Forest ecosystems: Vegetation, disturbance, and economics
Jeremy S. Littell, Jeffrey A. Hicke, Sarah L. Shafer, Susan M. Capalbo, Laurie L. Houston, Patty Glick
2013, Book chapter, Climate change in the northwest: Implications for our landscapes, waters, and communities
Forests cover about 47% of the Northwest (NW–Washington, Oregon, and Idaho) (Smith et al. 2009, fig. 5.1, table 5.1). The impacts of current and future climate change on NW forest ecosystems are a product of the sensitivities of ecosystem processes to climate and the degree to which humans depend on...
Adjustment of the San Francisco estuary and watershed to decreasing sediment supply in the 20th century
David H. Schoellhamer, Scott Wright, Judith Z. Drexler
2013, Marine Geology (345) 63-71
The general progression of human land use is an initial disturbance (e.g., deforestation, mining, agricultural expansion, overgrazing, and urbanization) that creates a sediment pulse to an estuary followed by dams that reduce sediment supply. We present a conceptual model of the effects of increasing followed by decreasing sediment supply that...
Early and late Holocene glacial fluctuations and tephrostratigraphy, Cabin Lake, Alaska
Paul D. Zander, Darrell S. Kaufman, Stephen C. Kuehn, Kristi L. Wallace, R. Scott Anderson
2013, Journal of Quaternary (28) 761-771
Marked changes in sediment types deposited in Cabin Lake, near Cordova, Alaska, represent environmental shifts during the early and late Holocene, including fluctuations in the terminal position of Sheridan Glacier. Cabin Lake is situated to receive meltwater during periods when the outwash plain of the advancing Sheridan Glacier had aggraded....
Microbial source tracking as a tool for TMDL development, Little Blue River in Independence, Missouri
Eric D. Christensen, Rebecca N. Bushon, Amie M. G. Brady
2013, Book, Proceedings of the Water Environment Federation
The Little Blue River in Jackson County, Missouri has been listed by the Missouri Department of Natural Resources as impaired by bacteria for the protection of aquatic life and contact recreation from urban point and nonpoint sources. The Clean Water Act requires that a total maximum daily load (TMDL) for...
The use of modeling and suspended sediment concentration measurements for quantifying net suspended sediment transport through a large tidally dominated inlet
Li H. Erikson, Scott Wright, Edwin Elias, Daniel M. Hanes, David H. Schoellhamer, John Largier
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 96-112
Sediment exchange at large energetic inlets is often difficult to quantify due complex flows, massive amounts of water and sediment exchange, and environmental conditions limiting long-term data collection. In an effort to better quantify such exchange this study investigated the use of suspended sediment concentrations (SSC) measured at an offsite...
Large-scale depositional characteristics of the Ulleung Basin and its impact on electrical resistivity and Archie-parameters for gas hydrate saturation estimates
Michael Riedel, Timothy S. Collett, H.-S. Kim, J.-J. Bahk, J.-H. Kim, B.-J. Ryu, G.-Y. Kim
2013, Marine and Petroleum Geology (47) 222-235
Gas hydrate saturation estimates were obtained from an Archie-analysis of the Logging-While-Drilling (LWD) electrical resistivity logs under consideration of the regional geological framework of sediment deposition in the Ulleung Basin, East Sea, of Korea. Porosity was determined from the LWD bulk density log and core-derived values of grain density. In...
Adaptive harvest management for the Svalbard population of pink-footed geese: assessment for the 2013-2015 hunting seasons
Fred A. Johnson, Jesper Madsen
2013, Technical Report from DCE - Danish Centre for Environment and Energy 28
This report describes progress on the development of an adaptive harvestmanagement strategy for maintaining the Svalbard population of pink-footed geese near their agreed target level (60,000) by providing for sustainable harvests in Norway and Denmark. Specifically, this report provides an optimal harvest quota for the 2013-2015 hunting seasons and describes...
Neutron absorption constraints on the composition of 4 Vesta
Thomas H. Prettyman, David W. Mittlefehldt, Naoyuki Yamashita, Andrew W. Beck, William C. Feldman, John S. Hendricks, David J. Lawrence, Timothy J. McCoy, Harry Y. McSween, Patrick N. Paplowski, Robert C. Reedy, Michael J. Toplis, Lucille Le Corre, Hugau Mizzon, Vishnu Reddy, Timothy N. Titus, Carol A. Raymond, Christopher T. Russell
2013, Meteoritics and Planetary Science (48) 2211-2236
Global maps of the macroscopic thermal neutron absorption cross section of Vesta's regolith by the Gamma Ray and Neutron Detector (GRaND) on board the NASA Dawn spacecraft provide constraints on the abundance and distribution of Fe, Ca, Al, Mg, and other rock-forming elements. From a circular, polar low-altitude mapping orbit,...
Sub-tidal benthic habitats of central San Francisco Bay and offshore Golden Gate area: A review
H. Gary Greene, Charles Endris, Tracy Vallier, Nadine E. Golden, Jeffery Cross, Holly F. Ryan, Bryan Dieter, Eric Niven
P.L. Barnard, B.E. Jaffe, D. H. Schoellhamer, editor(s)
2013, Marine Geology (345) 31-46
Deep-water potential estuarine and marine benthic habitat types were defined from a variety of new and interpreted data sets in central San Francisco Bay and offshore Golden Gate area including multibeam echosounder (MBES), side-scan sonar and bottom grab samples. Potential estuarine benthic habitats identified for the first time range from...
A step decrease in sediment concentration in a highly modified tidal river delta following the 1983 El Niño floods
Erin L. Hestir, David H. Schoellhamer, Tara Morgan-King, Susan L. Ustin
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 304-313
Anthropogenic activities in watersheds can have profound effects on sediment transport through river systems to estuaries. Disturbance in a watershed combined with alterations to the hydro-climatologic regime may result in changes to the sediment flux, and exacerbate the impacts of extreme events (such as large-magnitude floods) on sediment transport. In...
A non-destructive method for dating human remains
Warren K. Lail, David Sammeth, Shannon Mahan, Jason Nevins
2013, Advances in Archaeological Practice: A Journal of the Society for American Archaeology (1) 91-103
The skeletal remains of several Native Americans were recovered in an eroded state from a creek bank in northeastern New Mexico. Subsequently stored in a nearby museum, the remains became lost for almost 36 years. In a recent effort to repatriate the remains, it was necessary to fit them into...
Heavy mineral analysis for assessing the provenance of sandy sediment in the San Francisco Bay Coastal System
Florence L. Wong, Donald L. Woodrow, Mary McGann
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 170-180
Heavy or high-specific gravity minerals make up a small but diagnostic component of sediment that is well suited for determining the provenance and distribution of sediment transported through estuarine and coastal systems worldwide. By this means, we see that surficial sand-sized sediment in the San Francisco Bay Coastal System comes...
Biodiversity in a changing climate: a synthesis of current and projected trends in the US
Michelle D. Staudinger, Shawn L. Carter, Molly S. Cross, Natalie S. Dubois, J. Emmett Duffy, Carolyn Enquist, Roger Griffis, Jessica J. Hellmann, Joshua J. Lawler, John O’Leary, Scott A. Morrison, Lesley Sneddon, Bruce A. Stein, Laura M. Thompson, Woody Turner
2013, Frontiers in Ecology and the Environment (11) 465-473
This paper provides a synthesis of the recent literature describing how global biodiversity is being affected by climate change and is projected to respond in the future. Current studies reinforce earlier findings of major climate-change-related impacts on biological systems and document new, more subtle after-effects. For example, many species are...
Petroleum fingerprinting with organic markers
Frances D. Hostettler, T.D. Lorenson, Barbara A. Bekins
2013, Environmental Forensics (14) 262-277
Petroleum fingerprinting is an invaluable tool in forensic geochemistry. This article summarizes applications of fingerprinting in several oil spills and natural oil seepages that we have studied during the last 25 years. It shows how each unique chemical fingerprint can be used to correlate or differentiate oils. Fingerprints can provide...
Characterization of gas hydrate reservoirs by integration of core and log data in the Ulleung Basin, East Sea
J.-J. Bahk, G.-Y. Kim, J.-H. Chun, J.-H. Kim, J.Y. Lee, B.-J. Ryu, J.-H. Lee, B.-K. Son, Timothy S. Collett
2013, Marine and Petroleum Geology (47) 30-42
Examinations of core and well-log data from the Second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) drill sites suggest that Sites UBGH2-2_2 and UBGH2-6 have relatively good gas hydrate reservoir quality in terms of individual and total cumulative thicknesses of gas-hydrate-bearing sand (HYBS) beds. In both of the sites, core...
Distribution of biologic, anthropogenic, and volcanic constituents as a proxy for sediment transport in the San Francisco Bay Coastal System
Mary McGann, Li H. Erikson, Elmira Wan, Charles L. Powell II, Rosalie F. Maddocks
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 113-142
Although conventional sediment parameters (mean grain size, sorting, and skewness) and provenance have typically been used to infer sediment transport pathways, most freshwater, brackish, and marine environments are also characterized by abundant sediment constituents of biological, and possibly anthropogenic and volcanic, origin that can provide additional insight into local sedimentary...
Prolonged magmatic activity on Mars inferred from the detection of felsic rocks
James J. Wray, Sarah T. Hansen, Josef Dufek, Gregg A. Swayze, Scott L. Murchie, Frank P. Seelos, John R. Skok, Rossman P. Irwin III, Mark S. Ghiorso
2013, Nature Geoscience (6) 1013-1017
Rocks dominated by the silicate minerals quartz and feldspar are abundant in Earth’s upper continental crust. Yet felsic rocks have not been widely identified on Mars, a planet that seems to lack plate tectonics and the associated magmatic processes that can produce evolved siliceous melts on Earth. If Mars once...
Sediment transport in the San Francisco Bay Coastal System: An overview
Patrick L. Barnard, David H. Schoellhamer, Bruce E. Jaffe, Lester J. McKee
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 3-17
The papers in this special issue feature state-of-the-art approaches to understanding the physical processes related to sediment transport and geomorphology of complex coastal-estuarine systems. Here we focus on the San Francisco Bay Coastal System, extending from the lower San Joaquin-Sacramento Delta, through the Bay, and along the adjacent outer Pacific...
The added complications of climate change: Understanding and managing biodiversity and ecosystems
Amanda Staudt, Allison K. Leidner, Jennifer Howard, Kate A. Brauman, Jeffrey S. Dukes, Lara J. Hansen, Craig P. Paukert, John L. Sabo, Luis A. Solorzano
2013, Frontiers in Ecology and the Environment (11) 494-501
Ecosystems around the world are already threatened by land-use and land-cover change, extraction of natural resources, biological disturbances, and pollution. These environmental stressors have been the primary source of ecosystem degradation to date, and climate change is now exacerbating some of their effects. Ecosystems already under stress are likely to...
Characteristics and interpretation of fracture-filled gas hydrate: an example from the Ulleung Basin, East Sea of Korea
Myung Woong Lee, Timothy S. Collett
2013, Marine and Petroleum Geology (47) 168-181
Through the use of 2-D and 3-D seismic data, a total of thirteen sites were selected and drilled in the East Sea of Korea in 2010. A suite of logging-while-drilling (LWD) logs was acquired at each site. LWD logs from the UBGH2-3A well indicate significant gas hydrate in clay-bearing sediments...
Efficacy of hand-broadcast application of baits containing 0.005% diphacinone in reducing rat populations in Hawaiian forests
David Foote, Gerald D. Lindsey, Charlotte F. Perry, Eric Spurr
2013, Report, Hawaii Cooperative Studies Technical Report
Introduced black rats (Rattus rattus), Polynesian rats (R. exulans/i>), and Norway rats (R. norvegicus) impact insular bird, plant, and invertebrate populations worldwide. We investigated the efficacy of hand-broadcast application of Ramik® Green containing 0.005% diphacinone for rodent control in paired 4-ha treatment and non-treatment plots in both wet and mesic...
Evidence for a receiver bias underlying female preference for a male mating pheromone in sea lamprey
Tyler J. Buchinger, Huiyong Wang, Weiming Li, Nicholas S. Johnson
2013, Proceedings of the Royal Society B (280)
Receiver bias models suggest that a male sexual signal became exaggerated to match a pre-existing sensory, perceptual or cognitive disposition of the female. Accordingly, these models predict that females of related taxa possessing the ancestral state of signalling evolved preference for the male trait in a non-sexual context. We postulated...
Resilience to stress and disturbance, and resistance to Bromus tectorum L. invasion in cold desert shrublands of western North America
Jeanne C. Chambers, Bethany A. Bradley, Cynthia S. Brown, Carla D'Antonio, Matthew J. Germino, James B. Grace, Stuart P. Hardegree, Richard F. Miller, David A. Pyke
2013, Ecosystems (17) 360-375
Alien grass invasions in arid and semi-arid ecosystems are resulting in grass–fire cycles and ecosystem-level transformations that severely diminish ecosystem services. Our capacity to address the rapid and complex changes occurring in these ecosystems can be enhanced by developing an understanding of the environmental factors and ecosystem attributes that determine...
Measuring suspended sediment
J. R. Gray, M. N. Landers
2013, Book chapter, Comprehensive water quality and purification
Suspended sediment in streams and rivers can be measured using traditional instruments and techniques and (or) surrogate technologies. The former, as described herein, consists primarily of both manually deployed isokinetic samplers and their deployment protocols developed by the Federal Interagency Sedimentation Project. They are used on all continents other than...
The North American Breeding Bird Survey 1966–2011: Summary analysis and species accounts
John R. Sauer, William A. Link, Jane E. Fallon, Keith L. Pardieck, David J. Ziolkowski
2013, North American Fauna (79) 1-32
The North American Breeding Bird Survey is a roadside, count-based survey conducted by volunteer observers. Begun in 1966, it now is a primary source of information on spatial and temporal patterns of population change for North American birds. We analyze population change for states, provinces, Bird Conservation Regions, and the...
