Geology and geomorphology of the Carolina Sandhills, Chesterfield County, South Carolina
Christopher S. Swezey, Bradley A. Fitzwater, G. Richard Whittecar
2016, Book
This two-day field trip focuses on the geology and geomorphology of the Carolina Sandhills in Chesterfield County, South Carolina. This area is located in the updip portion of the U.S. Atlantic Coastal Plain province, supports an ecosystem of longleaf pine (Pinus palustris) and wiregrass (Aristida stricta), and contains three major...
Volcanogenic massive sulphide and orogenic gold deposits of northern southeast Alaska
Patrick J Sack, Susan M. Karl, Nathan Steeves, J Bruce Gemmell
2016, Book
This five-day field trip visits the most significant mineral deposits in northern southeast Alaska. The trip begins and ends with regional transects in the interior Intermontane terranes around Whitehorse, Yukon, and the Insular terranes along the northern Chatham Strait region of southeast Alaska (Fig. A-1 and Fig. A-2; Plate-1). To...
Proceedings of the 2015 international summit on fibropapillomatosis: Global status, trends, and population impacts
Stacy A. Hargrove, Thierry M. Work, Shandell Brunson, Allen M. Foley, George H. Balazs
2016, NOAA Technical Memorandum NMFS-PIFSC-54
The 2015 International Summit on Fibropapillomatosis (FP) was convened in Honolulu, Hawaii June 11-14, 2015. Scientists from around the world were invited to present results from sea turtle monitoring and research programs as they relate to the global status, trends, and population impacts of FP on green turtles. The participants...
Acadia National Park Climate Change Scenario Planning Workshop summary
Jonathan Star, Nicholas Fisichelli, Alexander Bryan, Amanda Babson, Rebecca Cole-Will, Abraham J. Miller-Rushing
2016, Conference Paper
This report summarizes outcomes from a two-day scenario planning workshop for Acadia National Park, Maine (ACAD). The primary objective of the workshop was to help ACAD senior leadership make management and planning decisions based on up-to-date climate science and assessments of future uncertainty. The workshop was also designed as a...
Evidence for range contraction of snowshoe hare in Pennsylvania
Duane R. Diefenbach, Stephen L. Rathbun, J.K. Vreeland, Deborah Grove, William J. Kanapaux
2016, Northeastern Naturalist (23) 229-248
In Pennsylvania, Lepus americanus (Snowshoe Hare) is near the southern limits of its range and at risk of range contraction because of loss of early-successional forest and impacts of climate change. We used hunter-harvest data to investigate changes in the distribution of Snowshoe Hare in Pennsylvania (1983–2011), forest inventory and...
Deserts
Jayne Belnap, Robert H. Webb, Todd Esque, Matthew L. Brooks, Lesley A. DeFalco, James A. MacMahon
2016, Book chapter, Ecosystems of California
The deserts of California (Lead photo, Fig. 1) occupy approximately 38% of California’s landscape (Table 1) and consist of three distinct deserts: the Great Basin Desert, Mojave Desert, and Colorado Desert, the latter of which is a subdivision of the Sonoran Desert (Brown and Lowe 1980). The wide range of...
U-Pb, Re-Os, and Ar/Ar geochronology of rare earth element (REE)-rich breccia pipes and associated host rocks from the Mesoproterozoic Pea Ridge Fe-REE-Au deposit, St. Francois Mountains, Missouri
John N. Aleinikoff, David Selby, John F. Slack, Warren C. Day, Renee M. Pillers, Michael A. Cosca, Cheryl Seeger, C. Mark Fanning, Iain Samson
2016, Economic Geology (111) 1883-1914
Rare earth element (REE)-rich breccia pipes (600,000 t @ 12% rare earth oxides) are preserved along the margins of the 136-million metric ton (Mt) Pea Ridge magnetite-apatite deposit, within Mesoproterozoic (~1.47 Ga) volcanic-plutonic rocks of the St. Francois Mountains terrane in southeastern Missouri, United States. The breccia pipes cut the...
Fire as an ecosystem process: Chapter 3
Jon E. Keeley, Hugh D. Safford
Harold A. Mooney, Erika S. Zavaleta, editor(s)
2016, Book chapter, Ecosystems of California
This long-anticipated reference and sourcebook for California’s remarkable ecological abundance provides an integrated assessment of each major ecosystem type—its distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and...
Cascade Mountain Range in Oregon
David R. Sherrod
2016, Book chapter, The Oregon Encyclopedia
The Cascade mountain system extends from northern California to central British Columbia. In Oregon, it comprises the Cascade Range, which is 260 miles long and, at greatest breadth, 90 miles wide (fig. 1). Oregon’s Cascade Range covers roughly 17,000 square miles, or about 17 percent of the state, an...
Montane Forests
Malcolm P. North, Brandon M. Collins, Hugh D. Safford, Nathan L. Stephenson
2016, Book chapter, Ecosystems of California
This long-anticipated reference and sourcebook for California’s remarkable ecological abundance provides an integrated assessment of each major ecosystem type—its distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and...
The swing of it: Hammock camping
Jeffrey L. Marion
2016, A.T. Journeys (Spring 2016) 12-18
Hammock camping is dramatically expanding along the Appalachian Trail and raising both questions and concerns among Trail land managers, club members, and backpackers. This article examines some of the advantages and disadvantages of hammock camping, including resource and social impacts. Some Leave No Trace hammock camping practices are included for...
Stratigraphic architecture of a fluvial-lacustrine basin-fill succession at Desolation Canyon, Uinta Basin, Utah: Reference to Walthers’ Law and implications for the petroleum industry
Grace L. Ford, David R. Pyles, Marieke Dechesne
2016, Mountain Geologist (53) 5-28
A continuous window into the fluvial-lacustrine basin-fill succession of the Uinta Basin is exposed along a 48-mile (77-kilometer) transect up the modern Green River from Three Fords to Sand Wash in Desolation Canyon, Utah. In ascending order the stratigraphic units are: 1) Flagstaff Limestone, 2) lower Wasatch member of...
Coral calcification and ocean acidification
Paul L. Jokiel, Christopher P. Jury, Ilsa B. Kuffner
2016, Book chapter, Coral reefs at the crossroads
Over 60 years ago, the discovery that light increased calcification in the coral plant-animal symbiosis triggered interest in explaining the phenomenon and understanding the mechanisms involved. Major findings along the way include the observation that carbon fixed by photosynthesis in the zooxanthellae is translocated to animal cells throughout the colony...
Viral lysis of photosynthesizing microbes as a mechanism for calcium carbonate nucleation in seawater
John T. Lisle, Lisa L. Robbins
2016, Frontiers in Microbiology (7)
Removal of carbon through the precipitation and burial of calcium carbonate in marine sediments constitutes over 70% of the total carbon on Earth and is partitioned between coastal and pelagic zones. The precipitation of authigenic calcium carbonate in seawater, however, has been hotly debated because despite being in a supersaturated...
Lethal thermal maxima for age-0 pallid and shovelnose sturgeon: Implications for shallow water habitat restoration
David Deslauriers, Laura B. Heironimus, Steven R. Chipps
2016, River Research and Applications (32) 1872-1878
We evaluated temperature tolerance in age-0 pallid and shovelnose sturgeon (Scaphirhynchus albus and Scaphirhynchus platorynchus), two species that occur sympatrically in the Missouri and Mississippi Rivers. Fish (0.04–18 g) were acclimated to water temperatures of 13, 18 or 24 °C to quantify temperatures associated with lethal thermal maxima (LTM). The results show...
Effect of morphological fin curl on the swimming performance and station-holding ability of juvenile shovelnose sturgeon
David Deslauriers, Ryan Johnston, Steven R. Chipps
2016, Journal of Fish and Wildlife Management (7) 198-204
We assessed the effect of fin-curl on the swimming and station-holding ability of juvenile shovelnose sturgeon Scaphirhynchus platorynchus (mean fork length = 17 cm; mean weight = 16 g; n = 21) using a critical swimming speed test performed in a small swim chamber (90 L) at 20°C. We quantified...
Predicting invasiveness of species in trade: Climate match, trophic guild and fecundity influence establishment and impact of non-native freshwater fishes
Jennifer G. Howeth, Crysta A. Gantz, Paul L. Angermeier, Emmanuel A. Frimpong, Michael H. Hoff, Reuben P. Keller, Nicholas E. Mandrak, Michael P. Marchetti, Julian D. Olden, Christina M. Romagosa, David M. Lodge
2016, Diversity and Distributions (22) 148-160
AimImpacts of non-native species have motivated development of risk assessment tools for identifying introduced species likely to become invasive. Here, we develop trait-based models for the establishment and impact stages of freshwater fish invasion, and use them to screen non-native species common in international trade. We also determine which species...
Feeding ecology of non-native Siberian prawns, Palaemon modestus (Heller, 1862) (Decapoda, Palaemonidae), in the lower Snake River, Washington, U.S.A.
Kenneth F. Tiffan, William Hurst
2016, Crustaceana (89) 721-736
We used both stomach content and stable isotope analyses to describe the feeding ecology of Siberian prawns Palaemon modestus (Heller, 1862), a non-native caridean shrimp that is a relatively recent invader of the lower Snake River. Based on identifiable prey in stomachs, the opossum shrimp Neomysis mercedis Holmes, 1896 comprised...
Terrestrial cosmogenic surface exposure dating of glacial and associated landforms in the Ruby Mountains-East Humboldt Range of central Nevada and along the northeastern flank of the Sierra Nevada
Steven G. Wesnousky, Richard W. Briggs, Marc W. Caffee, Rick J. Ryerson, Robert C. Finkel, Lewis A. Owen
2016, Geomorphology (268) 72-81
Deposits near Lamoille in the Ruby Mountains-East Humboldt Range of central Nevada and at Woodfords on the eastern edge of the Sierra Nevada each record two distinct glacial advances. We compare independent assessments of terrestrial cosmogenic nuclide (TCN) surface exposure ages for glacial deposits that we have determined to those...
Relationship between porphyry systems, crustal preservation levels, and amount of exploration in magmatic belts of the Central Tethys Region
Lukas Zürcher, Jane M. Hammarstrom, John C. Mars, Stephen Ludington, Michael L. Zientek
2016, Book chapter, Tectonics and metallogeny of the Tethyan Orogenic Belt
Tectonic, geologic, geochemical, geochronologic, and ore deposit data from the U.S. Geological Survey-led assessment of 26 porphyry belts identified in the central Tethys region of Turkey, the Caucasus, Iran, western Pakistan, and southern Afghanistan relate porphyry mineralization to the...
An evaluation of behavior inferences from Bayesian state-space models: A case study with the Pacific walrus
William S. Beatty, Chadwick V. Jay, Anthony S. Fischbach
2016, Marine Mammal Science (32) 1299-1318
State-space models offer researchers an objective approach to modeling complex animal location data sets, and state-space model behavior classifications are often assumed to have a link to animal behavior. In this study, we evaluated the behavioral classification accuracy of a Bayesian state-space model in Pacific walruses using Argos satellite tags...
Predictive habitat models derived from nest-box occupancy for the endangered Carolina northern flying squirrel in the southern Appalachians
W. Mark Ford, A.M. Evans, Richard H. Odom, Jane L. Rodrigue, C.A. Kelly, Nicole Abaid, Corinne A. Diggins, Doug Newcomb
2016, Endangered Species Research (27) 131-140
In the southern Appalachians, artificial nest-boxes are used to survey for the endangered Carolina northern flying squirrel (CNFS; Glaucomys sabrinus coloratus), a disjunct subspecies associated with high elevation (>1385 m) forests. Using environmental parameters diagnostic of squirrel habitat, we created 35 a priori occupancy models in the program PRESENCE for boxes surveyed in...
A comparison of helicopter-borne electromagnetic systems for hydrogeologic studies
Paul A. Bedrosian, Cyril Schamper, Esben Auken
2016, Geophysical Prospecting (64) 192-215
The increased application of airborne electromagnetic surveys to hydrogeological studies is driving a demand for data that can consistently be inverted for accurate subsurface resistivity structure from the near surface to depths of several hundred metres. We present an evaluation of three commercial airborne electromagnetic systems over two test blocks...
Consequences of seasonal variation in reservoir water level for predatory fishes: linking visual foraging and prey densities
Stephen L. Klobucar, Phaedra E. Budy
2016, Canadian Journal of Fisheries and Aquatic Sciences (73) 53-64
In reservoirs, seasonal drawdown can alter the physical environment and may influence predatory fish performance. We investigated the performance of lake trout (Salvelinus namaycush) in a western reservoir by coupling field measurements with visual foraging and bioenergetic models at four distinct states (early summer, mid-summer, late summer, and fall). The...
A simple prioritization tool to diagnose impairment of stream temperature for coldwater fishes in the Great Basin
Jeffrey A. Falke, Jason B. Dunham, David Hockman-Wert, Randy A. Pahl
2016, North American Journal of Fisheries Management (36) 147-160
We provide a simple framework for diagnosing the impairment of stream water temperature for coldwater fishes across broad spatial extents based on a weight-of-evidence approach that integrates biological criteria, species distribution models, and geostatistical models of stream temperature. As a test case, we applied our approach to identify stream reaches...
