Citations with the tag: MARINE phytoplankton

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  • Surface distribution of microphytoplankton of the south-west Indian Ocean along a repeat transect...
    Froneman, P.W.; Pakhomov, E.A.; Meaton, V. // South African Journal of Science; Mar98, Vol. 94 Issue 3, p124 

    Investigates the surface chlorophyll-a concentrations, microphytoplankton species composition and distribution along repeat transect between Cape Town and the Prince Edward Islands in early austral autumn 1996. Results of numerical and ordination analyses; Average abundances of...

  • Atlantic algae form bloom bigger than Britain.
    Froneman, P.W.; Pakhomov, E.A.; Meaton, V. // New Scientist; 7/13/91, Vol. 131 Issue 1777, p22 

    Reports that fine weather in the North Atlantic in June 1991 gave oceanographers the best satellite pictures for six years of a Coccolithiophorid bloom caused by the phytoplankton Emiliana huxleyi. Use of the data to study the geochemical role of phytoplankton, which are part of the carbon pump.

  • Iron acquisition by photosynthetic marine phytoplankton from ingested bacteria.
    Maranger, R.; Bird, D.F. // Nature; 11/19/1998, Vol. 396 Issue 6708, p248 

    Focuses on the technique of marine phytoplanktons in absorbing iron. Ingestion of the element from bacterial sources; Efficiency of iron acquisition; Indications that phagotrophic ingestion of bacteria as an adaptive strategy for photosynthetic organisms to obtain iron for growth.

  • COMPARATIVE GENOMICS OF MARINE PHYTOPLANKTON.
    Armbrust, E. V. // Phycologia; Jul2009 Supplement, p5 

    An abstract of the article "Comparative Genomics of Marine Phytoplankton," by E. V. Armbrust is presented.

  • SULFUR: AN UNDERESTIMATED PLAYER IN THE EVOLUTION OF MARINE PHYTOPLANKTON.
    Ratti, S.; Giordano, M. // Phycologia; Jul2009 Supplement, p35 

    An abstract of the article "Sulfur: An Underestimated Player in the Evolution of Marine Phytoplankton," by S. Ratti and M. Giordano, is presented.

  • THE EFFECT OF UV-B ON PHOTOSYNTHESIS AND MOTILITY OF MARINE PHYTOPLANKTON, TETRASELMIS SUECICA.
    Park, J. S.; Han, T. // Phycologia; Jul2009 Supplement, p102 

    An abstract of the article "The Effect of UV-B on Photosynthesis and Motility of Marine Phytoplankton, Tetraselmis Suecica," by J. S. Park and T. Han is presented.

  • Pumping iron in the Pacific.
    Wells, Mark L. // Nature; 3/24/1994, Vol. 368 Issue 6469, p295 

    Tests the hypothesis that iron limits phytoplankton production and biomass in regions of the world's oceans otherwise rich in plant nutrients. Causes of the difference between bottle-scale and mesoscale iron enrichments; Increase in phytoplankton production and biomass upon iron enrichment.

  • Iron limitation of phytoplankton photosynthesis in the equatorial Pacific Ocean.
    Kolber, Zbigniew S.; Barber, Richard T. // Nature; 9/8/1994, Vol. 371 Issue 6493, p145 

    Deals with an experiment conducted in the equatorial Pacific Ocean for studying the role of iron in limiting phytoplankton photosynthesis. Levels of nitrates, phosphates and phytoplankton on surface waters; Details of hypothesis, method, observation and results of experiment; Information on...

  • Particulate dimethylsulphoxide and dimethylsulphoniopropionate in phytoplankton cultures and Scottish coastal waters.
    Angela Hatton; Samuel Wilson // Aquatic Sciences; Sep2007, Vol. 69 Issue 3, p330 

    Abstract.  Dimethylsulphoniopropionate (DMSP), an algal compatible solute, has for many years been considered to play a key role in dimethylsulphide (DMS) production, influencing the concentrations of DMS in sea water available to be transferred to the atmosphere. However, in...

  • The effect of nitrogen limitation on cellular DMSP and DMS release in marine phytoplankton: climate feedback implications.
    William Sunda; Rance Hardison // Aquatic Sciences; Sep2007, Vol. 69 Issue 3, p341 

    Abstract.  The effect of nitrogen limitation on intracellular dimethylsulfoniopropionate (DMSP) and its enzymatic cleavage to dimethylsulfide (DMS) was investigated in semi-continuous cultures of the coccolithophore Emiliania huxleyi and the chain-forming coastal diatom...

  • Fiber optic fluorometer with dipping module.
    Yu. Kul’chin; S. Voznesenskii; E. Gamayunov; A. Gurin; A. Korotenko; A. Mayor; O. Bukin // Measurement Techniques; Jan2008, Vol. 51 Issue 1, p40 

    Abstract  A fiber optic fluorometer with dipping module intended for use in studying the contents of phytoplankton in sea water at different depths is described. Using the device, it is possible to carry out continuous measurements under the conditions of the strongly variable illuminance...

  • Rugulopteryx (Dictyotales, Phaeophyceae), a genus recently introduced to the Mediterranean.
    Verlaque, Marc; Steen, Frédérique; de Clerck, Olivier // Phycologia; Nov2009, Vol. 48 Issue 6, p536 

    The introduction of a common Western Pacific representative of the Dictyotales, Rugulopteryx okamurae (Dawson) I.K. Hwang et al., in european waters was demonstrated for the first time. The species was collected in the coastal lagoon of Thau (France, Mediterranean) in 2002. The specimens from...

  • In situ and remote-sensed chlorophyll fluorescence as indicator of the physiological state of phytoplankton near the Isles Kerguelen (Southern Ocean).
    Timmermans, Klaas R.; van der Woerd, Hendrik J.; Wernand, Marcel R.; Sligting, Merijn; Uitz, Julia; de Baar, Hein J. W. // Polar Biology; May2008, Vol. 31 Issue 5, p617 

    Shipboard and remote-sensed Chlorophyll fluorescence were determined in the natural phytoplankton assemblage above the iron-enriched Kerguelen Plateau and the adjacent high-nutrient, low-Chlorophyll open Southern Ocean. The variance between fluorescence yield and photosynthetic efficiency was...

  • New Record of a Dinoflagellate Species Corythodinium tesselatum (Stein) Loeblich Jr. & Loeblich III from Turkish Coastal Waters of the North-eastern Mediterranean Sea.
    Taš, Seyfettin; Okuš, Erdoǧan; Koray, Tufan // Turkish Journal of Botany; 2006, Vol. 30 Issue 1, p55 

    The dinoflagellate genus Corythodinium (Stein) Loeblich Jr. & Loeblich III and one species belonging to this genus, Corythodinium tesselatum(Stein) Loeblich Jr. & Loeblich III, are reported for the first time from the coastal waters of Turkey (northeastern Mediterranean). The morphological...

  • Ribulose-1,5-bisphosphate carboxylase/oxygenase from thermophilic cyanobacterium Thermosynechococcus elongatus.
    Beata Gubernator; Rafal Bartoszewski; Jaroslaw Kroliczewski; Andrzej Szczepaniak // Photosynthesis Research; Jan2008, Vol. 95 Issue 1, p101 

    Abstract  Ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) can be divided into two branches: the “red-like type” of marine algae and the “green-like type” of cyanobacteria, green algae, and higher plants. We found that the...

  • Sea plants regulate oxygen level.
    Beata Gubernator; Rafal Bartoszewski; Jaroslaw Kroliczewski; Andrzej Szczepaniak // USA Today Magazine; Jun96, Vol. 124 Issue 2613, p11 

    Reports on the function of marine phytoplankton in regulating atmospheric oxygen levels according to study findings by marine scientists Ellery Ingaly and Philippe Van Cappellen. Correlation between phytoplankton populations and oxygen levels; Importance of global oxygen balance to the ...

  • Short communication. Direct and indirect effects of strong grazing by Daphnia galeata on bacterial production in an enclosure experiment.
    Kamjunke, Norbert; Zehrer, Reglindis F. // Journal of Plankton Research; Jun1999, Vol. 21 Issue 6, p1175 

    Bacterial production was stimulated in Daphnia enclosures at the beginning of the experiment due to the release of dissolved organic carbon during Daphnia grazing of algae (sloppy feeding). In contrast, bacterial production decreased in the treatments at the end of the experiment. The decline...

  • First report of the Asian seaweed Sargassum filicinum Harvey (Fucales) in California, USA.
    Kathy Miller; John Engle; Shinya Uwai; Hiroshi Kawai // Biological Invasions; Jul2007, Vol. 9 Issue 5, p609 

    Abstract  We report the occurrence of the brown seaweed Sargassum filicinum Harvey in southern California. Sargassum filicinum is native to Japan and Korea. It is monoecious, a trait that increases its chance of establishment. In October 2003, Sargassum filicinum was collected in Long...

  • A morphological and phylogenetic study of Glaphyrosiphon gen. nov. (Halymeniaceae, Rhodophyta) based on Grateloupia intestinalis with descriptions of two new species: Glaphyrosiphon lindaueri from New Zealand and Glaphyrosiphon chilensis from Chile.
    Hommersand, Max H.; Leister, Geoffrey L.; RamiRez, Maria Eliana; Gabrielson, Paul W.; Nelson, Wendy A. // Phycologia; Nov2010, Vol. 49 Issue 6, p554 

    A new genus, Glaphyrosiphon Hommersand & Leister gen. nov., is proposed to contain the generitype Glaphyrosiphon intestinalis (Harvey) Leister & W.A. Nelson comb. nov., a species known in New Zealand under the name Grateloupia intestinalis (Hooker. f. & Harvey) Setchell ex P.G. Parkinson, and...

  • Evidence for high iron requirements of colonial Phaeocystis antarctica at low irradiance.
    Sedwick, P.; Garcia, N.; Riseman, S.; Marsay, C.; DiTullio, G. // Biogeochemistry; Mar2007, Vol. 83 Issue 1-3, p83 

    We have carried out field and laboratory experiments to examine the iron requirements of colonial Phaeocystis antarctica in the Ross Sea. In December 2003, we performed an iron/light-manipulation bioassay experiment in the Ross Sea polynya, using an algal assemblage dominated by colonial...

  • Contact responses between spores and sporelings of different species, karyological phases and cystocarps of coalescing Rhodophyta.
    Santelices, B.; Correa, J. A.; Hormazábal, M.; Flores, V. // Marine Biology; 2003, Vol. 143 Issue 2, p381 

    Coalescence is a well documented event in many red algal orders. However, it is as yet unknown if genetic compatibility and phylogenetic relationships could be factors limiting coalescence. Using controlled laboratory experiments complemented with cytological and ultrastructural analysis, in...

  • Getting cool with nitrogen.
    Devol, Allan H. // Nature; 1/10/2002, Vol. 415 Issue 6868, p131 

    Reports the effect of variations in the marine nitrogen cycle on glacial-interglacial climate change. Shift of carbon from the ocean to the atmosphere; Correlation of the carbon shift with changes in phytoplankton photosynthesis in the oceans; Implication of reduced marine photosynthesis for...

  • Reduced nitrogen fixation in the glacial ocean inferred from changes in marine nitrogen and....
    Ganeshram, Raja S.; Pedersen, Thomas F.; Calvert, Stephen E.; Francois, Roger // Nature; 1/10/2002, Vol. 415 Issue 6868, p156 

    Investigates the reduced nitrogen fixation in the glacial ocean. Explanation of the lower atmospheric carbon dioxide concentrations during the glacial periods; Stimulation of the productivity of marine phytoplankton; Influence of iron on the increase in the rate of marine nitrogen fixation.

  • Increased ocean carbon export in the Sargasso Sea is countered by its enhanced mesopelagic attenuation.
    Lomas, M. W.; Steinberg, D. K.; Dickey, T.; Carlson, C. A.; Nelson, N. B.; Condon, R. H.; Bates, N. R. // Biogeosciences Discussions; 2009, Vol. 6 Issue 5, p9547 

    Photosynthetic CO2 uptake by oceanic phytoplankton and subsequent export of particulate organic carbon (POC) to the ocean interior comprises a globally significant biological carbon pump, controlled in part by the composition of the planktonic community. The strength and efficiency of this pump...

  • Mesoscale vertical motion and the size structure of phytoplankton in the ocean.
    Rodriguez, Jaime; Tintore, Joaquin; Allen, John T.; Blanco, Jose M.; Gomis, Damia; Reul, Andreas; Ruiz, Javier; Rodriguez, Valeriano; Echevarria, Fidel; Jimenez-Gomez, Francisco // Nature; 3/15/2001, Vol. 410 Issue 6826, p360 

    Focuses on research regarding the size structure of phytoplankton in the ocean. Mention of an experiment that uses an empirical model which relates the magnitude of mesoscale vertical motion to the slope of the size-abundance spectrum of phytoplankton in a frontal ecosystem; Methods; Suggestion...

  • First record of two seaweeds from the Israeli Mediterranean: Galaxaura rugosa (J. Ellis and Solander) J. V. Lamouroux (Rhodophyta) and Codium adhaerens C. Agardh (Chlorophyta).
    HOFFMAN, RAZ; ISRAEL, ALVARO; LIPKIN, YAACOV; DUBINSKY, ZVY; ILUZ, DAVID // Israel Journal of Plant Sciences; 2008, Vol. 56 Issue 1/2, p123 

    Two marine macroalgae have recently been identified using drift algal material collected in the Haifa Bay area, Israel. The first is the red seaweed Galaxaura rugosa, first seen south of Haifa Bay during November 2003 and observed thereafter both within seaweeds washed ashore and at 2-4 m deep...

  • A Jungle in Every Drop.
    Merchant, Harvey // Australasian Science; Mar2003, Vol. 24 Issue 2, p28 

    Provides information on marine microorganisms in Antarctica. Characteristics of the organisms; Difference between phytoplankton and protozoa; Functions of marine microorganisms.

  • Corrigendum.
    Merchant, Harvey // Phycologia; Jan2010, Vol. 49 Issue 1, p105 

    Two corrections to the paper New macroalgal record for the New Zealand region: Cephalocystis furcellata by J. L. Dalen, W. A. Nelson, and M. D. Guiry are presented.

  • Flavodoxin as an in situ marker for iron stress in phytoplankton.
    La Roche, Julie; Boyd, Philip W. // Nature; 8/29/1996, Vol. 382 Issue 6594, p802 

    Concludes that flavodoxin can be used to map rapidly the degree of iron stress in natural marine populations. Previous study demonstrating that iron limitation is responsible for low phytoplankton stocks in the equatorial Pacific; Support of hypothesis that diatoms are iron stressed in the...

  • Stars of the Sea.
    Clarke, Wendy Mitman // Cruising World; Oct2012, Vol. 38 Issue 10, p152 

    The author focuses on marine phytoplankton, also known as algae, which she calls the stars of the sea. She says 50% of the oxygen people breathe is produced by these single-celled plants. She talks about a building that is the new home of the nonprofit research center Bigelow Laboratory for...

  • Effects of dimethylsulfoniopropionate (DMSP) produced by the cordgrass Spartina alterniflora on its epiphytic algal community.
    Gabriella Jackson; Joyce Stuckey // Aquatic Sciences; Sep2007, Vol. 69 Issue 3, p419 

    Abstract.  A range of marine algae produce dimethylsulfoniopropionate (DMSP), but only a few species of higher plants, such as the salt marsh cordgrass Spartina alterniflora, are capable of producing this compound. However, its ecophysiological function in S. alterniflora has not...

  • Light backscattering properties of marine phytoplankton: relationships to cell size, chemical composition and taxonomy.
    Vaillancourt, Robert D.; Brown, Christopher W.; Guillar, Robert R.; Balch, William M. // Journal of Plankton Research; Vol. 26 Issue 2, p191 

    Spectral backscattering coefficients were determined for 29 species of cultured marine plankton representing 12 classes using a fixed-angle backscattering meter. Using a multi-angle scattering meter, the volume scattering function was measured and a proportionality constant (χ) between...

  • Oceanography: Nutrients in remote mode.
    Lévy, Marina // Nature; 9/29/2005, Vol. 437 Issue 7059, p628 

    Cites a study which found that phytoplankton productivity depends on the replenishment of nutrients in surface waters in North Atlantic Ocean. Role of nitrate and phosphate on phytoplankton productivity; Distribution of surface chlorophyll in the North Atlantic; Increase in phytoplankton...

  • Palmer LTER: Photoacclimation in a coastal phytoplankton bloom.
    Schofield, Oscar; Moline, Mark M.; Prézelin, B. B. // Antarctic Journal of the United States; 1995, Vol. 30 Issue 5, p260 

    Focuses on the phytoplankton photo acclimation in the Antarctic Peninsula based on the results of the Palmer Long-Term Ecological Research in May 2005. Importance of phytoplankton photoacclimate to cellular absorption capabilities; Impact of photo acclimation on carbon fixation; Efforts of the...

  • Phototactic response of phytoplankton forming discrete layers within the water column of Lake Bonney, Antarctica.
    Priscu, John C.; Neale, Patrick J. // Antarctic Journal of the United States; 1995, Vol. 30 Issue 5, p301 

    Analyzes phototactic response of phytoplankton forming discrete layers within the water column of Lake Bonney, Antarctica. Hypothesis of researchers concerning phytoplankton distribution within the lake; Assessment of diel water column chlorophyll of phytoplankton in the region; Examination of...

  • Estimation of the phytoplankton productivity in three Estonian lakes.
    Kauer, Tuuli; Arst, Helgi; N�ges, Tiina; Tuvikene, Lea // Estonian Journal of Ecology; 2009, Vol. 58 Issue 4, p297 

    Diurnal variation of the underwater quantum irradiance, the corresponding primary production profiles, and the integral primary production values were estimated by model calculations in three Estonian lakes (Peipsi, V�rtsj�rv, and Harku) for 12 days in the summers of 2007 and 2008. In...

  • Annual cycle of nanophytoplankton in coastal waters of the Barents Sea.
    Druzhkova, E. I.; Makarevich, P. R. // Biology Bulletin; Jul2008, Vol. 35 Issue 4, p428 

    The seasonal dynamics of biomass and size structure of nanophytoplankton in Central Murman (off the southern coast of the Barents Sea) are described according to the results of six-year continuous observations. The pattern of the annual successional cycle indicates that the nanophytoplankton...

  • Multivariate analysis of water quality parameters and phytoplankton composition in the southern of Caspian Sea.
    Saravi, Hassan Nasrollahzadeh; Makhlough, Asieh; Pourgholam, Reza; Din, Zubir Bin; Swee Yeok Foong // International Aquatic Research; Dec2011, Vol. 3 Issue 3, p205 

    This study was conducted to analyze the water quality parameters and biological data of the southern Caspian Sea during two phases, Phase 1 (1996-97) and Phase 2 (2005). The invasion of the southern Caspian Sea by the alien species (Mnemiopsis leidyi) occurred between the two phases. This study...

  • Expansive covers of turf-forming algae on human-dominated coast: the relative effects of increasing nutrient and sediment loads.
    Gorgula, Sonia K.; Connell, Sean D. // Marine Biology; Sep2004, Vol. 145 Issue 3, p613 

    Turf-forming algae form more extensive habitat on subtidal rock adjacent to urban than non-urban coast of South Australia. This pattern is frequently observed on the world�s temperate coasts and is variously considered to be a result of enhanced concentration of nutrients or rates of...

  • The role of diatom resting stages in the onset of the spring bloom in the East China Sea.
    Ishikawa, Akira; Furuya, Ken // Marine Biology; Sep2004, Vol. 145 Issue 3, p633 

    The abundance and species composition of diatoms were investigated along the PN line from the Okinawa Islands to the inner continental shelf in the East China Sea in the early spring of 1996. Viable diatom resting stages in sediments on the shelf were also enumerated by the extinction dilution...

  • The FTO Gene, Implicated in Human Obesity, Is Found Only in Vertebrates and Marine Algae.
    Robbens, Steven; Rouz�, Pierre; Cock, J.; Spring, J�rg; Worden, Alexandra; Peer, Yves // Journal of Molecular Evolution; Jan2008, Vol. 66 Issue 1, p80 

    Human obesity is a main cause of morbidity and mortality. Recently, several studies have demonstrated an association between the FTO gene locus and early onset and severe obesity. To date, the FTO gene has only been discovered in vertebrates. We identified FTO homologs in the complete genome...

  • TiO2 Nanoparticles Are Phototoxic to Marine Phytoplankton.
    Miller, Robert J.; Bennett, Samuel; Keller, Arturo A.; Pease, Scott; Lenihan, Hunter S. // PLoS ONE; Jan2012, Vol. 7 Issue 1, p1 

    Nanoparticulate titanium dioxide (TiO2) is highly photoactive, and its function as a photocatalyst drives much of the application demand for TiO2. Because TiO2 generates reactive oxygen species (ROS) when exposed to ultraviolet radiation (UVR), nanoparticulate TiO2 has been used in antibacterial...

  • Heterogeneous energetic pathways and carbon sources on deep eastern Mediterranean cold seep communities.
    Carlier, Antoine; Ritt, B�n�dicte; Rodrigues, Clara; Sarrazin, Joz�e; Olu, Karine; Grall, Jacques; Clavier, Jacques // Marine Biology; Nov2010, Vol. 157 Issue 11, p2545 

    Cold seep communities in the Mediterranean Sea have only been discovered two decades ago, and their trophic ecology has been the subject of very few studies. We investigated the benthic food web of two deep chemosynthesis-based ecosystems on the Napoli and Amsterdam mud volcanoes (MVs) in the...

  • Dependence between the quantum yield of chlorophyll a fluorescence in marine phytoplankton and trophicity in low irradiance level.
    OSTROWSKA, MIROSŁAWA // Optica Applicata; 2011, Vol. 41 Issue 3, p567 

    The paper presents the dependence of relative fluorescence quantum yield of marine phytoplankton on trophicity (as a measure of trophicity the chlorophyll a concentration was assumed). The dependence was worked out using the following empirical data from different regions of Southern Baltic:...

  • sea·weed.
    OSTROWSKA, MIROSŁAWA // American Heritage Student Science Dictionary; 2009, p305 

    A reference entry for seaweed is presented. It refers to any of various algae or plants that live in ocean waters. Some species are free-floating, while others are attached to the ocean bottom. Seaweed range from the size of a pinhead to large fronds extending up to 100 feet in length.

  • Antimicrobial, Antiplasmid and Cytotoxicity Potentials of Marine Algae Halimeda opuntia and Sarconema filiforme collected from Red Sea Coast.
    Selim, Samy A. // World Academy of Science, Engineering & Technology; 2012, Issue 61, p1154 

    The antimicrobial, antiplasmid and cytotoxic activities of marine algae Halimeda opuntia and Sarconema filiforme were investigated. Antimicrobial bioassay against some human pathogenic bacteria and yeast were conducted using disc diffusion method. Halimeda extract exhibited antibacterial...

  • The sensitivity of dimethyl sulfide production to simulated climate change in the Eastern Antarctic Southern Ocean.
    GABRIC, ALBERT J .; CROPP, ROGER; HIRST, TONY; MARCHANT, HARVEY // Tellus: Series B; Nov2003, Vol. 55 Issue 5, p966 

    Dimethyl sulfide (DMS) is a radiatively active trace gas produced by enzymatic cleavage of its precursor compound, dimethyl sulfoniopropionate (DMSP), which is released by marine phytoplankton in the upper ocean. Once ventilated to the atmosphere, DMS is oxidised to form non-sea-salt sulfate and...

  • Testing the iron hypothesis in ecosystems of the equatorial Pacific Ocean.
    Martin, J. H.; Coale, K. H. // Nature; 9/8/1994, Vol. 371 Issue 6493, p123 

    Deals with an experiment conducted in the equatorial Pacific Ocean for studying the role of iron in phytoplankton growth on surface waters. Description of method, observation and results of experiment; Discussion on results of study; Observations of earlier studies.

  • The Fertile Sea.
    Martin, J. H.; Coale, K. H. // Time; 10/19/1953, Vol. 62 Issue 16, p87 

    The article highlights the claims of Austrian-born chemist Francis Joseph Weiss on sea-growing plants. Weiss reveals that almost all sea-growing plants are microscopic phytoplankton that form the base of a food pyramid. He explains the food cycle involving microscopic phytoplankton. He argues...

  • Applied Biosystems' technology used to analyse biotoxins.
    Martin, J. H.; Coale, K. H. // LC-GC Europe; Mar2006, Vol. 19 Issue 3, p138 

    The article reports that chemical ecologists from the Alfred Wegener Institute in Bremerhaven, Germany are using 4000 Q TRAP LC-MS-MS system and API 2000 LC-MS-MS system from Applied Biosystems to analyze biotoxins produced by marine phytoplankton and cyanobacteria. They also use the 3130xl...

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