ESTIMATING HABITAT LOSS AND IDENTIFYING REFUGE AREA FOR JAVAN LANGUR (Tracyphitecus auratus) AS IMPACT OF MERAPI ERUPTION 2010
AYUN WINDYONINGRUM, Prof. Dr. H.A. Sudibyakto, M.S.
2013 | Tesis | S2 Geo-Informasi untuk Manajemen Bencana-
The last 2010 Merapi eruption was a cathastropic event which result a huge damage and causalities. The effect of eruption not only descend to human life but also to wildlife. The estimation of habitat loss and spatial analysis of javan langurs’ habitat (Tracyphitecus auratus) due to that event has not been known. Concerning the regular eruption of Merapi Volcano it is important to identify refuge areas and to map species at risk as one of conservation efforts to reduce exctintion. The objective of this research is to estimate habitat loss of Tracyphitecus auratus in 2010 Merapi eruption caused by pyroclastic and to recognize refuge areas. Maxent models was employed to identify suitable habitat before and after 2010 Merapi eruption using seven enviromental variables: landcover, forest canopy density, slope, elevation, annual temperature, monthly and annual precipitation and 45 numbers of presence points. Two suitable habitat models of year 2009 and year 2012 were generated from Maxent at a good scale of 30 by 30m. The area under ROC curve (AUC) and True Skill Statistic (TSS) were used to measure the model’s accuracy. Model of year 2009 and 2012 result value of AUC 0.976 and 0.977 and value of TSS are 0.721 and 0.723 respectively. Landcover, slope and elevation were the most significant variables. The result shows that habitat loss of javan langur caused by pyroclastic was 148 hectares of medium suitable and categorized as temporary habitat loss. Species at risk map suggested that at least 352 hectares of high suitable habitat will be affected by pyroclastic hazard of VEI=4. The identified refuge areas within national park at eastern and northern flank of the volcano and outside Merapi Volcano National Park that found in Wonodoyo, Suroteleng and Mriyan villages may be the best achieved and we suggested that those potential habitat patches could be designated as reserve habitat.
Kata Kunci : Merapi eruption, habitat loss, suitable habitat modeling, Tracyphitecus
