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Page 1555, results 38851 - 38875

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Tamarisk in riparian woodlands: A bird’s eye view
Mark K. Sogge, Eben H. Paxton, Charles van Riper III
Anna Sher, Martin F. Quigley, editor(s)
2013, Book chapter, Tamarix: a case study of ecological change in the American West
This chapter presents a “bird's eye” view of tamarisk and examines some issues surrounding the management of tamarisk in riparian woodlands. The focus on birds is based on the fact that they are a relatively well-studied group that can provide important insights into the role of tamarisk in riparian ecosystems....
Diversidad haplotípica en el manatí Trichechus manatus en Cuba: resultados preliminares
Damir Hernandez-Martinez, Anmari Alvarez-Aleman, Robert K. Bonde, James A. Powell, Erik Garcia-Machado
2013, Revista de investigación (33) 58-61
The aim of this analysis was to obtain information regarding the mtDNA haplotype composition of the manatee (T. manatus) occupying the Cuban archipelago. A fragment of 410 bp of the non-coding region was analyzed for 12 individual manatees from Cuba and one from Florida, USA. Only two haplotypes were identified....
Current status, issues and applications of GIS to inland fisheries
William Fisher
Geoffery J. Meaden, Jose Aguilar-Manjarrez, editor(s)
2013, Book chapter, Advances in geographic information systems and remote sensing for fisheries and aquaculture: Summary version (FAO Fisheries and Aquaculture Technical Paper 552)
This chapter is concerned with GIS applications made to inland fisheries. These include fisheries in freshwater rivers, lakes and reservoirs. Although these GIS applications have increased rapidly since the late 1980s, this area of fish production receives less attention than either aquaculture or marine fisheries. This is probably because inland...
Geophysical constraints on Rio Grande rift structure and stratigraphy from magnetotelluric models and borehole resistivity logs, northern New Mexico
Brian D. Rodriguez, David A. Sawyer
Mark R. Hudson, V. J. S. Grauch, editor(s)
2013, Book chapter, New perspectives on Rio Grande Rift Basins: From tectonics to groundwater
Two- and three-dimensional electrical resistivity models derived from the magnetotelluric method were interpreted to provide more accurate hydrogeologic parameters for the Albuquerque and Española Basins. Analysis and interpretation of the resistivity models are aided by regional borehole resistivity data. Examination of the magnetotelluric response of hypothetical stratigraphic cases using resistivity...
Spatial and temporal variations in landscape evolution: historic and longer-term sediment flux through global catchments
Jacob A. Covault, William H. Craddock, Brian W. Romans, Andrea Fildani, Mayur Gosai
2013, The Journal of Geology (121) 35-56
Sediment generation and transport through terrestrial catchments influence soil distribution, geochemical cycling of particulate and dissolved loads, and the character of the stratigraphic record of Earth history. To assess the spatiotemporal variation in landscape evolution, we compare global compilations of stream gauge–derived () and cosmogenic radionuclide (CRN)–derived (predominantly 10Be; )...
Mobile Bay
Lawrence R. Handley, Kathryn A. Spear, Stephen Jones, Cindy A. Thatcher
2013, Report, Emergent wetlands status and trends in the northern Gulf of Mexico: 1950-2010
Mobile Bay is the largest bay found in Alabama’s coastal area (Handley et al., 2007). It was named an Estuary of National Significance in 1995 under the U.S. Environmental Protection Agency’s (EPA) National Estuary Program (NEP), and its Comprehensive Conservation Management Plan was completed in 2002. Mobile Bay is 1,070...
Strategies for rapid global earthquake impact estimation: the Prompt Assessment of Global Earthquakes for Response (PAGER) system
Kishor Jaiswal, D.J. Wald
2013, Book chapter, Handbook of seismic risk analysis and management of civil infrastructure systems
This chapter summarizes the state-of-the-art for rapid earthquake impact estimation. It details the needs and challenges associated with quick estimation of earthquake losses following global earthquakes, and provides a brief literature review of various approaches that have been used in the past. With this background, the chapter introduces the operational...
Spatio-temporal dynamics of pneumonia in bighorn sheep
E. Frances Cassirer, Raina K. Plowright, Kezia R. Manlove, Paul C. Cross, Andrew P. Dobson, Kathleen A. Potter, Peter J. Hudson
2013, Journal of Animal Ecology (82) 518-528
Bighorn sheep mortality related to pneumonia is a primary factor limiting population recovery across western North America, but management has been constrained by an incomplete understanding of the disease. We analysed patterns of pneumonia-caused mortality over 14 years in 16 interconnected bighorn sheep populations to gain insights into underlying disease...
Deer density and disease prevalence influence transmission of Chronic Wasting Disease in White-tailed Deer
Michael D. Samuel, Bryan J. Richards, Daniel J. Storm, Robert E. Rolley, Paul Shelton, Nicholas S. Keuler, Timothy R. Van Deelen
2013, Ecosphere (4) 1-14
Host-parasite dynamics and strategies for managing infectious diseases of wildlife depend on the functional relationship between disease transmission rates and host density. However, the disease transmission function is rarely known for free-living wildlife, leading to uncertainty regarding the impacts of diseases on host populations and effective control actions. We evaluated...
Nest success of grassland birds in oak barrens and dry prairies in west central Wisconsin
Susan M. Vos, Christine Ribic
2013, Northeastern Naturalist (20) 131-142
We investigated nesting success of grassland birds on dry prairie and oak barrens patches embedded within a forested matrix on Fort McCoy Military Installation. We monitored 280 nests of 9 grassland-bird species from mid-May to late July 2000–2002. Pooecetes gramineus (Vesper Sparrow) andAmmodramus savannarum (Grasshopper Sparrow) were the most abundant nesting species. Vesper...
Galveston Bay: Chapter D in Emergent wetlands status and trends in the northern Gulf of Mexico: 1950-2010
Lawrence R. Handley, Kathryn A. Spear, Eleonor Taylor, Cindy A. Thatcher
2013, Report, Emergent wetlands status and trends in the northern Gulf of Mexico: 1950-2010
The Galveston Bay estuary is located on the upper Texas Gulf coast (Lester and Gonzalez, 2002). It is composed of four major sub-bays - Galveston, Trinity, East, and West Bays. It is Texas’ largest estuary on the Gulf Coast with a total area of 155,399 hectares (384,000 acres) and 1,885...
Re-introduction of Bobcats to Cumberland Island, Georgia, USA: Status and lessons learned after 25 years
Duane R. Diefenbach, Leslie A. Hansen, Cassandra Miller-Butterworth, Justin H. Bohling, Robert J. Warren, Michael J. Conroy
Pritpal S. Soorae, editor(s)
2013, Book chapter, Global re-introduction perspectives: 2013: Further case-studies from around the globe
The bobcat (Lynx rufus) is a medium-sized spotted cat (4 - 18 kg), widely distributed in North America. Bobcats are legally harvestable in most of their range, and are currently classified as Least Concern by IUCN and listed in Appendix II of CITES, due to similarity of appearance with other...
A simple device for measuring the minimum current velocity to maintain semi-buoyant fish eggs in suspension
Julia S. Mueller, Brandon D. Cheek, Qingman Chen, Jillian R. Groeschel, Shannon K. Brewer, Timothy B. Grabowski
2013, Prairie Naturalist (45) 84-89
Pelagic broadcast spawning cyprinids are common to Great Plains rivers and streams. This reproductive guild produces non-adhesive semi-buoyant eggs that require sufficient current velocity to remain in suspension during development. Although studies have shown that there may be a minimum velocity needed to keep the eggs in suspension, this velocity...
Land use and carbon dynamics in the southeastern United States from 1992 to 2050
Shuqing Zhao, Shuguang Liu, Terry L. Sohl, Claudia Young, Jeremy M. Werner
2013, Environmental Research Letters (8) 1-9
Land use and land cover change (LUCC) plays an important role in determining the spatial distribution, magnitude, and temporal change of terrestrial carbon sources and sinks. However, the impacts of LUCC are not well understood and quantified over large areas. The goal of this study was to...
Analysis and simulation of regional subsidence accompanying groundwater abstraction and compaction of susceptible aquifer systems in the USA
Devin L. Galloway, Michelle Sneed
2013, Boletín de la Sociedad Geológica Mexicana (65) 123-136
Regional aquifer-system compaction and land subsidence accompanying groundwater abstraction in susceptible aquifer systems in the USA is a challenge for managing groundwater resources and mitigating associated hazards. Developments in the assessment of regional subsidence provide more information to constrain analyses and simulation of aquifer-system compaction. Current popular approaches to simulating vertical aquifer-system deformation (compaction),...
Autumn monitoring of resident avifauna on Guana Island, British Virgin Islands
Clint W. Boal, Joseph M. Wunderle Jr., Wayne J. Arendt
2013, Ornitologia Neotropical (24) 335-343
Although the Caribbean region is considered a biodiversity hotspot and a priority for ecological conservation efforts, little information exists on population trends of West Indian landbirds. We combined avian survey data collected from three studies spanning a 16-year period on a small island with a minimal human presence in the...
Computationally efficient statistical differential equation modeling using homogenization
Mevin Hooten, Martha J. Garlick, James A. Powell
2013, Journal of Agricultural, Biological, and Environmental Statistics (18) 405-428
Statistical models using partial differential equations (PDEs) to describe dynamically evolving natural systems are appearing in the scientific literature with some regularity in recent years. Often such studies seek to characterize the dynamics of temporal or spatio-temporal phenomena such as invasive species, consumer-resource interactions, community evolution, and resource selection. Specifically,...
Comparison of DNA preservation methods for environmental bacterial community samples
Michael A. Gray, Zoe A. Pratte, Christina A. Kellogg
2013, FEMS Microbiology Ecology (83) 468-477
Field collections of environmental samples, for example corals, for molecular microbial analyses present distinct challenges. The lack of laboratory facilities in remote locations is common, and preservation of microbial community DNA for later study is critical. A particular challenge is keeping samples frozen in transit. Five nucleic acid preservation methods...
Tree-ring records of variation in flow and channel geometry
M.F. Merigliano, J.M. Friedman, M. L. Scott
2013, Book chapter, Reference module in earth systems and environmental sciences; Treatise on geomorphology, Volume 12
We review the use of tree rings to date flood disturbance, channel change, and sediment deposition, with an emphasis on rivers in semi-arid landscapes in the western United States. As watershed area decreases and aridity increases, large floods have a more pronounced and sustained effect on channel width and location,...