Richness, endemism and conservation status of woody plants in the lowland forest over limestone of Northern Sierra Madre Natural Park, Northeast Luzon, Philippines
Paper Details
Richness, endemism and conservation status of woody plants in the lowland forest over limestone of Northern Sierra Madre Natural Park, Northeast Luzon, Philippines
Abstract
The study was carried out to assess the woody species of the lowland forest over limestone in the Northern Sierra Madre Natural Park (NSMNP) in Palanan, Isabela, Northeast Luzon, Philippines in order to provide information of its floral diversity, endemism and conservation status. An updated species list was provided based on the recent field survey and analysis of herbarium records. A total of 138 woody species in 92 genera and 42 families were recorded consisting of three lianas, 34 shrubs and 101 small to large trees. The ten most speciose families were Meliaceae (13 spp.) Rubiaceae (8 spp.), Annonaceae (7 spp.), Ebenaceae (7 spp.), Fabaceae (7 spp.), Dipterocarpaceae (7 spp.), Myrtaceae (6 spp.), Primulaceae (5 spp.), Rutaceae (5 spp.), and Vitaceae (5 spp.). Genus Diospyros of the family Ebenaceae had the highest number of species (7) followed by genera Ficus (6), Shorea (5), Syzygium (5), and Leea (5). The most important species was Diospyros pyrrhocarpa Miq. Species endemism is very high, 41% (56) of the total number of species, nine (9) of which are single-island endemics known only to Luzon Island. Twenty-two (22) were threatened species, one being critically endangered, two are endangered, 15 are vulnerable and four are near threatened. The information provided is crucial in the management of the natural park, which requires serious monitoring and protection.
Co LL, LaFrankie JV, Lagunzad DA, Pasion KAC, Consunji HT, Bartolome NA, Yap SL, Molina JE, Tongco MDC, Ferreras UF, Davies SJ, Ashton PS. 2006. Forest Trees of Palanan, Philippines: A Study in Population Ecology. Center for Tropical Forest Science.
DENR Administrative Order. 2017. Updated National List of Threatened Philippine Plants and their Categories. DAO 2017-11.
Department of Environment and Natural Resources. 2006. Northern Sierra Madre Natural Park and outlying areas inclusive of the buffer zone. UNESCO World Heritage Centre.
Fernando ES. 1998. Vegetation of the Philippine Islands. UPLB College, Laguna.
Gentry AH. 1995. Diversity and floristic composition of Neotopical dry forests in S.H. Bullock, H.A. Mooney and E. Medina, eds. Seasonally dry tropical forests. Cambridge University Press, Cambridge.
Gillespie TW, Keppel G, Pau S, Price JP, Jaffré T, Meyer JY, O’Neill K. 2011. Floristic Composition and Natural History Characteristics of Dry Forests in the Pacific University of Hawai’i Press
Guingab MaVD, Welzen PCvan. 2018. Woody Flora of the Northern Sierra Madre Natural Park and Vicinity, Luzon, Philippines. ISU Publishing, Prints and Solutions.
IUCN (International Union for Conservation of Nature). 2017. The IUCN Red List of Threatened Species <www.iucnredlist.org>. Downloaded on 19 March 2018.
Lu XT, Yin JX, Tang JW. 2010. Structure, tree specie diversity and composition of tropical seasonal rainforest in Xishuangbanna South-West China. Journal of Tropical Forest Science 22(3), 260-270.
Naidu MT, Kumar OA. 2016. Tree diversity, stand structure, and community composition of tropical forests in Eastern Ghats of Andhra Pradesh, India. Journal of Asia-Pacific Biodiversity 9(3), 328-334.
Zhu H, Yong C, Zhou S, Wang H, Yan L. 2015. Vegetation, floristic composition and species diversity in a tropical mountain reserve in southern Yunnan, SW China with implications for conservation. Tropical Conservation Science.
MA. Visitacion, D. Guingab, 2019. Richness, endemism and conservation status of woody plants in the lowland forest over limestone of Northern Sierra Madre Natural Park, Northeast Luzon, Philippines. J. Biodiv. Environ. Sci., 14(5), 135-141.
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