International Science Community Association International Research Journal of Biological Sciences 2278 - 3202 5 12 2016 12 10 Surveillance of the Tolerance Limit of Sonneratia alba Sm. to certain Hydrogeochemical Parameters from Heterogenous Natural Habitats of Kerala, South India 28 37 EN N.M. Aka 1 Oceanological Research Center (Abidjan, Côte d’Ivoire), BPV 18, Abidjan R.N. Etilé 2 Hydrobiology Laboratory, UFR Biosciences, University Félix HOUPHOUËT-BOIGNY (Côte d’Ivoire), 22 BP 582 Abidjan, Côte d’Ivoire F.K. Konan 3 Department of Environment, University Jean Lorougnon Guédé, BP 150 Daloa, Côte d’Ivoire Y.K. Bony 4 Department of Environment, University Jean Lorougnon Guédé, BP 150 Daloa, Côte d’Ivoire Melaku Yadessa 1 Program of Chemistry, Adama Science and Technology University, Adama, Ethiopia Duguma Tolessa 2 Program of Chemistry, Adama Science and Technology University, Adama, Ethiopia Khamtilin Kharshiing 1 Department of Zoology, Lady Keane College, Shillong-793 001, India Gupta B.B.P. 2 Environmental Endocrinology Laboratory, Department of Zoology, North-Eastern Hill University, Shillong – 793 022, India S. Dessoky El dessoky 1 Biotechnology and Genetic Engineering Research Unit, Scientific Research Center, Taif University, Taif, Al-Haweiah, P.O. Box 888, Zip code 21974, Taif, KSA O. Attia Attia 2 Agricultural Genetic Engineering Research Institute, Agricultural Research Center, P.O. Box, 12619, Giza, Egypt G. Pillai Neethu 1 Division of Environmental Science, Department of Botany, University of Calicut, Malappuram District, Kerala - 673635, India C.C. Harilal 2 Division of Environmental Science, Department of Botany, University of Calicut, Malappuram District, Kerala - 673635, India > Research Paper 2016 11 12 2016 12 10 Efforts for the restoration of mangroves entail unswerving information on their growth sustaining conditions. Present study attempts to assess the tolerance of Sonneratia alba, the mangrove apple, grown in diverse natural conditions in the coastal environments of Kerala, to varied ranges of water quality parameters influencing their growth and establishment. Such information is appropriate in finding out regions which are ideal for their introduction in pursuit of coastal conservation and management. The year round study indicated a marked difference in all water quality parameters in their habitats, with respect to seasons. The range of tolerance of imperative water quality parameters like salinity (ppt) during pre-monsoon, monsoon and post monsoon seasons was noted to be 33.93 – 38.5, 0.299 – 11.68 and 7.107 – 35.15 respectively. Similarly the ranges of Hardness (6840 - 8760, 32 - 520 and 280 – 6800 mg/l), Calcium (448.56 – 528.66, 1363.4 – 1830.86, 9.62 – 134.67 mg/l), Magnesium (1.46 – 44.79, 84.17 – 488.61, 8.28 – 1397.49 mg/l), Sodium (23.9 – 29.8, 0.002 – 8.17, 5.33 – 31.1ppt) and Potassium (0 – 1.65, 0 – 0.26, 0.12 – 2.56 ppt) were analysed and reported. Correlation of these vital hydrogeochemical parameters from diverse sampling stations proved that the changing trends in related parameters are coherent and all the three sampling stations are highly unswerving and persuasive. More over wide range of tolerance of S. alba to salinity (0.299 to 38.5 ppt) is indicative of their potentialities for inclusion in various coastal restoration activities. Copyright@ International Science Community Association