Abstract
Abstract Over more than twenty years research in stable regions of tropical and subtropical Atlantic as well as in tectonically active regions of the Eastern Mediterranean coast, we have made use of biological sea-level indicators (Bio sli) of past sea-levels. The latter include rock-building species (vermetid gastropods, coralline algae and corals), as well as smaller fixed invertebrates, whose frail skeletons are preserved in case of a rapid uplift, but rarely in case of a slow elevation or submersion. Reef-building Bio sli are adapted to the detection of slow relative movements (tectonic or eustatic) whereas frail species allow a reconstitution of rapid, co-seismic elevations or complex up and down movements. The composition of a recent fossil fauna along a tropical coast may present some differences with that of fauna presently living along the same shore. Such differences can sometimes be interpreted as being of climatic origin. In regions subjected to rapid climatic variations, a periodical survey of the repartition of a number of species may help detecting rapid climatic variations.
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