keyword
MENU ▼
Read by QxMD icon Read
search

Oceanography

keyword
https://www.readbyqxmd.com/read/28505714/interactions-of-localized-wave-structures-and-dynamics-in-the-defocusing-coupled-nonlinear-schr%C3%A3-dinger-equations
#1
Guoqiang Zhang, Zhenya Yan, Xiao-Yong Wen, Yong Chen
We investigate the defocusing coupled nonlinear Schrödinger equations from a 3×3 Lax pair. The Darboux transformations with the nonzero plane-wave solutions are presented to derive the newly localized wave solutions including dark-dark and bright-dark solitons, breather-breather solutions, and different types of new vector rogue wave solutions, as well as interactions between distinct types of localized wave solutions. Moreover, we analyze these solutions by means of parameters modulation. Finally, the perturbed wave propagations of some obtained solutions are explored by means of systematic simulations, which demonstrates that nearly stable and strongly unstable solutions...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28479280/pelagic-and-benthic-communities-of-the-antarctic-ecosystem-of-potter-cove-genomics-and-ecological-implications
#2
REVIEW
D Abele, S Vazquez, A G J Buma, E Hernandez, C Quiroga, C Held, S Frickenhaus, L Harms, J L Lopez, E Helmke, W P Mac Cormack
Molecular technologies are more frequently applied in Antarctic ecosystem research and the growing amount of sequence-based information available in databases adds a new dimension to understanding the response of Antarctic organisms and communities to environmental change. We apply molecular techniques, including fingerprinting, and amplicon and metagenome sequencing, to understand biodiversity and phylogeography to resolve adaptive processes in an Antarctic coastal ecosystem from microbial to macrobenthic organisms and communities...
May 4, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28451711/human-hair-baltic-grey-seal-halichoerus-grypus-fur-and-herring-gull-larus-argentatus-feathers-as-accumulators-of-bisphenol-a-and-alkylphenols
#3
Iga Nehring, Marta Staniszewska, Lucyna Falkowska
The purpose of the study was to determine the concentration of bisphenol A (BPA), 4-tert-octylphenol (OP), and 4-nonylphenol (NP), in human hair, the fur of Baltic grey seals and the feathers of herring gulls. Hair was collected from 42 volunteers, while grey seal fur (n = 17) came from the seal centre in Hel (Marine Station of Institute of Oceanography, University of Gdansk) and gull covert feathers (n = 26) were collected from dead herring gulls along the Southern Baltic coast. Assays of phenol derivatives were conducted using the high performance liquid chromatography with fluorescence detection technique...
May 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28405400/microbe-biogeography-tracks-water-masses-in-a-dynamic-oceanic-frontal-system
#4
Anni Djurhuus, Philipp H Boersch-Supan, Svein-Ole Mikalsen, Alex D Rogers
Dispersal limitation, not just environmental selection, plays an important role in microbial biogeography. The distance-decay relationship is thought to be weak in habitats where dispersal is high, such as in the pelagic environment, where ocean currents facilitate microbial dispersal. Most studies of microbial community composition to date have observed little geographical heterogeneity on a regional scale (100 km). We present a study of microbial communities across a dynamic frontal zone in the southwest Indian Ocean and investigate the spatial structure of the microbes with respect to the different water masses separated by these fronts...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28300117/oceanography-climate-putting-stress-on-oceans
#5
(no author information available yet)
No abstract text is available yet for this article.
March 15, 2017: Nature
https://www.readbyqxmd.com/read/28282399/phylogeographic-patterning-among-two-codistributed-shrimp-species-crustacea-decapoda-palaemonidae-reveals-high-levels-of-connectivity-across-biogeographic-regions-along-the-south-african-coast
#6
Louisa E Wood, Sammy De Grave, Savel R Daniels
We compare the genetic structuring and demographic history of two sympatric caridean shrimp species with distinct life history traits, one amphidromous species Palaemon capensis and one marine/estuarine species Palaemon peringueyi, in the historical biogeographical context of South Africa. A total of 103 specimens of P. capensis collected from 12 localities and 217 specimens of P. peringueyi collected from 24 localities were sequenced for the mitochondrial cytochrome oxidase one (CO1) locus. Results from analyses of molecular variance (AMOVA), pairwise ΦST comparisons and haplotype networks demonstrate weak to moderate genetic differentiation in P...
2017: PloS One
https://www.readbyqxmd.com/read/28262764/the-origin-of-carbon-isotope-vital-effects-in-coccolith-calcite
#7
H L O McClelland, J Bruggeman, M Hermoso, R E M Rickaby
Calcite microfossils are widely used to study climate and oceanography in Earth's geological past. Coccoliths, readily preserved calcite plates produced by a group of single-celled surface-ocean dwelling algae called coccolithophores, have formed a significant fraction of marine sediments since the Late Triassic. However, unlike the shells of foraminifera, their zooplankton counterparts, coccoliths remain underused in palaeo-reconstructions. Precipitated in an intracellular chemical and isotopic microenvironment, coccolith calcite exhibits large and enigmatic departures from the isotopic composition of abiogenic calcite, known as vital effects...
March 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28239596/genetic-diversity-of-atlantic-bluefin-tuna-in-the-mediterranean-sea-insights-from-genome-wide-snps-and-microsatellites
#8
Aglaia Antoniou, Panagiotis Kasapidis, Georgios Kotoulas, Constantinos C Mylonas, Antonios Magoulas
BACKGROUND: Elucidating the patterns of the Atlantic Bluefin tuna [ABFT, Thunnus thynnus (Linnaeus, 1758)] population structure constitutes a challenging task of great importance. Most of the unique challenges stem from its biology, as well as the attributes of the marine realm in which it disperses. Accurate information is urgently needed for stock assessment, and the identification of critical features to the persistence and adaptation of populations in order to formulate and adopt effective strategies for ABFT conservation and management...
December 2017: Journal of Biological Research
https://www.readbyqxmd.com/read/28096366/iron-isotopes-reveal-distinct-dissolved-iron-sources-and-pathways-in-the-intermediate-versus-deep-southern-ocean
#9
Cyril Abadie, Francois Lacan, Amandine Radic, Catherine Pradoux, Franck Poitrasson
As an essential micronutrient, iron plays a key role in oceanic biogeochemistry. It is therefore linked to the global carbon cycle and climate. Here, we report a dissolved iron (DFe) isotope section in the South Atlantic and Southern Ocean. Throughout the section, a striking DFe isotope minimum (light iron) is observed at intermediate depths (200-1,300 m), contrasting with heavier isotopic composition in deep waters. This unambiguously demonstrates distinct DFe sources and processes dominating the iron cycle in the intermediate and deep layers, a feature impossible to see with only iron concentration data largely used thus far in chemical oceanography...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28017608/biogeography-of-the-global-ocean-s-mesopelagic-zone
#10
Roland Proud, Martin J Cox, Andrew S Brierley
The global ocean's near surface can be partitioned into distinct provinces on the basis of regional primary productivity and oceanography [1]. This ecological geography provides a valuable framework for understanding spatial variability in ecosystem function but has relevance only partway into the epipelagic zone (the top 200 m). The mesopelagic (200-1,000 m) makes up approximately 20% of the global ocean volume, plays important roles in biogeochemical cycling [2], and holds potentially huge fish resources [3-5]...
January 9, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/27922602/elevated-temperature-increases-carbon-and-nitrogen-fluxes-between-phytoplankton-and-heterotrophic-bacteria-through-physical-attachment
#11
Nestor Arandia-Gorostidi, Peter K Weber, Laura Alonso-Sáez, Xosé Anxelu G Morán, Xavier Mayali
Quantifying the contribution of marine microorganisms to carbon and nitrogen cycles and their response to predicted ocean warming is one of the main challenges of microbial oceanography. Here we present a single-cell NanoSIMS isotope analysis to quantify C and N uptake by free-living and attached phytoplankton and heterotrophic bacteria, and their response to short-term experimental warming of 4 °C. Elevated temperature increased total C fixation by over 50%, a small but significant fraction of which was transferred to heterotrophs within 12 h...
March 2017: ISME Journal
https://www.readbyqxmd.com/read/27828967/quantification-and-analysis-of-icebergs-in-a-tidewater-glacier-fjord-using-an-object-based-approach
#12
Robert W McNabb, Jamie N Womble, Anupma Prakash, Rudiger Gens, Christian E Haselwimmer
Tidewater glaciers are glaciers that terminate in, and calve icebergs into, the ocean. In addition to the influence that tidewater glaciers have on physical and chemical oceanography, floating icebergs serve as habitat for marine animals such as harbor seals (Phoca vitulina richardii). The availability and spatial distribution of glacier ice in the fjords is likely a key environmental variable that influences the abundance and distribution of selected marine mammals; however, the amount of ice and the fine-scale characteristics of ice in fjords have not been systematically quantified...
2016: PloS One
https://www.readbyqxmd.com/read/27800161/navigating-uncertain-waters-a-critical-review-of-inferring-foraging-behaviour-from-location-and-dive-data-in-pinnipeds
#13
REVIEW
Matt Ian Daniel Carter, Kimberley A Bennett, Clare B Embling, Philip J Hosegood, Debbie J F Russell
In the last thirty years, the emergence and progression of biologging technology has led to great advances in marine predator ecology. Large databases of location and dive observations from biologging devices have been compiled for an increasing number of diving predator species (such as pinnipeds, sea turtles, seabirds and cetaceans), enabling complex questions about animal activity budgets and habitat use to be addressed. Central to answering these questions is our ability to correctly identify and quantify the frequency of essential behaviours, such as foraging...
2016: Movement Ecology
https://www.readbyqxmd.com/read/27782359/iceberg-killing-fields-limit-huge-potential-for-benthic-blue-carbon-in-antarctic-shallows
#14
David K A Barnes
Climate-forced ice losses are increasing potential for iceberg-seabed collisions, termed ice scour. At Ryder Bay, West Antarctic Peninsula (WAP) sea ice, oceanography, phytoplankton and encrusting zoobenthos have been monitored since 1998. In 2003, grids of seabed markers, covering 225 m(2) , were established, surveyed and replaced annually to measure ice scour frequency. Disturbance history has been recorded for each m(2) of seabed monitored at 5-25 m for ~13 years. Encrusting fauna, collected from impacted and nonimpacted metres each year, show coincident benthos responses in growth, mortality and mass of benthic immobilized carbon...
October 26, 2016: Global Change Biology
https://www.readbyqxmd.com/read/27780191/rapid-submarine-ice-melting-in-the-grounding-zones-of-ice-shelves-in-west-antarctica
#15
Ala Khazendar, Eric Rignot, Dustin M Schroeder, Helene Seroussi, Michael P Schodlok, Bernd Scheuchl, Jeremie Mouginot, Tyler C Sutterley, Isabella Velicogna
Enhanced submarine ice-shelf melting strongly controls ice loss in the Amundsen Sea embayment (ASE) of West Antarctica, but its magnitude is not well known in the critical grounding zones of the ASE's major glaciers. Here we directly quantify bottom ice losses along tens of kilometres with airborne radar sounding of the Dotson and Crosson ice shelves, which buttress the rapidly changing Smith, Pope and Kohler glaciers. Melting in the grounding zones is found to be much higher than steady-state levels, removing 300-490 m of solid ice between 2002 and 2009 beneath the retreating Smith Glacier...
October 25, 2016: Nature Communications
https://www.readbyqxmd.com/read/27734500/the-variable-routes-of-rafting-stranding-dynamics-of-floating-bull-kelp-durvillaea-antarctica-fucales-phaeophyceae-on-beaches-in-the-se-pacific
#16
Boris A López, Erasmo C Macaya, Fadia Tala, Florence Tellier, Martin Thiel
Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could be due to limitations in local supply and dispersal of floating kelps. To test this hypothesis, the spatiotemporal dynamics of kelp strandings were examined in four biogeographic districts along the Chilean coast (28°-42°S)...
October 13, 2016: Journal of Phycology
https://www.readbyqxmd.com/read/27687507/oceanography-promotes-self-recruitment-in-a-planktonic-larval-disperser
#17
Peter R Teske, Jonathan Sandoval-Castillo, Erik van Sebille, Jonathan Waters, Luciano B Beheregaray
The application of high-resolution genetic data has revealed that oceanographic connectivity in marine species with planktonic larvae can be surprisingly limited, even in the absence of major barriers to dispersal. Australia's southern coast represents a particularly interesting system for studying planktonic larval dispersal, as the hydrodynamic regime of the wide continental shelf has potential to facilitate onshore retention of larvae. We used a seascape genetics approach (the joint analysis of genetic data and oceanographic connectivity simulations) to assess population genetic structure and self-recruitment in a broadcast-spawning marine gastropod that exists as a single meta-population throughout its temperate Australian range...
September 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27667909/tuna-and-swordfish-catch-in-the-u-s-northwest-atlantic-longline-fishery-in-relation-to-mesoscale-eddies
#18
Ango C Hsu, Andre M Boustany, Jason J Roberts, Jui-Han Chang, Patrick N Halpin
To analyze the effects of mesoscale eddies, sea surface temperature (SST), and gear configuration on the catch of Atlantic bluefin (Thunnus thynnus), yellowfin (Thunnus albacares), and bigeye tuna (Thunnus obesus) and swordfish (Xiphias gladius) in the U.S. northwest Atlantic longline fishery, we constructed multivariate statistical models relating these variables to the catch of the four species in 62 121 longline hauls made between 1993 and 2005. During the same 13-year period, 103 anticyclonic eddies and 269 cyclonic eddies were detected by our algorithm in the region 30-55°N, 30-80°W...
November 2015: Fisheries Oceanography
https://www.readbyqxmd.com/read/27572966/biogeography-and-environmental-genomics-of-the-roseobacter-affiliated-pelagic-chab-i-5-lineage
#19
Sara Billerbeck, Bernd Wemheuer, Sonja Voget, Anja Poehlein, Helge-Ansgar Giebel, Thorsten Brinkhoff, Lone Gram, Wade H Jeffrey, Rolf Daniel, Meinhard Simon
The identification and functional characterization of microbial communities remains a prevailing topic in microbial oceanography as information on environmentally relevant pelagic prokaryotes is still limited. The Roseobacter group, an abundant lineage of marine Alphaproteobacteria, can constitute large proportions of the bacterioplankton. Roseobacters also occur associated with eukaryotic organisms and possess streamlined as well as larger genomes from 2.2 to >5 Mpb. Here, we show that one pelagic cluster of this group, CHAB-I-5, occurs globally from tropical to polar regions and accounts for up to 22% of the active North Sea bacterioplankton in the summer...
2016: Nature Microbiology
https://www.readbyqxmd.com/read/27441285/latest-quaternary-palaeoceanographic-change-in-the-eastern-north-atlantic-based-upon-a-dinoflagellate-cyst-event-ecostratigraphy
#20
Rex Harland, Irina Polovodova Asteman, Audrey Morley, Angela Morris, Anthony Harris, John A Howe
The analyses of dinoflagellate cyst records, from the latest Quaternary sediments recovered from DSDP Core 610A taken on the Feni Ridge in the southern Rockall Trough, and part of core MD01-2461 on the continental margin of the Porcupine Seabight in the eastern North Atlantic Ocean, has provided evidence for significant oceanographic change encompassing the Last Glacial Maximum (LGM) and part of the Holocene. This together with other published records has led to a regional evaluation of oceanographic change in the eastern North Atlantic over the past 68 ka, based upon a distinctive dinoflagellate event ecostratigraphy...
May 2016: Heliyon
keyword
keyword
102105
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"