Timing of breeding and reproductive performance in murres and kittiwakes reflect mismatched seasonal prey dynamics
M.T. Shultz, John F. Piatt, A.M.A. Harding, Arthur B. Kettle, Thomas I. van Pelt
2009, Marine Ecology Progress Series (393) 247-258
Seabirds are thought to time breeding to match the seasonal peak of food availability with peak chick energetic demands, but warming ocean temperatures have altered the timing of spring events, creating the potential for mismatches. The resilience of seabird populations to climate change depends on their ability to anticipate changes...
Indicators of biodiversity and ecosystem services: A synthesis across ecosystems and spatial scales
C.K. Feld, P.M. Da Silva, J.P. Sousa, F. De Bello, R. Bugter, U. Grandin, D. Hering, S. Lavorel, O. Mountford, I. Pardo, M. Partel, J. Rombke, Leonard Sandin, K. Bruce Jones, P. Harrison
2009, Oikos (118) 1862-1871
According to the Millennium Ecosystem Assessment, common indicators are needed to monitor the loss of biodiversity and the implications for the sustainable provision of ecosystem services. However, a variety of indicators are already being used resulting in many, mostly incompatible, monitoring systems. In order to synthesise the different indicator approaches...
Diurnal stream habitat use of juvenile Atlantic salmon, brown trout and rainbow trout in winter
J. H. Johnson, K.A. Douglass
2009, Fisheries Management and Ecology (16) 352-359
The diurnal winter habitat of three species of juvenile salmonids was examined in a tributary of Skaneateles Lake, NY to compare habitat differences among species and to determine if species/age classes were selecting specific habitats. A total of 792 observations were made on the depth, velocity, substrate and cover (amount...
Developing consistent Landsat data sets for large area applications: the MRLC 2001 protocol
G. Chander, Chengquan Huang, Limin Yang, Collin G. Homer, C. Larson
2009, IEEE Geoscience and Remote Sensing Letters (6) 777-781
One of the major efforts in large area land cover mapping over the last two decades was the completion of two U.S. National Land Cover Data sets (NLCD), developed with nominal 1992 and 2001 Landsat imagery under the auspices of the MultiResolution Land Characteristics (MRLC) Consortium. Following the successful generation...
After the disaster: The hydrogeomorphic, ecological, and biological responses to the 1980 eruption of Mount St. Helens, Washington
Jon J. Major, Charlie Crisafulli, John Bishop
2009, Book chapter, Volcanoes to vineyards: Geologic field trips through the dynamic landscape of the Pacific Northwest
The 1980 eruption of Mount St. Helens caused instantaneous landscape disturbance on a grand scale. On 18 May 1980, an ensemble of volcanic processes, including a debris avalanche, a directed pyroclastic density current, voluminous lahars, and widespread tephra fall, abruptly altered landscape hydrology and geomorphology, and created distinctive disturbance zones...
Salinity tolerance and mycorrhizal responsiveness of native xeroriparian plants in semi-arid western USA
Vanessa B. Beauchamp, C. Walz, P.B. Shafroth
2009, Applied Soil Ecology (43) 175-184
Restoration of salt-affected soils is a global concern. In the western United States, restoration of salinized land, particularly in river valleys, often involves control of Tamarix, an introduced species with high salinity tolerance. Revegetation of hydrologically disconnected floodplains and terraces after Tamarix removal is often difficult because of limited knowledge...
Identification of hydrated silicate minerals on Mars using MRO-CRISM: Geologic context near Nili Fossae and implications for aqueous alteration
B.L. Ehlmann, J.F. Mustard, G.A. Swayze, R. N. Clark, J.L. Bishop, F. Poulet, D.J. Des Marais, L.H. Roach, R.E. Milliken, J.J. Wray, O. Barnouin-Jha, S.L. Murchie
2009, Journal of Geophysical Research E: Planets (114)
[1] The Noachian terrain west of the Isidis basin hosts a diverse collection of alteration minerals in rocks comprising varied geomorphic units within a 100,000 km2 region in and near the Nili Fossae. Prior investigations in this region by the Observatoire pour l'Minéralogie, l'Eau, les Glaces,...
Rayleigh-wave mode separation by high-resolution linear radon transform
Y. Luo, J. Xia, R. D. Miller, Y. Xu, J. Liu, Q. Liu
2009, Geophysical Journal International (179) 254-264
Multichannel analysis of surface waves (MASW) method is an effective tool for obtaining vertical shear wave profiles from a single non-invasive measurement. One key step of the MASW method is generation of a dispersion image and extraction of a reliable dispersion curve from raw multichannel shot records. Because different Rayleigh-wave...
Incised channel fills containing conifers indicate that seasonally dry vegetation dominated Pennsylvanian tropical lowlands
H. J. Falcon-Lang, W.J. Nelson, S. Elrick, C.V. Looy, P.R. Ames, William A. DiMichele
2009, Geology (37) 923-926
The idea that the Pennsylvanian tropical lowlands were temporally dominated by rainforest (i.e., the Coal Forest) is deeply ingrained in the literature. Here we challenge two centuries of research by suggesting that this concept is based on a taphonomic artifact, and that seasonally dry vegetation dominated instead. This controversial finding...
Hierarchical Bayesian analysis to incorporate age uncertainty in growth curve analysis and estimates of age from length: Florida manatee (Trichechus manatus) carcasses
L.K. Schwarz, M.C. Runge
2009, Canadian Journal of Fisheries and Aquatic Sciences (66) 1775-1789
Age estimation of individuals is often an integral part of species management research, and a number of ageestimation techniques are commonly employed. Often, the error in these techniques is not quantified or accounted for in other analyses, particularly in growth curve models used to describe physiological responses to environment and...
Contributions of vital rates to growth of a protected population of American black bears
M.S. Mitchell, L.B. Pacifici, J.B. Grand, R. A. Powell
2009, Ursus (20) 77-84
Analyses of large, long-lived animals suggest that adult survival generally has the potential to contribute more than reproduction to population growth rate (λ), but because survival varies little, high variability in reproduction can have a greater influence. This pattern has been documented for several species...
Biodegradation of 17β-estradiol, estrone, and testosterone in stream sediments
P. M. Bradley, F. H. Chapelle, L. B. Barber, P.B. McMahon, J.L. Gray, D.W. Kolpin
2009, Conference Paper, In Situ and On-Site Bioremediation-2009: Proceedings of the 10th International In Situ and On-Site Bioremediation Symposium
The release of endocrine-disrupting chemicals (EDCs) in wastewater treatment plant (WWTP) effluent poses a significant threat to the ecology of surface water receptors, due to impacts on the hormonal control, sexual development, reproductive success and community structure of the indigenous aquatic organisms and associated wildlife. Among the EDCs commonly observed...
Shifts in lake N: P stoichiometry and nutrient limitation driven by atmospheric nitrogen deposition
J.J. Elser, T. Andersen, Jill Baron, A.-K. Bergstrom, M. Jansson, M. Kyle, K. R. Nydick, L. Steger, D.O. Hessen
2009, Science (326) 835-837
Human activities have more than doubled the amount of nitrogen (N) circulating in the biosphere. One major pathway of this anthropogenic N input into ecosystems has been increased regional deposition from the atmosphere. Here we show that atmospheric N deposition increased the stoichiometric ratio of N and phosphorus (P) in...
Global distribution of bedrock exposures on Mars using THEMIS high-resolution thermal inertia
C.S. Edwards, J. L. Bandfield, P. R. Christensen, R.L. Fergason
2009, Journal of Geophysical Research E: Planets (114)
We investigate high thermal inertia surfaces using the Mars Odyssey Thermal Emission Imaging System (THEMIS) nighttime temperature images (100 m/pixel spatial sampling). For this study, we interpret any pixel in a THEMIS image with a thermal inertia over 1200 J m-2 K-1 s-1/2 as "bedrock" which represents either in situ...
Avian response to early tidal salt marsh restoration at former commercial salt evaporation ponds in San Francisco Bay, California, USA
Nicole D. Athearn, John Y. Takekawa, Joel Shinn
2009, Natural Resources and Environmental Issues (15) 77-86
Restoration of former commercial salt evaporation ponds in the San Francisco Bay estuary is intended to reverse a severe decline (>79%) in tidal salt marshes. San Francisco Bay is a critical migratory stopover site and wintering area for shorebirds and waterfowl, and salt ponds are important high tide roosting and...
Heritage strain and diet of wild young of year and yearling lake trout in the main basin of Lake Huron
E.F. Roseman, W. Stott, T. P. O’Brien, S.C. Riley, J.S. Schaeffer
2009, Journal of Great Lakes Research (35) 620-626
Restoration of lake trout Salvelinus namaycush stocks in Lake Huron is a fish community objective developed to promote sustainable fish communities in the lake. Between 1985 and 2004, 12.65 million lake trout were stocked into Lake Huron representing eight different genetic strains. Collections of bona fide wild fish in USGS...
Hydrologic control of nitrogen removal, storage, and export in a mountain stream
R.O. Hall, M. A. Baker, C.D. Arp, B.J. Kocha
2009, Limnology and Oceanography (54) 2128-2142
Nutrient cycling and export in streams and rivers should vary with flow regime, yet most studies of stream nutrient transformation do not include hydrologic variability. We used a stable isotope tracer of nitrogen (15N) to measure nitrate (NO3−) uptake, storage, and export in a mountain stream, Spring Creek, Idaho, U.S.A....
On constraining pilot point calibration with regularization in PEST
M.N. Fienen, C.T. Muffels, R. J. Hunt
2009, Ground Water (47) 835-844
Ground water model calibration has made great advances in recent years with practical tools such as PEST being instrumental for making the latest techniques available to practitioners. As models and calibration tools get more sophisticated, however, the power of these tools can be misapplied, resulting in poor parameter estimates and/or...
The 20th-century development and expansion of Louisiana shelf hypoxia, Gulf of Mexico
L.E. Osterman, R.Z. Poore, P.W. Swarzenski, D.B. Senn, Steven F. DiMarco
2009, Geo-Marine Letters (29) 405-414
Since systematic measurements of Louisiana continental-shelf waters were initiated in 1985, hypoxia (oxygen content <2 mg L-1) has increased considerably in an area termed the dead zone. Monitoring and modeling studies have concluded that the expansion of the Louisiana shelf dead zone is related to increased anthropogenically derived nutrient delivery...
Data layer integration for the national map of the united states
E.L. Usery, M.P. Finn, M. Starbuck
2009, Cartographic Perspectives 28-41
The integration of geographic data layers in multiple raster and vector formats, from many different organizations and at a variety of resolutions and scales, is a significant problem for The National Map of the United States being developed by the U.S. Geological Survey. Our research has examined data integration from...
A comparison of pre- and post-remediation water quality, Mineral Creek, Colorado
R.L. Runkel, K.E. Bencala, B. A. Kimball, K. Walton-Day, P. L. Verplanck
2009, Hydrological Processes (23) 3319-3333
Pre- and post-remediation data sets are used herein to assess the effectiveness of remedial measures implemented in the headwaters of the Mineral Creek watershed, where contamination from hard rock mining has led to elevated metal concentrations and acidic pH. Collection of pre- and post-remediation data sets generally followed the synoptic...
Cataclysms and controversy: Aspects of the geomorphology of the Columbia River Gorge
Jim O’Connor, Scott Burns
Ian Madin, Rebecca Dorsey, editor(s)
2009, Book chapter, Volcanoes to vineyards: Geologic field trips through the dynamic landscape of the Pacific Northwest
Landslides and floods of lava and water tremendously affected the Columbia River during its long history of transecting the Cascade Volcanic Arc. This field trip touches on aspects of the resulting geology of the scenic Columbia River Gorge, including the river-blocking Bonneville landslide of ~550 years ago and the great...
Kootenai River velocities, depth, and white sturgeon spawning site selection – A mystery unraveled?
V.L. Paragamian, R. McDonald, G.J. Nelson, G. Barton
2009, Journal of Applied Ichthyology (25) 640-646
The Kootenai River white sturgeon Acipenser transmontanus population in Idaho, US and British Columbia (BC), Canada became recruitment limited shortly after Libby Dam became fully operational on the Kootenai River, Montana, USA in 1974. In the USA the species was listed under the Endangered Species Act in September of 1994. Kootenai River...
Variation in movement patterns of red drum (Sciaenops ocellatus) inferred from conventional tagging and ultrasonic telemetry
N.M. Bacheler, L.M. Paramore, S. M. Burdick, J.A. Buckel, J.E. Hightower
2009, Fishery Bulletin (107) 405-419
We used 25 years of conventional tagging data (n=6173 recoveries) and 3 years of ultrasonic telemetry data (n=105 transmitters deployed) to examine movement rates and directional preferences of four age classes of red drum (Sciaenops ocellatus) in estuarine and coastal waters of North Carolina. Movement rates of conventionally tagged red...
The Reocín zinc-lead deposit, Spain: paleomagnetic dating of a late Tertiary ore body
David T. A. Symons, Michael T. Lewchuk, Kazuo Kawasaki, Francisco Velasco, David L. Leach
2009, Mineralium Deposita (44) 867-880
The Reocín mine in northern Spain’s Basque–Cantabrian basin exploited a world-class Mississippi Valley-type Zn–Pb deposit. Its epigenetic mineralization is in Urgonian 116 ± 1 Ma dolomitized limestones of the Santillana syncline, which was formed by Oligocene and mid Miocene pulses of the Pyrenean orogeny. Paleomagnetic results (22 sites, 274 specimens) in mineralization isolated...
