Factors affecting settling, survival, and viability of black bears reintroduced to Felsenthal National Wildlife Refuge, Arkansas
B.J. Wear, R. Eastridge, J. D. Clark
2005, Wildlife Society Bulletin (33) 1363-1374
We used radiotelemetry and population modeling techniques to examine factors related to population establishment of black bears (Ursus americanus) reintroduced to Felsenthal National Wildlife Refuge (NWR), Arkansas. Our objectives were to determine whether settling (i.e., establishment of a home range at or near the release site), survival, recruitment, and population...
Seasonal seismicity at western United States volcanic centers
L.B. Christiansen, S. Hurwitz, M.O. Saar, S. E. Ingebritsen, P. A. Hsieh
2005, Earth and Planetary Science Letters (240) 307-321
We examine 20-yr data sets of seismic activity from 10 volcanic areas in the western United States for annual periodic signals (seasonality), focusing on large calderas (Long Valley caldera and Yellowstone) and stratovolcanoes (Cascade Range). We apply several statistical methods to test for seasonality in the seismic catalogs. In 4...
Revised magnitude-bound relation for the Wabash Valley seismic zone of the central United States
Scott M. Olson, Russell A. Green, Stephen F. Obermeier
2005, Seismological Research Letters (76) 756-771
Seismic hazard assessment in the central United States, and in particular the Wabash Valley seismic zone of Indiana-Illinois, frequently relies on empirical estimates of paleoearthquake magnitudes (M). In large part these estimates have been made using the magnitude-bound method. Existing region-specific magnitude-bound relations rely heavily on only a few historical...
Northwest Basin and Range tectonic deformation observed with the Global Positioning System, 1999-2003
W.C. Hammond, W. Thatcher
2005, Journal of Geophysical Research B: Solid Earth (110) 1-12
We use geodetic velocities obtained with the Global Positioning System (GPS) to quantify tectonic deformation of the northwest Basin and Range province of the western United States. The results are based on GPS data collected in 1999 and 2003 across five new quasi-linear networks in northern Nevada, northeast California, and...
An evaluation of sampling strategies to improve precision of estimates of gross change in land use and land cover
S.V. Stehman, Terry L. Sohl, Thomas R. Loveland
2005, International Journal of Remote Sensing (26) 4941-4957
Statistical sampling offers a cost-effective, practical alternative to complete-coverage mapping for the objective of estimating gross change in land cover over large areas. Because land cover change is typically rare, the sampling strategy must take advantage of design and analysis tools that enhance precision. Using two populations of land cover...
Further evidence for the invasion and establishment of Pterois volitans (Teleostei: Scorpaenidae) along the Atlantic Coast of the United States
H.S. Meister, D.M. Wyanski, J.K. Loefer, Steve W. Ross, A.M. Quattrini, K. J. Sulak
2005, Southeastern Naturalist (4) 193-206
We document the continued population expansion of red lionfish, Pterois volitans, the first documented successful introduction of an invasive marine fish species from the western Pacific to Atlantic coastal waters of the United States. Red lionfish are indigenous to the Indo-Pacific and have apparently established one or more breeding populations...
An efficient algorithm for double-difference tomography and location in heterogeneous media, with an application to the Kilauea volcano
V. Monteiller, J.-L. Got, J. Virieux, P. Okubo
2005, Journal of Geophysical Research B: Solid Earth (110) 1-22
Improving our understanding of crustal processes requires a better knowledge of the geometry and the position of geological bodies. In this study we have designed a method based upon double-difference relocation and tomography to image, as accurately as possible, a heterogeneous medium containing seismogenic objects. Our approach consisted not only...
Magmatic unrest beneath Mammoth Mountain, California
D.P. Hill, S. Prejean
2005, Journal of Volcanology and Geothermal Research (146) 257-283
Mammoth Mountain, which stands on the southwest rim of Long Valley caldera in eastern California, last erupted ∼57,000 years BP. Episodic volcanic unrest detected beneath the mountain since late 1979, however, emphasizes that the underlying volcanic system is still active and capable of producing future volcanic eruptions. The unrest symptoms...
Foraging ecology of Caspian Terns in the Columbia River Estuary, USA
Donald E. Lyons, Daniel D. Roby, Ken Collis
2005, Waterbirds (28) 280-291
Comparisons were made of the foraging ecology of Caspian Terns (Sterna caspia) nesting on two islands in the Columbia River estuary using radio telemetry and observations of prey fed to chicks and mates at each colony. Early in the chick-rearing period, radio-tagged terns nesting...
The kinematic and hydrographic structure of the Gulf of Maine Coastal Current
N.R. Pettigrew, J.H. Churchill, C.D. Janzen, L.J. Mangum, R. P. Signell, A.C. Thomas, D.W. Townsend, J.P. Wallinga, H. Xue
2005, Deep-Sea Research Part II: Topical Studies in Oceanography (52) 2369-2391
The Gulf of Maine Coastal Current (GMCC), which extends from southern Nova Scotia to Cape Cod Massachusetts, was investigated from 1998 to 2001 by means of extensive hydrographic surveys, current meter moorings, tracked drifters, and satellite-derived thermal imagery. The study focused on two principal branches of the GMCC, the Eastern...
The Pinto shear zone; a Laramide synconvergent extensional shear zone in the Mojave Desert region of the southwestern United States
M.L. Wells, M.A. Beyene, T.L. Spell, J.L. Kula, D. M. Miller, K.A. Zanetti
2005, Journal of Structural Geology (27) 1697-1720
The Pinto shear zone is one of several Late Cretaceous shear zones within the eastern fringe of the Mesozoic magmatic arc of the southwest Cordilleran orogen that developed synchronous with continued plate convergence and backarc shortening. We demonstrate an extensional origin for the shear zone by describing the shear-zone geometry...
Structure and variability of the Western Maine Coastal Current
J.H. Churchill, N.R. Pettigrew, R. P. Signell
2005, Deep-Sea Research Part II: Topical Studies in Oceanography (52) 2392-2410
Analyses of CTD and moored current meter data from 1998 and 2000 reveal a number of mechanisms influencing the flow along the western coast of Maine. On occasions, the Eastern Maine Coastal Current extends into the western Gulf of Maine where it takes the form of a deep (order 100...
Assessing the competitive ability of Japanese stilt grass, Microstegium vimineum (Trin.) A. Camus
S. A. Leicht, J. A. Silander Jr., K. Greenwood
2005, Journal of the Torrey Botanical Society (132) 573-580
Microstegium vimineum (Japanese stilt grass) is an invasive grass in the eastern half of the United States which can form dense monocultures in forest understories, displacing native species. Although the loss of native species has been observed in the field, the actual competitive ability of this grass has not been...
The Coso EGS project - Recent developments
P. Rose, J. Sheridan, J. McCulloch, J.N. Moore, K. Kovac, R. Weidler, S. Hickman
2005, Conference Paper, Geothermal Energy--The World's Buried Treasure
An Enhanced Geothermal System (EGS) field experiment will be conducted to hydraulically stimulate injection well 34-9RD2, located on the east flank of the Coso geothermal reservoir, with the objective of increasing the injection rate of this well to 750 gpm at a wellhead pressure of 100 psi or less. The...
Anatahan, Northern Mariana Islands: Reconnaissance geological observations during and after the volcanic crisis of spring 1990, and monitoring prior to the May 2003 eruption
S.K. Rowland, J. P. Lockwood, F. A. Trusdell, R. B. Moore, M. K. Sako, R. Y. Koyanagi, G. Kojima
2005, Journal of Volcanology and Geothermal Research (146) 26-59
Anatahan island is 9.5 km east–west by 3.5 km north–south and truncated by an elongate caldera 5 km east–west by 2.5 km north–south. A steep-walled pit crater ∼1 km across and ∼200 m deep occupies the eastern part of the caldera. The island is the summit region of a mostly...
Natural landscape features, human-related attractants, and conflict hotspots: A spatial analysis of human-grizzly bear conflicts
S.M. Wilson, M.J. Madel, D.J. Mattson, J.M. Graham, J.A. Burchfield, J.M. Belsky
2005, Ursus (16) 117-129
There is a long history of conflict in the western United States between humans and grizzly bears (Ursus arctos) involving agricultural attractants. However, little is known about the spatial dimensions of this conflict and the relative importance of different attractants. This study was undertaken to better understand the spatial and...
The 2003 eruption of Anatahan volcano, Commonwealth of the Northern Mariana Islands: Chronology, volcanology, and deformation
F. A. Trusdell, R. B. Moore, M. Sako, R.A. White, S.K. Koyanagi, R. Chong, J.T. Camacho
2005, Journal of Volcanology and Geothermal Research (146) 184-207
The first historical eruption on Anatahan Island occurred on 10 May 2003 from the east crater of the volcano. The eruption was preceded by several hours of seismicity. Two and a half hours before the outbreak, the number of earthquakes surged to more than 100 events per hour. At 0730...
Factors influencing the biogeochemistry of sedimentary carbon and phosphorus in the Sacramento-San Joaquin Delta
E. B. Nilsen, M. L. Delaney
2005, Estuaries (28) 653-663
This study characterizes organic carbon (Corganic) and phosphorus (P) geochemistry in surface sediments of the Sacramento-San Joaquin Delta, California. Sediment cores were collected from five sites on a sample transect from the edge of the San Francisco Bay eastward to the freshwater Consumnes River. The top 8 cm of each...
Technical review of the status of Northern Goshawks in the western United States
D. E. Andersen, S. DeStefano, M.I. Goldstein, K. Titus, C. Crocker-Bedford, J.J. Keane, R.G. Anthony, Robert N. Rosenfield
2005, Journal of Raptor Research (39) 192-209
The U.S. Fish and Wildlife Service (FWS) was petitioned in 1997 to consider listing Northern Goshawks (Accipiter gentilis atricapillus) under the Endangered Species Act of 1973, west of the 100th meridian of the contiguous United States. In their 12-mo finding issued in June 1998, the FWS determined that listing this...
Toxic Alexandrium blooms in the western Gulf of Maine: The plume advection hypothesis revisited
D.M. Anderson, B.A. Keafer, W.R. Geyer, R. P. Signell, T.C. Loder
2005, Limnology and Oceanography (50) 328-345
The plume advection hypothesis links blooms of the toxic dinoflagellate Alexandrium fundyense in the western Gulf of Maine (GOM) to a buoyant plume derived from river outflows. This hypothesis was examined with cruise and moored-instrument observations in 1993 when levels of paralytic shellfish poisoning (PSP) toxins were high, and in...
Cultural change in the songs of humpback whales (Megaptera novaeangliae) from Tonga
N. Eriksen, L.A. Miller, J. Tougaard, D.A. Helweg
2005, Behaviour (142) 305-328
Some humpback whales migrate annually from Antarctic feeding grounds to the seas around the Tongan Islands to give birth and mate. The Tongan humpbacks are considered part of Southern Hemisphere Group V that splits during migration, some swimming to Eastern Australia and others to various Polynesian Islands. During this time...
U-Pb zircon ages and Pb isotope geochemistry of gold deposits in the Carolina slate belt of South Carolina
Robert A. Ayuso, Joseph L. Wooden, Nora K. Foley, Robert R. Seal, A. Krishna Sinha
2005, Economic Geology (100) 225-252
Volcanic rocks of the Persimmon Fork Formation host the largest known gold mines of the Carolina slate belt. U-Pb (SHRIMP) zircon ages have been obtained from rocks closely associated with pyrite-enargite-gold deposits at Brewer (quartz-topaz rhyolite breccia from the argillic alteration zone in the Brewer pit and felsic ash-flow tuff...
Tree mortality, canopy turnover, and woody detritus in old cove forests of the southern Appalachians
Richard T. Busing
2005, Ecology (86) 73-84
A long-term study of tree mortality, canopy turnover, and coarse woody detritus inputs was conducted in cove forests of the Great Smoky Mountains, Tennessee, USA. Seven old-growth stands were studied over a 10-yr period using 0.6–1.0 ha plots. Annual mortality of trees >10 cm dbh was 0.5–1.4% among stands (mean...
Host population persistence in the face of introduced vector-borne diseases: Hawaii amakihi and avian malaria
B.L. Woodworth, C. T. Atkinson, D.A. Lapointe, P.J. Hart, C.S. Spiegel, E.J. Tweed, C. Henneman, J. LeBrun, T. Denette, R. DeMots, K.L. Kozar, D. Triglia, Dan Lease, A. Gregor, T. Smith, D. Duffy
2005, Proceedings of the National Academy of Sciences of the United States of America (102) 1531-1536
The past quarter century has seen an unprecedented increase in the number of new and emerging infectious diseases throughout the world, with serious implications for human and wildlife populations. We examined host persistence in the face of introduced vector-borne diseases in Hawaii, where introduced avian malaria and introduced vectors have...
Generation and validation of characteristic spectra from EO1 Hyperion image data for detecting the occurrence of the invasive species, Chinese tallow
Elijah W. Ramsey III, A. Rangoonwala, G. Nelson, R. Ehrlich, K. Martella
2005, International Journal of Remote Sensing (26) 1611-1636
Chinese tallow (Triadica sebifera) is an invasive tree that is spreading throughout the south-eastern United States and now into the west, and in many places causing extensive change to native habitat and associated wildlife. Detecting and mapping the relative distribution of this species is important to its control and eradication....
