Geologic map of the Topock 7.5’ quadrangle, Arizona and California
Keith A. Howard, Barbara E. John, Jane E. Nielson, Julia M. G. Miller, Joseph L. Wooden
2013, Scientific Investigations Map 3236
The Topock quadrangle exposes a structurally complex part of the Colorado River extensional corridor and also exposes deposits that record landscape evolution during the history of the Colorado River. Paleoproterozoic gneisses and Mesoproterozoic granitoids and intrusive sheets are exposed through tilted cross-sectional thicknesses of many kilometers. Intruding them are a...
Book review: Economic geology: Principles and practice: Metals, minerals, coal and hydrocarbons—Introduction to formation and sustainable exploitation of mineral deposits
Eric Anderson
2013, Economic Geology (108) 1517-1518
This volume, available in both hardcover and paperback, is an English translation of the fifth edition of the German language text Mineralische und Energie-Rohstoffe. The book provides an extensive overview of natural resources and societal issues associated with extracting raw materials. The comprehensive list of raw materials discussed includes metals,...
Preliminary report on the Late Pleistocene and Holocene diatoms of Swamp Lake, Yosemite National Park, California, USA
Scott W. Starratt, R. Scott Anderson
2013, Phytotaxa (127) 128-149
Swamp Lake, Yosemite National Park, is the only known lake in California containing long sequences of varved sediments and thus has the potential to provide a high-resolution record of climate variability. This preliminary analysis of the diatom assemblages from a 947-cm-long composite sediment core (freeze core FZ02–05; 0–67 cm, Livingstone...
Seismicity associated with the May 2010 eruption of South Sarigan Seamount, Northern Mariana Islands
Cheryl Searcy
2013, Seismological Research Letters (84) 1055-1061
On 29 May 2010, at approximately 11:48 UTC, an undersea volcano south of Sarigan in the Northern Mariana Islands (Figs. 1 and 2) erupted sending a cloud of volcanic ash and water vapor to 40,000 feet (12 km; Washington Volcanic Ash Advisory Center). Bathymetric data (Stern and Smoot, 1998; Embley et al., 2007)...
Tagging methods for estimating population size and mortality rates of inland striped bass populations
Joseph E. Hightower, Kenneth H. Pollock
2013, American Fisheries Society Symposium (80) 249-262
Striped bass Morone saxatilis in inland reservoirs play an important role ecologically and in supporting recreational fishing. To manage these populations, biologists need information about abundance and mortality. Abundance estimates can be used to assess the effectiveness of stocking programs that maintain most reservoir striped bass populations. Mortality estimates can...
Estimating abundance of adult striped bass in reservoirs using mobile hydroacoustics
Joseph E. Hightower, J. Christopher Taylor, Donald J. Degan
2013, American Fisheries Society Symposium (80) 279-289
Hydroacoustic surveys have proven valuable for estimating reservoir forage fish abundance but are more challenging for adult predators such as striped bass Morone saxatilis. Difficulties in assessing striped bass in reservoirs include their low density and the inability to distinguish species with hydroacoustic data alone. Despite these difficulties, mobile hydroacoustic...
Convection in a volcanic conduit recorded by bubbles
Rebecca J. Carey, Michael Manga, Wim Degruyter, Helge M. Gonnermann, Donald Swanson, Bruce F. Houghton, Tim R. Orr, Matthew R. Patrick
2013, Geology (41) 395-398
Microtextures of juvenile pyroclasts from Kīlauea’s (Hawai‘i) early A.D. 2008 explosive activity record the velocity and depth of convection within the basaltic magma-filled conduit. We use X-ray microtomography (μXRT) to document the spatial distribution of bubbles. We find small bubbles (radii from 5 μm to 70 μm) in a halo...
Diurnal activity patterns of Black-Necked Stilts (Himantopus mexicanus) during the non-breeding season in the eastern Caribbean
Laura Navarrete, Blake A. Grisham, Maria Kalyvaki, E. Kathleen McGaughey, Krista Mougey, Ben R. Skipper, Gad Perry, Clint W. Boal
2013, Journal of Caribbean Ornithology (26) 17-21
Diurnal activity patterns of resident Black-necked Stilts (Himantopus mexicanus) were observed on Guana Island, British Virgin Islands, during October 2010. Stilts were principally engaged in foraging and idle behaviors. The amount of time engaged in particular behaviors was relatively constant throughout the day, except during mid-afternoon when idleness increased and...
Channel unit use by Smallmouth Bass: Do land-use constraints or quantity of habitat matter?
Shannon K. Brewer
2013, North American Journal of Fisheries Management (33) 351-358
I examined how land use influenced the distribution of Smallmouth Bass Micropterus dolomieu in channel units (discrete morphological features—e.g., pools) of streams in the Midwestern USA. Stream segments (n = 36), from four clusters of different soil and runoff conditions, were identified that had the highest percent of forest (n = 12), pasture (n =...
Vertical structure use by the Stout Iguana (Cyclura pinguis) on Guana Island, BVI
Christopher A. Cheek, Shay Hlavaty, Rebecca N. Perkins, Mark A. Peyton, Caitlin N. Ryan, Jennifer C. Zavaleta, Clint W. Boal, Gad Perry
2013, IRCF Reptiles & Amphibians (20) 112-118
The Stout Iguana (Cyclura pinguis) is a critically endangered species endemic to the Puerto Rico Bank and currently restricted to the British Virgin Islands (BVI). Our study on Guana Island, BVI, focused on vertical structure use. Based on previous incidental observations, we hypothesized that Stout Iguanas use vertical structures and...
The ovenbird (Seiurus aurocapilla) as a model for testing food-value theory
Henry M. Streby, Sean M. Peterson, Brian Scholtens, Adrian P. Monroe, David E. Andersen
2013, The American Midland Naturalist (169) 214-220
Food-value theory states that territorial animals space themselves such that each territory contains adequate food for rearing young. The ovenbird (Seiurus aurocapilla) is often cited as a species for which this hypothesis is supported because ovenbird territory size is inversely related to ground-invertebrate abundance within territories. However, little is known...
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....
A river runs through it: conceptual models in fluvial geomorphology
Gordon E. Grant, James E. O'Connor, M. Gordon Wolman
John F. Shroder, editor(s)
2013, Book chapter
Thermokarst lakes, drainage, and drained basins
Guido Grosse, Benjamin M. Jones, C. Arp
John F. Schroder, editor(s)
2013, Book chapter, Glacial and periglacial geomorphology
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...
Curren fire regimes, impacts annd the likely changes: Temperate-Mediterranean North America
Max A. Moritz, Meg A. Krawchuk, Jon E. Keeley
2013, Report, Vegetation Fires and Global Change
No abstract available....
Predicting tamarisk current and future distribution
C. S. Jarnevich, P. Evangelista, J. Graham
Anna Sher, Martin F. Quigley, editor(s)
2013, Book chapter, Tamarix: A case study of ecological change in the American West
No abstract available....
Fungal degradation of coal as a pretreatment for methane production
Rizwan Haider, Muhammad A. Ghauri, John R. SanFilipo, Elizabeth J. Jones, William H. Orem, Calin A. Tatu, Kalsoom Akhtar, Nasrin Akhtar
2013, Fuel (104) 717-725
Coal conversion technologies can help in taking advantage of huge low rank coal reserves by converting those into alternative fuels like methane. In this regard, fungal degradation of coal can serve as a pretreatment step in order to make coal a suitable substrate for biological beneficiation. A fungal isolate MW1,...
Blending local scale information for developing agricultural resilience in Ethiopia
Christopher C. Funk, Gregory Husak, A.S Mahiny, Gary Eilerts, James Rowland
2013, Book chapter, Understanding and addressing threats to essential resources
This brief article looks at the intersection of climate, land cover/land use, and population trends in the world's most food insecure country, Ethiopia. As a result of warming in the Indian and Western Pacific oceans, Ethiopia has experienced substantial drying over the past 20 years. We intersect the spatial pattern...
An ecological perspective on the changing face of Brucella abortus in the western United States
Paul C. Cross, Eric J. Maichak, Angela Brennan, Brandon Scurlock, John C. Henningsen, Gordon Luikart
2013, OIE Revue Scientifique et Technique (32) 79-87
After a hiatus during the 1990s, outbreaks of Brucella abortus in cattle are occurring more frequently in some of the western states of the United States, namely, Montana, Wyoming and Idaho. This increase is coincident with increasing brucellosis seroprevalence in elk (Cervus elaphus), which is correlated with elk density. Vaccines...
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....
Smolt physiology and endocrinology
Stephen D. McCormick
Stephen D. McCormick, Anthony Peter Farrell, Colin J. Brauner, editor(s)
2013, Book chapter, Euryhaline fishes
Hormones play a critical role in maintaining body fluid balance in euryhaline fishes during changes in environmental salinity. The neuroendocrine axis senses osmotic and ionic changes, then signals and coordinates tissue-specific responses to regulate water and ion fluxes. Rapid-acting hormones, e.g. angiotensins, cope with immediate challenges by controlling drinking rate...
Reliability of fish size estimates obtained from multibeam imaging sonar
Joseph E. Hightower, Kevin J. Magowan, Lori M. Brown, Dewayne A. Fox
2013, Journal of Fish and Wildlife Management (4) 86-96
Multibeam imaging sonars have considerable potential for use in fisheries surveys because the video-like images are easy to interpret, and they contain information about fish size, shape, and swimming behavior, as well as characteristics of occupied habitats. We examined images obtained using a dual-frequency identification sonar (DIDSON) multibeam sonar for...
Telemetry-based mortality estimates of juvenile spot in two North Carolina estuarine creeks
Sarah E. Friedl, Jeffery A. Buckel, Joseph E. Hightower, Frederick S. Scharf, Kenneth H. Pollock
2013, Transactions of the American Fisheries Society (142) 399-415
We estimated natural mortality rates (M) of age-1 Spot Leiostomus xanthurus by using a sonic telemetry approach. Sonic transmitters were surgically implanted into a total of 123 age-1 Spot in two North Carolina estuarine creeks during spring 2009 and 2010, and the fish were monitored by using a stationary acoustic...
Distribution of burrowing owls in east-central South Dakota
Jill A. Shaffer, Jason P. Thiele
2013, The Prairie Naturalist (45) 60-64
Western burrowing owl (Athene cunicularia hypugaea) populations have declined across much of western North America, particularly at the northern and eastern edges of the species’ breeding range (Martell et al. 2001, Murphy et al. 2001, Shyry et al. 2001, Skeel et al. 2001, Klute et al. 2003). In South Dakota,...
