RISK ASSESSMENT OF INVASIVE ALIEN PLANT SPECIES IN PANGANDARAN NATURE RESERVE, WEST JAVA, INDONESIAArif Mukhtar Hasbi and Dian Rosleine
As a member of Convention on Biological Diversity (CBD), Indonesia has confirmed to prevent, control and eradicate invasive alien species (IAS) in order to maintain biodiversity. Pangandaran Nature Reserve(PNR) is one of conservation areas that have been invaded by IAS plants. However, ineffective control method and strategy of IAS plants lead to persistence of these species in this area. Therefore, this study is conducted to assess risk of IAS plants and propose recommendation strategy to manage them. IAS plants are assessed through two indices, risk index and feasibility index, of which each is calculated based on risk assessment protocol by Virtue (2008), to determine their strategy of control. There are 10 IAS plants in PNR. Five species with high important value index are selected to be assessed. Risk and feasibility indices and recommendation strategy to manage IAS plants are respectively Tectona grandis (169.2; 169.6; manage species),Chromolaena odorata (149.5; 105.6; manage species), Cynodon dactylon (100.8; 120.45; manage location),Melastoma malabathricum (76.8; 47.52; manage location), Chrysopogon aciculatus (42.88; 49.89; manage location),Fimbristylis monostachya (15.04; 20.19; monitoring). T. grandis has the highest risk of invasiveness, but it has low feasibility of control. Thus, T. grandis, C. odorata and C. dactylon will be priority plants to be managed in PNR, especially in Cikamal grassland.