Vegetation of natural and artificial shorelines in Upper Klamath Basin’s fringe wetlands
Andrew M. Ray, Kathryn M. Irvine, Andy S. Hamilton
2013, Wetland Science & Practice (30) 10-21
The Upper Klamath Basin (UKB) in northern California and southern Oregon supports large hypereutrophic lakes surrounded by natural and artificial shorelines. Lake shorelines contain fringe wetlands that provide key ecological services to the people of this region. These wetlands also provide a context for drawing inferences about how differing wetland...
Anadromous sea lampreys recolonize a Maine coastal river tributary after dam removal
Robert Hogg, Stephen M. Coghlan Jr., Joseph D. Zydlewski
2013, Transactions of the American Fisheries Society (142) 1381-1394
Sedgeunkedunk Stream, a third-order tributary to the Penobscot River, Maine, historically supported several anadromous fishes, including the Atlantic Salmon Salmo salar, AlewifeAlosa pseudoharengus, and Sea Lamprey Petromyzon marinus. However, two small dams constructed in the 1800s reduced or eliminated spawning runs entirely. In 2009, efforts to restore marine–freshwater connectivity in the system...
Effects of acidic deposition and soil acidification on sugar maple trees in the Adirondack Mountains, New York
Timothy J. Sullivan, Gregory B. Lawrence, Scott W. Bailey, Todd C. McDonnell, G.T. McPherson
2013, Report
This study documents the effects of acidic deposition and soil acid-base chemistry on the growth, regeneration, and canopy condition of sugar maple (SM) trees in the Adirondack Mountains of New York. Sugar maple is the dominant canopy species throughout much of the northern hardwood forest in the State. A field...
Management of wetlands for wildlife
Matthew J. Gray, Heath M. Hagy, J. Andrew Nyman, Joshua D. Stafford
2013, Book chapter
Wetlands are highly productive ecosystems that provide habitat for a diversity of wildlife species and afford various ecosystem services. Managing wetlands effectively requires an understanding of basic ecosystem processes, animal and plant life history strategies, and principles of wildlife management. Management techniques that are used differ depending on target species,...
Food availability and foraging near human developments by black bears
Jerod Merkle, Hugh S. Robinson, Paul R. Krausman, Paul B. Alaback
2013, Journal of Mammalogy (94) 378-385
Understanding the relationship between foraging ecology and the presence of human-dominated landscapes is important, particularly for American black bears (Ursus americanus), which sometimes move between wildlands and urban areas to forage. The food-related factors influencing this movement have not been explored, but can be important for understanding the benefits and...
The PRISM (Pliocene Palaeoclimate) reconstruction: Time for a paradigm shift
Harry J. Dowsett, Marci M. Robinson, Danielle K. Stoll, Kevin M. Foley, Andrew L. A. Johnson, Mark Williams, Christina Riesselman
2013, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (371) 1-24
Global palaeoclimate reconstructions have been invaluable to our understanding of the causes and effects of climate change, but single-temperature representations of the oceanic mixed layer for data–model comparisons are outdated, and the time for a paradigm shift in marine palaeoclimate reconstruction is overdue. The new paradigm in marine palaeoclimate reconstruction...
Distribution, habitat, and species description of the Diamond Darter, Crystallaria cincotta
Stuart A. Welsh
2013, Report, The IUCN Red List of Threatened Species
Distribution, habitat, and species description of the Diamond Darter, Crystallaria cincotta. ...
Future distribution of tundra refugia in northern Alaska
Andrew G. Hope, Eric Waltari, David C. Payer, Joseph A. Cook, Sandra L. Talbot
2013, Nature Climate Change (3) 931-938
Climate change in the Arctic is a growing concern for natural resource conservation and management as a result of accelerated warming and associated shifts in the distribution and abundance of northern species. We introduce a predictive framework for assessing the future extent of Arctic tundra and boreal biomes in northern...
NDVI saturation adjustment: a new approach for improving cropland performance estimates in the Greater Platte River Basin, USA
Yingxin Gu, Bruce K. Wylie, Daniel M. Howard, Khem P. Phuyal, Lei Ji
2013, Ecological Indicators (30) 1-6
In this study, we developed a new approach that adjusted normalized difference vegetation index (NDVI) pixel values that were near saturation to better characterize the cropland performance (CP) in the Greater Platte River Basin (GPRB), USA. The relationship between NDVI and the ratio vegetation index (RVI) at high NDVI values...
Summary, synthesis, and significance
Todd C. Esque, Kenneth E. Nussear, Richard D. Inman, Marjorie D. Matocq, Peter J. Weisberg, Thomas E. Dilts, Phillip Leitner
2013, Book chapter, Habitat modeling, landscape genetics, and habitat connectivity for the Mohave ground squirrel to guide renewable energy development, CEC‐500‐2014‐003
The initial habitat suitability model estimates pre‐European suitable habitat of the Mohave ground squirrel (MGS, Xerospermophilus mohavensis) covering 19,023 km2. Impact scenarios predicted that between 10 percent and 16 percent of suitable habitat has been lost to historical human disturbances, and up to an additional 10 percent may be affected...
Introduction
Todd C. Esque, Kenneth E. Nussear, Richard D. Inman, Marjorie D. Matocq, Peter J. Weisberg, Thomas E. Dilts, Philip Leitner
2013, Book chapter, Habitat modeling, landscape genetics, and habitat connectivity for the Mohave ground squirrel to guide renewable energy development, CEC‐500‐2014‐003
The Mohave ground squirrel (Xerospermophilus mohavensis), named just over a century ago (Merriam 1889), is precinctive to the western Mojave Desert in California, USA, and occupies portions of Kern, Los Angeles, Inyo and San Bernardino counties (Best 1995). Early estimates of the geographic range of the squirrel are just 20,000...
Re-introduction of tule elk to Point Reyes National Seashore, California, USA
Peter J. Gogan, McCrea A. Cobb, Natalie B. Gates, Reginald H. Barrett
Pritpal S. Soorae, editor(s)
2013, Book chapter, Global Re-introduction Perspectives: 2013. Further case studies from around the globe
Tule elk (Cervus elaphus nannodes), a subspecies endemic to California, was historically found in large herds throughout much of central and coastal California. Market hunting during the California Gold Rush decimated these herds, and by 1895, only two to 10 elk remained. This remnant group was protected and served as...
Spatial Relation Predicates in Topographic Feature Semantics
Dalia E. Varanka, Holly K. Caro
2013, Book chapter, Cognitive and Linguistic Aspects of Geographic Space
Topographic data are designed and widely used for base maps of diverse applications, yet the power of these information sources largely relies on the interpretive skills of map readers and relational database expert users once the data are in map or geographic information system (GIS) form. Advances in geospatial semantic...
Assessing winter cover crop nutrient uptake efficiency using a water quality simulation model
In-Young Yeo, Sangchui Lee, Ali M. Sadeghi, Peter C. Beeson, W. Dean Hively, Greg W. McCarty, Megan W. Lang
2013, Hydrology and Earth System Sciences (10) 14229-14263
Winter cover crops are an effective conservation management practice with potential to improve water quality. Throughout the Chesapeake Bay Watershed (CBW), which is located in the Mid-Atlantic US, winter cover crop use has been emphasized and federal and state cost-share programs are available to farmers to subsidize the cost of...
Migration patterns of Western High Arctic (Grey-belly) Brant Branta bernicla
W. Sean Boyd, David H. Ward, Donald K. Kraege, Alyssa A. Gerick
2013, Wildfowl (3) 3-25
This study describes the seasonal migration patterns of Western High Arctic Brant (WHA, or Grey-belly Brent Geese), Branta bernicla, an admixed population that breeds in the Canadian High Arctic and winters along the Pacific coast of North America. Adult WHA Brant were captured in family groups on Melville Island (75°23’N, 110°50’W)...
Polar bear use of a persistent food subsidy: insights from non-invasive genetic sampling in Alaska
Elizabeth L. Peacock, Jason Herreman
2013, Ursus (24) 148-163
Remains of bowhead whales (Balaena mysticetus) harvested by Iñupiat whalers are deposited in bone piles along the coast of Alaska and have become persistent and reliable food sources for polar bears (Ursus maritimus). The importance of bone piles to individuals and the population, the patterns of use, and the number,...
Zinc isotope and transition-element dynamics accompanying hydrozincite biomineralization in the Rio Naracauli, Sardinia, Italy
Richard B. Wanty, F. Podda, Giovanni De Giudici, R. Cidu, Pierfranco Lattanzi
2013, Chemical Geology (337-338) 1-10
The Rio Naracauli in SW Sardinia drains part of the Ingurtosu Zn–Pb mining district, and contains extreme concentrations of dissolved Zn at near-neutral pH. In the upper reaches of the stream, pH, alkalinity and Zn concentrations are such that hydrozincite [Zn5(CO3)2(OH)6] precipitates in a biologically mediated process facilitated by a...
Topological and canonical kriging for design flood prediction in ungauged catchments: an improvement over a traditional regional regression approach?
Stacey A. Archfield, Alessio Pugliese, Attilio Castellarin, Jon O. Skoien, Julie E. Kiang
2013, Hydrology and Earth System Sciences (17) 1575-1588
In the United States, estimation of flood frequency quantiles at ungauged locations has been largely based on regional regression techniques that relate measurable catchment descriptors to flood quantiles. More recently, spatial interpolation techniques of point data have been shown to be effective for predicting streamflow statistics (i.e., flood flows and...
Towards a publicly available, map-based regional software tool to estimate unregulated daily streamflow at ungauged rivers
Stacey A. Archfield, Peter A. Steeves, John D. Guthrie, Kernell G. Ries III
2013, Geoscientific Model Development (6) 101-115
Streamflow information is critical for addressing any number of hydrologic problems. Often, streamflow information is needed at locations that are ungauged and, therefore, have no observations on which to base water management decisions. Furthermore, there has been increasing need for daily streamflow time series to manage rivers for both human...
Genetic structure of the Common Eider in the western Aleutian Islands prior to fox eradication
Sarah A. Sonsthagen, Sandra L. Talbot, Robert E. Wilson, Margaret R. Petersen, Jeffrey C. Williams, G. Vernon Byrd, Kevin G. McCracken
2013, The Condor (115) 28-39
Since the late 18th century bird populations residing in the Aleutian Archipelago have been greatly reduced by introduced arctic foxes (Alopex lagopus). We analyzed data from microsatellite, nuclear intron, and mitochondrial (mtDNA) loci to examine the spatial genetic structure, demography, and gene flow among four Aleutian Island populations of the Common...
Phylogeography, post-glacial gene flow, and population history of North American goshawks (Accipeter gentilis)
Shelley Bayard De Volo, Richard T. Reynolds, Sarah A. Sonsthagen, Sandra L. Talbot, Michael F. Antolin
2013, The Auk (130) 342-354
Climate cycling during the Quaternary played a critical role in the diversification of avian lineages in North America, greatly influencing the genetic characteristics of contemporary populations. To test the hypothesis that North American Northern Goshawks (Accipitergentilis) were historically isolated within multiple Late Pleistocene refugia, we assessed diversity and population genetic...
Landsat Data Continuity Mission, now Landsat-8: six months on-orbit
Brian L. Markham, James C. Storey, James R. Irons
2013, Conference Paper, SPIE 8866, Earth Observing Systems
The Landsat Data Continuity Mission (LDCM) with two pushbroom Earth-imaging sensors, the Operational Land Imager (OLI) and the Thermal InfraRed Sensor (TIRS), was launched on February 11, 2013. Its on-orbit check out period or commissioning phase lasted about 90 days. During this phase the spacecraft and its instruments were activated,...
Empirical flow parameters : a tool for hydraulic model validity
William H. Asquith, Thomas E. Burley, Theodore G. Cleveland
2013, Book
The objectives of this project were (1) To determine and present from existing data in Texas, relations between observed stream flow, topographic slope, mean section velocity, and other hydraulic factors, to produce charts such as Figure 1 and to produce empirical distributions of the various flow parameters to provide a...
Water resources in the desert southwest
Robert H. Webb, Stanley A. Leake
Richard Malloy, John Brock, Anthony Floyd, Margaret Livingston, Robert H. Webb, editor(s)
2013, Book chapter, Design with the desert: Conservation and sustainable development
As the old saying goes, there is nothing more precious than water in the desert. The Ancestral Puebloans, Hohokam, and other pre-Columbian cultures knew this and built their civilizations near guaranteed water supplies. When the Spaniards arrived in present-day Arizona, they found that the Tohono O’odham and Piman cultures had...
Limiting the immediate and subsequent hazards associated with wildfires
Jerome V. DeGraff, Susan H. Cannon, Mario Parise
2013, Book chapter, Landslide Science and Practice: Volume 4: Global Environmental Change
Wildfire is a unique natural hazard because it poses immediate threats to life and property as well as creating conditions that can lead to subsequent debris flows. In recent years, the immediate destructive force of wildfires has been decreased through better understanding of fire behavior. Lightning detection networks now identify...
