Pichavaram Mangrove Ecology Chidambaram Tamil Nadu

Pichavaram mangrove forest near Chidambaram in Cuddalore district, Tamil Nadu, is the second largest mangrove ecosystem in India (approximately 1,100 hectares) and one of the most ecologically significant, serving as a nursery habitat for commercially valuable fish and shrimp species of the Bay of Bengal coast and providing coastal protection documented during both the 2004 Indian Ocean tsunami and subsequent cyclones. The Pichavaram mangrove consists of 14 species of mangrove trees (Avicennia marina, Rhizophora mucronata, Excoecaria agallocha, Luminitzera racemosa and others), with the Rhizophora (red mangrove) species creating the characteristic aerial root network that stabilizes mudflat sediment, filters brackish water, and provides complex micro-habitat for fish, crustaceans, and migratory birds. The traditional Pichavaram fishing community (Pattinavar and Keezhnattu Chettiar communities) has fished the mangrove creek system using traditional canoe (padagu) and cast-net methods for centuries, with their traditional ecological knowledge identifying the seasonal movement of fish species through the mangrove channels, the role of specific tree species in providing shade and feeding substrate for juvenile fish, and the correlation between mangrove health and catch volume. Pichavaram mangroves showed 5-10 times lower wave damage in the 2004 tsunami compared to unprotected coastline immediately north and south of the forest, validating traditional community knowledge that mangroves protect coastal settlements. The Tamil Nadu Forest Department manages Pichavaram as a Reserved Forest with ecotourism regulation using traditional Pattinavar fishermen as licensed boat operators.