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Author (up) Franklin, M.; Chau, K.; Cushing, L.J.; Johnston, J. url  doi
openurl 
  Title Characterizing flaring from unconventional oil and gas operations in south Texas using satellite observations Type Journal Article
  Year 2019 Publication Environmental Science & Technology Abbreviated Journal Environ Sci Technol  
  Volume 53 Issue 4 Pages 2220-2228  
  Keywords Remote Sensing; petroleum; Texas; United States; VIIRS-DNB; Eagle Ford Shale; flaring; oil and gas  
  Abstract Over the past decade, increases in high-volume hydraulic fracturing for oil and gas extraction in the United States have raised concerns with residents living near wells. Flaring, or the combustion of petroleum products into the open atmosphere, is a common practice associated with oil and gas exploration and production, and has been under-examined as a potential source of exposure. We leveraged data from the Visible Infrared Imaging Spectroradiometer (VIIRS) Nightfire satellite product to characterize the extent of flaring in the Eagle Ford Shale region of south Texas, one of the most productive in the nation. Spatiotemporal hierarchical clustering identified flaring sources, and a regression-based approach combining VIIRS information with reported estimates of vented and flared gas from the Railroad Commission of Texas enabled estimation of flared gas volume at each flare. We identified 43,887 distinct oil and gas flares in the study region from 2012-2016, with a peak in activity in 2014 and an estimated 4.5 billion cubic meters of total gas volume flared over the study period. A comparison with well permit data indicated the majority of flares were associated with oil-producing (82%) and horizontally-drilled (92%) wells. Of the 49 counties in the region, 5 accounted for 71% of the total flaring. Our results suggest flaring may be a significant environmental exposure in parts of this region.  
  Address Department of Preventive Medicine, University of Southern California, Los Angeles California 90032, United States; meredith.franklin(at)usc.edu  
  Corporate Author Thesis  
  Publisher ACS Place of Publication Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0013-936X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:30657671 Approved no  
  Call Number GFZ @ kyba @ Serial 2175  
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Author (up) Hall, A.S. url  doi
openurl 
  Title Acute Artificial Light Diminishes Central Texas Anuran Calling Behavior Type Journal Article
  Year 2016 Publication The American Midland Naturalist Abbreviated Journal Amer. Midland Naturalist  
  Volume 175 Issue 2 Pages 183-193  
  Keywords Animals; frogs; toads; amphibians; anurans; ecology; wildlife; Texas  
  Abstract Male anuran (frog and toad) advertisement calls associate with fitness and can respond to environmental cues such as rain and air temperature. Moonlight is thought to generally decrease call behaviors – perhaps as a response to increased perceived risk of predation – and this study sought to determine if artificial lighting produces a similar pattern. Using a handheld spotlight, light was experimentally introduced to natural anuran communities in ponds and streams. Custom call surveys where then used to measure anuran calls in paired unlit and lit conditions at six locations in central Texas. Among seven species heard, the number of frogs calling and call index declined in response to the acute light input. Local weather conditions could not explain differences between numbers of frogs calling between species, sites, survey order, or lighting order suggesting the main effect on number calling was light treatment. It appears acute artificial light alone can change calling behavior within several species in natural, mixed species assemblages.  
  Address Department of Biology, The University of Texas at Arlington, Arlington, Texas 76019; allopatry(at)gmail.com  
  Corporate Author Thesis  
  Publisher BioOne Place of Publication Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0003-0031 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 1455  
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Author (up) Henn, M.; Nichols, H.; Zhang, Y.; Bonner, T.H. url  doi
openurl 
  Title Effect of artificial light on the drift of aquatic insects in urban central Texas streams Type Journal Article
  Year 2014 Publication Journal of Freshwater Ecology Abbreviated Journal Journal of Freshwater Ecology  
  Volume 29 Issue 3 Pages 307-318  
  Keywords light pollution; stream ecology; urban ecology; drift; abiotic factors; Baetidae; Chironomidae; insects; Texas; Simuliidae; Edwards Plateau; light at night; ecology  
  Abstract Light pollution can reduce night time drift of larval aquatic insects in urban streams by disrupting their circadian rhythms. Previous studies on larval insect drift show that disruption in drift leads to changes in reproduction as well as intraspecific and interspecific interactions. The purpose of this study was to conduct a preliminary investigation into the effects of extreme artificial light on insect drift in urbanized, high clarity spring systems of the karst Edwards Plateau, TX. We quantified taxa richness, diversity, and abundance in aquatic insect night time drift under two treatments (ambient night time light and artificial light addition) and among five streams using a paired design. Richness and diversity of drifting aquatic insects were similar between treatments but abundance was 37% less in the light addition treatment than that of the control. Effects of light addition on mean abundance was more notable in large streams with a 58% decrease in Simuliidae (compared to that of the control) and 51% decrease in Baetidae. Reduced drift from light addition suggests the potential of artificial lighting disrupting insect drift and consequently community structure. Results of this experiment support a growing body of knowledge on how urbanized systems influence stream communities.  
  Address Department of Biology/Aquatic Station, Texas State University, San Marcos, TX, USA  
  Corporate Author Thesis  
  Publisher Taylor & Francis Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0270-5060 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 312  
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