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  • 1
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    Oceanographic basis of the global surface distribution of Prochlorococcus ecotypes (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-05-13
    Description: By using data collected during a continuous circumnavigation of the Southern Hemisphere, we observed clear patterns in the population-genetic structure of Prochlorococcus, the most abundant photosynthetic organism on Earth, between and within the three Southern Subtropical Gyres. The same mechanisms that were previously invoked to account for the vertical distribution of ecotypes at local scales accounted for the global (horizontal) patterns we observed. Basin-scale and seasonal variations in the structure and strength of vertical stratification provide a basis for understanding large-scale horizontal distribution in genetic and physiological traits of Prochlorococcus, and perhaps of marine microbial communities in general.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bouman, Heather A -- Ulloa, Osvaldo -- Scanlan, David J -- Zwirglmaier, Katrin -- Li, William K W -- Platt, Trevor -- Stuart, Venetia -- Barlow, Ray -- Leth, Ole -- Clementson, Lesley -- Lutz, Vivian -- Fukasawa, Masao -- Watanabe, Shuichi -- Sathyendranath, Shubha -- New York, N.Y. -- Science. 2006 May 12;312(5775):918-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratorio de Procesos Oceanograficos y Clima, Departamento de Oceanografia, and Centro de Investigacion Oceanografica en el Pacifico Sur-Oriental, Universidad de Concepcion, Casilla 160-C, Concepcion, Chile. heather@profc.udec.cl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16690867" target="_blank"〉PubMed〈/a〉
    Keywords: Atlantic Ocean ; Biomass ; Chlorophyll/analysis ; Climate ; Colony Count, Microbial ; *Ecosystem ; Flow Cytometry ; Indian Ocean ; Light ; Oceanography ; Pacific Ocean ; Phytoplankton/*genetics/*growth & development/physiology ; Polymerase Chain Reaction ; Prochlorococcus/classification/*genetics/*growth & development/physiology ; Seasons ; Seawater/*microbiology ; Temperature ; Vinyl Compounds/analysis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Coherent sign switching in multiyear trends of microbial plankton (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-02-25
    Description: Since the 1990s, phytoplankton biomass on the continental shelf of Nova Scotia and in the Labrador Sea has undergone sustained changes in the spring and fall, which are accompanied by changes in bacterioplankton that are dampened in amplitude but coherent in the direction of change. A reversal of trend in biomass change, so-called sign switching, occurs both in time and in space. Thus, whenever (spring or fall) and wherever (Scotian Shelf or Labrador Sea) phytoplankton increase or decrease, so also does bacterioplankton. This tandem sign switch indicates coupling of the trophic levels at a multiyear time scale and contributes to an ecological fingerprint of systemwide forcing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, William K W -- Harrison, W Glen -- Head, Erica J H -- New York, N.Y. -- Science. 2006 Feb 24;311(5764):1157-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada. LiB@mar.dfo-mpo.gc.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16497934" target="_blank"〉PubMed〈/a〉
    Keywords: Atlantic Ocean ; Bacteria/*growth & development ; Biomass ; Chlorophyll/analysis ; *Ecosystem ; Phytoplankton/*growth & development ; Plankton/*growth & development ; Seasons ; Seawater/*microbiology ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Smallest algae thrive as the Arctic Ocean freshens (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-11
    Description: As climate changes and the upper Arctic Ocean receives more heat and fresh water, it becomes more difficult for mixing processes to deliver nutrients from depth to the surface for phytoplankton growth. Competitive advantage will presumably accrue to small cells because they are more effective in acquiring nutrients and less susceptible to gravitational settling than large cells. Since 2004, we have discerned an increase in the smallest algae and bacteria along with a concomitant decrease in somewhat larger algae. If this trend toward a community of smaller cells is sustained, it may lead to reduced biological production at higher trophic levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, William K W -- McLaughlin, Fiona A -- Lovejoy, Connie -- Carmack, Eddy C -- New York, N.Y. -- Science. 2009 Oct 23;326(5952):539. doi: 10.1126/science.1179798.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS B2Y 4A2, Canada. LiB@mar.dfo-mpo.gc.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19900890" target="_blank"〉PubMed〈/a〉
    Keywords: Arctic Regions ; Bacteria/cytology/growth & development ; Biomass ; *Ecosystem ; Eukaryota/cytology/*growth & development ; Oceans and Seas ; Phytoplankton/cytology/*growth & development ; Population Dynamics ; Salinity ; *Seawater/chemistry/microbiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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