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https://www.readbyqxmd.com/read/29149758/oligotrophy-as-a-major-driver-of-mercury-bioaccumulation-in-medium-to-high-trophic-level-consumers-a-marine-ecosystem-comparative-study
#1
Tiphaine Chouvelon, Pierre Cresson, Marc Bouchoucha, Christophe Brach-Papa, Paco Bustamante, Sylvette Crochet, Françoise Marco-Miralles, Bastien Thomas, Joël Knoery
Mercury (Hg) is a global contaminant of environmental concern. Numerous factors influencing its bioaccumulation in marine organisms have already been described at both individual and species levels (e.g., size or age, habitat, trophic level). However, few studies have compared the trophic characteristics of ecosystems to explain underlying mechanisms of differences in Hg bioaccumulation and biomagnification among food webs and systems. The present study aimed at investigating the potential primary role of the trophic status of systems on Hg bioaccumulation and biomagnification in temperate marine food webs, as shown by their medium-to high-trophic level consumers...
November 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29145403/us-gulf-coast-states-the-rise-of-neglected-tropical-diseases-in-flyover-nation
#2
Peter J Hotez, Sheila Jackson Lee
No abstract text is available yet for this article.
November 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29141788/interleukin-1-receptor-antagonist-and-2-5-oligoadenylate-synthetase-like-molecules-as-novel-biomarkers-for-multiple-sclerosis-patients-in-bahrain
#3
Moudi Al-Nashmi, Safa Taha, Isa Alsharoqi, Moiz Bakhiet
BACKGROUND: Multiple sclerosis (MS) is a multi-factorial disease of the Central Nervous System (CNS) affecting young adults leading to significant disabilities over time. MS is now believed to be prevalent in Arabian Gulf area with high incidence due to environmental factors and unknown genetic variations. The objectives of this study was to detect up-regulated potential genes that might be involved in neuroinflammatory process in MS patients in Bahrain and to measure the protein levels of the expressed genes...
November 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29137891/human-leukocyte-antigen-hla-and-gulf-war-illness-gwi-hla-drb1-13-02-spares-subcortical-atrophy-in-gulf-war-veterans
#4
Lisa M James, Peka Christova, Brian E Engdahl, Scott M Lewis, Adam F Carpenter, Apostolos P Georgopoulos
BACKGROUND: Gulf War Illness (GWI) is a multisystem disorder that has affected a substantial number of veterans who served in the 1990-91 Gulf War. The brain is prominently affected, as manifested by the presence of neurological, cognitive and mood symptoms. We reported previously on the protective role of six Human Leukocyte Antigen (HLA) alleles in GWI (Georgopoulos et al., 2016) and their association with regional brain function (James et al., 2016). More recently, we reported on the presence of subcortical brain atrophy in GWI (Christova et al...
November 9, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29134383/spatial-distribution-and-metal-contamination-in-the-coastal-sediments-of-al-khafji-area-arabian-gulf-saudi-arabia
#5
Talal Alharbi, Hussain Alfaifi, Sattam A Almadani, Abdelbaset El-Sorogy
To document the spatial distribution and metal contamination in the coastal sediments of the Al-Khafji area in the northern part of the Saudi Arabian Gulf, 27 samples were collected for Al, V, Cr, Mn, Cu, Zn, Cd, Pb, Hg, Sr, As, Fe, Co, and Ni analysis using inductively coupled plasma-mass spectrometer (ICP-MS). The results revealed the following descending order of the metal concentrations: Sr > Fe > Al > As > Mn > Ni > V > Zn > Cr > Cu > Pb > Co > Hg > Cd. Average levels of enrichment factor of Sr, As, Hg, Cd, Ni, V, Cu, Co, and Pb were higher than 2 (218...
November 13, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29134261/drivers-and-challenges-for-implementing-iso-14001-environmental-management-systems-in-an-emerging-gulf-arab-country
#6
Marie-France Waxin, Sandra L Knuteson, Aaron Bartholomew
Worldwide, ISO 14001 certification for organizations has become the norm, but the Arab world accounts for an insignificant portion of all the certified organizations. There is a dearth of research on environmental management systems (EMS) in Arab and emerging countries and in public organizations. The objectives of this research are to: (1) examine the key drivers and challenges related to implementation of ISO 14001 certified EMS in the United Arab Emirates, an emerging Arab country and (2) compare and contrast these drivers and challenges between private and public organizations...
November 13, 2017: Environmental Management
https://www.readbyqxmd.com/read/29130131/distinctive-accumulation-patterns-of-heavy-metals-in-sardinella-aurita-clupeidae-and-mugil-cephalus-mugilidae-tissues
#7
Ali Annabi, Rahma El Mouadeb, Anthony Herrel
The present study assessed the impact of metal pollution on two widely consumed types of wild fish Sardinella aurita and Mugil cephalus captured from the Gulf of Gabes (Tunisia) which is currently experiencing acute environmental problems. A study of the Cd, Cu, Zn, and Pb levels present in the studied site and vital in fish tissues (gills, liver, gonad, and muscle) was undertaken. As expected, muscle, liver, and gonad tissues contained the highest concentrations of all metals except for Zn. The metal levels showed a significant variation of accumulation between species with overall effects of the tested tissues...
November 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29127633/natural-and-anthropogenic-particulate-bound-aliphatic-and-polycyclic-aromatic-hydrocarbons-in-surface-waters-of-the-gulf-of-gab%C3%A3-s-tunisia-southern-mediterranean-sea
#8
Rania Fourati, Marc Tedetti, Catherine Guigue, Madeleine Goutx, Hatem Zaghden, Sami Sayadi, Boubaker Elleuch
Particulate-bound aliphatic and polycyclic aromatic hydrocarbons (AHs and PAHs) were investigated in the surface waters of the Gulf of Gabès (Tunisia, southern Mediterranean Sea). Samples were collected off the Sfax and Gabès-Ghannouch coasts. Concentrations in total resolved n-alkanes ranged from 0.03 to 3.2 μg L(-1), and concentrations in total parents + alkylated PAHs ranged from bdl to 108.6 ng L(-1). The highest concentrations were recorded in the southern Sfax. AHs were mainly of biogenic origin with odd n-alkane predominance, although an anthropogenic contribution was also detected...
November 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29127316/exercise-induced-changes-in-cerebrospinal-fluid-mirnas-in-gulf-war-illness-chronic-fatigue-syndrome-and-sedentary-control-subjects
#9
James N Baraniuk, Narayan Shivapurkar
Gulf War Illness (GWI) and Chronic Fatigue Syndrome (CFS) have similar profiles of pain, fatigue, cognitive dysfunction and exertional exhaustion. Post-exertional malaise suggests exercise alters central nervous system functions. Lumbar punctures were performed in GWI, CFS and control subjects after (i) overnight rest (nonexercise) or (ii) submaximal bicycle exercise. Exercise induced postural tachycardia in one third of GWI subjects (Stress Test Activated Reversible Tachycardia, START). The remainder were Stress Test Originated Phantom Perception (STOPP) subjects...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29126934/neuropsychological-functioning-in-military-pesticide-applicators-from-the-gulf-war-effects-on-information-processing-speed-attention-and-visual-memory
#10
Kimberly Sullivan, Maxine Krengel, William Bradford, Callie Stone, Terri Ann Thompson, Timothy Heeren, Roberta F White
1991 Gulf War (GW) veterans continue to experience debilitating cognitive and mood problems more than two decades following their return from deployment. Suspected causes for these cognitive complaints include additive and/or synergistic effects of the varying combinations of exposures to chemicals in theater, including pesticides and pyridostigmine bromide (PB) pills. This study was undertaken to address one of the key recommendations of the US Department of Defense Environmental Exposure Report on Pesticides, which was to conduct an epidemiological study to further evaluate the role of neurotoxicant exposures in the expression of central nervous system symptoms reported by GW veterans...
November 7, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/29120211/mental-health-treatment-related-stigma-and-professional-help-seeking-among-student-veterans
#11
Joseph M Currier, Ryon C McDermott, Wesley H McCormick
Record numbers of military veterans are enrolling at colleges/universities across the United States. Although a substantive subset might suffer from mental health problems, the majority of these students might not be amenable to utilizing services. The purpose of this study was to examine the role of treatment-related stigma in intentions to seek professional help among undergraduate student veterans at a university on the U.S. Gulf Coast. Focusing on 251 veterans and a gender-matched comparison group of 251 nonveterans, student veterans endorsed higher probabilities of seeking care from physicians (d = ...
November 2017: Psychological Services
https://www.readbyqxmd.com/read/29120082/substantial-differences-in-bias-between-single-digest-and-double-digest-rad-seq-libraries-a-case-study
#12
Sarah P Flanagan, Adam G Jones
The tradeoffs of using single-digest versus double-digest restriction site associated DNA sequencing (RAD-seq) protocols have been widely discussed. However, no direct empirical comparisons of the two methods have been conducted. Here, we sampled a single population of Gulf pipefish (Syngnathus scovelli) and genotyped 444 individuals using RAD-seq. Sixty individuals were subjected to single-digest RAD-seq (sdRAD-seq), and the remaining 384 individuals were genotyped using a double-digest RAD-seq (ddRAD-seq) protocol...
November 9, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/29118631/a-new-genus-and-species-of-bristle-worm-from-beibu-gulf-south-china-sea-annelida-polychaeta-amphinomidae
#13
Yue Sun, Xinzheng Li
Alleurythoe, a new genus with type species Alleurythoe tenuichaetasp. n., is described and illustrated based on material from Beibu Gulf, northwestern South China Sea. The new genus is distinguished from all genera within Amphinomidae by a combination of characters: caruncle trilobed, conspicuous, attached to and confluent with the posterior prostomial lobe, which is free from the body wall and has 6-7 folds on each of the lateral lobes; both noto- and neuropodial aciculae are spinose, extending beyond the chaetal lobe...
2017: ZooKeys
https://www.readbyqxmd.com/read/29118617/a-sea-anemone-of-many-names-a-review-of-the-taxonomy-and-distribution-of-the-invasive-actiniarian-diadumene-lineata-diadumenidae-with-records-of-its-reappearance-on-the-texas-coast
#14
Zachary B Hancock, Janelle A Goeke, Mary K Wicksten
Diadumene lineata (Actiniaria: Diadumenidae) is a prolific invader of coastal environments around the world. First described from Asia, this sea anemone has only been reported once from the western Gulf of Mexico at Port Aransas, Texas. No subsequent sampling has located this species at this locality. The first record of the reappearance of D. lineata on the Texas coast from three locations in the Galveston Bay area is provided, and its geographic distribution and taxonomic history reviewed.
2017: ZooKeys
https://www.readbyqxmd.com/read/29118393/birth-of-an-oceanic-spreading-center-at-a-magma-poor-rift-system
#15
Morgane Gillard, Daniel Sauter, Julie Tugend, Simon Tomasi, Marie-Eva Epin, Gianreto Manatschal
Oceanic crust is continuously created at mid-oceanic ridges and seafloor spreading represents one of the main processes of plate tectonics. However, if oceanic crust architecture, composition and formation at present-day oceanic ridges are largely described, the processes governing the birth of a spreading center remain enigmatic. Understanding the transition between inherited continental and new oceanic domains is a prerequisite to constrain one of the last major unsolved problems of plate tectonics, namely the formation of a stable divergent plate boundary...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29118318/rapid-termination-of-the-african-humid-period-triggered-by-northern-high-latitude-cooling
#16
James A Collins, Matthias Prange, Thibaut Caley, Luis Gimeno, Britta Beckmann, Stefan Mulitza, Charlotte Skonieczny, Didier Roche, Enno Schefuß
The rapidity and synchrony of the African Humid Period (AHP) termination at around 5.5 ka are debated, and it is unclear what caused a rapid hydroclimate response. Here we analysed the hydrogen isotopic composition of sedimentary leaf-waxes (δDwax) from the Gulf of Guinea, a proxy for regional precipitation in Cameroon and the central Sahel-Sahara. Our record indicates high precipitation during the AHP followed by a rapid decrease at 5.8-4.8 ka. The similarity with a δDwax record from northern East Africa suggests a large-scale atmospheric mechanism...
November 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/29117450/nutrition-strategies-before-and-during-ultra-endurance-event-a-significant-gap-between-science-and-practice
#17
Soyzana K Papadopoulou, Eleni E Xyla, Spyridon Methenitis, Konstantinos G Feidantsis, Yiannis Kotsis, Ioannis G Pagkalos, Maria N Hassapidou
The purpose of the present study was to investigate and assess the nutritional practices of open-water swimmers, during the preparation period and the competition, as well as their implications on performance and anthropometric parameters according to their age. Twenty-four (n=24) men open-water swimmers, twelve young (26.3±4.9yrs) and twelve older athletes (45.8±9.7yrs), participated in the present study. Nutritional behavior - intake-energy consumption, and anthropometric characteristics were evaluated prior to the Toroneos Gulf crossing (26Km)...
November 8, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29114244/phage-and-nucleocytoplasmic-large-viral-sequences-dominate-coral-viromes-from-the-arabian-gulf
#18
Huda Mahmoud, Liny Jose
Corals that naturally thrive under extreme conditions are gaining increasing attention due to their importance as living models to understand the impact of global warming on world corals. Here, we present the first metagenomic study of viral communities in corals thriving in a thermally variable water body in which the temperature fluctuates between 11 and 39°C in different seasons. The viral assemblages of two of the most abundant massive (Porites harrisoni) and branching (Acropora downingi) corals in offshore and inshore reef systems in the northern Arabian Gulf were investigated...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29112918/toxicity-of-weathered-deepwater-horizon-oil-to-bay-anchovy-anchoa-mitchilli-embryos
#19
Kathryn A O'Shaughnessy, Heather Forth, Ryan Takeshita, Edward J Chesney
The BP-contracted Deepwater Horizon Macondo well blowout occurred on 20 April 2010 and lasted nearly three months. The well released millions of barrels of crude oil into the northern Gulf of Mexico, causing extensive impacts on pelagic, benthic, and estuarine fish species. The bay anchovy (Anchoa mitchilli) is an important zooplanktivore in the Gulf, serving as an ecological link between lower trophic levels and pelagic predatory fish species. Bay anchovy spawn from May through November in shallow inshore and estuarine waters throughout the Gulf...
November 4, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29109712/anaerobic-oxidation-of-ethane-propane-and-butane-by-marine-microbes-a-mini-review
#20
REVIEW
Rajesh Singh, Michael S Guzman, Arpita Bose
The deep ocean and its sediments are a continuous source of non-methane short-chain alkanes (SCAs) including ethane, propane, and butane. Their high global warming potential, and contribution to local carbon and sulfur budgets has drawn significant scientific attention. Importantly, microbes can use gaseous alkanes and oxidize them to CO2, thus acting as effective biofilters. A relative decrease of these gases with a concomitant (13)C enrichment of propane and n-butane in interstitial waters vs. the source suggests microbial anaerobic oxidation...
2017: Frontiers in Microbiology
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