Mollusk Species Diversity in Mangrove Ecosystems of Northern Samar: Basis in the Design of Mangrove Rehabilitation Programs

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Lina B. Pepito
Tito M. Cabili


This study was conducted to assess the mollusks species diversity in the mangrove ecosystems of Northern Samar which included coastline of the University of Eastern Philippines (Study Site I), Brgy. Langob, Laoang, Northern Samar (Study Site II), Sitio Bel-at, Brgy Progress, Biri, Northern Samar (Study Site III) and Lalaguna Mangrove Protected Area in San Isidro, Lavezares, Northern Samar (Study Site IV).  In the four (4) study sites, a comprehensive survey revealed the presence of ten (10) distinct mangrove species, which were classified into five (5) diverse families. A remarkable total of 343 individual mangroves were recorded during the study. Forty-nine (49) mollusk species were identified belonging to 17 different families of Class Gastropoda, six (6) families of Class Bivalvia and one (1) of Class Polyplacophora with a total of 935 individuals of mollusks. Shannon diversity indices showed that mangrove species in study site II had a greater diversity index of 1.7109 compared to the other sites that have lesser diversity.   Simpson’s species dominance should the highest value of 0.4425 in study site IV.  Based also on the Shannon diversity indices, the mollusk highest number of individual species of 2.6341 (29 species) was in study site I which is considered low diversity.   The Simpson’s species dominance had the highest value of 0.3349 in study site II, while the species richness had the highest value of 1.773 in study sites III and IV, and species evenness had the highest value of   0.7823 in study site I.  Mangrove rehabilitation/restoration program could therefore be implemented by the local government units in Northern Samar and the University of Eastern Philippines.

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Pepito, L. B. ., & Cabili, T. M. . (2023). Mollusk Species Diversity in Mangrove Ecosystems of Northern Samar: Basis in the Design of Mangrove Rehabilitation Programs. Journal of Coastal Life Medicine, 11(2), 750 –. Retrieved from


Amsel, S. (2019). “Phylum – mollusca (gastropods, bivalves, cephalopods)” Exploring nature educational resources ©2005-2019. Retrieved from on July 2019

Asuk, S.A., Offiong, E.E., Ifebuena, N.M, and Akpaso, E.O., (2018). “Species composition and diversity of mangroves swamps forest in Southern Nigeria”. International Journal of Avian & Wildlife Biology. EISSN: 2574-9862, 3(2):159-164

Benkendorff, K. (2010). “Molluscan biological and chemical diversity: secondary metabolites and medicinal resources produced by marine mollusk”. Biological Reviews © 2010 Cambrige Philosophical Society. PMID: 20105155 (Indexed for MedLine).

Cardillo, J. and Novero, A. (2018). “Assessment of mangrove diversity in Santa Cruz, Davao Del Sur, Philippines.” Journal of Biodiversity and Environmental Science (JBES), ISSN:2220-6663 (Print) 2222-3045 (Online) 14 (2): 53-62, Retrieved from (Open Access) on June 2019

Dale, P.E.R., Knight, J.M. and Dwyer, P.M., (2014). Mangrove rehabilitation: a review focus on ecological and institutional issues. Wetlands Ecol Manage, 22:587-604. Retrieved from on June 2019

De Vera, R.B., I.A De Vera and R.Dela Peña. (2015). “Mollusks in the mangrove rehabilitation areas in Western Pangasinan, Philippines.” Asia Pacific Journal of Multidisciplinary Research, 3(5): 110-115. Retrieved from on June 2019

Dewiyanti,I. and K. Sofyatuddin. 2011. “Diversity of gastropods and bivalves in mangrove ecosystem rehabilitation areas in Aceh Besar and Banda Aceh districts, Indonesia.” Aquaculture, Aquarium, Conservation and Legislation International Journal of the Bioflux Society, Open Access Research Article. 5 (2): 55-59. AACL Bioflux. Retrieved from on September 2019

Dolorosa, R.G. and F.D. Galon. (2014). “Species richness of bivalves and gastropods in Iwahig River-Estuary, Palawan, Philippines”. International Journal of Fisheries and Aquatic Studies 2(1):207-215

English, S., Wilkinson C., Baker, V. (1997). Survey manual for tropical marine resources, Chapter 3 Mangrove Survey, 119-196. Townsville: Autralian Institute of Marine Science

Kottè-Mapoko,E.F., V.M. Ngo-Massou, L. G. Essomè-Koum1, J. M. Emane, L.N. Moussian, R.Tchoffo, N.Din. (2017). “Molluscs’ composition and distribution in mangroves of the Cameroon Central Coast”. International Journal of Research Studies in Biosciences (IJRSB) V.5, N. 5, 4-13 ISSN 2349-0357 (Print) & ISSN 2349-0365 Retrieved from on June 2019

Fernanddo, E.S. (1998). Forest formation and flora of the Philippines: Handouts in FBS 21. College of Forestry and Natural Resources, University of the Philippines at Los Baños (Unpublished)

Fortes, M.D. and S. Salmo III. (2015). “Status of mangrove research and management in the Philippines: Challenges and opportunities”. State of the Mangrove Summit: Northwestern Luzon Proceedings. DOI: Retrieved from September 2019

Galenzoga, D.M. (2016). “Community structure of molluscs in Northern Samar, Philippines”. International Journal of Life Sciences Research ISSN 2348-3148 (online) 4(1):100-104, Retrieved from June 2019

Garcia, et al. (2014). Philippines’ mangroves ecosystem: Status, threats and conservation. ©Springer Science+ Business Media (

Kabir, M., M. Abolfathi, A.Hajimoradloo, S.Zahedi, K.Kathiresan, and S. Goli. (2014). “Effect of mangroves in the distribution, diversity an abundance of mollucs in mangrove ecosystem: a Review”. AACL Bioflux. 7(4):286-300. Retrieved from on June 2019

Kotte-Mapoko, E.F.K., Ngo-Massou, V.M., Essome-Koum, L.G., Emane, J.M., Moussian, L.N. Tchoffo, R. and Ndongo,D. (2017). “Molluscs composition and distribution in mangroves of the Cameroon Central Coast.” International Journal of Research Studies in Biosciences. V.5 (5): 4-13. Retrieved from on July 2019

K. Sakthivel, P. Thirunavukkarasu, K. Kathiresan. (2014). “Mangroves and associates in the estuaries of Tamil Nadu Coast of India”. International Journal of Marine Science, 4(58): 1-7. Retrieved from on September 2019

Mader, S.S. and M. Windelspecht, with contribution by A.Cognato, D. Cox, J. Isaacson and I.Quitadamo. (2010). Biology 11th edition. New York: McGraw Hill Education

Masagca, J.T., A.V. Mendoza and E.T. Tribiana. (2010). “The status of mollusk diversity and physical setting of the mangrove zones in Catanduanes Island, Luzon, Philippines.” Journal of Biotropia, 17(2): 62-76

Medrano, B.L. (2011). “Species diversity of mangroves in Catarman, Northern Samar.” Unpublished Thesis, University of Eastern Philippines, Catarman, Northern Samar

Morallos, S.A. (2019). “Species diversity of mangroves in Northern Samar”. Unpublished Masteral Thesis, University of Eastern Philippines, Catarman, Northern Samar

Norcio, C.U. and A.A.U. Flores, Jr. (2019). “Marine gastropods and bivalves of Biri, Northern Samar.” J.Bio.Innov, 8(3): 319-329, |ISSN 2277-8330. Retrieved from on September 2019

Primavera, J. H., R.S.Sadaba, M.J.H.L. Lebata, and J.P. Altamirano, (2004). Handbook of Mangroves in the Philippines-Panay. Southeast Asian Fisheries Development Center Aquaculture Department, Iloilo, Philippines, pp. 106

Ramos, D.A.E., G.A. Batomalaque and J.A.Anticamara (2018). “Current status of Philippine mollusk meseum collections and research, and their implications on biodiversity science and conservation”. Philippine Journal of Science. 147(1): 123-163. Retrieved from on September 2019

Salmo, S.G. III, D.D. Torio and J.M.A. Esteban (2007). “Evaluation of rehabilitation strategies and management schemes for the improved of mangrove management programs in Lingayen Gulf.” Science Diliman Journal, 19(1): 24-34. Retrieved from on September 2019

Zvonareva,S. and K.Yuri. (2016). Checklists of gastropod molluscs in mangroves of Khanh Hoa province, Vietnam. ISSN 1175-5334 (online edition) Magnolia Press Zootaxa 4162 (3): 401–437 Retrieved from on December 2019

Systems Theories. Retrieved December, 2019 from

Yadav, R., Malla, PK., Dash, D., Bhoi, G. (2019). “Diversity of gastropods and bivalves in the mangrove ecosystem of Paradeep, east coast of India: a comparative study with other Indian mangrove ecosystems” Published online: 01 Aug 2019, Pages 325-332,