BWZee
A Biological Valuation Map for the Belgian Continental Shelf
partner expert enduser contact
 
homeobjectivesbackgroundactivitiesatlasvaluationmeta-datapartnersendusers
BWZee Metadata Database
List all

By choosing an item from the pick list, you can list all the projects, persons, institutes, conferences and literature in the database relevant to the BWZee project.

  
[ report an error in this record ]basket (0): add | show Print this page
Environmental constraints on Holocene cold-water coral reef growth off Norway: insights from a multiproxy approach
Raddatz, J.; Liebetrau, V.; Trotter, J.; Rüggeberg, A.; Flögel, S.; Dullo, W.-C.; Eisenhauer, A.; Voigt, S.; McCulloch, M. (2016). Environmental constraints on Holocene cold-water coral reef growth off Norway: insights from a multiproxy approach. Paleoceanography 31(10): 1350-1367. https://dx.doi.org/10.1002/2016PA002974
In: Paleoceanography. American Geophysical Union: Washington, DC. ISSN 0883-8305; e-ISSN 1944-9186
Peer reviewed article  
Available in  Authors 
Keywords
    Desmophyllum pertusum (Linnaeus, 1758) [WoRMS]
    Marine/Coastal
Author keywords
    cold-water corals; Lophelia pertusa; boron isotopes; Holocene; pHupregulation; Li; Mg
Authors  Top 
  • Raddatz, J.
  • Liebetrau, V.
  • Trotter, J.
  • Rüggeberg, A.
  • Flögel, S.
  • Dullo, W.-C.
  • Eisenhauer, A.
  • Voigt, S.
  • McCulloch, M.
Abstract
    High-latitude cold-water coral (CWC) reefs are particularly susceptible due to enhanced CO2 uptake in these regions. Using precisely dated (U/Th) CWCs (Lophelia pertusa) retrieved during research cruise POS 391 (Lopphavet 70.6°N, Oslofjord 59°N) we applied boron isotopes (δ11B), Ba/Ca, Li/Mg, and U/Ca ratios to reconstruct the environmental boundary conditions of CWC reef growth. The sedimentary record from these CWC reefs reveals a lack of corals between ~6.4 and 4.8 ka. The question remains if this phenomenon is related to changes in the carbonate system or other causes. The initial postglacial setting had elevated Ba/Ca ratios, indicative of meltwater fluxes showing a decreasing trend toward cessation at 6.4 ka with an oscillation pattern similar to continental glacier fluctuations. Downcore U/Ca ratios reveal an increasing trend, which is outside the range of modern U/Ca variability in L. pertusa, suggesting changes of seawater pH near 6.4 ka. The reconstructed bottom water temperature at Lopphavet reveals a striking similarity to Barent sea surface and subsea surface temperature records. We infer that meltwater pulses weakened the North Atlantic Current system, resulting in southward advances of cold and CO2-rich Arctic waters. A corresponding shift in the δ11B record from ~25.0‰ to ~27.0‰ probably implies enhanced pH up-regulation of the CWCs due to the higher pCO2 concentrations of ambient seawater, which hastened mid-Holocene CWC reef decline on the Norwegian margin.
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors