ESR/PhD position in the project "Assessing current and past reef accretion rates in turbid reefs off Makassar (Sulawesi, Indonesia)"

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Deadline 1 octobre 2019

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Organisation: Naturalis Biodiversity Center

Natural and anthropogenic drivers are likely to drive large-scale changes in the distribution of calcifying organisms in turbid coral reefs. Turbid reefs are characterised by low availability of light for photosynthesis and the presence of corals, sponges and algae as the dominant structural components. The depth window where these reefs are thriving hinders direct and extensive observation and mapping through conventional SCUBA diving. Therefore, little is known of deeper reef distribution. Knowledge on deeper parts of the reef, however, is a crucial aspect to understand what neritic shelf carbonates may look like in a world subjected to climate change.

Objectives of the individual project

  • Gain expertise with the tools needed to quantify the carbonate production in the modern reef system at large, i.e. including reefs and inter-reef sea floor, for example, portable multibeam system, multichannel sparker seismics, high-resolution single channel seismics, and targeted visual sea-floor observation.
  • Relate (changes in) reef geomorphology to environmental change. Specific question: What are the implications of loss of coral cover on the morphology of the reef and the distribution of calcifying organisms.
  • Quantify the chronostratigraphic framework of the reef cores. Specific question: what is the main driver of accumulation rates?
  • Place these findings into context of current and past climate change.