Does avian species richness in natural patch mosaics follow the forest fragmentation paradigm?
D.C. Pavlacky Jr., S.H. Anderson
2007, Animal Conservation (10) 57-68
As one approaches the north-eastern limit of pinyon (Pinus spp.) juniper (Juniperus spp.) vegetation on the Colorado Plateau, USA, woodland patches become increasingly disjunct, grading into sagebrush (Artemisia spp.)-dominated landscapes. Patterns of avian species richness in naturally heterogeneous forests may or may not respond to patch discontinuity in the same...
Analysis of otolith microstructure for Cedar River Chinook salmon
A. Lind-Null, K. Larsen, R. Reisenbichler
2007, Report
No abstract available ...
Marine mammal populations
Alan M. Springer, Sara J. Iverson, James L. Bodkin
Robert B. Spies, editor(s)
2007, Book chapter, Long-term ecological change in the northern Gulf of Alaska
No abstract available....
Biodegradation of PAHs and PCBs in soils and sludges
L. Liu, J.A. Tindall, M.J. Friedel
2007, Water, Air, & Soil Pollution (181) 281-296
Results from a multi-year, pilot-scale land treatment project for PAHs and PCBs biodegradation were evaluated. A mathematical model, capable of describing sorption, sequestration, and biodegradation in soil/water systems, is applied to interpret the efficacy of a sequential active-passive biotreatment process of organic chemicals on remediation sites. To account for the...
Thamnophis hammondii foraging behavior
Edward L. Ervin, Robert N. Fisher
2007, Herpetological Review (38) 345-346
Thamnophis hammondii is considered one of the most aquatic of the gartersnakes and is closely associated with creeks and impoundments (Fitch 1940. Univ. California Publ. Zool. 44:1–150) with a diet consisting largely of both the larvae and transformed stages of amphibians (Spea, Bufo, Rana, Pseudacris) and small fish (Oncorhynchus, Gasterosteus,...
Effect of tidal fluctuations on contaminant transfer to the ocean
I.L. Licata, C.D. Langevin, A.M. Dausman
2007, Conference Paper, IAHS-AISH Publication
Variable-density groundwater flow was simulated to examine the effects that tide has on the coastward migration of a contaminant through a freshwater/saltwater interface and toward a coastal ocean boundary. Simulated ocean tides did not significantly affect the total contaminant mass input to the ocean; however, the difference in tidal and...
The effect of long-term spatiotemporal variations in urbanization-induced eutrophication on a benthic ecosystem, Osaka Bay, Japan
Moriaki Yasuhara, Hideo Yamazaki, Akira Tsujimoto, K. Hirose
2007, Limnology and Oceanography (52) 1633-1644
Detailed spatiotemporal patterns of the influence of urbanization-induced eutrophication on a metazoan benthic community in Osaka Bay were determined using sediment cores and fossil ostracode assemblages from the last 200 yr. Results suggest that total abundance of ostracodes increased in the middle part of the bay as a result of...
Temporal trends of young-of-year fishes in Lake Erie and comparison of diel sampling periods
M.A. Stapanian, M.T. Bur, J.V. Adams
2007, Environmental Monitoring and Assessment (129) 169-178
We explored temporal trends of young-of-year (YOY) fishes caught in bottom trawl hauls at an established offshore monitoring site in Lake Erie in fall during 1961–2001. Sampling was conducted during morning, afternoon, and night in each year. Catches per hour (CPH) of alewife (Alosa pseudoharengus) YOY were relatively...
Year-class formation of upper St. Lawrence River northern pike
B.M. Smith, J.M. Farrell, H.B. Underwood, S.J. Smith
2007, North American Journal of Fisheries Management (27) 481-491
Variables associated with year-class formation in upper St. Lawrence River northern pike Esox lucius were examined to explore population trends. A partial least-squares (PLS) regression model (PLS 1) was used to relate a year-class strength index (YCSI; 1974-1997) to explanatory variables associated with spawning and nursery areas (seasonal water level...
Shoreline change as a proxy for subaerial beach volume change
Amy S. Farris, Jeffrey H. List
2007, Journal of Coastal Research (23) 740-748
It is difficult and expensive to calculate changes in sediment volume for large sections of sandy beaches. Shoreline change could be a useful proxy for volume change because it can be collected quickly and relatively easily over long distances. In this paper, we summarize several studies that find a high...
Subspecific variation in the widespread burl-forming Arctostaphylos glandulosa
Jon E. Keeley, Michael C. Vasey, V. Thomas Parker
2007, Madroño (54) 42-62
The genus Arctostaphylos consists mostly of chaparral shrubs known by the common name manzanita, and one of the widest ranging of these is A. glandulosa Eastw., distributed from Baja California to Oregon. Particularly in the southern half of its range it exhibits complex patterns of morphological variation that have long presented taxonomic challenges. Phenetic...
A field assessment of the value of steady shape hydraulic tomography for characterization of aquifer heterogeneities
Geoffrey C. Bohling, James J. Butler Jr., Xiaoyong Zhan, Michael D. Knoll
2007, Water Resources Research (43)
Hydraulic tomography is a promising approach for obtaining information on variations in hydraulic conductivity on the scale of relevance for contaminant transport investigations. This approach involves performing a series of pumping tests in a format similar to tomography. We present a field‐scale assessment of hydraulic tomography in a porous aquifer,...
The role of natural vegetative disturbance in determining stream reach characteristics in central Idaho and western Montana
B.B. Roper, B. Jarvis, J. L. Kershner
2007, Northwest Science (81) 224-238
We evaluated the relationship between natural vegetative disturbance and changes in stream habitat and macroinvertebrate metrics within 33 randomly selected minimally managed watersheds in central Idaho and western Montana. Changes in stream reach conditions were related to vegetative disturbance for the time periods from 1985 to 1993 and 1993 to...
Catch-and-release science and its application to conservation and management of recreational fisheries
S. J. Cooke, H.L. Schramm
2007, Fisheries Management and Ecology (14) 73-79
Catch-and-release angling is a well-established practice in recreational angler behaviour and fisheries management. Accompanying this is a growing body of catch-and-release research that can be applied to reduce injury, mortality and sublethal alterations in behaviour and physiology. Here, the status of catch-and-release research from a symposium on the topic is...
Occurrence of pesticides in water, sediment, and soil from the Yolo Bypass, California
Kelly L. Smalling, James L. Orlando, Kathryn Kuivila
2007, San Francisco Estuary and Watershed Science (5)
The objective of this study was to evaluate the potential sources of pesticides to the Yolo Bypass, including those that could potentially impact critical life stages of resident fish. To assess direct inputs during inundation, pesticide concentrations were analyzed in water and suspended and bed sediment samples collected from source...
Spectroscopic evidence for uranium bearing precipitates in vadose zone sediments at the Hanford 300-area site
Y. Arai, M.A. Marcus, N. Tamura, J.A. Davis, J.M. Zachara
2007, Environmental Science & Technology (41) 4633-4639
Uranium (U) solid-state speciation in vadose zone sediments collected beneath the former North Process Pond (NPP) in the 300 Area of the Hanford site (Washington) was investigated using multi-scale techniques. In 30 day batch experiments, only a small fraction of total U (???7.4%) was released to artificial groundwater solutions equilibrated...
Variable role of aquatic macroinvertebrates in initial breakdown of seasonal leaf litter inputs to a cold-desert river
S. M. Nelson, D.C. Andersen
2007, Southwestern Naturalist (52) 219-228
We used coarse-mesh and fine-mesh leafpacks to examine the importance of aquatic macroinvertebrates in the breakdown of floodplain tree leaf litter that seasonally entered a sand-bedded reach of the sixth-order Yampa River in semiarid Colorado. Leafpacks were positioned off the easily mobilized channel bed, mimicking litter trapped in debris piles....
Effect of horseshoe crab spawning density on nest disturbance and exhumation of eggs: A simulation study
D. R. Smith
2007, Estuaries and Coasts (30) 287-295
Because the Delaware Bay horseshoe crab (Limulus polyphemus) population is managed to provide for dependent species, such as migratory shorebirds, there is a need to understand the process of egg exhumation and to predict eggs available to foraging shorebirds. A simple spatial model was used to simulate horseshoe crab spawning...
Occurrence and nest survival of four thrush species on a managed central Appalachian forest
R.L. Dellinger, P.B. Wood, P.D. Keyser
2007, Forest Ecology and Management (243) 248-258
The wood thrush (Hylocichla mustelina Gmelin) is a species of concern in the central Appalachians, and is sympatric there with three related species, the American robin (Turdus migratorius Linnaeus), hermit thrush (Catharus guttatus Pallas), and veery (Catharus fuscescens Stephens). Our objectives were to quantify use of mature forests and areas...
Coupling contaminants with demography: Effects of lead and selenium in Pacific common eiders
H.M. Wilson, Paul L. Flint, A.N. Powell
2007, Environmental Toxicology and Chemistry (26) 1410-1417
We coupled intensive population monitoring with collection of blood samples from 383 nesting Pacific common eiders (Somateria mollisima v-nigrum) at two locations in Alaska (USA) from 2002 to 2004. We investigated annual, geographic, and within-season variation in blood concentrations of lead and selenium; compared exposure patterns with sympatrically nesting spectacled...
An evaluation of petrogenic hydrocarbons in northern Gulf of Alaska continental shelf sediments - The role of coastal oil seep inputs
J.W. Short, J.J. Kolak, J. R. Payne, G. K. Van Kooten
2007, Organic Geochemistry (38) 643-670
We compared hydrocarbons in water, suspended particulate matter (SPM), and riparian sediment collected from coastal watersheds along the Yakataga foreland with corresponding hydrocarbons in Gulf of Alaska benthic sediments. This comparison allows an evaluation of hydrocarbon contributions to marine sediments from natural oil seeps, coal and organic matter (e.g., kerogen)...
Understanding shallow gas occurrences in the Gulf of Lions
Ana Garcia-Garcia, Tommaso Tesi, Daniel L. Orange, T. Lorenson, Stefano Miserocchi, L. Langone, I. Herbert, J. Dougherty
2007, Geo-Marine Letters (27) 143-154
New coring data have been acquired along the western Gulf of Lions showing anomalous concentrations of methane (up to 95,700 ppm) off the Rhône prodelta and the head of the southern canyons Lacaze-Duthiers and Cap de Creus. Sediment cores were acquired with box and kasten cores during...
Zaphrentis and the Zaphrentidae (Devonian; anthozoa, rugosa)
W. A. Oliver Jr.
2007, Bulletins of American Paleontology (2007) 5-24
Zaphrentis is one of the most widely used names in Paleozoic coral paleontology. Species of "Zaphrentis" have been named from every Paleozoic System except the Cambrian. Variants of the word, such as zaphrentoid, are widely used with varied meanings. Nomenclatural spinoffs are numerous: Neozaphrentis and Heterophrentis are obvious examples, but...
Temporal patterns of diversity: Assessing the biotic and abiotic controls on ant assemblages
R.R. Dunn, C.R. Parker, N.J. Sanders
2007, Biological Journal of the Linnean Society (91) 191-201
In this study, we use 12 months of data from 11 ant assemblages to test whether seasonal variation in ant diversity is governed by either the structuring influences of interspecific competition or environmental conditions. Because the importance of competition might vary along environmental gradients, we also test whether the signature...
Potential ecotoxicological significance of elevated concentrations of strontium in eggshells of passerine birds
Miguel A. Mora, Robert J. Taylor, Bryan L. Brattin
2007, Condor (109) 199-205
We investigated the occurrence and potential ecotoxicological significance of elevated concentrations of strontium (Sr) in eggshells of nine passerine birds from four regions in Arizona. Concentrations of Sr in eggshells ranged from 70 to 1360 µg g−1 dry weight (overall mean = 684 ± 345 SD µg g−1 dw) for the four...
