The mapping of the Posidonia oceanica (L.) Delile barrier reef meadow in the southeastern Gulf of Tunis (Tunisia)
Résumé
Barrier reefs are among the most important ecomorphosis for Posidonia oceanica meadows and have long
been subjected to anthropic pressures. The authors mapped the entire Sidi Rais (northeastern Tunisia)
Posidonia oceanica barrier reef by means of remote sensing based on processing a satellite image acquired
via Google Earth © software, coupled with field observations obtained by snorkeling. The map thus
produced represents the P. oceanica barrier reef in its current state, covering a total area of 156.77 ha, the
reef being divided into three distinct sections separated by reverse flows with each section subject to
varied anthropic factors and disturbances.