Latitudinal trends in Spartina alterniflora productivity and the response of coastal marshes to global change
Matthew L. Kirwan, Glenn R. Guntenspergen, James T. Morris
2009, Global Change Biology (15) 1982-1989
Marshes worldwide are actively degrading in response to increased sea level rise rates and reduced sediment delivery, though the growth rate of vegetation plays a critical role in determining their stability. We have compiled 56 measurements of above-ground annual productivity for Spartina alterniflora, the dominant macrophyte in North American...
Local versus landscape-scale effects of savanna trees on grasses
Corinna Riginos, James B. Grace, David J. Augustine, Truman P. Young
2009, Journal of Ecology (97) 1337-1345
1. Savanna ecosystems – defined by the coexistence of trees and grasses – cover more than one‐fifth the world’s land surface and harbour most of the world’s rangelands, livestock and large mammal diversity. Savanna trees can have a variety of effects on grasses, with consequences for the wild and domestic...
Lysimetric Evaluation of Simplified Surface Energy Balance Approach in the Texas High Plains
Gabriel B. Senay, P.H. Gowda, T.A. Howell, T.H. Marek
2009, Applied Engineering in Agriculture (25) 665-669
Numerous energy balance (EB) algorithms have been developed to make use of remote sensing data to estimate evapotranspiration (ET) regionally. However, most EB models are complex to use and efforts are being made to simplify procedures mainly through the scaling of reference ET. The Simplified Surface Energy Balance (SSEB) is...
Effects of Groundwater Development on Uranium: Central Valley, California, USA
Bryant C. Jurgens, Miranda S. Fram, Kenneth Belitz, Karen R. Burow, Matthew K. Landon
2009, Ground Water (48) 913-928
Uranium (U) concentrations in groundwater in several parts of the eastern San Joaquin Valley, California, have exceeded federal and state drinking water standards during the last 20 years. The San Joaquin Valley is located within the Central Valley of California and is one of the most productive agricultural areas in...
Importance of light, temperature, zooplankton, and fish in predicting the nighttime vertical distribution of Mysis diluviana
Brent Boscarino, Lars G. Rudstam, S.A. Ellenberger, Robert O’Gorman
2009, Aquatic Biology (5) 263-279
The opossum shrimp Mysis diluviana (formerly M. relicta) performs large amplitude diel vertical migrations in Lake Ontario and its nighttime distribution is influenced by temperature, light and the distribution of its predators and prey. At one location in southeastern Lake Ontario, we measured the vertical distribution of mysids, mysid predators (i.e. planktivorous fishes)...
Zoogeography, conservation, and ecology of crayfishes within the Cheat River basin of the Upper Monongehela River drainage, West Virginia
Stuart A. Welsh
2009, Proceedings of the West Virginia Academy of Science (81) 25-40
During summer 2008, we studied the geographic distribution and conservation status of crayfishes within the Cheat River basin of the upper Monongahela River drainage. Stream sites (n = 73) were selected with a probabilistic sampling design, whereas one reservoir (Cheat Lake) and seven terrestrial sites for burrowing crayfishes were selected...
New record for Woldstedtius flavolineatus (Ichneumonidae: Diplazontinae), a hymenopteran parasitoid of syrphid flies in Hawaii
Justin Cappadonna, Melody Euaparadorn, Robert W. Peck, Paul C. Banko
2009, Proceedings of the Hawaiian Entomological Society (41) 105-111
The parasitoid wasp Woldstedtius flavolineatus (Gravenhorst) (Ichneumonidae) attacks the larvae of syrphid flies (Syrphidae). Woldstedtius flavolineatus was collected in Hawaii for the first time during an extensive malaise trap-based survey of parasitoids in Hawaiian forests. Since its initial collection on Hawaii Island in January 2006, it has been collected at...
Microbial disease and the coral holobiont
David G. Bourne, Mary E. Garren, Thierry M. Work, Eugene Rosenberg, Garriet W. Smith, C. Drew Harvell
2009, Trends in Microbiology (17) 554-562
Tropical coral reefs harbour a reservoir of enormous biodiversity that is increasingly threatened by direct human activities and indirect global climate shifts. Emerging coral diseases are one serious threat implicated in extensive reef deterioration through disruption of the integrity of the coral holobiont – a complex symbiosis between the coral...
Seismic wave triggering of nonvolcanic tremor, episodic tremor and slip, and earthquakes on Vancouver Island
Justin L. Rubinstein, Joan S. Gomberg, John E. Vidale, Aaron G. Wech, Honn Kao, Kenneth C. Creager, Garry C. Rogers
2009, Journal of Geophysical Research B: Solid Earth (114)
[1] We explore the physical conditions that enable triggering of nonvolcanic tremor and earthquakes by considering local seismic activity on Vancouver Island, British Columbia during and immediately after the arrival of large-amplitude seismic waves from 30 teleseismic and 17 regional or local earthquakes. We identify tremor triggered...
Earth science: lasting earthquake legacy
Thomas E. Parsons
2009, Nature (462) 41-42
Earthquakes occur within continental tectonic plates as well as at plate boundaries. Do clusters of such mid-plate events constitute zones of continuing hazard, or are they aftershocks of long-past earthquakes? Early on the morning of 16 December 1811, an earthquake of about magnitude 7 shook the centre of the United States...
Comprehensive inter-laboratory calibration of reference materials for δ18O versus VSMOW using various on-line high-temperature conversion techniques
Willi A. Brand, Tyler B. Coplen, Anita T. Aerts-Bijma, John Karl Bohlke, Matthias Gehre, Heike Geilmann, Manfred Groning, Henk G. Jansen, Harro A. J. Meijer, Stanley J. Mroczkowski, Haiping Qi, Karin Soergel, Hilary Stuart-Williams, Stephan M. Weise, Roland A. Werner
2009, Rapid Communications in Mass Spectrometry (23) 999-1019
Internationally distributed organic and inorganic oxygen isotopic reference materials have been calibrated by six laboratories carrying out more than 5300 measurements using a variety of high-temperature conversion techniques (HTC) in an evaluation sponsored by the International Union of Pure and Applied Chemistry (IUPAC). To aid in the calibration of these reference...
Physical, Chemical, Ecological, and Age Data and Trench Logs from Surficial Deposits at Hatch Point, Southeastern Utah
Harland L. Goldstein, Mark E. Miller, James C. Yount, Marith C. Reheis, Richard L. Reynolds, Jayne Belnap, Paul J. Lamothe, John P. McGeehan
2009, Open-File Report 2009-1219
This report presents data and describes the methodology for physical, chemical and ecological measurements of sediment, soil, and vegetation, as well as age determinations of surficial deposits at Hatch Point, Canyon Rims area, Colorado Plateau, southeastern Utah. The results presented in this report support a study that examines geomorphic and...
A case study of carbon fluxes from land change in the Southwest Brazilian Amazon
K. Barrett, J. Rogan, J.R. Eastman
2009, Journal of Land Use Science (4) 233-248
Worldwide, land change is responsible for one-fifth of anthropogenic carbon emissions. In Brazil, three-quarters of carbon emissions originate from land change. This study represents a municipal-scale study of carbon fluxes from vegetation in Rio Branco, Brazil. Land-cover maps of pasture, forest, and secondary growth from 1993, 1996, 1999, and 2003...
Foraging behavior of pileated woodpeckers in partial cut and uncut bottomland hardwood forest
P. Newell, Sammy L. King, Michael D. Kaller
2009, Forest Ecology and Management (258) 1456-1464
In bottomland hardwood forests, partial cutting techniques are increasingly advocated and used to create habitat for priority wildlife like Louisiana black bear (Ursus americanus luteolus), white-tailed deer (Odocoileus virginianus), and Neotropical migrants. Although partial cutting may be beneficial to some species, those that use dead wood may be negatively affected...
Prologue
Homa J. Lee, William R. Normark
2009, GSA Special Papers (454)
The Southern California Continental Borderland and the associated Western Transverse Ranges constitute one of the most distinctive environments on the west coast of North America. Current thinking indicates that the physiography of the region resulted from change in plate motion during the Miocene when a remnant...
Review of the geologic history of the Pontchartrain Basin, northern Gulf of Mexico
James G Flocks, Mark Kulp, Jackie L Smith, S. Jeffress Williams
2009, Journal of Coastal Research (2009) 12-22
The Pontchartrain Basin extends over 44,000 km² from northern Mississippi to the Gulf of Mexico and includes one of the largest and most important estuarine systems in the United States. The basin supports a variety of environments, from woodlands in the north to wetlands in the south, and a growing...
Emergent insect production in post-harvest flooded agricultural fields used by waterbirds
Richard C. Moss, Steven C. Blumenshine, Julie Yee, Joseph P. Fleskes
2009, Wetlands (29) 875-883
California’s Tulare Lake Basin (TLB) is one of the most important waterbird areas in North America even though most wetlands there have been converted to cropland. To guide management programs promoting waterbird beneficial agriculture, which includes flooding fields between growing periods, we measured emergence rates of insects, an important waterbird...
Remediation of Mudboil Discharges in the Tully Valley of Central New York
William M. Kappel
2009, Open-File Report 2009-1173
Mudboils have been documented in the Tully Valley in Onondaga County, in central New York State, since the late 1890s and have continuously discharged sediment-laden (turbid) water into nearby Onondaga Creek since the 1950s. The discharge of sediment causes gradual land-surface subsidence that, in the past, necessitated rerouting a major...
A deployment of broadband seismic stations in two deep gold mines, South Africa
Arthur F. McGarr, Margaret S. Boettcher, Jon Peter B. Fletcher, Malcolm J. S. Johnston, R. Durrheim, S. Spottiswoode, A. Milev
2009, Conference Paper, 7th International Symposium on Rockburst and Seismicity in Mines (RaSiM7)
In-mine seismic networks throughout the TauTona and Mponeng gold mines provide precise locations and seismic source parameters of earthquakes. They also support small-scale experimental projects, including NELSAM (Natural Earthquake Laboratory in South African Mines), which is intended to record, at close hand, seismic rupture of a geologic fault that traverses...
Cross-shelf transport into nearshore waters due to shoaling internal tides in San Pedro Bay, CA
Marlene A. Noble, Burt Jones, Peter Hamilton, Jingping Xu, George Robertson, Leslie Rosenfeld, John Largier
2009, Continental Shelf Research (29) 1768-1785
In the summer of 2001, a coastal ocean measurement program in the southeastern portion of San Pedro Bay, CA, was designed and carried out. One aim of the program was to determine the strength and effectiveness of local cross-shelf transport processes. A particular objective was to assess the ability of...
The role of climate in the dynamics of a hybrid zone in Appalachian salamanders
Susan C. Walls
2009, Global Change Biology (15) 1903-1910
I examined the potential influence of climate change on the dynamics of a previously studied hybrid zone between a pair of terrestrial salamanders at the Coweeta Hydrologic Laboratory, U.S. Forest Service, in the Nantahala Mountains of North Carolina, USA. A 16-year study led by Nelson G. Hairston, Sr. revealed that...
Investigating Seed Longevity of Big Sagebrush (Artemisia tridentata)
Upekala C. Wijayratne, David A. Pyke
2009, Open-File Report 2009-1146
The Intermountain West is dominated by big sagebrush communities (Artemisia tridentata subspecies) that provide habitat and forage for wildlife, prevent erosion, and are economically important to recreation and livestock industries. The two most prominent subspecies of big sagebrush in this region are Wyoming big sagebrush (A. t. ssp. wyomingensis) and...
Carbon isotope turnover as a measure of arrival time in migratory birds
Steffen Oppel, Abby N. Powell
2009, Journal of Ornithology (151) 123-131
Arrival time on breeding or non-breeding areas is of interest in many ecological studies exploring fitness consequences of migratory schedules. However, in most field studies, it is difficult to precisely assess arrival time of individuals. Here, we use carbon isotope turnover in avian blood as a technique to estimate arrival...
Groundwater availability of the Central Valley Aquifer, California
Claudia C. Faunt, editor(s)
2009, Professional Paper 1766
California's Central Valley covers about 20,000 square miles and is one of the most productive agricultural regions in the world. More than 250 different crops are grown in the Central Valley with an estimated value of $17 billion per year. This irrigated agriculture relies heavily on surface-water diversions and groundwater...
Kilauea slow slip events: Identification, source inversions, and relation to seismicity
Emily K. Montgomery-Brown, P. Segall, Asta Miklius
2009, Journal of Geophysical Research B: Solid Earth (114)
Several slow slip events beneath the south flank of Kilauea Volcano, Hawaii, have been inferred from transient displacements in daily GPS positions. To search for smaller events that may be close to the noise level in the GPS time series, we compare displacement fields on Kilauea's south flank with displacement...
