Relation of initial spacing and relative stand density indices to stand characteristics in a Douglas-fir plantation spacing trial
Robert O. Curtis, Sheel Bansal, Constance A. Harrington
2016, Research Paper PNW-RP-607
This report presents updated information on a 1981 Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) plantation spacing trial at 33 years from planting. Stand statistics at the most recent measurement were compared for initial spacing of 1 through 6 meters and associated relative densities. There was no clear relationship...
Tidal hydrodynamics under future sea level rise and coastal morphology in the Northern Gulf of Mexico
Davina Passeri, Scott C. Hagen, Nathaniel G. Plant, Matthew V. Bilskie, Stephen C. Medeiros, Karim Alizad
2016, Earth's Future (4) 159-176
This study examines the integrated influence of sea level rise (SLR) and future morphology on tidal hydrodynamics along the Northern Gulf of Mexico (NGOM) coast including seven embayments and three ecologically and economically significant estuaries. A large-domain hydrodynamic model was used to simulate astronomic tides for present and future conditions...
Enriched groundwater seeps in two Vermont headwater catchments are hotspots of nitrate turnover
Amninder J. Kaur, Donald S. Ross, James B. Shanley, Anna R. Yatzor
2016, Wetlands (36) 237-249
Groundwater seeps in upland catchments are often enriched relative to stream waters, higher in pH, Ca2+ and sometimes NO3¯. These seeps could be a NO3¯ sink because of increased denitrification potential but may also be ‘hotspots’ for nitrification because of the relative enrichment. We compared seep soils with nearby well-drained...
Movement and survival of an amphibian in relation to sediment and culvert design
R.K Honeycutt, W.H. Lowe, Blake R. Hossack
2016, Journal of Wildlife Management (80) 761-770
Habitat disturbance from stream culverts can affect aquatic organisms by increasing sedimentation or forming barriers to movement. Land managers are replacing many culverts to reduce these negative effects, primarily for stream fishes. However, these management actions are likely to have broad implications for many organisms, including amphibians in small streams....
Evaluating potential artefacts of photo-reversal on behavioral studies with nocturnal invasive sea lamprey (Petromyzon marinus)
Matthew Barnett, Istvan Imre, C. Michael Wagner, Richard T. Di Rocco, Nicholas S. Johnson, Grant E. Brown
2016, Canadian Journal of Zoology (94) 405-410
Sea lampreys (Petromyzon marinus L., 1758) are nocturnal, so experiments evaluating their behaviour to chemosensory cues have typically been conducted at night. However, given the brief timeframe each year that adult P. marinus are available for experimentation, we investigated whether P. marinus exposed to a 12 h shifted diurnal cycle (reversed photoperiod) could be tested...
Managing nutrients, water, and energy for producing more food with low pollution (MoFoLoPo); What would success look like?
Jill Baron
2016, Environmental Development (18) 52-53
Synthetic nitrogen (N) fertilizer has enabled modern agriculture to greatly improve human nutrition during the 20th century, but it has also created unintended human health and environmental pollution challenges for the 21st century. Averaged globally, about half of the fertilizer N applied to farms is removed with the crops, while...
Multi-laboratory survey of qPCR enterococci analysis method performance in U.S. coastal and inland surface waters
Richard A. Haugland, Shawn Siefring, Manju Varma, Kevin H. Oshima, Mano Sivaganesan, Yiping Cao, Meredith Raith, John Griffith, Stephen B. Weisberg, Rachel T. Noble, A. Denene Blackwood, Julie Kinzelman, Tamara Anan’eva, Rebecca N. Bushon, Erin A. Stelzer, Valarie J. Harwood, Katrina V. Gordon, Christopher Sinigalliano
2016, Journal of Microbiological Methods (123) 114-125
Quantitative polymerase chain reaction (qPCR) has become a frequently used technique for quantifying enterococci in recreational surface waters, but there are several methodological options. Here we evaluated how three method permutations, type of mastermix, sample extract dilution and use of controls in results calculation, affect method reliability among multiple laboratories...
Informing Lake Erie agriculture nutrient management via scenario evaluation
Donald Scavia, Margaret Kalcic, Rebecca Logsdon Muenich, Noel Aloysius, Jeffrey Arnold, Chelsie Boles, Remegio Confesor, Joseph DePinto, Marie Gildow, Jay Martin, Jennifer Read, Todd Redder, Dale M. Robertson, Scott P. Sowa, Yu-Chen Wang, Michael White, Haw Yen
2016, Report
Harmful algal blooms (HABs) have been increasing in extent and intensity in the western basin of Lake Erie. The cyanobacteria Microcystis produces toxins that pose serious threats to animal and human health, resulting in beach closures and impaired water supplies, and have even forced a “do not drink” advisory for...
Detailed mapping and rupture implications of the 1 km releasing bend in the Rodgers Creek Fault at Santa Rosa, northern California
Suzanne Hecker, Victoria E. Langenheim, Robert Williams, Christopher S. Hitchcock, Stephen B. DeLong
2016, Bulletin of the Seismological Society of America (106) 575-594
Airborne light detection and ranging (lidar) topography reveals for the first time the trace of the Rodgers Creek fault (RCF) through the center of Santa Rosa, the largest city in the northern San Francisco Bay area. Vertical deformation of the Santa Rosa Creek floodplain expresses a composite pull‐apart basin beneath...
Population size and stopover duration estimation using mark–resight data and Bayesian analysis of a superpopulation model
James E. Lyons, William L. Kendall, J. Andrew Royle, Sarah J. Converse, Brad A. Andres, Joseph B. Buchanan
2016, Biometrics (72) 262-271
We present a novel formulation of a mark–recapture–resight model that allows estimation of population size, stopover duration, and arrival and departure schedules at migration areas. Estimation is based on encounter histories of uniquely marked individuals and relative counts of marked and unmarked animals. We use a Bayesian analysis of a...
Avian malaria in a boreal resident species: long-term temporal variability, and increased prevalence in birds with avian keratin disorder
Laura C. Wilkinson, Colleen M. Handel, Caroline R. Van Hemert, Claire Loiseau, Ravinder N. M. Sehgal
2016, International Journal for Parasitology (16) 281-290
The prevalence of vector-borne parasitic diseases is widely influenced by biological and ecological factors. Environmental conditions such as temperature and precipitation can have a marked effect on haemosporidian parasites (Plasmodium spp.) that cause malaria and those that cause other malaria-like diseases in birds. However, there have been few long-term studies monitoring...
Late Holocene expansion of Ponderosa pine (Pinus ponderosa) in the Central Rocky Mountains, USA
Jodi R. Norris, Julio L. Betancourt, Stephen T. Jackson
2016, Journal of Biogeography (43) 778-790
"Aim: Ponderosa pine (Pinus ponderosa) experienced one of the most extensive and rapid post-glacial plant migrations in western North America. We used plant macrofossils from woodrat (Neotoma) middens to reconstruct its spread in the Central Rocky Mountains, identify other vegetation changes coinciding with P. ponderosa expansion at the same sites,...
Aeshnid dragonfly larvae as bioindicators of methylmercury contamination in aquatic systems impacted by elevated sulfate loading
Jeffrey D. Jeremiason, T. K. Reiser, R. A. Weitz, M.E. Berndt, George R. Aiken
2016, Ecotoxicology (25) 456-468
Methylmercury (MeHg) levels in dragonfly larvae and water were measured over two years in aquatic systems impacted to varying degrees by sulfate releases related to iron mining activity. This study examined the impact of elevated sulfate loads on MeHg concentrations and tested the use of MeHg in dragonfly larvae as...
A multiagency and multijurisdictional approach to mapping the glacial deposits of the Great Lakes region in three dimensions
Richard C. Berg, Steven E. Brown, Jason F. Thomason, Nancy R. Hasenmueller, Sally L. Letsinger, Kevin A. Kincare, John M. Esch, Alan E. Kehew, Harvey Thorleifson, Andrew Kozlowski, Brian C. Bird, Richard R. Pavey, Andy F. Bajc, Abigail K. Burt, Gary M. Fleeger, Eric C. Carson
2016, GSA Special Papers (520) 415-447
The Great Lakes Geologic Mapping Coalition (GLGMC), consisting of state geological surveys from all eight Great Lakes states, the Ontario Geological Survey, and the U.S. Geological Survey, was conceived out of a societal need for unbiased and scientifically defensible geologic information on the shallow subsurface, particularly the delineation, interpretation, and...
Erratum to Surface‐wave green’s tensors in the near field
Matthew M. Haney, Hisashi Nakahara
2016, Bulletin of the Seismological Society of America (106) 816-818
Haney and Nakahara (2014) derived expressions for surface‐wave Green’s tensors that included near‐field behavior. Building on the result for a force source, Haney and Nakahara (2014) further derived expressions for a general point moment tensor source using the exact Green’s tensors. However, it has come to our attention that, although...
Evidence for partial melt in the crust beneath Mt. Paektu (Changbaishan), Democratic People’s Republic of Korea and China
Ri Kyong-Song, James O. S. Hammond, Ko Chol-Nam, Kim Hyok, Yun Yong-Gun, Pak Gil-Jong, Ri Chong-Song, Clive Oppenheimer, Kosima W. Liu, Kayla D. Iacovino, Ryu Kum-Ran
2016, Science Advances (2)
Mt. Paektu (also known as Changbaishan) is an enigmatic volcano on the border between the Democratic People’s Republic of Korea (DPRK) and China. Despite being responsible for one of the largest eruptions in history, comparatively little is known about its magmatic evolution, geochronology, or underlying structure. We present receiver function...
Low soil moisture during hot periods drives apparent negative temperature sensitivity of soil respiration in a dryland ecosystem: A multi-model comparison
Colin Tucker, Sasha C. Reed
2016, Biogeochemistry (128) 155-169
Arid and semiarid ecosystems (drylands) may dominate the trajectory of biosphere-to-atmosphere carbon (C) exchange, and understanding dryland CO2 efflux is important for C cycling at the global-scale. However, unknowns remain regarding how temperature and moisture interact to regulate dryland soil respiration (R s ), while ‘islands of fertility’ in drylands create spatially heterogeneous R s ....
Increasing influence of air temperature on upper Colorado River streamflow
Connie A. Woodhouse, Gregory T. Pederson, Kiyomi Morino, Stephanie A. McAfee, Gregory J. McCabe
2016, Geophysical Research Letters (43) 2174-2181
This empirical study examines the influence of precipitation, temperature, and antecedent soil moisture on upper Colorado River basin (UCRB) water year streamflow over the past century. While cool season precipitation explains most of the variability in annual flows, temperature appears to be highly influential under certain conditions, with the role...
Growth, survival, longevity, and population size of the Big Mouth Cave salamander (Gyrinophilus palleucus necturoides) from the type locality in Grundy County, Tennessee, USA
Matthew L. Niemiller, Brad M. Glorioso, Dante B. Fenolio, R. Graham Reynolds, Steven J. Taylor, Brian T. Miller
2016, Copeia (104) 35-41
Salamander species that live entirely in subterranean habitats have evolved adaptations that allow them to cope with perpetual darkness and limited energy resources. We conducted a 26-month mark–recapture study to better understand the individual growth and demography of a population of the Big Mouth Cave Salamander (Gyrinophilus palleucus necturoides). We...
Does urban sprawl hold down upward mobility?
R. Ewing, Shima Hamidi, James B. Grace, Y. Wei
2016, Landscape and Urban Planning (148) 80-88
Contrary to the general perception, the United States has a much more class-bound society than other wealthy countries. The chance of upward mobility for Americans is just half that of the citizens of the Denmark and many other European countries. In addition to other influences, the built environment may contribute...
The Chief Joseph Hatchery Program 2013 Annual Report
Casey Baldwin, Andrea Pearl, Matthew Laramie, John Rohrback, Pat Phillips, Keith Wolf
2016, Report
The Chief Joseph Hatchery is the fourth hatchery obligated under the Grand Coulee Dam/Dry Falls project, originating in the 1940s. Leavenworth, Entiat, and Winthrop National Fish Hatcheries were built and operated as mitigation for salmon blockage at Grand Coulee Dam, but the fourth hatchery was not built, and the obligation...
Isotopic incorporation and the effects of fasting and dietary lipid content on isotopic discrimination in large carnivorous mammals
Karyn D. Rode, Craig A. Stricker, Joy Erlenbach, Charles T. Robbins, Seth Cherry, Seth D. Newsome, Amy Cutting, Shannon Jensen, Gordon Stenhouse, Matt Brooks, Amy Hash, Nicole Nicassio
2016, Physiological and Biochemical Zoology (89) 182-197
There has been considerable emphasis on understanding isotopic discrimination for diet estimation in omnivores. However, discrimination may differ for carnivores, particularly species that consume lipid-rich diets. Here, we examined the potential implications of several factors when using stable isotopes to estimate the diets of bears, which can consume lipid-rich diets...
Volcano deformation source parameters estimated from InSAR: Sensitivities to uncertainties in seismic tomography
Timothy Masterlark, Theodore Donovan, Kurt L. Feigl, Matthew M. Haney, Clifford H. Thurber, Sui Tung
2016, Journal of Geophysical Research B: Solid Earth (121) 3002-3016
The eruption cycle of a volcano is controlled in part by the upward migration of magma. The characteristics of the magma flux produce a deformation signature at the Earth's surface. Inverse analyses use geodetic data to estimate strategic controlling parameters that describe the position and pressurization of a magma chamber...
Seismic site characterization of an urban dedimentary basin, Livermore Valley, California: Site tesponse, basin-edge-induced surface waves, and 3D simulations
Stephen H. Hartzell, Alena L. Leeds, Leonardo Ramirez-Guzman, James P. Allen, Robert G. Schmitt
2016, Bulletin of the Seismological Society of America (103) 609-631
Thirty‐two accelerometers were deployed in the Livermore Valley, California, for approximately one year to study sedimentary basin effects. Many local and near‐regional earthquakes were recorded, including the 24 August 2014 Mw 6.0 Napa, California, earthquake. The resulting ground‐motion data set is used to quantify the seismic response of the Livermore basin, a...
Role of large- and fine-scale variables in predicting catch rates of larval Pacific lamprey in the Willamette Basin, Oregon
Luke Schultz, Mariah P. Mayfield, Gabe T. Sheoships, Lance A. Wyss, Benjamin J. Clemens, Steven L. Whitlock, Carl B. Schreck
2016, Ecology of Freshwater Fish (25) 261-271
Pacific lamprey Entosphenus tridentatus is an anadromous fish native to the Pacific Northwest of the USA. That has declined substantially over the last 40 years. Effective conservation of this species will require an understanding of the habitat requirements for each life history stage. Because its life cycle contains extended freshwater rearing (3–8 years), the...
