In coastal area interactions among air, water and soil take place. The
nature of water and amplitude of the tidal regimes resulted in the poor
understanding.The present study focused on a segment of the coastal zone
of Bangladesh. Soils collected from the three islands were found to be
rather similar as regard to chemical properties, although some variables
differed significantly among the islands. No general pattern of
significant variation was found location wise. Element concentrations of
leaves of Sonneratia apetala showed significant variations among the
islands. In most cases, location 2 of the river Buragauranga had higher
values of the variables. Among the phytoplankton genera, 8 belong to
class Bacillaiophyceae. Dominant phytoplankton was Trachelomonas sp. and
was found in all three locations. Phytoplankton diversity was high in
location 2. Principal component analysis (PCA) showed that Trachelomonas
sp. has negative significant correlation with principal component one
but have positive relation with Coscinodiscus sp. This book will help in
understanding the coastal zone as holistic approaches have been taken
and help in conservation and management of coastal resources.