Evaluation of potential mechanisms of atrazine-induced reproductive impairment in fathead minnow (Pimephales promelas) and Japanese medaka (Oryzias latipes)
Catherine A. Richter, Diana M. Papoulias, Jeffrey J. Whyte, Donald E. Tillitt
2016, Environmental Toxicology and Chemistry (35) 2230-2238
Atrazine has been implicated in reproductive dysfunction of exposed organisms, and previous studies documented decreased egg production in Japanese medaka (Oryzias latipes) and fathead minnows (Pimephales promelas) during 30-d to 38-d exposures to 0.5 µg/L, 5 µg/L, and 50 µg/L atrazine. The authors evaluated possible mechanisms underlying the reduction in egg production. Gene...
Scale-dependent habitat selection and size-based dominance in adult male American alligators
Bradley A. Strickland, Francisco Vilella, Jerrold L. Belant
2016, PLoS ONE 1-16
Habitat selection is an active behavioral process that may vary across spatial and temporal scales. Animals choose an area of primary utilization (i.e., home range) then make decisions focused on resource needs within patches. Dominance may affect the spatial distribution of conspecifics and concomitant habitat selection. Size-dependent social dominance hierarchies...
Insights into shallow magmatic processes at Kīlauea Volcano, Hawaiʻi, from a multiyear continuous gravity time series
Michael P. Poland, Daniele Carbone
2016, Journal of Geophysical Research B: Solid Earth (121) 5477-5492
Continuous gravity data collected near the summit eruptive vent at Kīlauea Volcano, Hawaiʻi, during 2011–2015 show a strong correlation with summit-area surface deformation and the level of the lava lake within the vent over periods of days to weeks, suggesting that changes in gravity reflect variations in volcanic activity. Joint...
Experimental warming in a dryland community reduced plant photosynthesis and soil CO2 efflux although the relationship between the fluxes remained unchanged
Timothy M. Wertin, Jayne Belnap, Sasha C. Reed
2016, Functional Ecology (31) 297-305
1. Drylands represent our planet's largest terrestrial biome and, due to their extensive area, maintain large stocks of carbon (C). Accordingly, understanding how dryland C cycling will respond to climate change is imperative for accurately forecasting global C cycling and future climate. However, it remains difficult to predict how increased...
Characterizing potentially induced earthquake rate changes in the Brawley Seismic Zone, southern California
Andrea L. Llenos, Andrew J. Michael
2016, Bulletin of the Seismological Society of America (106) 2045-2062
The Brawley seismic zone (BSZ), in the Salton trough of southern California, has a history of earthquake swarms and geothermal energy exploitation. Some earthquake rate changes may have been induced by fluid extraction and injection activity at local geothermal fields, particularly at the North Brawley Geothermal Field (NBGF) and at...
Organic petrology and geochemistry of mudrocks from the lacustrine Lucaogou Formation, Santanghu Basin, northwest China: Application to lake basin evolution
Paul C. Hackley, Neil Fishman, Tao Wu, Gregory Baugher
2016, International Journal of Coal Geology (168) 20-34
Exploration for tight oil in the frontier Santanghu Basin of northwest China has resulted in recent commercial discoveries sourced from the lacustrine Upper Permian Lucaogou Formation, already considered a “world class source rock” in the Junggar Basin to the west. Here we apply an integrated analytical program to carbonate-dominated mudrocks...
Maxent modeling for predicting potential distribution of goitered gazelle in central Iran: the effect of extent and grain size on performance of the model
Rasoul Khosravi, Mahmoud-Reza Hemami, Mansoureh Malekian, Alan L. Flint, Lorraine E. Flint
2016, Turkish Journal of Zoology (40) 574-585
The spatial scale of environmental layers is an important factor to consider in developing an understanding of ecological processes. This study employed Maxent modeling to investigate the geographic distribution of goitered gazelle, Gazella subgutturosa (Güldenstädt, 1780), in central Iran using uncorrelated variables at a spatial resolution of 250 m. We...
Persistent slip rate discrepancies in the eastern California (USA) shear zone
Eileen Evans, Wayne R. Thatcher, Frederick Pollitz, Jessica R. Murray
2016, Geology (44) 691-694
Understanding fault slip rates in the eastern California shear zone (ECSZ) using GPS geodesy is complicated by potentially overlapping strain signals due to many sub-parallel strike-slip faults and by inconsistencies with geologic slip rates. The role of fault system geometry in describing ECSZ deformation may be investigated with total variation...
Shale-gas assessment: Comparison of gas-in-place versus performance-based approaches
H. Stueck, David W. Houseknecht, D. Franke, Donald L. Gautier, A. Bahr, S. Ladage
2016, Natural Resources Research (25) 315-329
The recent interest in exploration for shale gas increases the demand for a reliable, compatible resource assessment. Many different assessment methods are used, commonly depending on types and quantity of data available, which may lead to significantly divergent results for the same shale-gas play. This study compares results obtained using...
Global biodiversity monitoring: from data sources to essential biodiversity variables
Vania Proenca, Laura J. Martin, Henrique M. Pereira, Miguel Fernandez, Louise McRae, Jayne Belnap, Monika Böhm, Neil Brummitt, Jaime Garcia-Moreno, Richard D. Gregory, Joao P Honrado, Norbert Jurgens, Michael Opige, Dirk S. Schmeller, Patricia Tiago, Chris A van Sway
2016, Biological Conservation (213) 256-263
Essential Biodiversity Variables (EBVs) consolidate information from varied biodiversity observation sources. Here we demonstrate the links between data sources, EBVs and indicators and discuss how different sources of biodiversity observations can be harnessed to inform EBVs. We classify sources of primary observations into four types: extensive and intensive monitoring schemes,...
Timing of ice retreat alters seabird abundances and distributions in the southeast Bering Sea
Martin Renner, Sigrid Salo, Lisa B. Eisner, Kathy J. Kuletz, Jarrod A. Santora, Patrick Ressler, Carol Ladd, John F. Piatt, Gary S. Drew, George L. Hunt
2016, Biology Letters (12)
Timing of spring sea-ice retreat shapes the southeast Bering Sea food web. We compared summer seabird densities and average bathymetry depth distributions between years with early (typically warm) and late (typically cold) ice retreat. Averaged over all seabird species, densities in early-ice-retreat-years were 10.1% (95% CI: 1.1–47.9%) of that in...
Duration of fuels reduction following prescribed fire in coniferous forests of U.S. national parks in California and the Colorado Plateau
Phillip J. van Mantgem, Laura Lalemand, MaryBeth Keifer, Jeffrey M. Kane
2016, Forest Ecology and Management (379) 265-272
Prescribed fire is a widely used forest management tool, yet the long-term effectiveness of prescribed fire in reducing fuels and fire hazards in many vegetation types is not well documented. We assessed the magnitude and duration of reductions in surface fuels and modeled fire hazards in coniferous forests across nine...
Highly conductive horizons in the Mesoproterozoic Belt-Purcell Basin: Sulfidic early basin strata as key markers of Cordilleran shortening and Eocene extension
Paul A. Bedrosian, Stephen E. Box
2016, Book chapter, Belt basin: Window to Mesoproterozoic Earth
We investigated the crustal structure of the central Mesoproterozoic Belt Basin in northwestern Montana and northern Idaho using a crustal resistivity section derived from a transect of new short- and long-period magnetotelluric (MT) stations. Two- and three-dimensional resistivity models were generated from these data in combination with data collected previously...
Synthesis of common management concerns associated with dam removal
Desiree D. Tullos, Mathias J. Collins, J. Ryan Bellmore, Jennifer A. Bountry, Patrick J. Connolly, Patrick B. Shafroth, Andrew C. Wilcox
2016, Journal of the American Water Resources Association (52) 1179-1206
Managers make decisions regarding if and how to remove dams in spite of uncertainty surrounding physical and ecological responses, and stakeholders often raise concerns about certain negative effects, regardless of whether or not these concerns are warranted at a particular site. We used a dam-removal science database supplemented with other...
Hydrology of flooded and wetland forests
T. M. Williams, Ken W. Krauss, T. Okruszko
D. Amatya, T. M. Williams, L. Bren, C. de Jong, editor(s)
2016, Book chapter, Forest hydrology: Processes, management and assessment
In this chapter we will examine the hydrology of forested areas that are subject to soil saturation by rain, groundwater, or surface flooding. They include mangroves and other tidal forests, the forested portions of peatlands, and tree dominated wetlands defined by the Ramsar Convention (Mathews 1993)....
Application of organic petrography in North American shale petroleum systems: A review
Paul C. Hackley, Brian J. Cardott
2016, International Journal of Coal Geology (163) 8-51
Organic petrography via incident light microscopy has broad application to shale petroleum systems, including delineation of thermal maturity windows and determination of organo-facies. Incident light microscopy allows practitioners the ability to identify various types of organic components and demonstrates that solid bitumen is the dominant organic matter occurring in shale...
Age and growth of round gobies in Lake Huron: Implications for food web dynamics
You J. Duan, Charles P. Madenjian, Cong X. Xie, James S. Diana, Timothy P. O’Brien, Ying M. Zhao, Ji X. He, Steven A. Farha, Bin Huo
2016, Journal of Great Lakes Research (42) 1443-1451
Although the round goby (Neogobius melanostomus) has become established throughout the Laurentian Great Lakes, information is scarce on spatial variation in round goby growth between and within lakes. Based on a sample of 754 specimens captured in 2014, age, growth, and mortality of round gobies at four locations in Lake...
Landsat-7 ETM+ radiometric calibration status
Julia A. Barsi, Brian L. Markham, J. S. Czapla-Myers, Dennis L. Helder, Simon Hook, John R. Schott, Obaidul Haque
2016, Conference Paper, Proceedings Volume 9972, Earth Observing Systems XXI
Now in its 17th year of operation, the Enhanced Thematic Mapper + (ETM+), on board the Landsat-7 satellite, continues to systematically acquire imagery of the Earth to add to the 40+ year archive of Landsat data. Characterization of the ETM+ on-orbit radiometric performance has been on-going since its launch in...
Radiometric calibration updates to the Landsat collection
Esad Micijevic, Obaidul Haque, Nischal Mishra
2016, Conference Paper, Proceedings Volume 9972, Earth Observing Systems XXI
The Landsat Project is planning to implement a new collection management strategy for Landsat products generated at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center. The goal of the initiative is to identify a collection of consistently geolocated and radiometrically calibrated images across the entire Landsat...
Regulation of the hunting season as a tool for adaptive harvest management — First results for pink-footed geese Anser brachyrhynchus
Jesper Madsen, Kevin K. Clausen, Thomas K. Christensen, Fred A. Johnson
2016, Wildlife Biology (22) 204-208
Adjustment of hunting season length is often used to regulate harvest of waterbirds but the effects are disputed. We describe the first results of season length extension on the harvest of the pink-footed goose, which has been selected as the first test case of adaptive harvest management of waterbirds in...
Migratory routes and at-sea threats to Pink-footed Shearwaters
Josh Adams, Jonathan J. Felis, Peter Hodum, Valentina Colodro, Ryan Carle, Verónica López
2016, Conference Paper, Seventh Meeting of the Seabird Bycatch Working Group
The Pink-footed Shearwater (Ardenna creatopus) is a seabird with a breeding range restricted to three islands in Chile and an estimated world population of approximately 56,000 breeding individuals (Muñoz 2011, Oikonos unpublished data). Due to multiple threats on breeding colonies and at-sea, Pink-footed Shearwaters are listed as Endangered by the...
Biochemical and clinical responses of Common Eiders to implanted satellite transmitters
Christopher J. Latty, Tuula E. Hollmen, Margaret R. Petersen, Abby Powell, Russel D. Andrews
2016, The Condor (118) 489-501
Implanted biologging devices, such as satellite-linked platform transmitter terminals (PTTs), have been used widely to delineate populations and identify movement patterns of sea ducks. Although in some cases these ecological studies could reveal transmitter effects on behavior and mortality, experiments conducted under controlled conditions can provide valuable information to understand...
Factors affecting wetland connectivity for wintering semipalmated sandpipers (Calidris pusilla) in the Caribbean
Morgan A. Parks, Jaime A. Collazo, Katsi R. Ramos Alvarez
2016, Waterbirds (39) 250-259
Wetland connectivity provides migratory shorebirds varying options to meet energy requirements to survive and complete their annual cycle. Multiple factors mediate movement and residency of spatially segregated wetlands. Information on these factors is lacking in the tropics, yet such information is invaluable for conservation design. The influence of seven biotic...
Low survival rates of Swan Geese (Anser cygnoides) estimated from neck-collar resighting and telemetry
Chang-Yong Choi, Ki-Sup Lee, Nikolay D. Poyarkov, Jin-Young Park, Hansoo Lee, John Y. Takekawa, Lacy M. Smith, Craig R. Ely, Xin Wang, Lei Cao, Anthony D. Fox, Oleg Goroshko, Nyambaya Batbayar, Diann J. Prosser, Xiangming Xiao
2016, Waterbirds (39) 277-286
Waterbird survival rates are a key component of demographic modeling used for effective conservation of long-lived threatened species. The Swan Goose (Anser cygnoides) is globally threatened and the most vulnerable goose species endemic to East Asia due to its small and rapidly declining population. To address a current knowledge gap...
Seismo-acoustic evidence for an avalanche driven phreatic eruption through a beheaded hydrothermal system: An example from the 2012 Tongariro eruption
A.D. Jolly, P. Jousset, J.J. Lyons, R. Carniel, R. Fournier, B. Fry, C. Miller
2016, Journal of Volcanology and Geothermal Research (286) 331-347
The 6 August 2012 Te Maari eruption comprises a complex eruption sequence including multiple eruption pulses, a debris avalanche that propagated ~ 2 km from the vent, and the formation of a 500 m long, arcuate chasm, located ~ 300 m from the main eruption vent. The eruption included 6 distinct...
