The offshore export of sand during exceptional discharge from California rivers
Jonathan A. Warrick, Patrick L. Barnard
2012, Geology (40) 787-790
Littoral cells along active tectonic margins receive large inputs of sand and gravel from coastal watersheds and commonly lose this sediment to submarine canyons. One hypothesis is that the majority of coarse (sand and gravel) river sediment discharge will be emplaced within and immediately “resupply” local littoral cells. A competing...
Disequilibrium dihedral angles in dolerite sills
Marian B. Holness, Chris Richardson, Rosalind T. Helz
2012, Geology (40) 795-798
The geometry of clinopyroxene-plagioclase-plagioclase junctions in mafic rocks, measured by the median dihedral angle Θcpp, is created during solidification. In the solidifying Kilauea Iki (Hawaii) lava lake, the wider junctions between plagioclase grains are the first to be filled by pyroxene, followed by the narrower junctions. The final Θcpp, attained...
Transverse mixing of simulated piscicides in small montane streams
Peter J. Brown, Jenifer L. Ard, Alexander V. Zale
2012, Transactions of the American Fisheries Society (141) 353-356
Thorough mixing of piscicides into receiving waters is important for efficient and effective fish eradication. However, no guidance exists for the placement of drip stations with respect to mixing. Salt (NaCl) was used as a tracer to measure the mixing rates of center versus edge applications in riffle–pool, straight, and...
Wetland selection by breeding and foraging black terns in the Prairie Pothole Region of the United States
Valerie A. Steen, Abby N. Powell
2012, The Condor (114) 155-165
We examined wetland selection by the Black Tern (Chlidonias niger), a species that breeds primarily in the prairie pothole region, has experienced population declines, and is difficult to manage because of low site fidelity. To characterize its selection of wetlands in this region, we surveyed 589 wetlands throughout North and...
Quick-start guide for version 3.0 of EMINERS - Economic Mineral Resource Simulator
Walter J. Bawiec, Gregory T. Spanski
2012, Open-File Report 2009-1057
Quantitative mineral resource assessment, as developed by the U.S. Geological Survey (USGS), consists of three parts: (1) development of grade and tonnage mineral deposit models; (2) delineation of tracts permissive for each deposit type; and (3) probabilistic estimation of the numbers of undiscovered deposits for each deposit type (Singer and...
Seasonal patterns in nutrients, carbon, and algal responses in wadeable streams within three geographically distinct areas of the United States, 2007-08
Kathy Lee, David L. Lorenz, James C. Petersen, John B. Greene
2012, Scientific Investigations Report 2012-5086
The U.S. Geological Survey determined seasonal variability in nutrients, carbon, and algal biomass in 22 wadeable streams over a 1-year period during 2007 or 2008 within three geographically distinct areas in the United States. The three areas are the Upper Mississippi River Basin (UMIS) in Minnesota, the Ozark Plateaus (ORZK)...
Shahejie-Shahejie/Guantao/Wumishan and Carboniferous/Permian Coal-Paleozoic Total Petroleum Systems in the Bohaiwan Basin, China (based on geologic studies for the 2000 World Energy Assessment Project of the U.S. Geological Survey)
Robert T. Ryder, Jin Qiang, Peter J. McCabe, Vito F. Nuccio, Felix M. Persits
2012, Scientific Investigations Report 2011-5010
This report discusses the geologic framework and petroleum geology used to assess undiscovered petroleum resources in the Bohaiwan basin province for the 2000 World Energy Assessment Project of the U.S. Geological Survey. The Bohaiwan basin in northeastern China is the largest petroleum-producing region in China. Two total petroleum systems have...
Home range, habitat use, and migrations of hawksbill turtles tracked from Dry Tortugas National Park, Florida, USA
Kristen M. Hart, Autumn R. Sartain-Iverson, Ikuko Fujisaki, Harold L. Pratt Jr., Danielle Morley, Michael W. Feeley
2012, Marine Ecology Progress Series (457) 193-207
To determine habitat-use patterns of sub-adult hawksbills Eretmochelys imbricata, we conducted satellite- and acoustic-tracking of 3 turtles captured in August 2008 within Dry Tortugas National Park (DRTO), south Florida, USA, in the Gulf of Mexico; turtles ranged in size from 51.9 to 69.8 cm straight carapace length. After 263, 699, and...
Novel praziquantel treatment regime for controlling Asian tapeworm infections in pond-reared fish
Alison C. Iles, Thomas P. Archdeacon, Scott A. Bonar
2012, North American Journal of Aquaculture (74) 113-117
The Asian tapeworm Bothriocephalus achelognathii is an intestinal fish parasite that is nonnative to but widespread throughout the southwestern United States. Praziquantel is an anthelminthic drug commonly used to treat fish for Asian tapeworm; however, it does not kill tapeworm eggs, so the water in ponds used for fish rearing...
Perils of correlating CUSUM-transformed variables to infer ecological relationships (Breton et al. 2006; Glibert 2010)
James E. Cloern, Alan D. Jassby, Jacob Carstensen, William A. Bennett, Wim Kimmerer, Ralph Mac Nally, David H. Schoellhamer, Monika Winder
2012, Limnology and Oceanography (57) 665-668
We comment on a nonstandard statistical treatment of time-series data first published by Breton et al. (2006) in Limnology and Oceanography and, more recently, used by Glibert (2010) in Reviews in Fisheries Science. In both papers, the authors make strong inferences about the underlying causes of population variability based on...
Coordinated bird monitoring: Technical recommendations for military lands
Jonathan Bart, Ann Manning, Richard Fischer, Chris Eberly
2012, Open-File Report 2010-1078
The Department of Defense (DoD) is subject to several rules and regulations establishing responsibilities for monitoring migratory birds. The Sikes Act requires all military installations with significant natural resources to prepare and implement Integrated Natural Resources Management Plans (INRMPs). These plans guide the conservation and long-term management of natural resources...
The effect of changes in habitat conditions on the movement of juvenile Snail Kites Rostrhamus sociabilis
Andrea C. Bowling, Julien Martin, Wiley M. Kitchens
2012, Ibis (154) 554-565
The degradation of habitats due to human activities is a major topic of interest for the conservation and management of wild populations. There is growing evidence that the Florida Everglades ecosystem continues to suffer from habitat degradation. After a period of recovery in the 1990s, the Snail Kite Rostrhamus sociabilis...
A proxy for high-resolution regional reanalysis for the Southeast United States: assessment of precipitation variability in dynamically downscaled reanalyses
Lydia Stefanova, Vasubandhu Misra, Steven Chan, Melissa Griffin, James J. O’Brien, Thomas J. Smith III
2012, Climate Dynamics (38) 2449-2466
We present an analysis of the seasonal, subseasonal, and diurnal variability of rainfall from COAPS Land- Atmosphere Regional Reanalysis for the Southeast at 10-km resolution (CLARReS10). Most of our assessment focuses on the representation of summertime subseasonal and diurnal variability.Summer precipitation in the Southeast United States is a particularly challenging...
Documentation of the U.S. Geological Survey sea floor stress and sediment mobility database
P. Soupy Dalyander, Bradford Butman, Christopher R. Sherwood, Richard P. Signell
2012, Open-File Report 2012-1137
The U.S. Geological Survey Sea Floor Stress and Sediment Mobility Database contains estimates of bottom stress and sediment mobility for the U.S. continental shelf. This U.S. Geological Survey database provides information that is needed to characterize sea floor ecosystems and evaluate areas for human use. The estimates contained in the...
A conceptual model of the hydrogeologic framework, geochemistry, and groundwater-flow system of the Edwards-Trinity and related aquifers in the Pecos County region, Texas
Johnathan R. Bumgarner, Gregory P. Stanton, Andrew Teeple, Jonathan V. Thomas, Natalie A. Houston, Jason Payne, MaryLynn Musgrove
2012, Scientific Investigations Report 2012-5124
A conceptual model of the hydrogeologic framework, geochemistry, and groundwater-flow system of the Edwards-Trinity and related aquifers, which include the Pecos Valley, Igneous, Dockum, Rustler, and Capitan Reef aquifers, was developed as the second phase of a groundwater availability study in the Pecos County region in west Texas. The first...
Fire reinforces structure of pondcypress (Taxodium distichum var. imbricarium) domes in a wetland landscape
Adam C. Watts, Leda N. Kobziar, James R. Snyder
2012, Wetlands (32) 439-448
Fire periodically affects wetland forests, particularly in landscapes with extensive fire-prone uplands. Rare occurrence and difficulty of access have limited efforts to understand impacts of wildfires fires in wetlands. Following a 2009 wildfire, we measured tree mortality and structural changes in wetland forest patches. Centers of these circular landscape features...
Manatees mapping seagrass (USA & Puerto Rico)
Daniel H. Slone, James P. Reid, W. Judson Kenworthy, Giuseppe Di Carlo, Susan M. Butler
2012, Seagrass-Watch (46) 8-11
West Indian manatees (Trichechus manatus) are secretive creatures. While some of their behaviours at winter aggregation sites in Florida are readily visible to the casual observer, many of their habits and movements are difficult to observe. They rely on submerged vegetation for nutrition, and seagrasses are one of their most...
Frequent arousal from hibernation linked to severity of infection and mortality in bats with white-nose syndrome
DeeAnn M. Reeder, Craig L. Frank, Gregory G. Turner, Carol U. Meteyer, Allen Kurta, Eric R. Britzke, Megan E. Vodzak, Scott R. Darling, Craig W. Stihler, Alan C. Hicks, Roymon Jacob, Laura E. Grieneisen, Sarah A. Brownlee, Laura K. Muller, David S. Blehert
2012, PLoS ONE (7)
White-nose syndrome (WNS), an emerging infectious disease that has killed over 5.5 million hibernating bats, is named for the causative agent, a white fungus (Geomyces destructans (Gd)) that invades the skin of torpid bats. During hibernation, arousals to warm (euthermic) body temperatures are normal but deplete fat stores. Temperature-sensitive dataloggers...
A Climate Trend Analysis of Burkina Faso
Christopher C. Funk, Jim Rowland, Gary Eilerts, Alkhalil Adoum, Libby White
2012, Fact Sheet 2012-3084
This brief report, drawing from a multi-year effort by the U.S. Agency for International Development (USAID) Famine Early Warning Systems Network (FEWS NET), examines recent trends in rainfall and air temperatures. These analyses are based on quality controlled station observations. Conclusions: * Summer rains have remained steady over the past...
Sources of suspended sediment in the Waikele watershed, Oʻahu, Hawaiʻi
Scot K. Izuka
2012, Scientific Investigations Report 2012-5085
Data from streamflow/sediment gages and measurements of changes in channel-bed sediment storage were gathered between October 1, 2007, and September 30, 2010, to assess the sources of suspended sediment in the Waikele watershed, Oʻahu, Hawaiʻi. Streamflow from the watershed averaged 33 cubic feet per second during the study period, with...
Chesapeake Bay Watershed - Protecting the Chesapeake Bay and its rivers through science, restoration, and partnership
Water Resources Division, U.S. Geological Survey
2012, General Information Product 142
The Chesapeake Bay, the Nation's largest estuary, has been degraded due to the impact of human-population increase, which has doubled since 1950, resulting in degraded water quality, loss of habitat, and declines in populations of biological communities. Since the mid-1980s, the Chesapeake Bay Program (CBP), a multi-agency partnership which includes...
Hydrologic index development and application to selected Coastwide Reference Monitoring System sites and Coastal Wetlands Planning, Protection and Restoration Act projects
Gregg A. Snedden, Erick M. Swenson
2012, Open-File Report 2012-1122
Hourly time-series salinity and water-level data are collected at all stations within the Coastwide Reference Monitoring System (CRMS) network across coastal Louisiana. These data, in addition to vegetation and soils data collected as part of CRMS, are used to develop a suite of metrics and indices to assess wetland condition...
A Climate Trend Analysis of Niger
Christopher C. Funk, Jim Rowland, Gary Eilerts, Alkhalil Adoum, Libby White
2012, Fact Sheet 2012-3080
This brief report, drawing from a multi-year effort by the U.S. Agency for International Development (USAID) Famine Early Warning Systems Network (FEWS NET), identifies a substantial recovery of rainfall in Niger, accompanied by increases in air temperatures. These analyses are based on quality-controlled station observations. Conclusions: * Summer rains have...
Groundwater flow and water budget in the surficial and Floridan aquifer systems in east-central Florida
Nicasio Sepulveda, Claire R. Tiedeman, Andrew M. O’Reilly, Jeffery B. Davis, Patrick Burger
2012, Open-File Report 2012-1132
A numerical transient model of the surficial and Floridan aquifer systems in east-central Florida was developed to (1) increase the understanding of water exchanges between the surficial and the Floridan aquifer systems, (2) assess the recharge rates to the surficial aquifer system from infiltration through the unsaturated zone and (3)...
User guide for MODPATH version 6—A particle-tracking model for MODFLOW
David W. Pollock
2012, Techniques and Methods 6-A41
MODPATH is a particle-tracking post-processing model that computes three-dimensional flow paths using output from groundwater flow simulations based on MODFLOW, the U.S. Geological Survey (USGS) finite-difference groundwater flow model. This report documents MODPATH version 6. Previous versions were documented in USGS Open-File Reports 89-381 and 94-464. The program uses a...
