Deforestation and IT is Implications for Sumatran Tigers in Bukit Barisan Selatan National Park, Sumatra

Taman Nasional Bukit Barisan Selatan (TNBBS) memiliki ekosistem yang lengkap mulai dari hutan dataran rendahtermasuk hutan mangrove hingga hutan dataran tinggi. Taman nasional ini teridentifikasi sebagai area konservasiprioritas utama untuk harimau sumatra (Tiger Conservation Unit 1). Akan tetapi, banyak tutupan hutan yang digunduli (deforestasi). Deforestasi bukan hanya menjadi ancaman besar bagi kelestarian hutan tetapi juga terhadappopulasi harimau sumatra. Penelitian ini menghubungkan data citra satelit Landsat dengan data survei harimaumenggunakan kamera otomatis (camera traps) untuk mengetahui pola deforestasi, populasi harimau, dan implikasideforestasi terhadap populasi harimau. Hasil penelitian menunjukan sekitar 27% tutupan hutan di TNBBS telahhilang. Rata-rata laju deforestasi dalam satu dasawarsa terakhir (1998 - 2006) sebesar 18,76 km2/tahun. Jumlahharimau menurun dari 57 individu pada tahun 1998 menjadi 22 individu di tahun 2006, dan kepadatan populasinyajuga menurun dari 2,25 individu/100km2 menjadi 1.16 individu/100km2. Harimau di TNBBS memilikihabitat yang bervariasi mulai dari hutan dataran rendah termasuk mangrove ikutan hingga dataran tinggi

Spatial Model of Sumatran Tiger (Panthera Tigris Sumatrae) Potential Habitat Suitability in Bukit Barisan Selatan [Model Spasial Kesesuaian Habitat Harimau Sumatra (Panthera Tigris Sumatrae) Di Taman Nasional Bukit Barisan Selatan, Indonesia]

This study describes on development of habitat suitability for Sumatran tiger in Bukit Barisan Selatan National Park (BBSNP). In this study remotely-sensed data set were linked with tiger and it prey survey using camera trap to identify the environmental and human factors that influences the tiger's potential habitat, and to develop a spatial model as well as in BBSNP. All at once, the study showed that the potential model for estimating the tiger's potential habitat suitability could be developed using environmental and human factors. The most significant factors that influence the tiger habitat suitability in Bukit Barisan Selatan National Park are human factors such as distance to road and distance to forest edge and the environmental factor i.e. the number of tiger prey. The verification of the model shows that the model is capable to estimate the probability of the tiger presence having accuracy of approximately 78%. The model shows that there is no significant difference between the predicted data and actual data and having mean deviation less than 10%

The December 2018 Anak Krakatau Volcano Tsunami as Inferred from Post-Tsunami Field Surveys and Spectral Analysis

© The Author(s) 2019. We present analysis of the December 2018 Anak Krakatau tsunami in Sunda Strait, Indonesia, from a combination of post-tsunami field surveys, bathymetric changes and spectral analysis of the tsunami tide gauge records. Post-tsunami surveys revealed moderate tsunami height along the coast of Sumatra and Java with maximum surveyed runup of 13.5 m and maximum inundation distance of 330 m. At small islands located close to the volcano, extreme tsunami impacts were observed indicating not only a huge tsunami was generated by large amounts of collapse material which caused notable changes of seafloor bathymetry, but also indicates the role of those small islands in reducing tsunami height that propagated to the mainland of Indonesia. Our spectral analysis of tide gauge records showed that the tsunami’s dominant period was 6.6–7.4 min, indicating the short-period nature of the 2018 Sunda Strait tsunami.International Research Institute of Disaster Science, Tohoku University, Japan; Royal Society (grant number CHL\R1\180173); Brunel University London (Brunel Research Initiative and Enterprise Fund 2017/18, BUL BRIEF)