Diatoms from Indonesian mangroves and their suitability as sea-level indicators for tropical environments

TitleDiatoms from Indonesian mangroves and their suitability as sea-level indicators for tropical environments
Publication TypeJournal Article
Year of Publication2007
AuthorsHorton BP, Zong Y, Hillier C, Engelhart SE
JournalMarine Micropaleontology
Volume63
Issue3-4
Pagination155=168
Date Published06/2007
Abstract

We collected modern diatom samples from two mangrove environments of Sulawesi, Indonesia to provide a much needed dataset for the reconstruction of sea level from tropical environments. The diatom assemblages are dominated by mesohalobous species (e.g.Amphora coffeaeformisAmphora turgidaAchnanthes delicatulaNitzschia sigma andTryblionella balatonis) and oligohalobous (e.g. Amphora venetaDiploneis ovalis andProgonoia didiomatia) taxa. Both study sites show strong vertical zonations, which suggests that duration and frequency of intertidal exposure are important factors in controlling the relative abundance of diatoms. The assemblages can be generally divided into a mixed assemblage of mesohalobous, oligohalobous–halophilous and oligohalobous-indifferent diatoms that are found from the dense mangrove vegetation towards the landward edge of the transects, and mesohalobous diatom assemblages that are located within the fringingRhizophora and tidal flat environments. We subsequently developed a diatom-based transfer function, which is a quantitative approach to sea-level reconstruction. The relationship between observed and diatom-predicted elevations suggests accurate and precise reconstructions are possible. The error estimate (± 0.15 m) is comparable to diatom-based transfer functions from temperate marshes.

 
URLhttp://www.sciencedirect.com/science/article/pii/S0377839806001757
DOI10.1016/j.marmicro.2006.11.005