Tree diversity in Asia's tropical and subtropical forests is central to nature-based solutions. Species vulnerability to multiple threats, which affect provision of ecosystem services, is poorly understood. We conducted a region-wide, spatially explicit assessment of the
Java is the most populous island in the world. This high population and the extensive economic activities have significantly reduced the forest areas of the Island and have greatly increased the pressure on its plant diversity. Compared to those with a wide distribution, endemic plants with a narrow geographic range are more vulnerable to anthropogenic threats and environmental changes. As species lists are essential for knowledge of species diversity in areas with strong anthropogenic pressure, here we present a dataset of endemic plants of Java Island. The initial species list was manually extracted from the Plant of the World Online (POWO). Each species on the list was then confirmed for its endemism by checking its current distribution using peer-reviewed publications, online plant databases and herbarium specimen images stored on the Global Biodiversity Information Facility (GBIF). The dataset contains 652 species in 279 genera and 85 families. The family with the highest number of endemic species is Orchidaceae (142 species), followed by Rubiaceae (57 species), Acanthaceae (40 species), Apocynaceae (35 species) and Lauraceae (29 species). The growth form of the species is mostly trees (22.6%), followed by herbs (19.2%), epiphytes (16%), shrubs (12.4%), vines (11%) and geophytes (9.4%). Most of the species (89.7%) have not yet been assessed for their conservation status according to the IUCN Red List Categories and Criteria. There are only 55 species (8.3%) that have been conserved within ex situ collections. Furthermore, most of the species (79.8%) are not listed on the CITES appendices and there are only four species (0.6%) protected by national law. Our contribution provides the first online list of accepted scientific names of Javan endemic plants species, together with all their synonyms. New to the dataset are: i) provision of local names of the species (if available), ii) the classification of species under eleven growth forms (tree, shrub, herb, annual, graminoid, geophyte, fern, vines, hydrophyte, parasite and epiphyte), iii) assignation of the extinction risk of species according to the IUCN Red List, iv) ex situ collection status of species and information on the protection status of the species according to (v) CITES and (vi) the national law of Indonesia.
Robiansyah I, Dodo, Hamidi A. 2019. Population status of endemic tree kokoleceran (Vatica bantamensis) in Ujung Kulon National Park, Indonesia. Biodiversitas 20: 296-302. Kokoleceran (Vatica bantamensis) is an endemic tree found only in Ujung Kulon National Park (UKNP), Banten, Indonesia, and is classified as Endangered by IUCN Red List. To develop effective conservation measures of threatened plants, current information on population status and distribution of the species is needed. Thus in the present study, a targeted survey of kokoleceran was conducted in UKNP aiming at mapping the distribution of the species, measuring current population size and structure, assessing the habitat preferences, and identifying threats to the species. Using a non-random adaptive cluster sampling, a total of 27 clusters harboring 280 individuals of kokoleceran was located, of which 20 % were in mature stage. All these individuals were only found in Mount Payung and its surrounding areas, and formed an inverse-J-shaped population structure pattern. The species was estimated to have an area of occupancy and extent of occurrence of 8 km2. The invasive langkap palm (Arenga obtusifolia, Arecaceae) was identified as the main threat for kokoleceran. Based on these results, kokoleceran appears to more than justify its conservation status of Critically Endangered B1ab(iii,v) +2ab(iii,v); C2a(ii).
Rafflesia is the most magnificent and largest flower in the world. In Southeast Asia, the species becoming endangered due to anthropogenic activities such as logging, conversion of forest into large-scale agricultural areas, urbanization and unsustainable ecotourism. This paper has specifically highlighted the efforts that have been taken by the Kelantan State Forestry Department (KFD) in ensuring the sustainability and survival of this gigantic flower in its natural habitat. A survey by Universiti Malaysia Kelantan (UMK) shows that many populations of Rafflesia were situated in the forest reserves under the administration of KFD, such as in Lojing, Mt. Chamah, Mt. Basor and Mt. Stong. A lot of initiatives have been implemented by KFD such as organising scientific expeditions and the establishment of the High Conservation Value Forest (HCVF). In July 2011, the State Government of Kelantan declared an area of 404 ha (1,000 acres) bordering Sg. Berok Forest Reserve in Lojing Highlands as the Rafflesia Preservation Area. This recognition by the state government resulted from collaboration efforts of UMK, KFD and South Kelantan Development Authority (KESEDAR). To date, KFD has established a total of two HCVFs in Kelantan and a new area of 50 ha in Compartment 1, Lojing Forest Reserve has also been dedicated for the protection of Rafflesia. This paper was also briefly discussed several issues and challenges in conserving Rafflesia in Kelantan such as the expansion of large-scale agricultural plantation, participation of local community, tourism and income generation, international and internal funds for conservation works, and provide an integrated tourism and management plans. Hopefully, this effort will lead to the establishment of a centre of excellence in nature conservation, ecotourism and scientific research of Rafflesia in Kelantan.
Known to have a long history of timber extraction, Mursala Island on the west coast of North Sumatra Province is a small island home to the endemic tree Dipterocarpus cinereus and many other Dipterocarpaceae species. In the present study, distance sampling using line-transect was used to assess the species diversity and population status of Dipterocarpaceae species on the Island. A total of 26 Dipterocarpaceae species from 6 genera was identified from Mursala Island. The genus that was represented by the highest number of species was Shorea (13 species), followed by Vatica (5), Dipterocarpus (4), Hopea (2), Cotylelobium (1) and Dryobalanops (1). Among these, two Mursala Island endemic were identified: D. cinereus and H. bancana. Furthermore, according to IUCN Red List category, 11 species (42.3%) were classified as critically endangered, four species (15.4%) were of endangered, 5 species (15.2%) were of vulnerable, one species was of near threatened, 2 species were of least concern and 3 species were not assessed yet. Based on distance analysis, the species with the highest individual density was S. multiflora (21.72±10.96 individual/ha), whereas species with the lowest density was S. johorensis (0.06±0.01 individual/ha). Two main threats for Dipterocarpaceae species in Mursala Island were observed during the survey: illegal logging and habitat conversion. Increasing the protection level of the island was recommended to conserve all the species of Dipterocarpaceae. Besides, providing alternative sources of living for the illegal logger through commercialization of non-timber forest products, ecotourism, and the sustainable fishery was recommended so that they could stop illegal logging activity.
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