Biodiversitas Journal of Biological Diversity
Vol. 21 No. 8 (2020)

Regeneration capacity and threats to mangrove areas on the southern coast of Oriental Mindoro, Philippines: Implications to mangrove ecosystem rehabilitation

AARON FROILAN RAGANAS (Department of Biological Sciences and Environmental Studies, College of Science and Mathematics, University of the Philippines Mindanao. Mintal, Davao City 8022, Philippines)
ANNALEE S. HADSALL (Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños. College, Laguna 4031, Philippines)
NELSON M. PAMPOLINA (Department of Forest Biological Sciences, College of Forestry and Natural Resources, University of the Philippines Los Baños. College, Laguna 4031, Philippines)
STEFAN HOTES (Chuo University. 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan)
DAMASA B. MAGCALE-MACANDOG (Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños. College, Laguna 4031, Philippines)



Article Info

Publish Date
21 Jul 2020

Abstract

Abstract. Raganas AFM, Hadsall AS, Pampolina NM, Hotes S, Magcale-Macandog DB. 2020. Regeneration capacity and threats to mangrove areas on the southern coast of Oriental Mindoro, Philippines: Implications to mangrove ecosystem rehabilitation. Biodiversitas 21: 3625-3636. Regeneration capacity is important as it determines the fate of an ecosystem. This study assessed six mangrove areas in the southern coast of Oriental Mindoro, Philippines to evaluate their regeneration capacity status. Four mangrove ecotypes were delineated namely seaward, middle, landward and riverine zones at each mangrove ecosystem, where dominant mangrove species were identified and selected for regeneration capacity study. Three subplots measuring 1 x 1 m2 were laid within the five 10 x 10 m2 survey plots established per zone. The juveniles were counted and categorized according to their height classes, using linear regeneration sampling method; where: RCI (?40 cm) considered seedlings; RCII (41-150 cm) as saplings; and RCIII (151-?300 cm) as small trees. Potential threats both anthropogenic and natural were determined through key informant interviews. Seven dominant species were identified across ecotypes in all mangrove sites, namely Avicennia marina, Avicennia rumphiana, Ceriops decandra, Rhizophora apiculata, Rhizophora mucronata, Sonneratia alba, and Xylocarpus granatum. RCI (seedlings) is the most abundant across mangrove sites irrespective of the dominant species. Fishpond operation within the mangrove stand is considered a major threat to the juveniles and most mangrove ecosystems. Therefore, protection and constant monitoring of these mangrove ecosystems are necessary to ensure regeneration success in the future.

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Journal Info

Abbrev

biodiv

Publisher

Subject

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

Description

The Biodiversitas Journal was first published in 2000 by the Department of Biology, FMNS, Universitas Sebelas Maret, Surakarta, Indonesia, then in 2006 it was co-published by the Society for Indonesian Biodiversity and that department; since 2017 it was also hosted by Smujo. From 2003-2012 it was ...