Landscapes Forest and Global Change - ESA - Escola Superior ...

E. Kouhgardi et al. 2010. Values of mangroves and its interaction with marine ecosystem
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though a ratio of 20:80 is suggested for ponds to mangroves, on 25 ha allocations as "woodlot
silvo-fishery" (Choudhury 1996). It is suggested that the mangrove area that may be sacrificed
for fish ponds, can be calculated by using the following formula (Llaurado and Lindquist 1982).
The Max. Area that can be brought under Aquaculture = (S-F) / 2S
where:
S= Value of fish yield per hectare
F= Value of forestry per hectare, which must include the linkage values such contribution
to open fishing, near-shore fishing, erosion control, biodiversity value, eco-tourism,
shelterbelt value, etc.
This formula seems to be too simple and is based completely on monetary aspects.
Ecological restoration of mangrove habitat is feasible, has been done on a large scale in various
parts of the world, and can be done cost-effectively. The simple application of the five steps to
successful mangrove restoration described here would at least ensure an analytical thought
process and less use of “gardening” of mangroves as the solution to all mangrove restoration
problems. At appropriate sites with normal or near-normal tidal hydrology and with
establishment of mangroves through natural recruitment or planting, restored mangrove systems
can become indistinguishable from nearby natural mangrove systems within a short time. So in
view point of these various use and benefits for human and marine ecosystem, conservation of
mangrove forests would be a main strategy in the area.
References
Acosta, A., 1997. Use of multi-mesh gillnets and trammel nets to estimate fish species
composition in coral reef and mangroves in the southwest coast of Puerto Rico. Caribb
Sciences, 33:45–57.
Alongi, D., 2002. Present state and future of the world’s mangrove forests. Environmental
Conservation, 29:331–349.
He, B., Fan, H., and Mo, Z., 2001. Study on species diversity of fishes in mangrove area of
Yingluo Bay, Guangxi province. Tropical Oceanography, 20:74–79.
Pittman, S., McAlpine, C., and Pittman, K., 2004. Linking fish and prawns to their environment:
a hierarchical landscape approach. Marin Ecology, 283:233–254.
Sheaves, M., 2005. Nature and consequences of biological connectivity in mangrove systems.
Marin Ecology, 302: 293–305.
Forest Landscapes and Global Change-New Frontiers in Management, Conservation and Restoration. Proceedings of the IUFRO Landscape Ecology
Working Group International Conference, September 21-27, 2010, Bragança, Portugal. J.C. Azevedo, M. Feliciano, J. Castro & M.A. Pinto (eds.)
2010, Instituto Politécnico de Bragança, Bragança, Portugal.