Traces and burrowing behaviors of the Cicada nymph Cicadetta calliope: Neoichnology and paleoecological significance of extant soil-dwelling insects
J.J. Smith, S.T. Hasiotis
2008, Palaios (23) 503-513
This study documents the traces and burrowing behaviors of nymphs of the prairie cicada Cicadetta calliope (Hemiptera: Cicadidae), as observed in neoichnological experiments. Cicada nymphs were collected from the C horizons of sandy Fluvents along the Kansas River east of Lawrence, Kansas. The nymphs appeared to be fifth instars, 13-17...
Genetic identity of brook trout in Lake Superior south shore streams: Potential for genetic monitoring of stocking and rehabilitation efforts
Brian L. Sloss, Martin J. Jennings, R. Franckowiak, D.M. Pratt
2008, Transactions of the American Fisheries Society (137) 1244-1251
Rehabilitation of migratory ('coaster') brook trout Salvelinus fontinalis along Lake Superior's south shore is a topic of high interest among resource stakeholders and management agencies. Proposed strategies for rehabilitation of this brook trout life history variant in Wisconsin include supplemental stocking, watershed management, habitat rehabilitation, harvest regulations, or a combination...
Evidence of Late Pliocene-Early Pleistocene marine environments in the deep subsurface of the Lihue Basin, Kauai, Hawaii
S. K. Izuka, J.M. Resig
2008, Palaios (23) 442-451
Cuttings recovered from two deep exploratory wells in the Lihue Basin, Kauai, Hawaii, include fossiliferous marine deposits that offer an uncommon opportunity to study paleoenvironments from the deep subsurface in Hawaii and interpret the paleogeography and geologic history of Kauai. These deposits indicate that two marine incursions gave rise to...
A plastid gene phylogeny of the non-photosynthetic parasitic Orobanche (Orobanchaceae) and related genera
J.-M. Park, J.-F. Manen, A.E. Colwell, G.M. Schneeweiss
2008, Journal of Plant Research (121) 365-376
The phylogenetic relationships of the non-photosynthetic Orobanche sensu lato (Orobanchaceae), which includes some of the economically most important parasitic weeds, remain insufficiently understood and controversial. This concerns both the phylogenetic relationships within the genus, in particular its monophyly or lack thereof, and the relationships to other holoparasitic genera such as...
Fish assemblages of the Casiquiare River, a corridor and zoogeographical filter for dispersal between the Orinoco and Amazon basins
K.O. Winemiller, H. Lopez-Fernandez, D.C. Taphorn, L.G. Nico, A.B. Duque
2008, Journal of Biogeography (35) 1551-1563
Aim: The aim of this study was to determine whether the Casiquiare River functions as a free dispersal corridor or as a partial barrier (i.e. filter) for the interchange of fish species of the Orinoco and Negro/Amazon basins using species assemblage patterns according to geographical location and environmental features. Location:...
Photoreduction fuels biogeochemical cycling of iron in Spain's acid rivers
C.H. Gammons, D. A. Nimick, S.R. Parker, D.M. Snyder, R. Blaine McCleskey, R. Amils, S.R. Poulson
2008, Chemical Geology (252) 202-213
A number of investigations have shown that photoreduction of Fe(III) causes midday accumulations of dissolved Fe(II) in rivers and lakes, leading to large diel (24-h) fluctuations in the concentration and speciation of total dissolved iron. Less well appreciated is the importance of photoreduction in...
Using chemical and microbiological indicators to track the impacts from the land application of treated municipal wastewater and other sources on groundwater quality in a karstic springs basin
B. G. Katz, Dale W. Griffin
2008, Environmental Geology (55) 801-821
Multiple chemical constituents (nutrients; N, O, H, C stable isotopes; 64 organic wastewater compounds, 16 pharmaceutical compounds) and microbiological indicators were used to assess the impact on groundwater quality from the land application of approximately 9.5 million liters per day of treated municipal sewage effluent to a sprayfield in the...
Classification tree models for predicting distributions of michigan stream fish from landscape variables
P.J. Steen, T.G. Zorn, P.W. Seelbach, J.S. Schaeffer
2008, Transactions of the American Fisheries Society (137) 976-996
Traditionally, fish habitat requirements have been described from local-scale environmental variables. However, recent studies have shown that studying landscape-scale processes improves our understanding of what drives species assemblages and distribution patterns across the landscape. Our goal was to learn more about constraints on the distribution of Michigan stream fish by...
A coupled model approach to reduce nonpoint-source pollution resulting from predicted urban growth: A case study in the Ambos Nogales watershed
L.M. Norman, D.P. Guertin, M. Feller
2008, Urban Geography (29) 496-516
The development of new approaches for understanding processes of urban development and their environmental effects, as well as strategies for sustainable management, is essential in expanding metropolitan areas. This study illustrates the potential of linking urban growth and watershed models to identify problem areas and support long-term watershed planning. Sediment...
Changes in the soil C cycle at the arid-hyperarid transition in the Atacama Desert
S.A. Ewing, J. L. Macalady, K. Warren-Rhodes, C.P. McKay, Ronald Amundson
2008, Journal of Geophysical Research G: Biogeosciences (113)
We examined soil organic C (OC) turnover and transport across the rainfall transition from a biotic, arid site to a largely abiotic, hyperarid site. With this transition, OC concentrations decrease, and C cycling slows precipitously, both in surface horizons and below ground. The concentration and isotopic character of soil OC...
Coarse-clast ridge complexes of the Caribbean: A preliminary basis for distinguishing tsunami and storm-wave origins
R.A. Morton, B. M. Richmond, B. E. Jaffe, G. Gelfenbaum
2008, Journal of Sedimentary Research (78) 624-637
Coastal gravel-ridge complexes deposited on islands in the Caribbean Sea are recorders of past extreme-wave events that could be associated with either tsunamis or hurricanes. The ridge complexes of Bonaire, Jamaica, Puerto Rico (Isla de Mona), and Guadeloupe consist of polymodal clasts ranging in size from sand to coarse boulders...
Range-wide phylogeographic analysis of the spotted frog complex (Rana luteiventris and Rana pretiosa) in northwestern North America
W.C. Funk, C.A. Pearl, H.M. Draheim, M.J. Adams, T.D. Mullins, S. M. Haig
2008, Molecular Phylogenetics and Evolution (49) 198-210
The dynamic geological and climatic history of northwestern North America has made it a focal region for phylogeography. We conducted a range-wide phylogeographic analysis of the spotted frog complex (Rana luteiventris and Rana pretiosa) across its range in northwestern North America to understand its evolutionary history and the distribution of...
Depositional settings of sand beaches along whitewater rivers
K.R. Vincent, E.D. Andrews
2008, River Research and Applications (24) 771-788
The numbers and sizes of sand beaches suitable for recreation along selected whitewater rivers in the western United States depend on sand concentrations, range of discharge and the size, frequency and type of depositional settings. River-width expansions downstream from constrictions are the predominant depositional setting for sand beaches in the...
Use of complex hydraulic variables to predict the distribution and density of unionids in a side channel of the Upper Mississippi River
J. J. Steuer, T.J. Newton, S. J. Zigler
2008, Hydrobiologia (610) 67-82
Previous attempts to predict the importance of abiotic and biotic factors to unionids in large rivers have been largely unsuccessful. Many simple physical habitat descriptors (e.g., current velocity, substrate particle size, and water depth) have limited ability to predict unionid density. However, more recent studies have found that complex hydraulic...
The arctic water resource vulnerability index: An integrated assessment tool for community resilience and vulnerability with respect to freshwater
L. Alessa, A. Kliskey, R. Lammers, C. Arp, D. White, L. Hinzman, R. Busey
2008, Environmental Management (42) 523-541
People in the Arctic face uncertainty in their daily lives as they contend with environmental changes at a range of scales from local to global. Freshwater is a critical resource to people, and although water resource indicators have been developed that operate from regional to global scales and for midlatitude...
Geochemical evidence for hydroclimatic variability over the last 2460 years from Crevice Lake in Yellowstone National Park, USA
L.R. Stevens, W.E. Dean
2008, Quaternary International (188) 139-148
A 2460-year-long hydroclimatic record for Crevice Lake, Yellowstone National Park, Montana was constructed from the ??18O values of endogenic carbonates. The ??18O record is compared to the Palmer Hydrologic Drought Index (PHDI) and Pacific Decadal Oscillation (PDO) indices, as well as inferred discharge of the Yellowstone River. During the last...
Maximizing detection probability of Wetland-dependent birds during point-count surveys in northwestern Florida
C.P. Nadeau, C.J. Conway, B.S. Smith, T.E. Lewis
2008, Wilson Journal of Ornithology (120) 513-518
We conducted 262 call-broadcast point-count surveys (1-6 replicate surveys on each of 62 points) using standardized North American Marsh Bird Monitoring Protocols between 31 May and 7 July 2006 on St. Vincent National Wildlife Refuge, an island off the northwest coast of Florida. We conducted double-blind multiple-observer surveys, paired morning...
A 2650-year-long record of environmental change from northern Yellowstone National Park based on a comparison of multiple proxy data
C. Whitlock, W. Dean, J. Rosenbaum, L. Stevens, S. Fritz, B. Bracht, M. Power
2008, Quaternary International (188) 126-138
Geochemical, stable-isotope, pollen, charcoal, and diatom records were analyzed at high-resolution in cores obtained from Crevice Lake, a varved-sediment lake in northern Yellowstone National Park. The objective was to reconstruct the ecohydrologic, vegetation, and fire history of the watershed for the last 2650 years to better understand past climate variations...
Numerical modeling of higher order magnetic moments in UXO discrimination
V. Sanchez, L. Yaoguo, M.N. Nabighian, D.L. Wright
2008, IEEE Transactions on Geoscience and Remote Sensing (46) 2568-2583
The surface magnetic anomaly observed in unexploded ordnance (UXO) clearance is mainly dipolar, and consequently, the dipole is the only magnetic moment regularly recovered in UXO discrimination. The dipole moment contains information about the intensity of magnetization but lacks information about the shape of the target. In contrast, higher order...
Ocean wavenumber estimation from wave-resolving time series imagery
N.G. Plant, K. T. Holland, M.C. Haller
2008, IEEE Transactions on Geoscience and Remote Sensing (46) 2644-2658
We review several approaches that have been used to estimate ocean surface gravity wavenumbers from wave-resolving remotely sensed image sequences. Two fundamentally different approaches that utilize these data exist. A power spectral density approach identifies wavenumbers where image intensity variance is maximized. Alternatively, a cross-spectral correlation approach identifies wavenumbers where...
Characterization of 13 microsatellite loci for the deep-sea coral, Lophelia pertusa (Linnaeus 1758), from the western North Atlantic Ocean and Gulf of Mexico
C.L. Morrison, M.S. Eackles, Robin L. Johnson, T.L. King
2008, Molecular Ecology Resources (8) 1037-1039
A suite of 13 polymorphic tri- and tetranucleotide microsatellite loci were isolated from the ahermatypic deep-sea coral, Lophelia pertusa. Among 51 individuals collected from three disjunct oceanic regions, allelic diversity ranged from six to 38 alleles and averaged 9.1 alleles per locus. Observed heterozygosity ranged from 9.1 to 96.8% and averaged...
Effects of weather on survival in populations of boreal toads in Colorado
R. D. Scherer, E. Muths, B.A. Lambert
2008, Journal of Herpetology (42) 508-517
Understanding the relationships between animal population demography and the abiotic and biotic elements of the environments in which they live is a central objective in population ecology. For example, correlations between weather variables and the probability of survival in populations of temperate zone amphibians may be broadly applicable to several...
Patch-reef morphology as a proxy for Holocene sea-level variability, Northern Florida Keys, USA
J. C. Brock, M. Palaseanu-Lovejoy, C. W. Wright, A. Nayegandhi
2008, Coral Reefs (27) 555-568
A portion of the northern Florida Keys reef tract was mapped with the NASA Experimental Advanced Airborne Research Lidar (EAARL) and the morphology of patch reefs was related to variations in Holocene sea level. Following creation of a lidar digital elevation model (DEM), geospatial analyses delineated morphologic attributes of 1,034...
Host mating system and the spread of a disease-resistant allele in a population
D.L. DeAngelis, Jennifer M. Koslow, J. Jiang, S. Ruan
2008, Theoretical Population Biology (74) 191-198
The model presented here modifies a susceptible-infected (SI) host-pathogen model to determine the influence of mating system on the outcome of a host-pathogen interaction. Both deterministic and stochastic (individual-based) versions of the model were used. This model considers the potential consequences of varying mating systems on the rate of spread...
Multi-proxy evidence for Late Pleistocene-Holocene climatic and environmental changes in Lop-Nur, Xinjiang, Northwest China
C. Luo, D. Yang, Z. Peng, Z. Zhang, L. Weiguo, J. He, C. Zhou
2008, Chinese Journal of Geochemistry (27) 257-264
A 10.35-m-long sediment core from the Luobei depression in Lop-Nur, Xinjiang, Northwest China, provides detailed information about environmental changes during the Late Pleistocene. The samples taken every 5 cm of the core were analyzed for 10 environmental proxies, including magnetic susceptibility, granularity, chroma, carbonate and loss on ignition (LOI), and...
