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https://www.readbyqxmd.com/read/28645159/genomic-characterization-of-two-novel-sar11-isolates-from-the-red-sea-including-the-first-strain-of-the-sar11-ib-clade
#1
Francy Jimenez-Infante, David Kamanda Ngugi, Manikandan Vinu, Jochen Blom, Intikhab Alam, Vladimir B Bajic, Ulrich Stingl
The SAR11 clade (Pelagibacterales) is a diverse group that forms a monophyletic clade within the Alphaproteobacteria, and constitutes up to one third of all prokaryotic cells in the photic zone of most oceans. Pelagibacterales are very abundant in the warm and highly saline surface waters of the Red Sea, raising the question of adaptive traits of SAR11 populations in this water body and warmer oceans through the world. In this study, two pure cultures were successfully obtained from surface waters on the Red Sea, one isolate of subgroup Ia and one of the previously uncultured SAR11 Ib lineage...
June 22, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28645090/the-impact-of-tidal-and-mesoscale-eddy-advection-on-the-long-term-dispersion-of-99-tc-from-sellafield
#2
Magne Simonsen, Øyvind Saetra, Pål Erik Isachsen, Ole Christian Lind, Hilde Kristin Skjerdal, Brit Salbu, Hilde Elise Heldal, Justin P Gwynn
In the present work, numerical models are used to study the fate of the (99)Tc discharges from Sellafield with a specific focus on the role of mesoscale eddy and tidal advection on the transport and dispersion of this radionuclide. Transport estimates are made with an ocean model that resolves a large part of the ocean mesoscale eddy field and also includes tides. Equivalent estimates are also computed with another model in which these processes are either absent or parametrized. Comparison with field observations shows that the coarse-resolution model can reproduce the general features of the observed time-space (99)Tc distribution if the diffusivity in its eddy parametrization scheme is suitably chosen...
June 20, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28645049/gaseous-elemental-mercury-in-the-marine-boundary-layer-and-air-sea-flux-in-the-southern-ocean-in-austral-summer
#3
Jiancheng Wang, Zhouqing Xie, Feiyue Wang, Hui Kang
Gaseous elemental mercury (GEM) in the marine boundary layer (MBL), and dissolved gaseous mercury (DGM) in surface seawater of the Southern Ocean were measured in the austral summer from December 13, 2014 to February 1, 2015. GEM concentrations in the MBL ranged from 0.4 to 1.9ngm(-3) (mean±standard deviation: 0.9±0.2ngm(-3)), whereas DGM concentrations in surface seawater ranged from 7.0 to 75.9pgL(-1) (mean±standard deviation: 23.7±13.2pgL(-1)). The occasionally observed low GEM in the MBL suggested either the occurrence of atmospheric mercury depletion in summer, or the transport of GEM-depleted air from the Antarctic Plateau...
June 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28644983/future-heat-waves-due-to-climate-change-threaten-the-survival-of-p-%C3%A2-oceanica-seedlings
#4
Laura Guerrero-Meseguer, Arnaldo Marín, Carlos Sanz-Lázaro
Extreme weather events are major drivers of ecological change, and their occurrence is likely to increase due to climate change. The transient increases in atmospheric temperatures are leading to a greater occurrence of heat waves, extreme events that can produce a substantial warming of water, especially in enclosed basins such as the Mediterranean Sea. Here, we tested the effects of current and predicted heat waves on the early stages of development of the seagrass Posidonia oceanica. Temperatures above 27 °C limited the growth of the plant by inhibiting its photosynthetic system...
June 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28644894/northward-dispersal-of-sea-kraits-laticauda-semifasciata-beyond-their-typical-range
#5
Jaejin Park, Il-Hun Kim, Jonathan J Fong, Kyo-Soung Koo, Woo-Jin Choi, Tein-Shun Tsai, Daesik Park
Marine reptiles are declining globally, and recent climate change may be a contributing factor. The study of sea snakes collected beyond their typical distribution range provides valuable insight on how climate change affects marine reptile populations. Recently, we collected 12 Laticauda semifasciata (11 females, 1 male) from the waters around southern South Korea-an area located outside its typical distribution range (Japan, China including Taiwan, Philippines and Indonesia). We investigated the genetic origin of Korean specimens by analyzing mitochondrial cytochrome b gene (Cytb) sequences...
2017: PloS One
https://www.readbyqxmd.com/read/28644882/a-spatially-explicit-risk-assessment-approach-cetaceans-and-marine-traffic-in-the-pelagos-sanctuary-mediterranean-sea
#6
Maria Grazia Pennino, Antonella Arcangeli, Vinícius Prado Fonseca, Ilaria Campana, Graham J Pierce, Andrea Rotta, Jose Maria Bellido
Spatially explicit risk assessment is an essential component of Marine Spatial Planning (MSP), which provides a comprehensive framework for managing multiple uses of the marine environment, minimizing environmental impacts and conflicts among users. In this study, we assessed the risk of the exposure to high intensity vessel traffic areas for the three most abundant cetacean species (Stenella coeruleoalba, Tursiops truncatus and Balaenoptera physalus) in the southern area of the Pelagos Sanctuary, which is the only pelagic Marine Protected Area (MPA) for marine mammals in the Mediterranean Sea...
2017: PloS One
https://www.readbyqxmd.com/read/28644717/responses-of-a-vulnerable-hispanic-population-in-new-jersey-to-hurricane-sandy-access-to-care-medical-needs-concerns-and-ecological-ratings
#7
Joanna Burger, Michael Gochfeld, Taryn Pittfield, Christian Jeitner
Recent increases in hurricanes led to a need to evaluate access to medical care, medical needs, and personal and community impact on vulnerable populations, particularly elderly, low income, and minority communities. This investigation examined (1) access to care, (2) interruptions in medical services, (3) personal impact from Hurricane Sandy, and (4) agreement with ecological statements related to storms, flooding, and damages in Hispanic/Latino patients receiving health care at Federally Qualified Health Centers in New Jersey...
June 23, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28643801/january-2016-extensive-summer-melt-in-west-antarctica-favoured-by-strong-el-ni%C3%A3-o
#8
Julien P Nicolas, Andrew M Vogelmann, Ryan C Scott, Aaron B Wilson, Maria P Cadeddu, David H Bromwich, Johannes Verlinde, Dan Lubin, Lynn M Russell, Colin Jenkinson, Heath H Powers, Maciej Ryczek, Gregory Stone, Jonathan D Wille
Over the past two decades the primary driver of mass loss from the West Antarctic Ice Sheet (WAIS) has been warm ocean water underneath coastal ice shelves, not a warmer atmosphere. Yet, surface melt occurs sporadically over low-lying areas of the WAIS and is not fully understood. Here we report on an episode of extensive and prolonged surface melting observed in the Ross Sea sector of the WAIS in January 2016. A comprehensive cloud and radiation experiment at the WAIS ice divide, downwind of the melt region, provided detailed insight into the physical processes at play during the event...
June 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28643789/tidal-dynamics-and-mangrove-carbon-sequestration-during-the-oligo-miocene-in-the-south-china-sea
#9
Daniel S Collins, Alexandros Avdis, Peter A Allison, Howard D Johnson, Jon Hill, Matthew D Piggott, Meor H Amir Hassan, Abdul Razak Damit
Modern mangroves are among the most carbon-rich biomes on Earth, but their long-term (≥10(6) years) impact on the global carbon cycle is unknown. The extent, productivity and preservation of mangroves are controlled by the interplay of tectonics, global sea level and sedimentation, including tide, wave and fluvial processes. The impact of these processes on mangrove-bearing successions in the Oligo-Miocene of the South China Sea (SCS) is evaluated herein. Palaeogeographic reconstructions, palaeotidal modelling and facies analysis suggest that elevated tidal range and bed shear stress optimized mangrove development along tide-influenced tropical coastlines...
June 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28643454/polar-zoobenthos-blue-carbon-storage-increases-with-sea-ice-losses-because-across-shelf-growth-gains-from-longer-algal-blooms-outweigh-ice-scour-mortality-in-the-shallows
#10
David K A Barnes
One of the major climate-forced global changes has been white to blue to green; losses of sea ice extent in time and space around Arctic and West Antarctic seas has increased open water and the duration (though not magnitude) of phytoplankton blooms. Blueing of the poles has increases potential for heat absorption for positive feedback but conversely the longer phytoplankton blooms have increased carbon export to storage and sequestration by shelf benthos. However, ice shelf collapses and glacier retreat can calve more icebergs, and the increased open water allows icebergs more opportunities to scour the seabed, reducing zoobenthic blue carbon capture and storage...
June 23, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28643227/preparation-and-characterization-of-alginate-microparticles-containing-a-model-protein-for-oral-administration-in-gnotobiotic-european-sea-bass-dicentrarchus-labrax-larvae
#11
Eamy Nursaliza Yaacob, Jens Goethals, Aline Bajek, Kristof Dierckens, Peter Bossier, Bruno G De Geest, Daisy Vanrompay
Aquaculture is the fastest growing animal production sector. However, the production of marine fish is still hampered by the high mortality rate in the first few weeks after hatching. Mortality in larvae is often caused by microbial infections. Today, the incorporation of immunostimulants into microparticles provides us new tools to enhance disease resistance in marine larviculture. In this study, we prepared alginate microparticles loaded with the model antigen fluorescein isothiocyanate conjugated-bovine serum albumin...
June 22, 2017: Marine Biotechnology
https://www.readbyqxmd.com/read/28642738/distinct-bacterial-communities-associated-with-massive-and-branching-scleractinian-corals-and-potential-linkages-to-coral-susceptibility-to-thermal-or-cold-stress
#12
Jiayuan Liang, Kefu Yu, Yinghui Wang, Xueyong Huang, Wen Huang, Zhenjun Qin, Ziliang Pan, Qiucui Yao, Wenhuan Wang, Zhengchao Wu
It is well known that different coral species have different tolerances to thermal or cold stress, which is presumed to be related to the density of Symbiodinium. However, the intrinsic factors between stress-tolerant characteristics and coral-associated bacteria are rarely studied. In this study, 16 massive coral and 9 branching coral colonies from 6 families, 10 genera, and 18 species were collected at the same time and location (Xinyi Reef) in the South China Sea to investigate the bacterial communities...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28642495/rapid-response-to-climate-change-in-a-marginal-sea
#13
K Schroeder, J Chiggiato, S A Josey, M Borghini, S Aracri, S Sparnocchia
The Mediterranean Sea is a mid-latitude marginal sea, particularly responsive to climate change as reported by recent studies. The Sicily Channel is a choke point separating the sea in two main basins, the Eastern Mediterranean Sea and the Western Mediterranean Sea. Here, we report and analyse a long-term record (1993-2016) of the thermohaline properties of the Intermediate Water that crosses the Sicily Channel, showing increasing temperature and salinity trends much stronger than those observed at intermediate depths in the global ocean...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642099/developmental-cardiovascular-physiology-of-the-olive-ridley-sea-turtle-lepidochelys-olivacea
#14
Dane Alan Crossley, Janna Lee Crossley, Camilla Smith, Martha Harfush, Hermilo Sánchez-Sánchez, Mónica Vanessa Garduño-Paz, José Fernando Méndez-Sánchez
Our understanding of reptilian cardiovascular development and regulation has increased substantially for two species the American alligator (Alligator mississippiensis) and the common snapping turtle (Chelydra serpentina) during the past two decades. However, what we know about cardiovascular maturation in many other species remains poorly understood or unknown. Embryonic sea turtles have been studied to understand the maturation of metabolic function, but these studies have not addressed the cardiovascular system...
June 19, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28641885/remote-sensing-and-water-quality-indicators-in-the-korean-west-coast-spatio-temporal-structures-of-modis-derived-chlorophyll-a-and-total-suspended-solids
#15
Hae-Cheol Kim, Seunghyun Son, Yong Hoon Kim, Jong Seong Khim, Jungho Nam, Won Keun Chang, Jung-Ho Lee, Chang-Hee Lee, Jongseong Ryu
The Yellow Sea is a shallow marginal sea with a large tidal range. In this study, ten areas located along the western coast of the Korean Peninsula are investigated with respect to remotely sensed water quality indicators derived from NASA MODIS aboard of the satellite Aqua. We found that there was a strong seasonal trend with spatial heterogeneity. In specific, a strong six-month phase-lag was found between chlorophyll-a and total suspended solid owing to their inversed seasonality, which could be explained by different dynamics and environmental settings...
June 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28641883/petroleum-oil-removal-by-immobilized-bacterial-cells-on-polyurethane-foam-under-different-temperature-conditions
#16
Mauricio J Alessandrello, María S Juárez Tomás, Enzo E Raimondo, Diana L Vullo, Marcela A Ferrero
In this work, a mixed biofilm composed by Pseudomonas monteilii P26 and Gordonia sp. H19 was formed using polyurethane foam (PUF) as immobilization support, for crude oil removal from artificial sea water. Fresh immobilized cells and immobilized cells that were stored at 4°C for two months before use were assessed. The oil removal assays were carried out at microcosm scale at 4, 15 and 30°C. A viability loss of P. monteilii P26 was observed after the storage. The highest removal value (75%) was obtained at 30°C after 7days using fresh immobilized cells on PUF...
June 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28641672/determination-of-five-alternative-antifouling-agents-found-along-the-korean-coasts
#17
Seongeon Lee, Dongsup Lee, Yong-Woo Lee
  Since the ban of tri-butyl tin, other various alternative antifouling agents have been used. In this study, the contamination levels from these antifouling agents were examined in the main harbors in Korea. The sampled harbors were classified into four types and the levels of contamination from the antifouling agents were analyzed. The highest degree of contamination was found in the big harbors, followed by the fishing harbors, harbors near agricultural areas, and military and coast guard harbors. In addition, an increase in the number of ships that entered the ports significantly influenced the contamination by the antifouling agents...
July 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28641456/a-new-antiviral-pregnane-from-a-gorgonian-derived-cladosporium-sp-fungus
#18
Mei-Lin Yu, Fei-Fei Guan, Fei Cao, Yan-Lai Jia, Chang-Yun Wang
A new pregnane, 3α-hydroxy-7-ene-6,20-dione (1), and five known steroids (2-6), along with one known steroidal glycoside (7) were obtained from the fungus Cladosporium sp. WZ-2008-0042 cultured from a gorgonian Dichotella gemmacea collected from the South China Sea. The structure and absolute configuration of the new compound (1) were elucidated by comprehensive spectroscopic data and X-ray diffraction data. The compound has a rare configuration of 3α-OH that is different from most of pregnanes. All of the isolated compounds were evaluated for their antiviral activities against respiratory syncytial virus (RSV)...
June 23, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28641322/scuba-diving-and-otology-a-systematic-review-with-recommendations-on-diagnosis-treatment-and-post-operative-care
#19
REVIEW
Devon M Livingstone, Kristine A Smith, Beth Lange
Scuba diving is a popular recreational and professional activity with inherent risks. Complications related to barotrauma and decompression illness can pose significant morbidity to a diver's hearing and balance systems. The majority of dive-related injuries affect the head and neck, particularly the outer, middle and inner ear. Given the high incidence of otologic complications from diving, an evidence-based approach to the diagnosis and treatment of otic pathology is a necessity. We performed a systematic and comprehensive literature review including the pathophysiology, diagnosis, and treatment of otologic pathology related to diving...
June 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/28640969/control-of-breathing-and-ventilatory-acclimatization-to-hypoxia-in-deer-mice-native-to-high-altitudes
#20
Catherine M Ivy, Graham R Scott
AIM: We compared the control of breathing and heart rate by hypoxia between high- and low-altitude populations of Peromyscus mice, to help elucidate the physiological specializations that help high-altitude natives cope with O2 limitation. METHODS: Deer mice (P. maniculatus) native to high altitude and congeneric mice native to low altitude (P. leucopus) were bred in captivity at sea level. The F1 progeny of each population were raised to adulthood and then acclimated to normoxia or hypobaric hypoxia (12 kPa, simulating hypoxia at ~4300 m) for 5 months...
June 22, 2017: Acta Physiologica
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