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https://www.readbyqxmd.com/read/29349499/spatial-coverage-of-mangrove-communities-in-the-arabian-gulf
#1
Hanan Almahasheer
Mangroves are the natural protectors of the coast, carbon sinks, and a nursery to many terrestrial as well as aquatic organisms. Different effects caused by natural forces together with anthropogenic factors have reduced mangrove cover on a global scale, yet little is known about the overall surface covered by mangroves in the Arabian Gulf. Therefore, the aim of this study was to examine their spatial coverage and distribution along the Gulf coastlines, using 25 satellite imagery recently acquired from Landsat 8 data for the year 2017...
January 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29348633/contrasting-patterns-of-prehistoric-human-diet-and-subsistence-in-northernmost-europe
#2
Mirva Pääkkönen, Auli Bläuer, Bjørnar Olsen, Richard P Evershed, Henrik Asplund
Current archaeological evidence indicates the transition from hunting-fishing-gathering to agriculture in Northern Europe was a gradual process. This transition was especially complex in the prehistoric North Fennoscandian landscape where the high latitude posed a challenge to both domestic animal breeding and cereal cultivation. The conditions varied, the coastal dwellers had access to rich marine resources and enjoyed a milder climate due to the Gulf Stream, while those living in the inland Boreal forest zone faced longer and colder winters and less diversity in animal and plant resources...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29341194/generation-of-red-drum-sciaenops-ocellatus-hematology-reference-intervals-with-a-focus-on-identified-outliers
#3
Kendal E Harr, Kristina Deak, Steven A Murawski, Drury R Reavill, Ryan A Takeshita
BACKGROUND: The Deepwater Horizon (DWH) oil spill in 2010 released millions of barrels of crude oil into the northern Gulf of Mexico, exposing numerous species of animals to the toxic components of oil. A comprehensive assessment of morbidity and mortality caused by DWH oil exposure was undertaken by the DWH Natural Resource Damage Trustees to characterize ecosystem damages. OBJECTIVES: This study aimed to characterize normal hematologic RIs in red drum fish with blood cell descriptions, and to demonstrate the importance of identifying and removing outliers when generating RI...
January 17, 2018: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/29340153/temporal-migration-patterns-between-natal-locations-of-ruby-throated-hummingbirds-archilochus-colubris-and-their-gulf-coast-stopover-site
#4
Theodore J Zenzal, Andrea J Contina, Jeffrey F Kelly, Frank R Moore
Background: Autumn latitudinal migrations generally exhibit one of two different temporal migration patterns: type 1 where southern populations migrate south before northern populations, or type 2 where northern populations overtake southern populations en route. The ruby-throated hummingbird (Archilochus colubris) is a species with an expansive breeding range, which allows opportunities to examine variation in the timing of migration. Our objective was to determine a relationship between natal origin of ruby-throated hummingbirds and arrival at a Gulf coast stopover site; and if so, what factors, such as differences in body size across the range as well as the cost of migration, might drive such a pattern...
2018: Movement Ecology
https://www.readbyqxmd.com/read/29335757/total-mercury-in-squalid-callista-megapitaria-squalida-from-the-sw-gulf-of-california-mexico-tissue-distribution-and-human-health-risk
#5
Abril K Romo-Piñera, Ofelia Escobar-Sánchez, Jorge Ruelas-Inzunza, Martín G Frías-Espericueta
We evaluated the total Hg concentration in different tissues of squalid callista Megapitaria squalida in order to measure Hg distribution in tissue and to estimate human health risk. Samples were obtained by free diving in the SW Gulf of California, Mexico. Concentrations are given on a wet weight basis. A total of 89 squalid callista specimens were obtained, presenting an average Hg concentration of 0.07 ± 0.04 µg g-1. There were no significant differences (p > 0.05) in Hg concentration between tissues (visceral mass = 0...
January 15, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29334170/representing-causal-knowledge-in-environmental-policy-interventions-advantages-and-opportunities-for-qualitative-influence-diagram-applications
#6
John F Carriger, Brian E Dyson, William H Benson
This article develops and explores a methodology for using qualitative influence diagrams in environmental policy and management to support decision making efforts that minimize risk and increase resiliency. Influence diagrams are representations of the conditional aspects of a problem domain. Their graphical properties are useful for structuring causal knowledge relevant to policy interventions and can be used to enhance inference and inclusivity of multiple viewpoints. Qualitative components of influence diagrams are beneficial tools for identifying and examining the interactions among the critical variables in complex policy development and implementation...
January 15, 2018: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/29334168/representing-causal-knowledge-in-environmental-policy-interventions-advantages-and-opportunities-for-qualitative-influence-diagram-applications
#7
John F Carriger, Brian E Dyson, William H Benson
This article develops and explores a methodology for using qualitative influence diagrams in environmental policy and management to support decision making efforts that minimize risk and increase resiliency. Influence diagrams are representations of the conditional aspects of a problem domain. Their graphical properties are useful for structuring causal knowledge relevant to policy interventions and can be used to enhance inference and inclusivity of multiple viewpoints. Qualitative components of influence diagrams are beneficial tools for identifying and examining the interactions among the critical variables in complex policy development and implementation...
January 15, 2018: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/29329329/prevalence-risk-factors-and-molecular-evaluation-of-hepatitis-e-virus-infection-among-pregnant-women-resident-in-the-northern-shores-of-persian-gulf-iran
#8
Fatemeh Farshadpour, Reza Taherkhani, Mohamad Reza Ravanbod, Seyed Sajjad Eghbali, Sakineh Taherkhani, Easa Mahdavi
BACKGROUND: Although Iran is reported to be an endemic country for hepatitis E virus (HEV), data on the prevalence of HEV infection among pregnant women are scarce and the epidemiology of HEV is unknown in most parts of the country. Therefore, this study was conducted to elucidate the prevalence, risk factors and genotypic pattern of HEV infection among pregnant women resident in the northern shores of Persian Gulf. This is the first report on the epidemiology of HEV infection among pregnant women in this territory...
2018: PloS One
https://www.readbyqxmd.com/read/29329314/influence-of-monsoonal-winds-on-chlorophyll-%C3%AE-distribution-in-the-beibu-gulf
#9
Chunyan Shen, Yunrong Yan, Hui Zhao, Jiayi Pan, Adam T Devlin
The influence of seasonal, monsoonal winds on the temporal and spatial variability of chlorophyll-a (chl-a) in the Beibu Gulf is studied based on long-term satellite data of sea surface winds, chl-a concentration and sea surface temperature (SST) and in-situ observations for the years from 2002 to 2014. The analysis results indicated that under northeasterly monsoonal winds, chl-a concentrations were substantially elevated in most area of the Beibu Gulf, with a high chl-a concentration (>2 mg m-3) patch extending southwestward from the coastal water of the northeastern Gulf, consistent with the winter wind pattern...
2018: PloS One
https://www.readbyqxmd.com/read/29329313/development-of-a-field-testing-protocol-for-identifying-deepwater-horizon-oil-spill-residues-trapped-near-gulf-of-mexico-beaches
#10
Yuling Han, T Prabhakar Clement
The Deepwater Horizon (DWH) accident, one of the largest oil spills in U.S. history, contaminated several beaches located along the Gulf of Mexico (GOM) shoreline. The residues from the spill still continue to be deposited on some of these beaches. Methods to track and monitor the fate of these residues require approaches that can differentiate the DWH residues from other types of petroleum residues. This is because, historically, the crude oil released from sources such as natural seeps and anthropogenic discharges have also deposited other types of petroleum residues on GOM beaches...
2018: PloS One
https://www.readbyqxmd.com/read/29324902/potential-impact-of-neonicotinoid-use-on-northern-bobwhite-colinus-virginianus-in-texas-a-historical-analysis
#11
Hannah M H Ertl, Miguel A Mora, Donald J Brightsmith, Jorge A Navarro-Alberto
The widespread use of neonicotinoid insecticides in recent years has led to increasing environmental concern, including impacts to avian populations. In Texas and across their range, Northern bobwhite (Colinus virginianus) habitat frequently overlaps cultivated cropland protected by neonicotinoids. To address the effects of neonicotinoid use on bobwhites in Texas, we conducted a historical analysis from 1978-2012 in Texas' ecological regions using quail count data collected from North American Breeding Bird Survey and Texas Parks and Wildlife Department, and neonicotinoid use data from the U...
2018: PloS One
https://www.readbyqxmd.com/read/29320168/linking-natural-oil-seeps-from-the-gulf-of-mexico-to-their-origin-by-use-of-fourier-transform-ion-cyclotron-resonance-mass-spectrometry
#12
Logan C Krajewski, Vladislav V Lobodin, Caroline Johansen, Tessa E Bartges, Ekaterina V Maksimova, Ian R MacDonald, Alan G Marshall
We report chemical characterization of natural oil seeps from the Gulf of Mexico by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and Gas Chromatography/Atmospheric Pressure Chemical Ionization Mass Spectrometry (GC/APCI-MS), to highlight how FT-ICR MS can also be employed as a means to determine petroleum connectivity, in addition to traditional GC/MS techniques. The source of petroleum is the Green Canyon (GC) 600 lease block in the Gulf of Mexico. Within GC600, two natural oil seepage zones, Mega Plume and Birthday Candles, continuously release hydrocarbons and develop persistent oil slicks at the sea surface above them...
January 10, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29306394/brevetoxin-pbtx-2-influences-the-redox-status-and-npq-of-karenia-brevis-by-way-of-thioredoxin-reductase
#13
Wei Chen, Ricardo Colon, J William Louda, Freddy Rodriguez Del Rey, Michaella Durham, Kathleen S Rein
The Florida red tide dinoflagellate, Karenia brevis, is the major harmful algal bloom dinoflagellate of the Gulf of Mexico and plays a destructive role in the region. Blooms of K. brevis can produce brevetoxins: ladder-shaped polyether (LSP) compounds, which can lead to adverse human health effects, such as reduced respiratory function through inhalation exposure, or neurotoxic shellfish poisoning through consumption of contaminated shellfish. The endogenous role of the brevetoxins remains uncertain. Recent work has shown that some forms of NADPH dependent thioredoxin reductase (NTR) are inhibited by brevetoxin-2 (PbTx-2)...
January 2018: Harmful Algae
https://www.readbyqxmd.com/read/29299656/mercury-levels-in-fish-for-human-consumption-from-the-southeast-gulf-of-california-tissue-distribution-and-health-risk-assessment
#14
A I Martínez-Salcido, J Ruelas-Inzunza, B Gil-Manrique, O Nateras-Ramírez, F Amezcua
We assessed human health risk due to mercury (Hg) concentrations in fish from three coastal lagoons (Urías, Huizache, and Teacapán) in the SE Gulf of California. We also determined Hg distribution in muscle and liver of analyzed ichthyofauna and compared the results among studied areas according to tissue, season, and lagoon system by using multivariate analyses. Levels of Hg in most of the analyzed fish followed the sequence liver > muscle. The highest Hg levels in muscle (2.80 µg g-1 dw) and liver (9...
January 3, 2018: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29299267/thresholds-of-sea-level-rise-rate-and-sea-level-rise-acceleration-rate-in-a-vulnerable-coastal-wetland
#15
Wei Wu, Patrick Biber, Matthew Bethel
Feedbacks among inundation, sediment trapping, and vegetation productivity help maintain coastal wetlands facing sea-level rise (SLR). However, when the SLR rate exceeds a threshold, coastal wetlands can collapse. Understanding the threshold helps address key challenges in ecology-nonlinear response of ecosystems to environmental change, promotes communication between ecologists and resource managers, and facilitates decision-making in climate change policies. We studied the threshold of SLR rate and developed a new threshold of SLR acceleration rate on sustainability of coastal wetlands as SLR is likely to accelerate due to enhanced anthropogenic forces...
December 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29298307/persistent-differences-between-coastal-and-offshore-kelp-forest-communities-in-a-warming-gulf-of-maine
#16
Jon D Witman, Robert W Lamb
Kelp forests provide important ecosystem services, yet coastal kelp communities are increasingly altered by anthropogenic impacts. Kelp forests in remote, offshore locations may provide an informative contrast due to reduced impacts from local stressors. We tested the hypothesis that shallow kelp assemblages (12-15 m depth) and associated fish and benthic communities in the coastal southwest Gulf of Maine (GOM) differed significantly from sites on Cashes Ledge, 145 km offshore by sampling five coastal and three offshore sites at 43...
2018: PloS One
https://www.readbyqxmd.com/read/29288405/reducing-the-risk-of-postpartum-depression-in-a-low-income-community-through-a-community-health-worker-intervention
#17
Christopher Mundorf, Arti Shankar, Tracy Moran, Sherry Heller, Anna Hassan, Emily Harville, Maureen Lichtveld
Objectives To clarify the effectiveness of perinatal social support interventions in reducing postpartum depression among minority, low-income women. Methods The Transdisciplinary Research Consortium for Gulf Resilience on Women's Health supported a community-based participatory research project to improve perinatal health among low-income, first-time pregnant women living in a vulnerable Gulf Coast region. Community health workers (CHWs) were partnered with recruited women, and used a mix of mobile technology and home visits to develop a supportive relationship during the perinatal period...
December 29, 2017: Maternal and Child Health Journal
https://www.readbyqxmd.com/read/29288257/predictors-of-blood-volatile-organic-compound-levels-in-gulf-coast-residents
#18
Emily J Werder, Kaitlyn B Gam, Lawrence S Engel, Richard K Kwok, Christine C Ekenga, Matthew D Curry, David M Chambers, Aaron Blair, Aubrey K Miller, Linda S Birnbaum, Dale P Sandler
To address concerns among Gulf Coast residents about ongoing exposures to volatile organic compounds, including benzene, toluene, ethylbenzene, o-xylene, and m-xylene/p-xylene (BTEX), we characterized current blood levels and identified predictors of BTEX among Gulf state residents. We collected questionnaire data on recent exposures and measured blood BTEX levels in a convenience sample of 718 Gulf residents. Because BTEX is rapidly cleared from the body, blood levels represent recent exposures in the past 24 h...
December 29, 2017: Journal of Exposure Science & Environmental Epidemiology
https://www.readbyqxmd.com/read/29287616/the-distribution-of-benthic-foraminifera-in-bel-torrente-submarine-cave-sardinia-italy-and-their-environmental-significance
#19
Elena Romano, Luisa Bergamin, Giancarlo Pierfranceschi, Claudio Provenzani, Andrea Marassich
The use of benthic foraminifera as ecological indicators in submarine caves of temperate seas have never been studied before and it represents a new approach, verified by this research. The Bel Torrente submarine cave (Gulf of Orosei, Sardinia, Italy) was surveyed by GUE (Global Underwater Explorers) scuba divers in order to georeferencing the cave before positioning the sampling stations, from the entrance to 430 m inside the cave. A total of 15 water samples were collected to investigate abiotic parameters (temperature, salinity, pH) while 15 sediment samples were collected to analyze grain size and benthic foraminifera...
December 20, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/29286258/a-survey-of-tick-species-in-a-recently-reintroduced-elk-cervus-elaphus-canadensis-population-in-southeastern-kentucky-with-potential-implications-for-interstate-translocation-of-zoonotic-disease-vectors
#20
B L Slabach, A McKinney, J Cunningham, J T Hast, J J Cox
In the late 20th century, elk ( Cervus elaphus canadensis) were reintroduced into southeastern Kentucky, US. This population has since been used as a stock population for additional elk reintroductions in other eastern states. Although reintroduction and translocation practices are effective, they can disseminate vectors and pathogens. Therefore, we surveyed tick species residing on elk hosts a decade after elk reintroduction in Kentucky by examining 263 captured individuals (female=86; male=177) from 2011 to 2013...
December 29, 2017: Journal of Wildlife Diseases
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