LARA Ruben Jose
capítulos de libros
BEHLING, H.; COHEN, M.C.L.; LARA, R.J.; VEDEL, V.
Mangrove Dynamics and Management in North Brazil. Ecological Studies,
Lugar: Berlin; Año: 2010; p. 35 - 43
The structure of coastal habitats is strongly influenced by inundation frequency andtopographic characteristics, which determine the configuration and dynamic ofcoastal vegetation including mangrove ecosystems in the tropics. Therefore, mangroveecosystems and other wetlands are highly susceptible to relative sea-level(RSL) fluctuations (Gornitz 1991). The sediments deposited beneath mangrovevegetation provide useful indications of past sea-levels (Scholl 1964; Woodroffe1981; van de Plassche 1986), since the development of mangroves is controlled byland?ocean interaction (Woodroffe 1982).One of the most significant agents of environmental transformation followingclimatic change is the RSL change. Several studies, developed along the easternand southern Brazilian coast, have suggested RSL changes during the Holocene(Suguio et al. 1985; Martin et al. 1988; Tomazelli 1990; Angulo et al. 1999). Inorder to understand past environmental changes in Amazonia, such as the naturalamplitude of Amazonian ecosystem dynamics, including coastal ecosystems suchas mangroves, as well as Amazonian climate changes, palaeoecological andpalaeoenvironmental studies are important. Several lacustrine and mangrove sedimentdeposits have been studied by pollen analysis. The aim of this Chapter is tocompare and summarize recent published pollen records and to give an overview ofnatural environmental changes in the coastal Amazon Basin region, related to theimpact of the Holocene sea-level changes.