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Post tsunami mangrove evaluation in coastal vicinity of Andaman Islands,India |
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| Authors: | Apurba Kumar Das Dilip Kumar Jha M Prashanthi Devi Biraja Kumar Sahu N V Vinithkumar R Kirubagaran |
| Institution: | 1. Andaman and Nicobar Centre for Ocean Science and Technology (ANCOST), Earth System Sciences Organisation (ESSO)-National Institute of Ocean Technology, Ministry of Earth Sciences, Govt. of India, Port Blair, 744103, India 2. Department of Environmental Management, School of Environmental Sciences, Bharathidasan University, Thiruchirapalli, India 3. Ocean Science and Technology for Islands, ESSO-National Institute of Ocean Technology Ministry of Earth Sciences, Govt. of India, Chennai, 600100, India |
| Abstract: | The present study was carried out to determine the mangrove area water quality, mangrove diversity and density at Minnie Bay, Lalaji Bay and Aerial Bay (Andaman Islands, India). The physicochemical parameters such as salinity, nitrate, inorganic phosphate and total phosphorus varied significantly. Mangrove diversity was high at Minnie Bay while density at Aerial Bay. Rhizophora mucronata dominated at all three sites during the study period. Shannon-Wiener diversity index (H′?=?2.261) and Pielou’s evenness (J′?=?0.8348) were high at Minnie Bay. The higher species density cover (5.679 Nos./m2) was recorded at Aerial Bay. Bray-Curtis cluster analysis showed 63.35 % similarity and formed two clusters. Though uplift and subsidence of coastal land due to the Mw 9.3 Sumatra earthquake in 2004 has affected the mangrove vegetation, its rejuvenation was observed in the newly formed inter-tidal areas due to changes in coastal geomorphology. The comparative study on physicochemical parameters, mangrove coverage and conservation are discussed in detail. |
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