keyword
MENU ▼
Read by QxMD icon Read
search

Ocean

keyword
https://www.readbyqxmd.com/read/29345986/vital-signs-seismology-of-icy-ocean-worlds
#1
Steven D Vance, Sharon Kedar, Mark P Panning, Simon C Stähler, Bruce G Bills, Ralph D Lorenz, Hsin-Hua Huang, W T Pike, Julie C Castillo, Philippe Lognonné, Victor C Tsai, Alyssa R Rhoden
Ice-covered ocean worlds possess diverse energy sources and associated mechanisms that are capable of driving significant seismic activity, but to date no measurements of their seismic activity have been obtained. Such investigations could reveal the transport properties and radial structures, with possibilities for locating and characterizing trapped liquids that may host life and yielding critical constraints on redox fluxes and thus on habitability. Modeling efforts have examined seismic sources from tectonic fracturing and impacts...
January 2018: Astrobiology
https://www.readbyqxmd.com/read/29345465/microplastic-abundance-and-composition-in-western-lake-superior-as-determined-via-microscopy-pyr-gc-ms-and-ftir
#2
Erik Hendrickson, Elizabeth C Minor, Kathryn Schreiner
While plastic pollution in marine and freshwater systems is an active area of research, there is not yet an in-depth understanding of the distributions, chemical compositions, and fates of plastics in aquatic environments. In this study, the magnitude, distribution, and common polymers of microplastic pollution in surface waters in western Lake Superior are determined. Analytical methodology, including estimates of ambient contamination during sample collection and processing, are described and employed. Microscopy, Pyrolysis-Gas Chromatography/Mass spectrometry (Pyr-GC/MS), and Fourier Transform Infrared spectroscopy (FTIR) were used to quantify and identify microplastic particles...
January 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29343796/integrated-climate-chemical-indicators-of-diffuse-pollution-from-land-to-water
#3
Per-Erik Mellander, Phil Jordan, Marianne Bechmann, Ophélie Fovet, Mairead M Shore, Noeleen T McDonald, Chantal Gascuel-Odoux
Management of agricultural diffuse pollution to water remains a challenge and is influenced by the complex interactions of rainfall-runoff pathways, soil and nutrient management, agricultural landscape heterogeneity and biogeochemical cycling in receiving water bodies. Amplified cycles of weather can also influence nutrient loss to water although they are less considered in policy reviews. Here, we present the development of climate-chemical indicators of diffuse pollution in highly monitored catchments in Western Europe...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343757/the-early-conversion-of-deep-sea-wood-falls-into-chemosynthetic-hotspots-revealed-by-in-situ-monitoring
#4
D Kalenitchenko, E Péru, L Contreira Pereira, C Petetin, P E Galand, N Le Bris
Wood debris on the ocean floor harbor flourishing communities, which include invertebrate taxa thriving in sulfide-rich habitats belonging to hydrothermal vent and methane seep deep-sea lineages. The formation of sulfidic niches from digested wood material produced by woodborers has been known for a long time, but the temporal dynamics and sulfide ranges encountered on wood falls remains unknown. Here, we show that wood falls are converted into sulfidic hotpots, before the colonization by xylophagaid bivalves...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343708/pteropods-counter-mechanical-damage-and-dissolution-through-extensive-shell-repair
#5
Victoria L Peck, Rosie L Oakes, Elizabeth M Harper, Clara Manno, Geraint A Tarling
The dissolution of the delicate shells of sea butterflies, or pteropods, has epitomised discussions regarding ecosystem vulnerability to ocean acidification over the last decade. However, a recent demonstration that the organic coating of the shell, the periostracum, is effective in inhibiting dissolution suggests that pteropod shells may not be as susceptible to ocean acidification as previously thought. Here we use micro-CT technology to show how, despite losing the entire thickness of the original shell in localised areas, specimens of polar species Limacina helicina maintain shell integrity by thickening the inner shell wall...
January 17, 2018: Nature Communications
https://www.readbyqxmd.com/read/29342451/decadal-changes-in-the-edible-supply-of-seafood-and-methylmercury-exposure-in-the-united-states
#6
Elsie M Sunderland, Miling Li, Kurt Bullard
BACKGROUND: Methylmercury (MeHg) exposure is associated with adverse effects on neurodevelopment and cardiovascular health. Previous work indicates most MeHg is from marine fish sold in the commercial market, but does not fully resolve supply regions globally. This information is critical for linking changes in environmental MeHg levels to human exposure in the U.S. population. OBJECTIVES: We used available data to estimate the geographic origins of seafood consumed in the United States (major ocean basins, coastal fisheries, aquaculture, freshwater) and how shifts in edible supply affected MeHg exposures between 2000-2002 and 2010-2012...
January 16, 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29342263/sri-lanka-s-post-tsunami-health-system-recovery-a-qualitative-analysis-of-physician-perspectives
#7
William Collin Schenk, Thuy Bui
Background: The 2004 Indian Ocean tsunami caused significant damage to the health system in Sri Lanka. Rebuilding infrastructure and improving the mental health system were targets of recovery policies. Retrospective analyses of the post-tsunami health system recovery in Sri Lanka lack the perspectives of local stakeholders, including health care providers. Methods: In 2014 we interviewed 23 Sri Lankan physicians from the Eastern and Southern regions. Participants were recruited with snowball sampling...
January 12, 2018: International Health
https://www.readbyqxmd.com/read/29340255/habitat-use-in-south-west-european-skinks-genus-chalcides
#8
Daniel Escoriza, Guillem Pascual, Alberto Sánchez-Vialas
Background: Congeneric species of reptiles frequently exhibit partitioning in terms of their use of habitats or trophic resources in order to reduce competition. In this study, we investigated habitat use by two species of European skinks: Chalcides bedriagai and Chalcides striatus, based on 49 records from southern France, Spain, and Portugal. Methods: We measured three levels of niche descriptors: macroscale (climate, topography, and substrate), mesoscale (plant associations), and microscale (vegetation cover and shelters)...
2018: PeerJ
https://www.readbyqxmd.com/read/29340239/fastviromeexplorer-a-pipeline-for-virus-and-phage-identification-and-abundance-profiling-in-metagenomics-data
#9
Saima Sultana Tithi, Frank O Aylward, Roderick V Jensen, Liqing Zhang
With the increase in the availability of metagenomic data generated by next generation sequencing, there is an urgent need for fast and accurate tools for identifying viruses in host-associated and environmental samples. In this paper, we developed a stand-alone pipeline called FastViromeExplorer for the detection and abundance quantification of viruses and phages in large metagenomic datasets by performing rapid searches of virus and phage sequence databases. Both simulated and real data from human microbiome and ocean environmental samples are used to validate FastViromeExplorer as a reliable tool to quickly and accurately identify viruses and their abundances in large datasets...
2018: PeerJ
https://www.readbyqxmd.com/read/29339823/phosphate-insensitive-aminophosphonate-mineralisation-within-oceanic-nutrient-cycles
#10
Jason P Chin, John P Quinn, John W McGrath
Many areas of the ocean are nutrient-poor yet support large microbial populations, leading to intense competition for and recycling of nutrients. Organic phosphonates are frequently found in marine waters, but require specialist enzymes for catabolism. Previous studies have shown that the genes that encode these enzymes in marine systems are under Pho regulon control and so are repressed by inorganic phosphate. This has led to the conclusion that phosphonates are recalcitrant in much of the ocean, where phosphorus is not limiting despite the degradative genes being common throughout the marine environment...
January 16, 2018: ISME Journal
https://www.readbyqxmd.com/read/29339497/ocean-convergence-and-the-dispersion-of-flotsam
#11
Eric A D'Asaro, Andrey Y Shcherbina, Jody M Klymak, Jeroen Molemaker, Guillaume Novelli, Cédric M Guigand, Angelique C Haza, Brian K Haus, Edward H Ryan, Gregg A Jacobs, Helga S Huntley, Nathan J M Laxague, Shuyi Chen, Falco Judt, James C McWilliams, Roy Barkan, A D Kirwan, Andrew C Poje, Tamay M Özgökmen
Floating oil, plastics, and marine organisms are continually redistributed by ocean surface currents. Prediction of their resulting distribution on the surface is a fundamental, long-standing, and practically important problem. The dominant paradigm is dispersion within the dynamical context of a nondivergent flow: objects initially close together will on average spread apart but the area of surface patches of material does not change. Although this paradigm is likely valid at mesoscales, larger than 100 km in horizontal scale, recent theoretical studies of submesoscales (less than ∼10 km) predict strong surface convergences and downwelling associated with horizontal density fronts and cyclonic vortices...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29339335/potential-impacts-of-offshore-oil-spills-on-polar-bears-in-the-chukchi-sea
#12
Ryan R Wilson, Craig Perham, Deborah P French-McCay, Richard Balouskus
Sea ice decline is anticipated to increase human access to the Arctic Ocean allowing for offshore oil and gas development in once inaccessible areas. Given the potential negative consequences of an oil spill on marine wildlife populations in the Arctic, it is important to understand the magnitude of impact a large spill could have on wildlife to inform response planning efforts. In this study we simulated oil spills that released 25,000 barrels of oil for 30 days in autumn originating from two sites in the Chukchi Sea (one in Russia and one in the U...
January 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29339332/human-perturbation-increases-the-fluxes-of-dissolved-molybdenum-from-land-to-ocean-the-case-of-the-jiulong-river-in-china
#13
Deli Wang, Shuimiao Lu, Nengwang Chen, Minhan Dai, Céline Guéguen
Rivers contribute a substantial amount of trace metals including molybdenum (Mo) into the oceans. The driving forces controlling the riverine fluxes of dissolved metals still remain not fully understood. Our study then investigated the spatial variations of dissolved metals including molybdenum in a typically human perturbed river, the Jiulong River (JR), China. The aim of the study is to elucidate the relevance of anthropogenic perturbation on the fluxes of dissolved metals such as molybdenum from land to ocean...
January 12, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29338560/scientists-instruments-and-even-brains-in-transfer-german-spanish-postwar-networks-and-the-construction-of-the-neuroendocrine-system-1952-1960
#14
Raúl Velasco Morgado
This article presents the process of relocation of hegemonies and "center-periphery" dynamics in neuroanatomy after World War II through the study of the links between the Spanish anatomical school of José Escolar García and some German institutions. We have analyzed their works on the morphology of the neuroendocrine system as a case study, showing how the first contacts of the Spaniards with the United States started a material transfer process between centers on both sides of the Atlantic Ocean through the mediation-and adaptation-of the periphery...
January 1, 2018: Neuroscientist: a Review Journal Bringing Neurobiology, Neurology and Psychiatry
https://www.readbyqxmd.com/read/29338021/coral-physiology-and-microbiome-dynamics-under-combined-warming-and-ocean-acidification
#15
Andréa G Grottoli, Paula Dalcin Martins, Michael J Wilkins, Michael D Johnston, Mark E Warner, Wei-Jun Cai, Todd F Melman, Kenneth D Hoadley, D Tye Pettay, Stephen Levas, Verena Schoepf
Rising seawater temperature and ocean acidification threaten the survival of coral reefs. The relationship between coral physiology and its microbiome may reveal why some corals are more resilient to these global change conditions. Here, we conducted the first experiment to simultaneously investigate changes in the coral microbiome and coral physiology in response to the dual stress of elevated seawater temperature and ocean acidification expected by the end of this century. Two species of corals, Acropora millepora containing the thermally sensitive endosymbiont C21a and Turbinaria reniformis containing the thermally tolerant endosymbiont Symbiodinium trenchi, were exposed to control (26...
2018: PloS One
https://www.readbyqxmd.com/read/29337934/depths-of-space-oceans-and-politics
#16
Mariette DiChristina
No abstract text is available yet for this article.
January 16, 2018: Scientific American
https://www.readbyqxmd.com/read/29337911/throughput-analysis-on-3-dimensional-underwater-acoustic-network-with-one-hop-mobile-relay
#17
Xuefeng Zhong, Fangjiong Chen, Jiasheng Fan, Quansheng Guan, Fei Ji, Hua Yu
Underwater acoustic communication network (UACN) has been considered as an essential infrastructure for ocean exploitation. Performance analysis of UACN is important in underwater acoustic network deployment and management. In this paper, we analyze the network throughput of three-dimensional randomly deployed transmitter-receiver pairs. Due to the long delay of acoustic channels, complicated networking protocols with heavy signaling overhead may not be appropriate. In this paper, we consider only one-hop or two-hop transmission, to save the signaling cost...
January 16, 2018: Sensors
https://www.readbyqxmd.com/read/29337314/the-reconstruction-of-2-631-draft-metagenome-assembled-genomes-from-the-global-oceans
#18
Benjamin J Tully, Elaina D Graham, John F Heidelberg
Microorganisms play a crucial role in mediating global biogeochemical cycles in the marine environment. By reconstructing the genomes of environmental organisms through metagenomics, researchers are able to study the metabolic potential of Bacteria and Archaea that are resistant to isolation in the laboratory. Utilizing the large metagenomic dataset generated from 234 samples collected during the Tara Oceans circumnavigation expedition, we were able to assemble 102 billion paired-end reads into 562 million contigs, which in turn were co-assembled and consolidated in to 7...
January 16, 2018: Scientific Data
https://www.readbyqxmd.com/read/29337079/rising-pco2-in-freshwater-ecosystems-has-the-potential-to-negatively-affect-predator-induced-defenses-in-daphnia
#19
Linda C Weiss, Leonie Pötter, Annika Steiger, Sebastian Kruppert, Uwe Frost, Ralph Tollrian
Anthropogenically released CO2 accumulates in the global carbon cycle and is anticipated to imbalance global carbon fluxes [1]. For example, increased atmospheric CO2 induces a net air-to-sea flux where the oceans take up large amounts of atmospheric CO2 (i.e., ocean acidification [2-5]). Research on ocean acidification is ongoing, and studies have demonstrated the consequences for ecosystems and organismal biology with major impacts on marine food webs, nutrient cycles, overall productivity, and biodiversity [6-9]...
January 9, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29337074/in-situ-clock-shift-reveals-that-the-sun-compass-contributes-to-orientation-in-a-pelagic-seabird
#20
Oliver Padget, Sarah L Bond, Marwa M Kavelaars, Emiel van Loon, Mark Bolton, Annette L Fayet, Martyna Syposz, Stephen Roberts, Tim Guilford
Compass orientation is central to the control of animal movement from the scale of local food-caching movements around a familiar area in parids [1] and corvids [2, 3] to the first autumn vector navigation of songbirds embarking on long-distance migration [4-6]. In the study of diurnal birds, where the homing pigeon, Columba livia, has been the main model, a time-compensated sun compass [7] is central to the two-step map-and-compass process of navigation from unfamiliar places, as well as guiding movement via a representation of familiar area landmarks [8-12]...
January 5, 2018: Current Biology: CB
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"