PANGAEA - Publishing Network for Geoscientific & Environmental Data
The information system PANGAEA is operated as an Open Access library aimed at archiving, publishing and distributing georeferenced data from earth system research. The system guarantees long-term availability of its content through a commitment of the operating institutions.
Abundance of bacteria and virus during the Meteor cruise M87/1 - Paulsen, Maria Lund; Riisgaard, Karen; Nielsen, Torkel Gissel
In temperate, subpolar and polar marine systems, the classical perception that bacteria are carbon limited by end of winter and respond in activity and abundance to the production of new carbon during the diatom spring bloom and post bloom. Contrary to this view, we here document an strong increase in bacterial abundance and activity (latter measured by increasing high nuclei acid (HNA) to low nuclei acid (LNA) bacteria ratio) during the winter-spring transition, where phytoplankton smaller than 10 µm dominate. Further DNA-virus were enumerated and revealed the virus to bacteria ratio (VBR) to be decreasing during winter-spring transition, indicating that...
Vertical profiles of environmental parameters measured on discrete water samples collected with Niskin bottles at station TARA_051 during the Tara Oceans expedition 2009-2013 - Picheral, Marc; Searson, Sarah; Taillandier, Vincent; Bricaud, Annick; Boss, Emmanuel; Ras, Josephine; Claustre, Hervé; Ouhssain, Mustapha; Morin, Pascal; Coppola, Laurent; Gattuso, Jean-Pierre; Metzl, Nicolas; Thuillier, Doris; Stemmann, Lars; Gorsky, Gabriel; Tara Oceans Consortium, Coordinators; Tara Oceans Expedition, Participants
The Tara Oceans Expedition (2009-2013) was a global survey of ocean ecosystems aboard the Sailing Vessel Tara. It carried out extensive measurements of evironmental conditions and collected plankton (viruses, bacteria, protists and metazoans) for later analysis using modern sequencing and state-of-the-art imaging technologies. Tara Oceans Data are particularly suited to study the genetic, morphological and functional diversity of plankton. The present data set includes properties of seawater, particulate matter and dissolved matter that were measured from discrete water samples collected with Niskin bottles during the 2009-2013 Tara Oceans expedition. Properties include pigment concentrations from HPLC analysis (10 depths per vertical...
Abundance of pico- and nanophytoplankton during the Meteor cruise M87/1 - Paulsen, Maria Lund; Riisgaard, Karen; Nielsen, Torkel Gissel
In temperate, subpolar and polar marine systems, the classical perception is that diatoms initiate the spring bloom and thereby mark the beginning of the productive season. Contrary to this view, here we document an pre-bloom of pico- and nanophytoplankton prior to the diatom bloom; a period with excess nutrients and deep convection of the water column. During repeated visits to stations in the deep Icelandic and the Norwegian Basins and the shallow Shetland Shelf (26 March to 29 April 2012), we investigated the succession and dynamics of <10 µm phytoplankton. Water samples were collected from CTD rosette 10 L Niskin...