||Pollen analysis of three core samples,YEV-I, GOHO.00 and DO.00, taken in the coastal area of Bénin shows
the existence of mangrove during the Holocene. This mangrove underwent many physiognomic changes
from the middle to the late Holocene. In the course of the middle Holocene (from 7500 to 2500 years
before present (BP)), it stretched over a large area from the littoral inland. It was tightly closed and almost
monospecific, dominated by Rhizophora. During the late Holocene, this mangrove started to regress
around 3000 years BP and disappeared about 2500 years BP from the studied sites. It has been replaced
by swamp meadows dominated by Paspalum vaginatum Sw. and a fresh water environment colonised by
taxa such as Persicaria, Typha, Ludwigia, and Nymphaea.