) enrichment can have large effects on mangroves’ capacity to provide critical ecosystem services by affecting fundamental functions such as N cycling and primary productivity. However, our understanding of excess N input effects on N cycling in mangroves remains quite limited. To advance our understanding of how N enrichment...
Understanding the genetic characteristics of Wild Brook Trout populations in North Carolina thanks to the guidance of Dr. Tim King
David C. Kazyak, Barbara A. Lubinski, Jacob M Rash, Tim L. King
2019, Conference Paper, Proceedings of the Wild Trout XII Symposium
We genotyped 7,588 brook trout representing 406 collections from across the State of North Carolina (Figure 1) at 12 microsatellite loci (King et al. 2012). The vast majority ofcollections appeared to represent single populations, based on general conformance to HardyWeinberg equilibrium and limited evidence for linkage-disequilibrium. Allelic diversity was low to moderate...
Monitoring and conservation of Japanese Murrelets and related seabirds in Japan
John F. Piatt, S Kim Nelson, Harry R. Carter
2019, Conference Paper, Status and Monitoring of Rare and Threatened Japanese Crested Murrelet
Of the 24 species in the Auk (or Alcidae) family of seabirds living in the northern hemisphere, 22 reside within the North Pacific Ocean. These “penguins of the north” use their small wings to “fly” underwater, some to more than 200 meters, where they catch and eat a variety of small fish...
Remaining populations of an upland stream fish persist in refugia defined by habitat features at multiple scales
Corey G. Dunn, Paul L. Angermeier
2019, Diversity and Distributions (25) 385-399
AimConserving stream biota could require strategies that preserve habitats conveying resistance to ecological impacts of changing land use and climate. Retrospective analyses of species’ responses to anthropogenic disturbances can inform such strategies. We developed a hierarchical framework to contrast environmental conditions underlying persistence versus extirpation of an...
Fena Valley Reservoir watershed and water-balance model updates and expansion of watershed modeling to southern Guam
Sarah N. Rosa, Lauren E. Hay
2019, Scientific Investigations Report 2017-5093
In 2014, the U.S. Geological Survey, in cooperation with the U.S. Department of Defense’s Strategic Environmental Research and Development Program, initiated a project to evaluate the potential impacts of projected climate-change on Department of Defense installations that rely on Guam’s water resources. A major task of that project was to...
Spatial autoregressive models for statistical inference from ecological data
Jay M. Ver Hoef, Erin E. Peterson, Mevin Hooten, Ephraim M. Hanks, Marie-Josée Fortin
2019, Ecological Monographs (88) 36-59
Ecological data often exhibit spatial pattern, which can be modeled as autocorrelation. Conditional autoregressive (CAR) and simultaneous autoregressive (SAR) models are network‐based models (also known as graphical models) specifically designed to model spatially autocorrelated data based on neighborhood relationships. We identify and discuss six different types...
The impact of late Holocene land-use change, climate variability, and sea-level rise on carbon storage in tidal freshwater wetlands on the southeastern United States Coastal Plain
Miriam Jones, Christopher E. Bernhardt, K. W. Krauss, Gregory E. Noe
2019, Journal of Geophysical Research: Biogeosciences (122) 3126-3141
This study examines Holocene impacts of changes in climate, land use, and sea-level rise (SLR) on sediment accretion, carbon accumulation rates (CAR), and vegetation along a transect of tidal freshwater forested wetlands (TFFW) to oligohaline marsh along the Waccamaw River, South Carolina (4 sites) and along the Savannah River, Georgia...
Exploring the historical earthquakes preceding the giant 1960 Chile earthquake in a time‐dependent seismogenic zone
M. Cisternas, M. Carvajal, Robert L. Wesson, L.L Ely, N Gorigoitia
2019, Bulletin of the Seismological Society of America (107) 2664-2675
New documentary findings and available paleoseismological evidence provide both new insights into the historical seismic sequence that ended with the giant 1960 south-central Chile earthquake and relevant information about the region’s seismogenic zone. According to the few available written records, this region was previously struck by earthquakes of varying size...
The role of baseflow in dissolved solids delivery to streams in the Upper Colorado River Basin
Christine Rumsey, Matthew P. Miller, Gregory E. Schwarz, Robert M. Hirsch, David D. Susong
Gregory Schwarz, Robert M. Hirsch, David Susong, editor(s)
2019, Hydrological Processes (31) 4705-4718
Salinity has a major effect on water users in the Colorado River Basin, estimated to cause almost $300 million per year in economic damages. The Colorado River Basin Salinity Control Program implements and manages projects to reduce salinity loads, investing millions of dollars per year in irrigation...
Nominal 30-m cropland extent map of continental Africa by integrating pixel-based and object-based algorithms using Sentinel-2 and Landsat-8 Data on Google Earth Engine
Jun Xiong, Prasad S. Thenkabail, James C. Tilton, Murali Krishna Gumma, Pardhasaradhi G. Teluguntla, Adam Oliphant, Russell G. Congalton, Kamini Yadav, Noel Gorelick
2019, Remote Sensing (9)
A satellite-derived cropland extent map at high spatial resolution (30-m or better) is a must for food and water security analysis. Precise and accurate global cropland extent maps, indicating cropland and non-cropland areas, are starting points to develop higher-level products such as crop watering methods (irrigated or rainfed), cropping intensities...
Twenty years (1990–2010) of geodetic monitoring of Galeras volcano (Colombia) from continuous tilt measurements.
Lourdes Narvaez Medina, Dario F Arcos, Maurizio Battaglia
2019, Journal of Volcanology and Geothermal Research (344) 232-245
Galeras - an andesitic stratovolcano part of the Galeras Volcanic Complex - is one of the most active volcanoes in Colombia. Historic activity is centered on a small-volume cone inside the youngest amphitheater, which breaches the west flank of the volcano. At least 30 confirmed eruption periods have been recorded...
MODIS phenology-derived, multi-year distribution of conterminous U.S. crop types
Richard Massey, T.T Sankey, Russ Congalton, Kamini Yadav, Prasad Thenkabail, Mutlu Ozdogan, Sanchez Meador
2019, Remote Sensing of Environment (198) 490-503
Innovative, open, and rapid methods to map crop types over large areas are needed for long-term cropland monitoring. We developed two novel and automated decision tree classification approaches to map crop types across the conterminous United States (U.S.) using MODIS 250 m resolution data:...
