Now showing items 2880-2899 of 6163

    • Iron and Prochlorococcus 

      Thompson, Anne Williford (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-06)
      Iron availability and primary productivity in the oceans are intricately linked through photosynthesis. At the global scale we understand how iron addition induces phytoplankton blooms through meso-scale iron-addition ...
    • Iron availability limits the ocean nitrogen inventory stabilizing feedbacks between marine denitrification and nitrogen fixation 

      Moore, J. Keith; Doney, Scott C. (American Geophysical Union, 2007-04-04)
      Recent upward revisions in key sink/source terms for fixed nitrogen (N) in the oceans imply a short residence time and strong negative feedbacks involving denitrification and N fixation to prevent large swings in the ocean ...
    • The iron budget in ocean surface waters in the 20th and 21st centuries : projections by the Community Earth System Model version 1 

      Misumi, Kazuhiro; Lindsay, Keith; Moore, J. Keith; Doney, Scott C.; Bryan, Frank O.; Tsumune, Daisuke; Yoshida, Yoshikatsu (Copernicus Publications on behalf of the European Geosciences Union, 2014-01-04)
      We investigated the simulated iron budget in ocean surface waters in the 1990s and 2090s using the Community Earth System Model version 1 and the Representative Concentration Pathway 8.5 future CO2 emission scenario. We ...
    • The iron content of sediment samples in New York Bight obtained during R/V Caryn cruise 108, October 19 - 24, 1956 

      Corwin, N.; Ketchum, Bostwick H. (Woods Hole Oceanographic Institution, 1957)
      During R/V CARYN Cruise No. 108 to the New York Bight samples of the bottom were obtained with an orange peel dredge at 23 stations and additional bottom samples were obtained by aqualung divers. These samples have been ...
    • Iron in the Sargasso Sea (Bermuda Atlantic Time-series Study region) during summer : eolian imprint, spatiotemporal variability, and ecological implications 

      Sedwick, Peter N.; Church, Thomas M.; Bowie, Andrew R.; Marsay, Christopher M.; Ussher, Simon J.; Achilles, K. M.; Lethaby, P. J.; Johnson, Rodney J.; Sarin, M. M.; McGillicuddy, Dennis J. (American Geophysical Union, 2005-10-13)
      We report iron measurements for water column and aerosol samples collected in the Sargasso Sea during July-August 2003 (summer 2003) and April-May 2004 (spring 2004). Our data reveal a large seasonal change in the dissolved ...
    • Iron isotope fractionation in subterranean estuaries 

      Rouxel, Olivier J.; Sholkovitz, Edward R.; Charette, Matthew A.; Edwards, Katrina J. (2008-04-25)
      Dissolved Fe concentrations in subterranean estuaries, like their river-seawater counterparts, are strongly controlled by non-conservative behavior during mixing of groundwater and seawater in coastal aquifers. Previous ...
    • Iron isotope systematics in estuaries : the case of North River, Massachusetts (USA) 

      Escoube, Raphaelle; Rouxel, Olivier J.; Sholkovitz, Edward R.; Donard, Olivier F. X. (2009-04)
      Recent studies have suggested that rivers may present an isotopically light Fe source to the oceans. Since the input of dissolved iron from river water is generally controlled by flocculation processes that occur during ...
    • Iron limitation and the role of siderophores in marine Synechococcus 

      Rivers, Adam R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-06)
      Marine cyanobacteria in the genus Synechococcus are widely distributed and contribute significantly to global primary productivity. In many parts of the ocean their growth is limited by a lack of iron, an essential ...
    • Iron limitation of a springtime bacterial and phytoplankton community in the Ross Sea : implications for vitamin B12 nutrition 

      Bertrand, Erin M.; Saito, Mak A.; Lee, Peter A.; Dunbar, Robert B.; Sedwick, Peter N.; DiTullio, Giacomo R. (Frontiers Media, 2011-08-15)
      The Ross Sea is home to some of the largest phytoplankton blooms in the Southern Ocean. Primary production in this system has previously been shown to be iron limited in the summer and periodically iron and vitamin B12 ...
    • Iron persistence in a distal hydrothermal plume supported by dissolved–particulate exchange 

      Fitzsimmons, Jessica N.; John, Seth G.; Marsay, Christopher M.; Hoffman, Colleen L.; Nicholas, Sarah L.; Toner, Brandy M.; German, Christopher R.; Sherrell, Robert M. (2017-01)
      Hydrothermally-sourced dissolved metals have been recorded in all ocean basins. In the oceans’ largest known hydrothermal plume, extending westward across the Pacific from the Southern East Pacific Rise, dissolved iron and ...
    • Iron stress in open-ocean cyanobacteria (Synechococcus, Trichodesmium, and Crocosphaera spp.) : identification of the IdiA protein 

      Webb, Eric A.; Moffett, James W.; Waterbury, John B. (American Society for Microbiology, 2001-12)
      Cyanobacteria are prominent constituents of the marine biosphere that account for a significant percentage of oceanic primary productivity. In an effort to resolve how open-ocean cyanobacteria persist in regions where the ...
    • Iron supply and demand in an Antarctic shelf ecosystem 

      McGillicuddy, Dennis J.; Sedwick, Peter N.; Dinniman, M. S.; Arrigo, Kevin R.; Bibby, Thomas S.; Greenan, Blair J. W.; Hofmann, Eileen E.; Klinck, John M.; Smith, Walker O.; Mack, S. L.; Marsay, Christopher M.; Sohst, Bettina M.; van Dijken, Gert L. (John Wiley & Sons, 2015-10-08)
      The Ross Sea sustains a rich ecosystem and is the most productive sector of the Southern Ocean. Most of this production occurs within a polynya during the November–February period, when the availability of dissolved iron ...
    • Iron-binding ligands in the Southern California Current System : mechanistic studies 

      Bundy, Randelle M.; Jiang, Mingshun; Carter, Melissa; Barbeau, Katherine A. (Frontiers Media, 2016-03-15)
      The distributions of dissolved iron and organic iron-binding ligands were examined in water column profiles and deckboard incubation experiments in the southern California Current System (sCCS) along a transition from ...
    • Irreversibly increased nitrogen fixation in Trichodesmium experimentally adapted to elevated carbon dioxide 

      Hutchins, David A.; Walworth, Nathan G.; Webb, Eric A.; Saito, Mak A.; Moran, Dawn M.; McIlvin, Matthew R.; Gale, Jasmine; Fu, Fei-Xue (Nature Publishing Group, 2015-09-01)
      Nitrogen fixation rates of the globally distributed, biogeochemically important marine cyanobacterium Trichodesmium increase under high carbon dioxide (CO2) levels in short-term studies due to physiological plasticity. ...
    • Is biological productivity enhanced at the New England shelfbreak front? 

      Zhang, Weifeng G.; McGillicuddy, Dennis J.; Gawarkiewicz, Glen G. (John Wiley & Sons, 2013-01-31)
      A two-dimensional (cross-shelf) numerical model of the mean seasonal circulation offshore of southern New England predicts upwelling at the shelfbreak front. Expected ramifications of this upwelling include enhancement of ...
    • Is global ocean sprawl a cause of jellyfish blooms? 

      Duarte, Carlos M.; Pitt, Kylie A.; Lucas, Cathy H.; Purcell, Jennifer E.; Uye, Shin-Ichi; Robinson, Kelly L.; Brotz, Lucas; Decker, Mary Beth; Sutherland, Kelly R.; Malej, Alenka; Madin, Laurence P.; Mianzan, Hermes; Gili, Josep-Maria; Fuentes, Veronica; Atienza, Dacha; Pages, Francesc; Breitburg, Denise; Malek, Jennafer; Graham, William M.; Condon, Robert H. (Ecological Society of America, 2012-09-07)
      Jellyfish (Cnidaria, Scyphozoa) blooms appear to be increasing in both intensity and frequency in many coastal areas worldwide, due to multiple hypothesized anthropogenic stressors. Here, we propose that the proliferation ...
    • Is the Faroe Bank Channel overflow hydraulically controlled? 

      Girton, James B.; Pratt, Lawrence J.; Sutherland, David A.; Price, James F. (American Meteorological Society, 2006-12)
      The overflow of dense water from the Nordic Seas through the Faroe Bank Channel (FBC) has attributes suggesting hydraulic control—primarily an asymmetry across the sill reminiscent of flow over a dam. However, this aspect ...
    • iSAM2 : incremental smoothing and mapping using the Bayes tree 

      Kaess, Michael; Johannsson, Hordur; Roberts, Richard; Ila, Viorela; Leonard, John J.; Dellaert, Frank (2011-04-06)
      We present a novel data structure, the Bayes tree, that provides an algorithmic foundation enabling a better understanding of existing graphical model inference algorithms and their connection to sparse matrix factorization ...
    • Isolating the hydrodynamic triggers of the dive response in eastern oyster larvae 

      Wheeler, Jeanette D.; Helfrich, Karl R.; Anderson, Erik J.; Mullineaux, Lauren S. (John Wiley & Sons, 2015-05-06)
      Understanding the behavior of larval invertebrates during planktonic and settlement phases remains an open and intriguing problem in larval ecology. Larvae modify their vertical swimming behavior in response to water column ...
    • Isolation and characterization of novel psychrophilic, neutrophilic, Fe-oxidizing, chemolithoautotrophic α- and γ-proteobacteria from the deep sea 

      Edwards, Katrina J.; Rogers, Daniel R.; Wirsen, Carl O.; McCollom, Thomas M. (American Society for Microbiology, 2003-05)
      We report the isolation and physiological characterization of novel, psychrophilic, iron-oxidizing bacteria (FeOB) from low-temperature weathering habitats in the vicinity of the Juan de Fuca deep-sea hydrothermal area. ...