Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Average Daily Minimum Temperature, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-30
This tabular data set represents the average daily minimum temperature in Celsius multiplied by 100 for 2002, compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data were the Near-Real-Time High-Resolution Monthly Average Maximum/Minimum Temperature for the Conterminous United States for 2002...
Effects of subsidized predators, resource variability, and human population density on desert tortoise populations in the Mojave Desert, USA
Todd C. Esque, Kenneth E. Nussear, K. Kristina Drake, Andrew D. Walde, Kristin H. Berry, Roy C. Averill-Murray, A. Peter Woodman, William I. Boarman, Phil A. Medica, Jeremy S. Mack, Jill S. Heaton
2010, Endangered Species Research (12) 167-177
Understanding predator–prey relationships can be pivotal in the conservation of species. For 2 decades, desert tortoise Gopherus agassizii populations have declined, yet quantitative evidence regarding the causes of declines is scarce. In 2005, Ft. Irwin National Training Center, California, USA, implemented a translocation project including 2 yr of baseline monitoring...
Stochastic ecological network occupancy (SENO) models: a new tool for modeling ecological networks across spatial scales
Kevin D. Lafferty, Jennifer A. Dunne
2010, Theoretical Ecology (3) 123-135
Stochastic ecological network occupancy (SENO) models predict the probability that species will occur in a sample of an ecological network. In this review, we introduce SENO models as a means to fill a gap in the theoretical toolkit of ecologists. As input, SENO models use a topological interaction network and...
Invertebrate mercury bioaccumulation in permanent, seasonal, and flooded rice wetlands within California's Central Valley
Joshua T. Ackerman, A. Keith Miles, Collin A. Eagles-Smith
2010, Science of the Total Environment (408) 666-671
We examined methylmercury (MeHg) bioavailability in four of the most predominant wetland habitats in California's Central Valley agricultural region during the spring and summer: white rice, wild rice, permanent wetlands, and shallowly-flooded fallow fields. We sampled MeHg and total mercury (THg) concentrations in two aquatic macroinvertebrate taxa at the inlets,...
Variable responses of fish assemblages, habitat, and stability to natural-channel-design restoration in Catskill Mountain streams
Barry P. Baldigo, Anne G. Ernst, Dana R. Warren, Sarah J. Miller
2010, Transactions of the American Fisheries Society (139) 449-467
Natural-channel-design (NCD) restorations were recently implemented within large segments of five first- and second-order streams in the Catskill Mountains of New York in an attempt to increase channel stability, reduce bed and bank erosion, and sustain water quality. In conjunction with these efforts, 54 fish and habitat surveys were done...
Effects of natural-channel-design restoration on habitat quality in Catskill Mountain streams, New York
Anne G. Ernst, Barry P. Baldigo, Christiane Mulvihill, Mark Vian
2010, Transactions of the American Fisheries Society (139) 468-482
Stream restoration has received much attention in recent years, yet there has been little effort to evaluate its impacts on physical habitat, stability, and biota. A popular but controversial stream restoration approach is natural channel design (NCD), which cannot be adequately evaluated without a long-term, independent assessment of its effects...
Accuracy of egg flotation throughout incubation to determine embryo age and incubation day in waterbird nests
Joshua T. Ackerman, Collin A. Eagles-Smith
2010, The Condor (112) 438-446
Floating bird eggs to estimate their age is a widely used technique, but few studies have examined its accuracy throughout incubation. We assessed egg flotation for estimating hatch date, day of incubation, and the embryo's developmental age in eggs of the American Avocet (Recurvirostra americana), Black-necked Stilt (Himantopus mexicanus), and...
Annual sex steroid and other physiological profiles of Pacific lampreys (Entosphenus tridentatus)
Matthew G. Mesa, Jennifer M. Bayer, Mara B. Bryan, Stacia A. Sower
2010, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (155) 56-63
We documented changes in plasma levels of estradiol 17-β (E2), progesterone (P), 15α-hydroxytestosterone (15α-T), thyroxine (T4), triiodothyronine (T3), protein, triglycerides (TGs), and glucose in adult Pacific lampreys (Entosphenus tridentatus) held in the laboratory in two different years. Levels of E2 in both sexes ranged from 0.5 to 2 ng/mL from September...
Mercury dynamics in relation to dissolved organic carbon concentration and quality during high flow events in three northeastern U.S. streams
Jason A. Dittman, James B. Shanley, Charles T. Driscoll, George R. Aiken, Ann T. Chalmers, Janet E. Towse, Pranesh Selvendiran
2010, Water Resources Research (46)
Mercury (Hg) contamination is widespread in remote areas of the northeastern United States. Forested uplands have accumulated a large reservoir of Hg in soil from decades of elevated anthropogenic deposition that can be released episodically to stream water during high flows. The objective of this study was to evaluate spatial...
Anomalous spawning of smallmouth bass in Nebish Lake, Wisconsin: Implications for early spawning and over-winter survival
Peter James Brown, Michael A. Bozek
2010, Journal of Freshwater Ecology (25) 169-177
We observed that the smallmouth bass (Micropterus dolomieu) population in Nebish Lake, Wisconsin spawned twice-once during the traditional spring period and then again in summer, well beyond the typical spawning season for north-temperate lakes. We documented this anomalous spawning behavior and compared the characteristics of smallmouth bass nests built during...
Book review: Hollowed ground—Copper mining and community building on Lake Superior, 1840s–1990s
Klaus J. Schulz
2010, Economic Geology (105) 1351-1354
In 1843, six years before the Forty-niners headed west for the goldfields of California, the United States’ first great mineral rush began to a land that was, as Patrick Henry told Congress, “beyond the most distant wilderness and remote as the moon.” He was referring to the Keweenaw Peninsula of...
Geophysical framework of the northern San Francisco Bay region, California
Victoria E. Langenheim, Russell W. Graymer, Robert C. Jachens, Robert J. McLaughlin, D.L. Wagner, Donald S. Sweetkind
2010, Geosphere (6) 594-620
We use geophysical data to examine the structural framework of the northern San Francisco Bay region, an area that hosts the northward continuation of the East Bay fault system. Although this fault system has accommodated ∼175 km of right-lateral offset since 12 Ma, how this offset is partitioned north of...
Factors influencing the at-sea distribution of Cassin's Auklets (Ptychoramphus aleuticus) that breed in the Channel Islands, California
Josh Adams, John Y. Takekawa, Harry R. Carter, Julie L. Yee
2010, The Auk (127) 503-513
We used radiotelemetry to evaluate at-sea habitat use by Cassin's Auklets (Ptychoramphus aleuticus) that bred at Prince Island, off southern California, from 1999 through 2001. We used logistic regression to compare paired radiotelemetry (presence) with random (pseudo-absence) location-associated habitat variables derived from (1) satellite remote-sensing of sea surface temperature and...
Tectonic controls on nearshore sediment accumulation and submarine canyon morphology offshore La Jolla, Southern California
Nicolas Le Dantec, Leah J. Hogarth, Neal W. Driscoll, Jeffrey M. Babcock, Walter A. Barnhardt, William C. Schwab
2010, Marine Geology (268) 115-128
CHIRP seismic and swath bathymetry data acquired offshore La Jolla, California provide an unprecedented three-dimensional view of the La Jolla and Scripps submarine canyons. Shore-parallel patterns of tectonic deformation appear to control nearshore sediment thickness and distribution around the canyons. These shore-parallel patterns allow the impact of local tectonic deformation...
Caution on the use of liquid nitrogen traps in stable hydrogen isotope-ratio mass spectrometry
Tyler B. Coplen, Haiping Qi
2010, Analytical Chemistry (82) 7849-7851
An anomalous stable hydrogen isotopic fractionation of 4 ‰ in gaseous hydrogen has been correlated with the process of adding liquid nitrogen (LN2) to top off the dewar of a stainless-steel water trap on a gaseous hydrogen-water platinum equilibration system. Although the cause of this isotopic fractionation is unknown, its...
In vitro studies evaluating leaching of mercury from mine waste calcine using simulated human body fluids
John E. Gray, Geoffrey S. Plumlee, Suzette A. Morman, Pablo L. Higueras, James G. Crock, Heather A. Lowers, Mark L. Witten
2010, Environmental Science & Technology (44) 4782-4788
In vitro bioaccessibility (IVBA) studies were carried out on samples of mercury (Hg) mine-waste calcine (roasted Hg ore) by leaching with simulated human body fluids. The objective was to estimate potential human exposure to Hg due to inhalation of airborne calcine particulates and hand-to-mouth ingestion of Hg-bearing calcines. Mine waste...
Studies from the history of soil science and geology
Edward R. Landa, Benjamin R. Cohen
2010, Physics and Chemistry of the Earth, Parts A/B/C (35) 849-850
The United Nations proclaimed the year 2008 as the official International Year of Planet Earth (IYPE), with science and outreach activities spanning 2007–2009. IYPE-sponsored outreach helped focus the attention of the general public on topics such as human health and the environment; ocean and natural resources sustainability; mitigating natural hazards...
Climate and terrestrial ecosystem change in the U.S. Rocky Mountains and upper Columbia basin: Historical and future perspectives for natural resource management
Gregory T. Pederson, David B. McWethy, Stephen T. Gray, Philip E. Higuera, Jeremy S. Littell, Andrea J. Ray
2010, Report, National Park Service White Paper
Kinetics of selenium release in mine waste from the Meade Peak Phosphatic Shale, Phosphoria Formation, Wooley Valley, Idaho, USA
Lisa L. Stillings, Michael C. Amacher
2010, Chemical Geology (269) 113-123
Phosphorite from the Meade Peak Phosphatic Shale member of the Permian Phosphoria Formation has been mined in southeastern Idaho since 1906. Dumps of waste rock from mining operations contain high concentrations of Se which readily leach into nearby streams and wetlands. While the most common mineralogical residence of Se...
A strong conditional mutualism limits and enhances seed dispersal and germination of a tropical palm
R. Klinger, M. Rejmanek
2010, Oecologia (162) 951-963
Seed predation and seed dispersal can have strong effects on early life history stages of plants. These processes have often been studied as individual effects, but the degree to which their relative importance co-varies with seed predator abundance and how this influences seed germination rates is poorly understood. Therefore, we...
Sexually transmitted bacteria affect female cloacal assemblages in a wild bird
Joel White, Pascal Mirleau, Etienne Danchin, Herve Mulard, Scott A. Hatch, Phillipp Heeb, Richard H. Wagner
2010, Ecology Letters (13) 1515-1524
Sexual transmission is an important mode of disease propagation, yet its mechanisms remain largely unknown in wild populations. Birds comprise an important model for studying sexually transmitted microbes because their cloaca provides a potential for both gastrointestinal pathogens and endosymbionts to become incorporated into ejaculates. We experimentally demonstrate in a...
A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests
Craig D. Allen, A.K. Macalady, H. Chenchouni, D. Bachelet, N. McDowell, Michel Vennetier, T. Kitzberger, A. Rigling, D.D. Breshears, E. H. Hogg, P. Gonzalez, R. Fensham, Z. Zhang, J. Castro, N. Demidova, J.-H. Lim, G. Allard, S. W. Running, A. Semerci, N. Cobb
2010, Forest Ecology and Management (259) 660-684
Greenhouse gas emissions have significantly altered global climate, and will continue to do so in the future. Increases in the frequency, duration, and/or severity of drought and heat stress associated with climate change could fundamentally alter the composition, structure, and biogeography of forests in many regions. Of particular concern are...
Conceptual hierarchical modeling to describe wetland plant community organization
A.M. Little, G.R. Guntenspergen, T. F. H. Allen
2010, Wetlands (30) 55-65
Using multivariate analysis, we created a hierarchical modeling process that describes how differently-scaled environmental factors interact to affect wetland-scale plant community organization in a system of small, isolated wetlands on Mount Desert Island, Maine. We followed the procedure: 1) delineate wetland groups using cluster analysis, 2) identify differently scaled environmental...
A likelihood framework for joint estimation of salmon abundance and migratory timing using telemetric mark-recapture
Jeffrey F. Bromaghin, Kenneth S. Gates, Douglas E. Palmer
2010, North American Journal of Fisheries Management (30) 1385-1394
Many fisheries for Pacific salmon Oncorhynchus spp. are actively managed to meet escapement goal objectives. In fisheries where the demand for surplus production is high, an extensive assessment program is needed to achieve the opposing objectives of allowing adequate escapement and fully exploiting the available surplus. Knowledge of abundance is a critical...
Geological mapping goes 3-D in response to societal needs
H. Thorleifson, R. C. Berg, H.A.J. Russell
2010, GSA Today (20) 27-29
The transition to 3-D mapping has been made possible by technological advances in digital cartography, GIS, data storage, analysis, and visualization. Despite various challenges, technological advancements facilitated a gradual transition from 2-D maps to 2.5-D draped maps to 3-D geological mapping, supported by digital spatial and relational databases that can...
