keyword
MENU ▼
Read by QxMD icon Read
search

Ocean

keyword
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/28645158/the-potential-for-co-evolution-of-co2-concentrating-mechanisms-and-rubisco-in-diatoms
#2
Jodi N Young, Brian M Hopkinson
Diatoms are a diverse group of unicellular algae that contribute significantly to global photosynthetic carbon fixation and export in the modern ocean, and are an important source of microfossils for paleoclimate reconstructions. Because of their importance in the environment, diatoms have been a focus of study on the physiology and ecophysiology of carbon fixation, in particular their CO2-concentrating mechanisms (CCMs) and Rubisco characteristics. While carbon fixation in diatoms is not as well understood as in certain model aquatic photoautotrophs, a greater number of species have been examined in diatoms...
June 22, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28645090/the-impact-of-tidal-and-mesoscale-eddy-advection-on-the-long-term-dispersion-of-99-tc-from-sellafield
#3
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
#4
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/28645048/phytolith-carbon-sequestration-in-global-terrestrial-biomes
#5
Zhaoliang Song, Hongyan Liu, Caroline A E Strömberg, Xiaomin Yang, Xiaodong Zhang
Terrestrial biogeochemical carbon (C) sequestration is coupled with the biogeochemical silicon (Si) cycle through mechanisms such as phytolith C sequestration, but the size and distribution of the phytolith C sink remain unclear. Here, we estimate phytolith C sequestration in global terrestrial biomes. We used biome data including productivity, phytolith and silica contents, and the phytolith stability factor to preliminarily determine the size and distribution of the phytolith C sink in global terrestrial biomes...
June 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28644894/northward-dispersal-of-sea-kraits-laticauda-semifasciata-beyond-their-typical-range
#6
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/28644584/autumn-weather-and-winter-increase-in-cerebrovascular-disease-mortality
#7
R McDonagh, J Harbison
Mortality from cerebrovascular disease increases in winter but the cause is unclear. Ireland's oceanic climate means that it infrequently experiences extremes of weather. We examined how weather patterns relate to stroke mortality in Ireland. Seasonal data for Sunshine (% of average), Rainfall (% of average) and Temperature (degrees Celsius above average) were collected for autumn (September-November) and winter (December-February) using official Irish Meteorological Office data. National cerebrovascular mortality data was obtained from Quarterly Vital Statistics...
December 12, 2016: Irish Medical Journal
https://www.readbyqxmd.com/read/28644377/an-operational-in-situ-soil-moisture-soil-temperature-monitoring-network-for-west-wales-uk-the-wsmn-network
#8
George P Petropoulos, Jon P McCalmont
This paper describes a soil moisture dataset that has been collecting ground measurements of soil moisture, soil temperature and related parameters for west Wales, United Kingdom. Already acquired in situ data have been archived to the autonomous Wales Soil Moisture Network (WSMN) since its foundation in July 2011. The sites from which measurements are being collected represent a range of conditions typical of the Welsh environment, with climate ranging from oceanic to temperate and a range of the most typical land use/cover types found in Wales...
June 23, 2017: Sensors
https://www.readbyqxmd.com/read/28644081/effects-of-added-lipids-on-digestibility-and-nitrogen-balance-in-oiled-common-murres-uria-aalge-and-western-grebes-aechmophorus-occidentalis-fed-four-formulations-of-a-critical-care-diet
#9
Rebecca S Duerr, Kirk C Klasing
Nutritional support is a primary therapy administered to oiled animals during responses to oil spills, but data informing nutritional decision-making during events are limited. In this study, 44 common murres ( Uria aalge ) and 6 Western grebes ( Aechmophorus occidentalis ), naturally oiled by oceanic seeps off the coast of Ventura and Santa Barbara Counties, CA, USA, were assigned to 1 of 4 groups fed diets with varying levels (6.8% [no added oil], 11%, and 20%) and types (salmon, corn) of oil added to a partially purified basal diet...
June 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28643801/january-2016-extensive-summer-melt-in-west-antarctica-favoured-by-strong-el-ni%C3%A3-o
#10
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/28643787/single-virus-genomics-reveals-hidden-cosmopolitan-and-abundant-viruses
#11
Francisco Martinez-Hernandez, Oscar Fornas, Monica Lluesma Gomez, Benjamin Bolduc, Maria Jose de la Cruz Peña, Joaquín Martínez Martínez, Josefa Anton, Josep M Gasol, Riccardo Rosselli, Francisco Rodriguez-Valera, Matthew B Sullivan, Silvia G Acinas, Manuel Martinez-Garcia
Microbes drive ecosystems under constraints imposed by viruses. However, a lack of virus genome information hinders our ability to answer fundamental, biological questions concerning microbial communities. Here we apply single-virus genomics (SVGs) to assess whether portions of marine viral communities are missed by current techniques. The majority of the here-identified 44 viral single-amplified genomes (vSAGs) are more abundant in global ocean virome data sets than published metagenome-assembled viral genomes or isolates...
June 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28642608/ocean-acidification-as-a-driver-of-community-simplification-via-the-collapse-of-higher-order-and-rise-of-lower-order-consumers
#12
S Vizzini, B Martínez-Crego, C Andolina, A Massa-Gallucci, S D Connell, M C Gambi
Increasing oceanic uptake of CO2 is predicted to drive ecological change as both a resource (i.e. CO2 enrichment on primary producers) and stressor (i.e. lower pH on consumers). We use the natural ecological complexity of a CO2 vent (i.e. a seagrass system) to assess the potential validity of conceptual models developed from laboratory and mesocosm research. Our observations suggest that the stressor-effect of CO2 enrichment combined with its resource-effect drives simplified food web structure of lower trophic diversity and shorter length...
June 22, 2017: Scientific Reports
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/28641894/carbon-assimilation-and-losses-during-an-ocean-acidification-mesocosm-experiment-with-special-reference-to-algal-blooms
#14
Nana Liu, Shanying Tong, Xiangqi Yi, Yan Li, Zhenzhen Li, Hangbin Miao, Tifeng Wang, Futian Li, Dong Yan, Ruiping Huang, Yaping Wu, David A Hutchins, John Beardall, Minhan Dai, Kunshan Gao
A mesocosm experiment was conducted in Wuyuan Bay (Xiamen), China, to investigate the effects of elevated pCO2 on bloom formation by phytoplankton species previously studied in laboratory-based ocean acidification experiments, to determine if the indoor-grown species performed similarly in mesocosms under more realistic environmental conditions. We measured biomass, primary productivity and particulate organic carbon (POC) as well as particulate organic nitrogen (PON). Phaeodactylum tricornutum outcompeted Thalassiosira weissflogii and Emiliania huxleyi, comprising more than 99% of the final biomass...
May 27, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28640918/identifying-key-demographic-parameters-of-a-small-island-associated-population-of-indo-pacific-bottlenose-dolphins-reunion-indian-ocean
#15
Violaine Dulau, Vanessa Estrade, Jacques Fayan
Photo-identification surveys of Indo-Pacific bottlenose dolphins were conducted from 2009 to 2014 off Reunion Island (55°E33'/21°S07'), in the Indian Ocean. Robust Design models were applied to produce the most reliable estimate of population abundance and survival rate, while accounting for temporary emigration from the survey area (west coast). The sampling scheme consisted of a five-month (June-October) sampling period in each year of the study. The overall population size at Reunion was estimated to be 72 individuals (SE = 6...
2017: PloS One
https://www.readbyqxmd.com/read/28640345/abundance-of-the-reef-building-petaloconchus-varians-gastropoda-vermetidae-on-intertidal-rocky-shores-at-ilha-grande-bay-southeastern-brazil
#16
André Breves, Maria Teresa M DE Széchy, Helena P Lavrado, Andrea O R Junqueira
The reef-building vermetid Petaloconchus varians occurs in the western Atlantic Ocean, from the Caribbean Sea to the southern coast of Brazil. The present study evaluated the abundance of P. varians on intertidal rocky shores in Ilha Grande Bay (Rio de Janeiro State), and characterized their reefs, describing the species density, besides the weight and the belt width of the reefs. Petaloconchus varians reefs were recorded at 25 sites, with rocky shores exposed to different wave action (very sheltered, sheltered, semi-exposed and exposed) and slopes (10° to 46°)...
April 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28640236/a-decision-mixture-model-based-method-for-inshore-ship-detection-using-high-resolution-remote-sensing-images
#17
Fukun Bi, Jing Chen, Yin Zhuang, Mingming Bian, Qingjun Zhang
With the rapid development of optical remote sensing satellites, ship detection and identification based on large-scale remote sensing images has become a significant maritime research topic. Compared with traditional ocean-going vessel detection, inshore ship detection has received increasing attention in harbor dynamic surveillance and maritime management. However, because the harbor environment is complex, gray information and texture features between docked ships and their connected dock regions are indistinguishable, most of the popular detection methods are limited by their calculation efficiency and detection accuracy...
June 22, 2017: Sensors
https://www.readbyqxmd.com/read/28639958/pediatric-jellyfish-envenomation-in-the-mediterranean-sea
#18
Miguel Glatstein, Dikla Adir, Bella Galil, Dennis Scolnik, Ayelet Rimon, Dikla Pivko-Levy, Christopher Hoyte
BACKGROUND: Several species of jellyfish native to the western Indian Ocean have entered the Mediterranean Sea through the Suez Canal. Since the late 1980s, each summer Rhopilema nomadica forms swarms as long as 100 km in the southeastern Levant and since the millennium aggregations of additional nonnative jellyfish have been sighted. The aim of this study was to evaluate children seen in the emergency department after jellyfish envenomations and to establish patterns of toxicity associated with this organism...
June 20, 2017: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
https://www.readbyqxmd.com/read/28637387/immunopathology-of-chikungunya-virus-infection-lessons-learned-from-patients-and-animal-models
#19
Lisa F P Ng
Chikungunya virus (CHIKV) is an arthropod-borne alphavirus that causes acute and chronic arthritis. The virus reemerged in the Indian Ocean islands in 2005-2006 and is responsible for outbreaks in the Caribbean islands and the Americas since late 2013. Despite the wealth of research over the past 10 years, there are no commercially available antiviral drugs or vaccines. Treatment usually involves analgesics, anti-inflammatory drugs, and supportive care. Most studies have been focused on understanding the pathogenesis of CHIKV infection through clinical observation and with animal models...
June 21, 2017: Annual Review of Virology
https://www.readbyqxmd.com/read/28637254/phylogeography-of-lionfishes-pterois-indicate-taxonomic-over-splitting-and-hybrid-origin-of-the-invasive-pterois-volitans
#20
Christie L Wilcox, Hiroyuki Motomura, Mizuki Matsunuma, Brian W Bowen
The lionfish is an iconic marine fish, and recently renowned for a disastrous introduction into the West Atlantic. Genetic surveys of the putative invaders (Pterois volitans and P. miles) in their natural Indo-Pacific range can illuminate both topics. Previous research indicated that P. volitans and P. miles are sister species that hybridize in the invasive range, but hybridization in the native range is unknown. Here we apply mtDNA COI and two nuclear introns (S7 RP1 and Gpd2) from 229 lionfish including the two invaders and two closely-related taxa (44 P...
June 16, 2017: Journal of Heredity
keyword
keyword
66104
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"