INVESTIGADORES
LARA Ruben Jose
artículos
Título:
Amazonian mangroves A multidisciplinary case study in Pará State, North Brazil
Autor/es:
LARA, RUBÉN JOSÉ
Revista:
WETLANDS ECOLOGY AND MANAGEMENT
Editorial:
Springer
Referencias:
Lugar: Amsterdam; Año: 2003 p. 217 - 221
ISSN:
0923-4861
Resumen:
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Prologue
It is always a pleasant but not always so easy task
to write an introduction -a short one- on the subject of Amazônia. The region
is so rich in nature and culture, history and myths, that the difficulty is to
keep these aspects completely separated from each other, as in any interdisciplinary
research. Fortunately, the layout of this edition has left a bit of extra space
in this introduction for, besides the numbers and facts, some etymology,
discovery voyages and old maps...
The
Present
The most
luxuriant mangrove habitats in Brazil
are found on the northern coast, which is part of a Large Marine Ecosystem (LME), extending from the Caribbean Sea
boundary, just off of Venezuela,
to the Paraiba River estuary. This LME owes its
existence largely to the North Brazil Current, which flows parallel to Brazils semi-arid North Coast
and is an extension of the South Equatorial Current coming from the East. It is
characterized by a wide shelf and features macrotides (4 to 10 m range), and
upwellings along the shelf edge. It has mangrove estuaries and the coastline is
primarily dominated by massive
freshwater areas and sediments inputs from the Amazon and Tocantins
rivers, as well as from the smaller rivers of the Amapa and western Pará (LME,
2002).
About 85% of
the Brazilian mangroves occur along 1800 km of the North Coast
in the States of Amapa, Pará and Maranhão, which together contain 10,713 km2
of these ecosystems. (Schaeffer-Novelli, 1990; Vannucci, 1999). The sector
between Belém (Pará) and São Luis
(Maranhão) represent 83% of the total mangrove area of these three Amazonian
states and is, with about 8,900 km2, the worlds largest unitary
mangrove system (Kjerfve and Lacerda, 1993). In this region, similar
geomorphologic features caused the development of analogous biological units with
common fauna and flora and similar patterns of resource exploitation
(Szlafsztein et al., 2000). This, and the fact that these mangroves are still
well conserved but under increasing anthropogenic pressure, facilitated the
selection of the study area for an integrated research approach initiated in
1996 in the frame of a Brazilian-German cooperation project on mangrove
dynamics and management (MADAM). In this special edition, a cross-section of
the different disciplines and approaches in this project is shown.
