Distribution Modelling of Invasive Alien Plant Species (Ageratina riparia (Regel) R.M.King & H.Rob and Clidemia hirta (L.) D. Don) In Masigit Kareumbi Game Reserve, West Java

• Main Author: NAFITRI CAHYANINGRUM - NIM: 11514004, DIANI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26614
• Institution: Institut Teknologi Bandung

<p align="justify">The problem of alien plant invasion are faced by most of conservation area in Indonesia, including Masigit Kareumbi Game Reserve (MKGR). One of their management programs that is the javan deer (Rusa timorensis de Blainville, 1982) introduction program was inhibited by the presence and spread of Ageratina riparia dan Clidemia hirta as both are potentially can become a competitor for feed plant to grow. The study conducted in areal which is planned as game park cluster I with 200 hectares in width. The study aim to predict the distribution probability of A. riparia and C. hirta also to determine the environmental variabels which have the significant contribution to their distribution using maximum entropy (MaxEnt) model. The models were built using presence-only datasets and seven background (environmental) variables with 10-fold cross-validation. The environmental variables used i.e: landcover, vegetation index (normalized difference vegetation index), moisture index (normalized difference moisture index), distance to river, elevation, slope and aspect. The models were validated using the area under ROC curve (AUC). It shown that each of Ageratina riparia and Clidemia hirta have AUC value of 0,820 and 0,816 respectively. The jackknife test shown that slope and elevation had significant contribution for A. riparia while the significant contribution for C. hirta only given by slope variable. Average respon curve of envinronmental variables resulted the presence probability of A.riparia dan C. hirta were at between 1200-1300 a.s.l and at 100° southeast then decrease after 300&#730; west direction.<p align="justify">