Siti Sofiah, Luchman Hakim, Rodiyati Azrianingsih, Iyan Robiansyah, Trimanto, Elga Renjana, Titiek Setyawati
Many plant species native to Java are at risk of becoming extinct. The importance of studying the conservation of Smilax on the Java Island arises due to limited information regarding its ecology, endemism, and conservation status on the IUCN Red List. Smilax nageliana is an endemic species in East Java. This research aims to determine the distribution, population status, and microclimate conditions of S. nageliana, and to provide an update on its conservation status based on the IUCN Red List Categories and Criteria. With an Area of Occupancy (AOO) of 28 km2, S. nageliana is qualified as Critically Endangered, falling under the category of Endangered (EN) according to the IUCN Red List Criteria B1ab(iii) + B2ab(iii). Restricted to only two locations and experiencing a steady decrease in area, distribution, and habitat quality because of forest degradation and conversion, this study proposes that the conservation status of S. nageliana should be labelled as critically endangered (CR) C2a(i), D. The MaxEnt model estimated about 108.99 km2 of East Java Province as highly suitable area for S. nageliana’ habitat located in seven regencies, i.e. Blitar, Jember, Lumajang, Magetan, Malang, Pasuruan, and Probolinggo. This study also provides information on the population structure, habitat preferences, ecology, and phenology of S. nageliana. This species has been conserved as part of the ex-situ collection at the Purwodadi Botanical Gardens. © 2024 Elsevier GmbH
Research Center for Ecology and Etnobiology, National Research and Innovation Agency (BRIN), Jl. Raya Jakarta-Bogor Km. 46, West Java, Cibinong, Indonesia; Department of Biology, Faculty of Mathematics and Natural Sciences, University of Brawijaya. Jl. Veteran, East Java, Malang, Indonesia; Research Center for Applied Botany, National Research and Innovation Agency (BRIN), Jl. Raya Jakarta-Bogor Km. 46, West Java, Cibinong, Indonesia
