Now showing items 532-551 of 921

    • Microbial interactions associated with biofilms attached to Trichodesmium spp. and detrital particles in the ocean 

      Hmelo, Laura R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-06)
      Quorum sensing (QS) via acylated homoserine lactones (AHLs) was discovered in the ocean, yet little is known about its role in the ocean beyond its involvement in certain symbiotic interactions. The objectives of this ...
    • Microbial production and consumption of marine dissolved organic matter 

      Becker, Jamie W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-06)
      Marine phytoplankton are the principal producers of oceanic dissolved organic matter (DOM), the organic substrate responsible for secondary production by heterotrophic microbes in the sea. Despite the importance of DOM ...
    • Microbial- and thiosulfate-mediated dissolution of mercury sulfide minerals and transformation to gaseous mercury 

      Vazquez-Rodriguez, Adiari I.; Hansel, Colleen M.; Zhang, Tong; Lamborg, Carl H.; Santelli, Cara M.; Webb, Samuel M.; Brooks, Scott C. (Frontiers Media, 2015-06-23)
      Mercury (Hg) is a toxic heavy metal that poses significant environmental and human health risks. Soils and sediments, where Hg can exist as the Hg sulfide mineral metacinnabar (β-HgS), represent major Hg reservoirs in ...
    • Minor revision to V4 region SSU rRNA 806R gene primer greatly increases detection of SAR11 bacterioplankton 

      Apprill, Amy; McNally, Sean; Parsons, Rachel; Webe, Laura (Inter-Research, 2015-06-04)
      High-throughput sequencing of small subunit ribosomal RNA (SSU rRNA) genes from marine environments is a widely applied method used to uncover the composition of microbial communities. We conducted an analysis of surface ...
    • A model for uranium, rhenium, and molybdenum diagenesis in marine sediments based on results from coastal locations 

      Morford, Jennifer L.; Martin, William R.; Francois, Roger; Carney, Caitlin M. (2008-12-31)
      The purpose of this research is to characterize the mobilization and immobilization processes that control the authigenic accumulation of uranium (U), rhenium (Re) and molybdenum (Mo) in marine sediments. We analyzed ...
    • Modeling comprehensive chemical composition of weathered oil following a marine spill to predict ozone and potential secondary aerosol formation and constrain transport pathways 

      Drozd, Greg T.; Worton, David R.; Aeppli, Christoph; Reddy, Christopher M.; Zhang, Haofei; Variano, Evan; Goldstein, Allen H. (John Wiley & Sons, 2015-11-09)
      Releases of hydrocarbons from oil spills have large environmental impacts in both the ocean and atmosphere. Oil evaporation is not simply a mechanism of mass loss from the ocean, as it also causes production of atmospheric ...
    • Modeling deep ocean shipping noise in varying acidity conditions 

      Udovydchenkov, Ilya A.; Duda, Timothy F.; Doney, Scott C.; Lima, Ivan D. (Acoustical Society of America, 2010-08-19)
      Possible future changes of ambient shipping noise at 0.1–1 kHz in the North Pacific caused by changing seawater chemistry conditions are analyzed with a simplified propagation model. Probable decreases of pH would cause ...
    • Modeling denitrification in aquatic sediments 

      Fennel, Katja; Brady, Damian; DiToro, Dominic; Fulweiler, Robinson W.; Gardner, Wayne S.; Giblin, Anne E.; McCarthy, Mark J.; Rao, Alexandra; Seitzinger, Sybil P.; Thouvenot-Korppoo, Marie; Tobias, Craig R. (2008-10-10)
      Sediment denitrification is a major pathway of fixed nitrogen loss from aquatic systems. Due to technical difficulties in measuring this process and its spatial and temporal variability, estimates of local, regional and ...
    • A modeling study of the seasonal oxygen budget of the global ocean 

      Jin, X.; Najjar, Raymond G.; Louanchi, F.; Doney, Scott C. (American Geophysical Union, 2007-05-09)
      An ecosystem model embedded in a global ocean general circulation model is used to quantify roles of biological and physical processes on seasonal oxygen variations. We find that the thermally induced seasonal net outgassing ...
    • Modeling the global ocean iron cycle 

      Parekh, Payal; Follows, Michael J.; Boyle, Edward A. (American Geophysical Union, 2004-01-07)
      We describe a model of the ocean transport and biogeochemical cycling of iron and the subsequent control on export production and macronutrient distributions. Ocean transport of phosphorus and iron are represented by a ...
    • Models : tools for synthesis in international oceanographic research programs 

      McGillicuddy, Dennis J.; deYoung, Brad; Doney, Scott C.; Glibert, Patricia M.; Stammer, Detlef; Werner, Francisco E. (Oceanography Society, 2010-09)
      Through its promotion of coordinated international research programs, the Intergovernmental Oceanographic Commission (IOC) has facilitated major progress on some of the most challenging problems in oceanography. Issues ...
    • A modified wire clamp system for thirty-liter Niskin bottles 

      Hammar, Terence R.; Sachs, Peter L.; Bacon, Michael P. (Woods Hole Oceanographic Institution, 1988-11)
      A modified clamping system for 30-liter Niskin bottles, consisting of a wire stop, a socket block, and a toggle clamp, has been designed and has been tested at sea. The modified system makes deployment and recovery of the ...
    • Moist synoptic transport of CO2 along the mid-latitude storm track 

      Parazoo, N. C.; Denning, A. S.; Berry, J. A.; Wolf, Aaron S.; Randall, D. A.; Kawa, S. Randolph; Pauluis, O.; Doney, Scott C. (American Geophysical Union, 2011-05-12)
      Atmospheric mixing ratios of CO2 are strongly seasonal in the Arctic due to mid-latitude transport. Here we analyze the seasonal influence of moist synoptic storms by diagnosing CO2 transport from a global model on moist ...
    • Molecular and isotopic records of combustion inputs to the environment over the last 250 years 

      Lima, Ana Lucia Cessel de (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2004-06)
      The most ubiquitous source of polycyclic aromatic hydrocarbons (PAHs) to the environment is incomplete combustion. This study generated a high-resolution historical record of pyrogenic PAH emissions since pre-industrial ...
    • Molecular and radiocarbon constraints on sources and degradation of terrestrial organic carbon along the Kolyma paleoriver transect, East Siberian Sea 

      Vonk, Jorien E.; Sanchez-Garcia, L.; Semiletov, Igor P.; Dudarev, Oleg V.; Eglinton, Timothy I.; Andersson, A.; Gustafsson, Orjan (Copernicus Publications on behalf of the European Geosciences Union, 2010-10-14)
      Climate warming in northeastern Siberia may induce thaw-mobilization of the organic carbon (OC) now held in permafrost. This study investigated the composition of terrestrial OC exported to Arctic coastal waters to both ...
    • Molecular biogeochemistry of modern and ancient marine microbes 

      Waldbauer, Jacob R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-02)
      Biological activity has shaped the surface of the earth in numerous ways, but life’s most pervasive and persistent global impact has been the secular oxidation of the surface environment. Through primary production – the ...
    • Molecular characterization of dissolved organic matter associated with the Greenland ice sheet 

      Bhatia, Maya P.; Das, Sarah B.; Longnecker, Krista; Charette, Matthew A.; Kujawinski, Elizabeth B. (2010-03-16)
      Subsurface microbial oxidation of overridden soils and vegetation beneath glaciers and ice sheets may affect global carbon budgets on glacial-interglacial timescales. The likelihood and magnitude of this process depends ...
    • Molecular determination of marine iron ligands by mass spectrometry 

      Boiteau, Rene M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2016-02)
      Marine microbes produce a wide variety of metal binding organic ligands that regulate the solubility and availability of biologically important metals such as iron, copper, cobalt, and zinc. In marine environments where ...
    • Molecular evidence of Late Archean archaea and the presence of a subsurface hydrothermal biosphere 

      Ventura, Gregory T.; Kenig, Fabien; Reddy, Christopher M.; Schieber, Juergen; Frysinger, Glenn S.; Nelson, Robert K.; Dinel, Etienne; Gaines, Richard B.; Schaeffer, Philippe (2006-12-13)
      Highly cracked and isomerized archaeal lipids and bacterial lipids, structurally changed by thermal stress, are present in solvent extracts of 2,707-2,685 million year old (Ma) metasedimentary rocks from Timmins, Ontario, ...
    • Molecular level characterization of methyl sugars in marine high molecular weight dissolved organic matter 

      Panagiotopoulos, Christos; Repeta, Daniel J.; Mathieu, Laura; Rontani, Jean-Francois; Sempere, Richard (2013-03-04)
      Dissolved organic matter (DOM) is the largest active organic carbon reservoir in the ocean (662 Gt C), a major fraction (> 95%) of which remains chemically uncharacterized. The concentration and isolation of DOM from ...