An Unaccounted Fraction of Marine Biogenic CaCO3 Particles
Publication Date
October 23, 2012
Journal
PLOS ONE
Authors
Mikal Heldal, Svein Norland, Egil S. Erichsen, T. Frede Thingstad, et al
Volume
7
Issue
10
Pages
e47887
DOI
https://dx.plos.org/10.1371/journal.pone.0047887
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0047887
PubMed
http://www.ncbi.nlm.nih.gov/pubmed/23110119
PubMed Central
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3479124
Europe PMC
http://europepmc.org/abstract/MED/23110119
Web of Science
000310193600034
Scopus
84867866390
Mendeley
http://www.mendeley.com/research/unaccounted-fraction-marine-biogenic-caco3particles
Events
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Mendeley | Further Information

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Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/555196"], "description"=>"<p>Samples were collected at 5 m depth in Raunefjorden, a coastal sampling station south of Bergen, Norway. A) Calcium in the coccolithophore <i>Emiliania huxleyi</i> and in Ca particles estimated from scanning electron microscope counts. B) Total particulate Ca concentration measured by X-ray fluorescence (error bars are SE, n = 3–4) and chl <i>a</i> concentration. Hydrographical data and chl <i>a</i> profiles are shown in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0047887#pone.0047887.s004\" target=\"_blank\">Fig. S4</a>.</p>", "links"=>[], "tags"=>["particles", "chl"], "article_id"=>225694, "categories"=>["Inorganic Chemistry", "Chemistry", "Microbiology"], "users"=>["Mikal Heldal", "Svein Norland", "Egil S. Erichsen", "T. Frede Thingstad", "Gunnar Bratbak"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0047887.g002", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_annual_variation_in_CaCO_3_particles_and_chl_a_/225694", "title"=>"The annual variation in CaCO<sub>3</sub> particles and chl <i>a.</i>", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-23 01:34:54"}
  • {"files"=>["https://ndownloader.figshare.com/files/555084"], "description"=>"<p>Samples were collected at 5 m depth in Raunefjorden, a coastal sampling station south of Bergen, Norway. A and B) Particles resembling bacteria and microcolonies of bacteria. B and D) Particles similar to the Ca carbonates described to precipitate on the cell surface of cultured marine bacteria. E and F) Particles with one flat surface suggesting that they are formed on a surface or interface. G and H) Particles with rhombohedral shape. I and J) Baton like particles resembling Bahaman ooids. All scale bars are 2 µm except in d) where it is 1 µm and f) where it is 10 µm.</p>", "links"=>[], "tags"=>["electron", "microscope", "images", "calcium", "particles"], "article_id"=>225571, "categories"=>["Inorganic Chemistry", "Chemistry", "Microbiology"], "users"=>["Mikal Heldal", "Svein Norland", "Egil S. Erichsen", "T. Frede Thingstad", "Gunnar Bratbak"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0047887.g001", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Scanning_electron_microscope_images_of_marine_calcium_particles_with_different_morphology_/225571", "title"=>"Scanning electron microscope images of marine calcium particles with different morphology.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-23 01:32:51"}
  • {"files"=>["https://ndownloader.figshare.com/files/295692", "https://ndownloader.figshare.com/files/295836", "https://ndownloader.figshare.com/files/295928", "https://ndownloader.figshare.com/files/296014", "https://ndownloader.figshare.com/files/296069", "https://ndownloader.figshare.com/files/296162", "https://ndownloader.figshare.com/files/296223", "https://ndownloader.figshare.com/files/296271", "https://ndownloader.figshare.com/files/296317", "https://ndownloader.figshare.com/files/296349"], "description"=>"<div><p>Biogenic production and sedimentation of calcium carbonate in the ocean, referred to as the carbonate pump, has profound implications for the ocean carbon cycle, and relate both to global climate, ocean acidification and the geological past. In marine pelagic environments coccolithophores, foraminifera and pteropods have been considered the main calcifying organisms. Here, we document the presence of an abundant, previously unaccounted fraction of marine calcium carbonate particles in seawater, presumably formed by bacteria or in relation to extracellular polymeric substances. The particles occur in a variety of different morphologies, in a size range from <1 to >100 µm, and in a typical concentration of 10<sup>4</sup>–10<sup>5</sup> particles L<sup>−1</sup> (size range counted 1–100 µm). Quantitative estimates of annual averages suggests that the pure calcium particles we counted in the 1–100 µm size range account for 2–4 times more CaCO<sub>3</sub> than the dominating coccolithophoride <em>Emiliania huxleyi</em> and for 21% of the total concentration of particulate calcium. Due to their high density, we hypothesize that the particles sediment rapidly, and therefore contribute significantly to the export of carbon and alkalinity from surface waters. The biological and environmental factors affecting the formation of these particles and possible impact of this process on global atmospheric CO<sub>2</sub> remains to be investigated.</p> </div>", "links"=>[], "tags"=>["unaccounted", "biogenic", "particles"], "article_id"=>118244, "categories"=>["Inorganic Chemistry", "Chemistry", "Microbiology"], "users"=>["Mikal Heldal", "Svein Norland", "Egil S. Erichsen", "T. Frede Thingstad", "Gunnar Bratbak"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0047887.s001", "https://dx.doi.org/10.1371/journal.pone.0047887.s002", "https://dx.doi.org/10.1371/journal.pone.0047887.s003", "https://dx.doi.org/10.1371/journal.pone.0047887.s004", "https://dx.doi.org/10.1371/journal.pone.0047887.s005", "https://dx.doi.org/10.1371/journal.pone.0047887.s006", "https://dx.doi.org/10.1371/journal.pone.0047887.s007", "https://dx.doi.org/10.1371/journal.pone.0047887.s008", "https://dx.doi.org/10.1371/journal.pone.0047887.s009", "https://dx.doi.org/10.1371/journal.pone.0047887.s010"], "stats"=>{"downloads"=>5, "page_views"=>12, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/An_Unaccounted_Fraction_of_Marine_Biogenic_CaCO_3_Particles/118244", "title"=>"An Unaccounted Fraction of Marine Biogenic CaCO<sub>3</sub> Particles", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2012-10-23 02:17:24"}

PMC Usage Stats | Further Information

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Relative Metric

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