HOLOCENE SEA LEVELS AND PALAEOENVIRONMENTS, SOUTHEAST SULAWESI, INDONESIA: APPLICATION OF MANGROVE PALYNOLOGY AND THE TRANSFER FUNCTION APPROACH
We have developed a microfossil transfer function to reconstruct former sea level. We have collected contemporary pollen samples from three mangrove transects in Southeast Sulawesi, Indonesia. The Family Rhizophoraceae and particularly the genus Rhizophora dominate the mangroves of S.E. Sulawesi in line with previous studies from Southeast Asia and Northern Australia. 16 mangrove pollen species were identified within the contemporary samples. The transfer function demonstrates that reconstructions using this dataset can achieve predictions accurate to ± 11 cm.
Sea-level observations from Southeast Sulawesi reveal an upward trend of Holocene relative sea level from a minimum of -4.85m 7300 cal yrs BP to the present elevation. Relative sea-level rises rapidly; greater than 1.7 m between 7300 6750 cal yrs BP with a further 1.5m rise between 6750 and 4650 cal yrs BP. Thereafter, sea level continues to rise at a steady but reduced rate (equivalent to 0.37mmyr-1). Relative sea-level never rises above present.