Evolutionary dynamics of a rapidly receding southern range boundary in the threatened California red-legged frog (Rana draytonii)
Jonathan Q. Richmond, Kelly R. Barr, Adam R. Backlin, Amy G. Vandergast, Robert N. Fisher
2013, Evolutionary Applications (6) 808-822
Populations forming the edge of a species range are often imperiled by isolation and low genetic diversity, with proximity to human population centers being a major determinant of edge stability in modern landscapes. Since the 1960s, the California red-legged frog (Rana draytonii) has undergone extensive declines in heavily urbanized southern...
Mapping invasive Phragmites australis in the coastal Great Lakes with ALOS PALSAR satellite imagery for decision support
Laura L. Bourgeau-Chavez, Kurt P. Kowalski, Martha L. Carlson Mazur, Kirk A. Scarbrough, Richard B. Powell, Colin N. Brooks, Brian Huberty, Liza K. Jenkins, Elizabeth C. Banda, David M. Galbraith, Zachary M. Laubach, Kevin Riordan
2013, Journal of Great Lakes Research (39) 65-77
The invasive variety of Phragmites australis (common reed) forms dense stands that can cause negative impacts on coastal Great Lakes wetlands including habitat degradation and reduced biological diversity. Early treatment is key to controlling Phragmites, therefore a map of the current distribution is needed. ALOS PALSAR imagery was used to...
Decomposition and nitrogen dynamics of 15N-labeled leaf, root, and twig litter in temperate coniferous forests
Tiff L. van Huysen, Mark E. Harmon, Steven S. Perakis, Hua Chen
2013, Oecologia (173) 1563-1573
Litter nutrient dynamics contribute significantly to biogeochemical cycling in forest ecosystems. We examined how site environment and initial substrate quality influence decomposition and nitrogen (N) dynamics of multiple litter types. A 2.5-year decomposition study was installed in the Oregon Coast Range and West Cascades using 15N-labeled litter from Acer macrophyllum,...
Effects of thinning on drought vulnerability and climate response in north temperate forest ecosystems
Anthony W. D’Amato, John B. Bradford, Shawn Fraver, Brian J. Palik
2013, Ecological Applications (23) 1735-1742
Reducing tree densities through silvicultural thinning has been widely advocated as a strategy for enhancing resistance and resilience to drought, yet few empirical evaluations of this approach exist. We examined detailed dendrochronological data from a long-term (>50 yrs) replicated thinning experiment to determine if density reductions conferred greater resistance and/or...
Tectonic map of the Circum-Pacific region, Pacific basin sheet
E. Scheibner, G. W. Moore, K. J. Drummond, Corvalan Q.J. Dalziel, T. Moritani, Y. Teraoka, T. Sato, C. Craddock
2013, Circum-Pacific Map 52
Circum-Pacific Map Project: The Circum-Pacific Map Project was a cooperative international effort designed to show the relationship of known energy and mineral resources to the major geologic features of the Pacific basin and surrounding continental areas. Available geologic, mineral, and energy-resource data are being complemented by new, project-developed data...
Potential depletion of surface water in the Colorado River and agricultural drains by groundwater pumping in the Parker-Palo Verde-Cibola area, Arizona and California
Stanley A. Leake, Sandra J. Owen-Joyce, Julian A. Heilman
2013, Scientific Investigations Report 2013-5134
Water use along the lower Colorado River is allocated as “consumptive use,” which is defined to be the amount of water diverted from the river minus the amount that returns to the river. Diversions of water from the river include surface water in canals and water removed from the river...
Potential increases in natural disturbance rates could offset forest management impacts on ecosystem carbon stocks
John B. Bradford, Nicholas R. Jensen, Grant M. Domke, Anthony W. D’Amato
2013, Forest Ecology and Management (308) 178-187
Forested ecosystems contain the majority of the world’s terrestrial carbon, and forest management has implications for regional and global carbon cycling. Carbon stored in forests changes with stand age and is affected by natural disturbance and timber harvesting. We examined how harvesting and disturbance interact to influence forest carbon stocks...
Pacific Island landbird monitoring annual report, Hawaii Volcanoes National Park, tract group 1 and 2, 2010
S. W. Judge, J. M. Gaudioso, B. H. Hsu, Richard J. Camp, P. J. Hart
2013, Report
In concordance with the stated role of the I&M Program, the objectives of this survey were to provide information for monitoring long-term trends in forest bird distribution, density, and abundance in HAVO. Ultimately, this information will help to inform and implement management actions to stabilize and/or increase bird populations....
Geodatabase compilation of hydrogeologic, remote sensing, and water-budget-component data for the High Plains aquifer, 2011
Natalie A. Houston, Sophia L. Gonzales-Bradford, Amanda T. Flynn, Sharon L. Qi, Steven M. Peterson, Jennifer S. Stanton, Derek W. Ryter, Terry L. Sohl, Gabriel B. Senay
2013, Data Series 777
The High Plains aquifer underlies almost 112 million acres in the central United States. It is one of the largest aquifers in the Nation in terms of annual groundwater withdrawals and provides drinking water for 2.3 million people. The High Plains aquifer has gained national and international attention as a...
Predicting paddlefish roe yields using an extension of the Beverton–Holt equilibrium yield-per-recruit model
M.E. Colvin, Phillip William Bettoli, G.D. Scholten
2013, North American Journal of Fisheries Management (33) 940-949
Equilibrium yield models predict the total biomass removed from an exploited stock; however, traditional yield models must be modified to simulate roe yields because a linear relationship between age (or length) and mature ovary weight does not typically exist. We extended the traditional Beverton-Holt equilibrium yield model to predict roe...
Hydrographs showing groundwater levels for selected wells in the Puyallup River watershed and vicinity, Pierce and King Counties, Washington
R. C. Lane, R. J. Julich, G.B. Justin
2013, Data Series 791
Hydrographs of groundwater levels for selected wells in and adjacent to the Puyallup River watershed in Pierce and King Counties, Washington, are presented using an interactive Web-based map of the study area to illustrate changes in groundwater levels on a monthly and seasonal basis. The interactive map displays well locations...
Thinning increases climatic resilience of red pine
Matthew Magruder, Sophan Chhin, Brian Palik, John B. Bradford
2013, Canadian Journal of Forest Research (43) 878-889
Forest management techniques such as intermediate stand-tending practices (e.g., thinning) can promote climatic resiliency in forest stands by moderating tree competition. Residual trees gain increased access to environmental resources (i.e., soil moisture, light), which in turn has the potential to buffer trees from stressful climatic conditions. The influences of climate...
Lithofacies, age, depositional setting, and geochemistry of the Otuk Formation in the Red Dog District, northwestern Alaska
Julie A. Dumoulin, Robert A. Burruss, Charles D. Blome
2013, Professional Paper 1795-B
Complete penetration of the Otuk Formation in a continuous drill core (diamond-drill hole, DDH 927) from the Red Dog District illuminates the facies, age, depositional environment, source rock potential, and isotope stratigraphy of this unit in northwestern Alaska. The section, in the Wolverine Creek plate of the Endicott Mountains Allochthon...
The δ2H and δ18O of tap water from 349 sites in the United States and selected territories
Tyler B. Coplen, Jurate M. Landwehr, Haiping Qi, Jennifer M. Lorenz
2013, Data Series 703
Because the stable isotopic compositions of hydrogen (δ2H) and oxygen (δ18O) of animal (including human) tissues, such as hair, nail, and urine, reflect the δ2H and δ18O of water and food ingested by an animal or a human and because the δ2H and δ18O of environmental waters vary geographically, δ2H...
Linking river management to species conservation using dynamic landscape scale models
Mary Freeman, Gary R. Buell, Lauren E. Hay, W. Brian Hughes, Robert B. Jacobson, John W. Jones, S.A. Jones, Jacob H. LaFontaine, Kenneth R. Odom, James T. Peterson, Jeffrey W. Riley, J. Stephen Schindler, C. Shea, J.D. Weaver
2013, River Research and Applications (29) 906-918
Efforts to conserve stream and river biota could benefit from tools that allow managers to evaluate landscape-scale changes in species distributions in response to water management decisions. We present a framework and methods for integrating hydrology, geographic context and metapopulation processes to simulate effects of changes in streamflow on fish...
Comparison of bird community indices for riparian restoration planning and monitoring
Jock S. Young, Elisabeth M. Ammon, Peter J. Weisburg, Thomas E. Dilts, Wesley E. Newton, Diane C. Wong-Kone, Lisa G. Heki
2013, Ecological Indicators (34) 159-167
The use of a bird community index that characterizes ecosystem integrity is very attractive to conservation planners and habitat managers, particularly in the absence of any single focal species. In riparian areas of the western USA, several attempts at arriving at a community index signifying a functioning riparian bird community...
Chemical and biological consequences of using carbon dioxide versus acid additions in ocean acidification experiments
Kimberly K. Yates, Christopher M. DuFore, Lisa L. Robbins
2013, Scientific Investigations Report 2012-5063
Use of different approaches for manipulating seawater chemistry during ocean acidification experiments has confounded comparison of results from various experimental studies. Some of these discrepancies have been attributed to whether addition of acid (such as hydrochloric acid, HCl) or carbon dioxide (CO2) gas has been used to adjust carbonate system...
Does calving matter? Evidence for significant submarine melt
Timothy C. Bartholomaus, Christopher F. Larsen, Shad O’Neel
2013, Earth and Planetary Science Letters (380) 21-30
During the summer in the northeast Pacific Ocean, the Alaska Coastal Current sweeps water with temperatures in excess of 12 °C past the mouths of glacierized fjords and bays. The extent to which these warm waters affect the mass balance of Alaskan tidewater glaciers is uncertain. Here we report hydrographic measurements...
Surface mineral maps of Afghanistan derived from HyMap imaging spectrometer data, version 2
Raymond F. Kokaly, Trude King, Todd M. Hoefen
2013, Data Series 787
This report presents a new version of surface mineral maps derived from HyMap imaging spectrometer data collected over Afghanistan in the fall of 2007. This report also describes the processing steps applied to the imaging spectrometer data. The 218 individual flight lines composing the Afghanistan dataset, covering more than 438,000...
Sediment distribution and hydrologic conditions of the Potomac aquifer in Virginia and parts of Maryland and North Carolina
Randolph E. McFarland
2013, Scientific Investigations Report 2013-5116
Sediments of the heavily used Potomac aquifer broadly contrast across major structural features of the Atlantic Coastal Plain Physiographic Province in eastern Virginia and adjacent parts of Maryland and North Carolina. Thicknesses and relative dominance of the highly interbedded fluvial sediments vary regionally. Vertical intervals in boreholes of coarse-grained sediment...
The influence of stream thermal regimes and preferential flow paths on hyporheic exchange in a glacial meltwater stream
Karen D. Cozzetto, Kenneth E. Bencala, Michael N. Gooseff, Diane M. McKnight
2013, Water Resources Research (49) 5552-5569
Given projected increases in stream temperatures attributable to global change, improved understanding of relationships between stream temperatures and hyporheic exchange would be useful. We conducted two conservative tracer injection experiments in a glacial meltwater stream, to evaluate the effects of hyporheic thermal gradients on exchange processes, including preferential flow paths...
Submergence Vulnerability Index development and application to Coastwide Reference Monitoring System Sites and Coastal Wetlands Planning, Protection and Restoration Act projects
Camille L. Stagg, Leigh A. Sharp, Thomas E. McGinnis, Gregg A. Snedden
2013, Open-File Report 2013-1163
Since its implementation in 2003, the Coastwide Reference Monitoring System (CRMS) in Louisiana has facilitated the creation of a comprehensive dataset that includes, but is not limited to, vegetation, hydrologic, and soil metrics on a coastwide scale. The primary impetus for this data collection is to assess land management activities,...
Shear-wave velocity-based probabilistic and deterministic assessment of seismic soil liquefaction potential
R. Kayen, R.E.S. Moss, E.M. Thompson, R.B. Seed, K.O. Cetin, A. Der Kiureghian, Y. Tanaka, K. Tokimatsu
2013, Journal of Geotechnical and Geoenvironmental Engineering (139) 407-419
Shear-wave velocity (Vs) offers a means to determine the seismic resistance of soil to liquefaction by a fundamental soil property. This paper presents the results of an 11-year international project to gather new Vs site data and develop probabilistic correlations for seismic soil liquefaction occurrence. Toward that objective, shear-wave velocity...
Environmental consequences of the Retsof Salt Mine roof collapse
Richard M. Yager
2013, Open-File Report 2013-1174
In 1994, the largest salt mine in North America, which had been in operation for more than 100 years, catastrophically flooded when the mine ceiling collapsed. In addition to causing the loss of the mine and the mineral resources it provided, this event formed sinkholes, caused widespread subsidence to land,...
Is there room for all of us? Renewable energy and Xerospermophilus mohavensis
Richard D. Inman, Todd C. Esque, Kenneth E. Nussear, Philip Leitner, Marjorie D. Matocq, Peter J. Weisberg, Tomas E. Dilts, Amy G. Vandergast
2013, Endangered Species Research (20) 1-18
Mohave ground squirrels Xerospermophilus mohavensis Merriam are small ground-dwelling rodents that have a highly restricted range in the northwest Mojave Desert, California, USA. Their small natural range is further reduced by habitat loss from agriculture, urban development, military training and recreational activities. Development of wind and solar resources for renewable...
