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Vascular Plant Species Inventory of a Philippine Lowland Rain Forest and its Conservation Value

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Abstract

The Philippines are one of the most important biodiveristy hotspots on earth. Due to the extraordinary rate of environmental destruction, leaving only 3% of the land with primary forest, this biodiversity is at high risk. Despite that situation information on Philippine forest vegetation is fragmentary and focused on trees. This study aimed at analysing forest remnants in the Leyte Cordillera on the Island of Leyte, and at evaluating their role as refuge to the largely destroyed lowland forest vegetation. A total of 49 plots (100 m2 each) between 55 and 520 m a.s.l. were studied. All vascular plant species except epiphytes were included. Records include 685 taxa from 289 genera and 111 families, representing nearly 8% of the known Philippine vascular plant species. More than half (52%) of the species are Philippine endemics. A number of 41 tree species, or 6% of all taxa recorded, are included in the IUCN red list, either as vulnerable, endangered, or critically endangered. Life form composition was dominated by phanerophytes (65.3%), followed by lianas and chamaephytes (17.1 and 16.9%, respectively). The most common families were the Rubiaceae with 35 and the Euphorbiaceae with 32 species. All five Philippine dipterocarp forest types as well as the molave forest type were represented by typical tree species. The area provides an important gene bank of the highly threatened Philippine lowland forest vegetation and is of high value for biodiversity conservation. Additionally, it can play an important role as seed source of valuable tree species for the increasing initiatives to rehabilitate and reforest degraded land with native species.

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  1. Institute of Plant Production and Agroecology in the Tropics and Subtropics (380), Agroecology Section, University of Hohenheim, 70593 , Stuttgart, Germany

    Gerhard Langenberger, Konrad Martin & Joachim Sauerborn

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  1. Gerhard Langenberger
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  2. Konrad Martin
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Langenberger, G., Martin, K. & Sauerborn, J. Vascular Plant Species Inventory of a Philippine Lowland Rain Forest and its Conservation Value. Biodivers Conserv 15, 1271–1301 (2006). https://doi.org/10.1007/s10531-005-2576-4

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