Schwerpunktprogramm (SPP) 1158: Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Bereich Infrastruktur - Antarktisforschung mit vergleichenden Untersuchungen in arktischen Eisgebieten, The influence of Fe on the distribution and kinetic speciation of Zn, Cd, Co and Ni in the Southern Ocean

Description: The role of Fe as the key limiting nutrient for the growth of phytoplankton in the high-nitrate-low-chlorophyll (HNLC) waters of the Southern Ocean is now without question after a series of mesoscale Fe enrichment experiments conducted there over the last few years. Through its influence on phytoplankton physiology changes in Fe have an effect on the biological demand and the distribution of other nutrients. Some of the other key bio-elements have the potential to co-limit the growth of plankton species and in turn influence the phytoplankton community structure and the drawdown of macronutrients. In this context the trace metals Zn, Cd, Co and Ni are needed for the uptake and metabolisation of the macronutrients N, Si, C and P (Figure 1) and have been identified as prime candidates for further studies. While Zn, Co and Ni are important cofactors in various enzymes the role of Cd is ambivalent as it is toxic in relatively low concentrations. However recently it could be shown that a variety of marine diatoms have the ability to use Cd as a substitute for Zn in isoforms of the Carbonic Anhydrase. Furthermore a deepened knowledge regarding the biogeochemistry of Zn and Cd is fundamental to establish their use as paleo-tracers for carbon-export (Zn) and primary productivity (Cd).

SupportProgram

Origins: /Bund/UBA/UFORDAT

Tags: Chlorophyll ? Kobalt ? Nickel ? Eisen ? Arktisches Meereis ? Biochemie ? Cadmium ? Geochemie ? Kohlenstoff ? Nährstoff ? Phosphor ? Physiologie ? Phytoplankton ? Silizium ? Stickstoff ? Tracer ? Zink ? Metall ? Plankton ? Nährstoffkreislauf ? Studie ? Toxizität ? Bewässerung ? Meeresgewässer ? Antarktisforschung ? Produktivität ? Stoffwechsel ? Anreicherung ? Gewässer ? Südlicher Ozean ? Enzym ? Speziation [Chemie] ? Wachstum [biologisch] ? Art [Spezies] ? Primärproduktion ?

Region: Schleswig-Holstein

Bounding boxes: 9.75° .. 9.75° x 54.2° .. 54.2°

License: cc-by-nc-nd/4.0

Language: Englisch/English

Organisations

• Deutsche Forschungsgemeinschaft (Finanzielle Förderung)
• Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR), Forschungsbereich 2: Marine Biogeochemie, Forschungseinheit Chemische Ozeanographie (Betrieb)
• Umweltbundesamt (Bereitstellung)

Time ranges: 2007-07-01 - 2009-06-30

Resources

• Webseite zum Förderprojekt

  http://www.spp-antarktisforschung.de/ (Webseite)

Status

Aktiv

Quality score

• Overall: 0.47
• Findability: 0.56

  • Title: 0.09
  • Description: 0.44
  • Identifier: false
  • Keywords: 0.86
  • Spatial: RegionIdentified (1.00)
  • Temporal: true
• Accessibility: 0.67

  • Landing page: Specific (1.00)
  • Direct access: false
  • Publicly accessible: true
• Interoperability: 0.00

  • Open file format: false
  • Media type: false
  • Machine-readable metadata: false
  • Machine-readable data: false
• Reusability: 0.67

  • License: ClearlySpecifiedAndFree (1.00)
  • Contact info: false
  • Publisher info: true

Accessed 1 times.