The impact of shrimp farming on the diversity of mangroves leading to build sustainable aquaculture models in Puttalam Lagoon, Sri Lanka
Wetlands consist of mangroves are the prime areas for aquaculture, particularly shrimp farming. Hence, the study was aimed to ascertain the impact of shrimp farming on the diversity of mangrove species in Puttalam lagoon to build models for sustainable aquaculture. Using various data collection methods the mangrove diversity and shrimp cultivation assessed. The mangrove cover has been reduced into a patchy distribution where the active shrimp ponds were significant. Particular floral composition identified among shrimp pond areas including rare and very rare mangrove species. Diversity hotspots were identified within the abandoned shrimp pond areas indicating natural succession act as a passive approach. Salt pans and crab fattening also identified as an increasing threat on the diversity of mangrove species. Pilot methods applied to restore and conserve were shown positive effects. Thus, is timely important to restore abandoned shrimp ponds to rejuvenate the species diversity of mangroves.