Nutrient and algal responses to winterkilled fish-derived nutrient subsidies in eutrophic lakes
Casey W. Schoenebeck, Michael L. Brown, Steven R. Chipps, David German
2012, Lake and Reservoir Management (28) 189-199
Fishes inhabiting shallow, glacial lakes of the Prairie Pothole Region in the United States and Canada periodically experience hypoxia in severe winters that can lead to extensive fish mortality resulting in high biomasses of dead fish. However, the role of carcass-derived nutrient subsidies in shallow, eutrophic lakes translocated to pelagic...
History of land cover mapping
Thomas R. Loveland
Chandra P. Giri, editor(s)
2012, Book chapter, Remote sensing of land use and land cover: Principles and applications
The historical roots of land-cover mapping reside in the early history of aerial photography and applications spanning forestry, agriculture, urban planning, and water-resources management. Considering this long span of mapping, any attempt to provide an exhaustive treatment of the full history of land-cover mapping will necessarily be incomplete. For that...
Has the magnitude of floods across the USA changed with global CO2 levels?
Robert M. Hirsch, Karen R. Ryberg
2012, Hydrological Sciences Journal (57) 1-9
Statistical relationships between annual floods at 200 long-term (85–127 years of record) streamgauges in the coterminous United States and the global mean carbon dioxide concentration (GMCO2) record are explored. The streamgauge locations are limited to those with little or no regulation or urban development. The coterminous US is divided into...
GRACEnet: addressing policy needs through coordinated cross-location research
Michael D. Jawson, Charles W. Walthall, Steven R. Shafer
Mark Liebig, Alan J. Franzluebbers, Ronald F. Follett, editor(s)
2012, Book chapter, Managing agricultural greenhouse gases coordinated agricultural research through GRACEnet to address our changing climate
GRACEnet (Greenhouse gas Reduction through Agricultural Carbon Enhancement network) was conceived to build upon ongoing USDA Agricultural Research Service (ARS) research to improve soil productivity, while addressing the challenges and opportunities of interest in C sequestration from a climate change perspective. The vision for GRACEnet was and remains: Knowledge and...
Microsatellite genetic diversity and differentiation of native and introduced grass carp populations in three continents
Duane Chapman, Q. Chen, Chenghui Wang, Jinlian Zhao, Guoqing Lu, Jeney Zsigmond, Si-Fa Li
2012, Genetica (140) 115-123
Grass carp (Ctenopharyngodon idella), a freshwater species native to China, has been introduced to about 100 countries/regions and poses both biological and environmental challenges to the receiving ecosystems. In this study, we analyzed genetic variation in grass carp from three introduced river systems (Mississippi River Basin in US,...
Exploring similarities among many species distributions
Scott Simmerman, Jingyuan Wang, James Osborne, Kimberly Shook, Jia Hu, William Godsoe, Theodore R. Simons
2012, Conference Paper, Proceedings of the 1st Conference of the Extreme Science and Engineering Discovery Environment: Bridging from the eXtreme to the campus and beyond
Collecting species presence data and then building models to predict species distribution has been long practiced in the field of ecology for the purpose of improving our understanding of species relationships with each other and with the environment. Due to limitations of computing power as well as limited means of...
Groundwater and surface-water exchange and resultingnNitrate dynamics in the Bogue Phalia Basin in northwestern Mississippi
Jeannie R. B. Barlow, Richard H. Coupe
2012, Journal of Environmental Quality (41) 155-169
During April 2007 through September 2008, the USGS collected hydrogeologic and water-quality data from a site on the Bogue Phalia to evaluate the role of groundwater and surface-water interaction on the transport of nitrate to the shallow sand and gravel aquifer underlying the Mississippi Alluvial Plain in northwestern Mississippi. A...
Stress imparted by the great 2004 Sumatra earthquake shut down transforms and activated rifts up to 400 km away in the Andaman Sea
Volkan Sevilgen, Ross S. Stein, Fred F. Pollitz
2012, Proceedings of the National Academy of Sciences of the United States of America (109) 15152-15156
The origin and prevalence of triggered seismicity and remote aftershocks are under debate. As a result, they have been excluded from probabilistic seismic hazard assessment and aftershock hazard notices. The 2004 M = 9.2 Sumatra earthquake altered seismicity in the Andaman backarc rift-transform system. Here we show that over a 300-km-long largely...
ViscoSim Earthquake Simulator
Frederick Pollitz
2012, Seismological Research Letters (83) 979-982
Synthetic seismicity simulations have been explored by the Southern California Earthquake Center (SCEC) Earthquake Simulators Group in order to guide long‐term forecasting efforts related to the Unified California Earthquake Rupture Forecast (Tullis et al., 2012a). In this study I describe the viscoelastic earthquake simulator (ViscoSim) of Pollitz, 2009. Recapitulating...
Habitat and prey availability attributes associated with juvenile and early adult pallid sturgeon occurrence in the Missouri River, USA
Bryan D. Spindler, Steven R. Chipps, Robert A. Klumb, Brian D. S. Graeb, Michael C. Wimberly
2012, Endangered Species Research (16) 225-234
The pallid sturgeon Scaphirhynchus albus is a federally endangered species native to the Missouri and lower Mississippi Rivers, USA. As part of recovery efforts, over 360000 pallid sturgeon have been stocked into the Missouri River since 1994, and a standardized, long-term monitoring program was initiated in 2003. Understanding the distribution...
An application and extension of the constraints–effects–mitigation model to Minnesota waterfowl hunting
Susan A. Schroeder, David C. Fulton, Jeffrey S. Lawrence, Steven D. Cordts
2012, Human Dimensions of Wildlife (17) 174-192
This study extends modeling work on the leisure constraint negotiation process from physically active leisure and celebrity fandom to hunting. We test a model derived from the constraints–effects–mitigation model of leisure participation. The model is examined in the context of continued Minnesota waterfowl hunting among a sample of Minnesota residents...
Climate-change-driven deterioration of water quality in a mineralized watershed
Andrew Todd, Andrew H. Manning, Philip L. Verplanck, Caitlin Crouch, Diane M. McKnight, Ryan Dunham
2012, Environmental Science & Technology (46) 9324-9332
A unique 30-year streamwater chemistry data set from a mineralized alpine watershed with naturally acidic, metal-rich water displays dissolved concentrations of Zn and other metals of ecological concern increasing by 100–400% (400–2000 μg/L) during low-flow months, when metal concentrations are highest. SO4 and other major ions show similar increases. A lack...
Adding the ocean to the study of seabirds: A brief history of at-sea seabird research
David G. Ainley, Christine A. Ribic, Eric J. Woehler
2012, Marine Ecology Progress Series (451) 231-243
We review the history of how research directed towards marine ornithology has led to an appreciation of seabirds as highly specialized marine organisms. Beginning with R. C. Murphy (Pacific), V. C. Wynne-Edwards (Atlantic), and associates in the early 1900s, the research approach grew from an emphasis on seabird single-species ecology...
Spatial analysis of geologic and hydrologic features relating to sinkhole occurrence in Jefferson County, West Virginia
Daniel H. Doctor, Katarina Z. Doctor
2012, Carbonates and Evaporites (27) 143-152
In this study the influence of geologic features related to sinkhole susceptibility was analyzed and the results were mapped for the region of Jefferson County, West Virginia. A model of sinkhole density was constructed using Geographically Weighted Regression (GWR) that estimated the relations among discrete geologic or hydrologic features and...
The 2010 explosive eruption of Java's Merapi volcano—A ‘100-year’ event
Surono, Philippe Jousset, John S. Pallister, Marie Boichu, M. Fabrizia Buongiorno, Agus Budisantoso, Fidel Costa, Supriyati Andreastuti, Fred Prata, David J. Schneider, Lieven Clarisse, Hanik Humaida, Sri Sumarti, Christian Bignami, Julia P. Griswold, Simon A. Carn, Clive Oppenheimer, Franck Lavigne
2012, Journal of Volcanology and Geothermal Research (241-242) 121-135
Merapi volcano (Indonesia) is one of the most active and hazardous volcanoes in the world. It is known for frequent small to moderate eruptions, pyroclastic flows produced by lava dome collapse, and the large population settled on and around the flanks of the volcano that is at risk. Its usual...
Gulf Coast Ecosystem Restoration Task Force---Gulf of Mexico Ecosystem Science Assessment and Needs
Shelby Walker, Alyssa M. Dausman, Dawn L. Lavoie, editor(s)
2012, Report
The Gulf Coast Ecosystem Restoration Task Force (GCERTF) was established by Executive Order 13554 as a result of recommendations from “America’s Gulf Coast: A Long-term Recovery Plan after the Deepwater Horizon Oil Spill” by Secretary of the Navy Ray Mabus (Mabus Report). The GCERTF consists of members from 11 Federal...
Airborne electromagnetic imaging of discontinuous permafrost
B. J. Minsley, J.D. Abraham, B. D. Smith, J. C. Cannia, C.I. Voss, M.T. Jorgenson, Michelle Ann Walvoord, B.K. Wylie, L. Anderson, L.B. Ball, M. Deszcz-Pan, T.P. Wellman, T. A. Ager
2012, Geophysical Research Letters (39) 1-8
The evolution of permafrost in cold regions is inextricably connected to hydrogeologic processes, climate, and ecosystems. Permafrost thawing has been linked to changes in wetland and lake areas, alteration of the groundwater contribution to streamflow, carbon release, and increased fire frequency. But detailed knowledge about the dynamic state of permafrost...
The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: Two new species of Ramphotyphlops from the Caroline Islands
A.H. Wynn, R.P. Reynolds, D.W. Buden, M. Falanruw, B. Lynch
2012, Zootaxa 39-54
Two new blind snakes in the genus Ramphotyphlops are described from Ulithi (R. hatmaliyeb sp. nov.) and Ant Atoll (R. adocetus sp. nov.) in the Caroline Islands, the first blind snake species known from Micronesia east of Palau (excluding Ramphotyphlops braminus). Both species are unusual in being known only from...
A plant distribution shift: temperature, drought or past disturbance?
Dylan W. Schwilk, Jon E. Keeley
2012, PLoS ONE (7)
Simple models of plant response to warming climates predict vegetation moving to cooler and/or wetter locations: in mountainous regions shifting upslope. However, species-specific responses to climate change are likely to be much more complex. We re-examined a recently reported vegetation shift in the Santa Rosa Mountains, California, to better understand...
Oxygen and sulfur isotope systematics of sulfate produced during abiotic and bacterial oxidation of sphalerite and elemental sulfur
N. Balci, B. Mayer, W. C. Pat Shanks III, K.W. Mandernack
2012, Geochimica et Cosmochimica Acta (77) 335-351
Studies of metal sulfide oxidation in acid mine drainage (AMD) systems have primarily focused on pyrite oxidation, although acid soluble sulfides (e.g., ZnS) are predominantly responsible for the release of toxic metals. We conducted a series of biological and abiotic laboratory oxidation experiments with pure and Fe-bearing sphalerite (ZnS &...
A spatial cluster analysis of tractor overturns in Kentucky from 1960 to 2002
D.M. Saman, H.P. Cole, A. Odoi, M.L. Myers, D.I. Carey, S.C. Westneat
2012, PLoS ONE (7)
Background:Agricultural tractor overturns without rollover protective structures are the leading cause of farm fatalities in the United States. To our knowledge, no studies have incorporated the spatial scan statistic in identifying high-risk areas for tractor overturns. The aim of this study was to determine whether tractor overturns cluster in certain...
Thinning of young Douglas-fir forests decreases density of northern flying squirrels in the Oregon Cascades
Tom Manning, Joan C. Hagar, Brenda C. McComb
2012, Forest Ecology and Management (264) 115-124
Large-scale commercial thinning of young forests in the Pacific Northwest is currently promoted on public lands to accelerate the development of late-seral forest structure for the benefit of wildlife species such as northern spotted owls (Strix occidentalis caurina) and their prey, including the northern flying squirrel (Glaucomys sabrinus). Attempts to...
Verifiable metamodels for nitrate losses to drains and groundwater in the Corn Belt, USA
Bernard T. Nolan, Robert W. Malone, Jo Ann M. Gronberg, K.R. Thorp, Liwang Ma
2012, Environmental Science & Technology (46) 901-908
Nitrate leaching in the unsaturated zone poses a risk to groundwater, whereas nitrate in tile drainage is conveyed directly to streams. We developed metamodels (MMs) consisting of artificial neural networks to simplify and upscale mechanistic fate and transport models for prediction of nitrate losses by drains and leaching in the...
Landscape controls on the timing of spring, autumn, and growing season length in mid-Atlantic forests
A.J. Elmore, S.M. Guinn, B. J. Minsley, A.D. Richardson
2012, Global Change Biology (18) 656-674
The timing of spring leaf development, trajectories of summer leaf area, and the timing of autumn senescence have profound impacts to the water, carbon, and energy balance of ecosystems, and are likely influenced by global climate change. Limited field-based and remote-sensing observations have suggested complex spatial patterns related to geographic...
Climatic forcing of Quaternary deep-sea benthic communities in the North Pacific Ocean
Moriaki Yasuhara, G. Hunt, T. M. Cronin, N. Hokanishi, H. Kawahata, Akira Tsujimoto, M. Ishitake
2012, Paleobiology (38) 162-179
There is growing evidence that changes in deep-sea benthic ecosystems are modulated by climate changes, but most evidence to date comes from the North Atlantic Ocean. Here we analyze new ostracod and published foraminiferal records for the last 250,000 years on Shatsky Rise in the North Pacific Ocean. Using linear...
