Monitoring and inversion on land subsidence over mining area with InSAR technique
Y. Wang, Q. Zhang, C. Zhao, Z. Lu, X. Ding
2011, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Wulanmulun town, located in Inner Mongolia, is one of the main mining areas of Shendong Company such as Shangwan coal mine and Bulianta coal mine, which has been suffering serious mine collapse with the underground mine withdrawal. We use ALOS/PALSAR data to extract land deformation under these regions, in...
Forecasting carbon budget under climate change and CO 2 fertilization for subtropical region in China using integrated biosphere simulator (IBIS) model
Q. Zhu, H. Jiang, J. Liu, C. Peng, X. Fang, S. Yu, G. Zhou, X. Wei, W. Ju
2011, Polish Journal of Ecology (59) 3-24
The regional carbon budget of the climatic transition zone may be very sensitive to climate change and increasing atmospheric CO 2 concentrations. This study simulated the carbon cycles under these changes using process-based ecosystem models. The Integrated Biosphere Simulator (IBIS), a Dynamic Global Vegetation Model (DGVM), was used to evaluate...
Nest-site fidelity and dispersal of Gyrfalcons estimated by noninvasive genetic sampling
Travis L. Booms, Sandra L. Talbot, George K. Sage, Brian J. McCaffery, Kevin G. McCracken, Philip F. Schempf
2011, Conference Paper, Condor
We used feathers from adult Gyrfalcons (Falco rusticolus) molted in breeding territories and blood samples from nestlings to document nest-site fidelity and dispersal of breeding adults and juveniles at three areas 100- 350 km apart in Yukon Delta National Wildlife Refuge, Alaska, 2003-2007. We used genotypes from seven polymorphic microsatellite...
A heuristic simulation model of Lake Ontario circulation and mass balance transport
J.E. McKenna Jr., M.A. Chalupnicki
2011, Journal of Freshwater Ecology (26) 123-132
The redistribution of suspended organisms and materials by large-scale currents is part of natural ecological processes in large aquatic systems but can contribute to ecosystem disruption when exotic elements are introduced into the system. Toxic compounds and planktonic organisms spend various lengths of time in suspension before settling to the...
Daily movements of female mallards wintering in Southwestern Louisiana
Paul T. Link, Alan D. Afton, Robert R. Cox Jr., Bruce E. Davis
2011, Waterbirds (34) 422-428
Understanding daily movements of waterfowl is crucial to management of winter habitats, especially along the Gulf Coast where hunting pressure is high. Radio-telemetry was used to investigate movements of female Mallards (Anas platyrchychos) wintering in southwestern Louisiana. Movement distances were analyzed from 2,455 paired locations (diurnal and nocturnal) of 126...
Episodic soil succession on basaltic lava fields in a cool, dry environment
K.L. Vaughan, P.A. McDaniel, W.M. Phillips
2011, Soil Science Society of America Journal (75) 1462-1470
Holocene- to late Pleistocene-aged lava flows at Craters of the Moon National Monument and Preserve provide an ideal setting to examine the early stages of soil formation under cool, dry conditions. Transects were used to characterize the amount and nature of soil cover on across basaltic lava flows ranging in...
Experimental infection of bats with Geomyces destructans causes white-nose syndrome
J.M. Lorch, C.U. Meteyer, M.J. Behr, J.G. Boyles, P.M. Cryan, A.C. Hicks, A.E. Ballmann, J.T.H. Coleman, D.N. Redell, D.M. Reeder, D.S. Blehert
2011, Nature (480) 376-378
White-nose syndrome (WNS) has caused recent catastrophic declines among multiple species of bats in eastern North America. The disease's name derives from a visually apparent white growth of the newly discovered fungus Geomyces destructans on the skin (including the muzzle) of hibernating bats. Colonization of skin by this fungus is...
Seasonal timing of first rain storms affects rare plant population dynamics
J.M. Levine, A. K. McEachern, C. Cowan
2011, Ecology (92) 2236-2247
A major challenge in forecasting the ecological consequences of climate change is understanding the relative importance of changes to mean conditions vs. changes to discrete climatic events, such as storms, frosts, or droughts. Here we show that the first major storm of the growing season strongly influences the population dynamics...
Late Pleistocene dune activity in the central Great Plains, USA
J.A. Mason, J. B. Swinehart, P.R. Hanson, D.B. Loope, R.J. Goble, X. Miao, R.L. Schmeisser
2011, Quaternary Science Reviews (30) 3858-3870
Stabilized dunes of the central Great Plains, especially the megabarchans and large barchanoid ridges of the Nebraska Sand Hills, provide dramatic evidence of late Quaternary environmental change. Episodic Holocene dune activity in this region is now well-documented, but Late Pleistocene dune mobility has remained poorly documented, despite early interpretations of...
Constraints on mechanisms for the growth of gully alcoves in Gasa crater, Mars, from two-dimensional stability assessments of rock slopes
C.H. Okubo, L.L. Tornabene, N.L. Lanza
2011, Icarus (211) 207-221
The value of slope stability analyses for gaining insight into the geologic conditions that would facilitate the growth of gully alcoves on Mars is demonstrated in Gasa crater. Two-dimensional limit equilibrium methods are used in conjunction with high-resolution topography derived from stereo High Resolution Imaging Science Experiment (HiRISE) imagery. These...
Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region
A.C. Seitz, Timothy Loher, Brenda L. Norcross, Jennifer L. Nielsen
2011, Aquatic Biology (12) 225-239
Currently, it is assumed that eastern Pacific halibut Hippoglossus stenolepis belong to a single, fully mixed population extending from California through the Bering Sea, in which adult halibut disperse randomly throughout their range during their lifetime. However, we hypothesize that halibut dispersal is more complex than currently assumed and is not spatially...
Trophic connections in Lake Superior Part II: the nearshore fish community
A.E. Gamble, T.R. Hrabik, D.L. Yule, J.D. Stockwell
2011, Journal of Great Lakes Research (37) 550-560
We use detailed diet analyses of the predominant planktivorous, benthivorous and piscivorous fish species from Lake Superior to create a nearshore (bathymetric depths < 80 m) fish community food web. The food web was based on analysis of 5125 fish stomachs collected seasonally (spring, summer, fall) from 9 nearshore sites...
Natural radium and radon tracers to quantify water exchange and movement in reservoirs
Christopher G. Smith
Mark Baskaran, editor(s)
2011, Book chapter, Handbook of environmental isotope geochemistry
Radon and radium isotopes are routinely used to quantify exchange rates between different hydrologic reservoirs. Since their recognition as oceanic tracers in the 1960s, both radon and radium have been used to examine processes such as air-sea exchange, deep oceanic mixing, benthic inputs, and many others. Recently, the application of...
Effects of model layer simplification using composite hydraulic properties
Eve L. Kuniansky, Nicasio Sepulveda
Lakshmanan Elango, editor(s)
2011, Book chapter, Hydraulic conductivity: Issues, determination and applications
Groundwater provides much of the fresh drinking water to more than 1.5 billion people in the world (Clarke et al., 1996) and in the United States more that 50 percent of citizens rely on groundwater for drinking water (Solley et al., 1998). As aquifer systems are developed for water supply,...
Overview of prohibited and permitted plant regulatory listing systems
Randy G. Westbrooks, Alan V. Tasker
2011, Book chapter, Invasive plant management issues and challenges in the United States: 2011 Overview
Pest risk analysis is a process that evaluates the risks involved with a proposed species to help determine whether it should be permitted or denied entry into a country, and how the risks could be managed if it is imported. The prohibited listing approach was developed in the late 1800s...
Swallows as a sentinel species for contaminant exposure and effect studies
Christine M. Custer
John G. Elliott, Christine Annette Bishop, Christy A. Morrissey, editor(s)
2011, Book chapter, Wildlife ecotoxicology: Forensic approaches
Tree swallows are an important model species to study the effects of contaminants in wild bird populations and have been used extensively in studies across North America. The advantages of swallows compared to other avian species are detailed. Three case histories are provided where swallows have been successfully used in...
Modifications to existing ground-motion prediction equations in light of new data
G. M. Atkinson, D.M. Boore
2011, Bulletin of the Seismological Society of America (101) 1121-1135
We compare our recent ground-motion prediction equations (GMPEs) for western North America (WNA; Boore and Atkinson, 2008 [BA08]) and eastern North America (ENA; Atkinson and Boore, 2006 [AB06]; Atkinson, 2008 [A08]) to newly available ground-motion data. Based on these comparisons, we suggest revisions to our GMPEs for both WNA and...
Responses of ecosystem carbon cycling to climate change treatments along an elevation gradient
Zhuoting Wu, George W. Koch, Paul Dijkstra, Matthew A. Bowker, Bruce A. Hungate
2011, Ecosystems (14) 1066-1080
Global temperature increases and precipitation changes are both expected to alter ecosystem carbon (C) cycling. We tested responses of ecosystem C cycling to simulated climate change using field manipulations of temperature and precipitation across a range of grass-dominated ecosystems along an elevation gradient in northern Arizona. In 2002, we transplanted...
Stratigraphy and chronology of offshore to nearshore deposits associated with the Provo shoreline, Pleistocene Lake Bonneville, Utah
H.S. Godsey, Charles G. Oviatt, D. M. Miller, M.A. Chan
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (310) 442-450
Stratigraphic descriptions and radiocarbon data from eleven field locations are presented in this paper to establish a chronostratigraphic framework for offshore to nearshore deposits of Lake Bonneville. Based on key marker beds and geomorphic position, the deposits are interpreted to have accumulated during the period from the late transgressive phase,...
Short-term sandbar variability based on video imagery: Comparison between Time-Average and Time-Variance techniques
R.M.C. Guedes, L.J. Calliari, K. T. Holland, N.G. Plant, P.S. Pereira, F.N.A. Alves
2011, Marine Geology (289) 122-134
Time–exposure intensity (averaged) images are commonly used to locate the nearshore sandbar position (xb), based on the cross-shore locations of maximum pixel intensity (xi) of the bright bands in the images. It is not known, however, how the breaking patterns seen in Variance images (i.e. those created through standard deviation of pixel intensity...
In situ rates of sulfate reduction in response to geochemical perturbations
T.A. Kneeshaw, J.T. McGuire, Isabelle M. Cozzarelli, E.W. Smith
2011, Ground Water (49) 903-913
Rates of in situ microbial sulfate reduction in response to geochemical perturbations were determined using Native Organism Geochemical Experimentation Enclosures (NOGEEs), a new in situ technique developed to facilitate evaluation of controls on microbial reaction rates. NOGEEs function by first trapping a native microbial community in situ and then subjecting...
Ascent of neotropical migratory fish in the Itaipu Reservoir fish pass
S. Makrakis, L.E. Miranda, L.C. Gomes, M.C. Makrakis, H.M.F. Junior
2011, River Research and Applications (27) 511-519
The Piracema Canal is a complex 10-km fish pass system that climbs 120m to connect the Paran?? River to the Itaipu Reservoir along the Brazil-Paraguay border. The canal was constructed to allow migratory fishes to reach suitable habitats for reproduction and feeding in tributaries upstream from the reservoir. The Piracema...
Effects of hatchery fish density on emigration, growth, survival, and predation risk of natural steelhead parr in an experimental stream channel
Christopher P. Tatara, Stephen C. Riley, Barry A. Berejikian
2011, North American Journal of Fisheries Management (31) 224-235
Hatchery supplementation of steelhead Oncorhynchus mykiss raises concerns about the impacts on natural populations, including reduced growth and survival, displacement, and increased predation. The potential risks may be density dependent.We examined how hatchery stocking density and the opportunity to emigrate affect the responses of natural steelhead parr in an experimental...
Adaptive resource management and the value of information
B. Kenneth Williams, M.J. Eaton, D.R. Breininger
2011, Ecological Modelling (222) 3429-3436
The value of information is a general and broadly applicable concept that has been used for several decades to aid in making decisions in the face of uncertainty. Yet there are relatively few examples of its use in ecology and natural resources management, and almost none that are framed in...
Environmental conditions constrain the distribution and diversity of archaeal merA in Yellowstone National Park, Wyoming, U.S.A.
Y. Wang, E. Boyd, S. Crane, P. Lu-Irving, David P. Krabbenhoft, S. King, J. Dighton, G. Geesey, T. Barkay
2011, Microbial Ecology (62) 739-752
The distribution and phylogeny of extant protein-encoding genes recovered from geochemically diverse environments can provide insight into the physical and chemical parameters that led to the origin and which constrained the evolution of a functional process. Mercuric reductase (MerA) plays an integral role in mercury (Hg) biogeochemistry by catalyzing the...
