Analysis of Tropical Forest Landscape Fragmentation in Batang Toru Watershed, North Sumatra

Samsuri, Samsuri; Jaya, Indra; Kusmana, Cecep; Murtilaksono, Kukuh

doi:10.7226/jtfm.20.2.77

Cited by 11 publications

(13 citation statements)

References 29 publications

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“…Batang Toru is the last refuge for this southernmost orangutan population of Sumatra. The landscape has been fragmented overtime from 1989 to 2013 (Samsuri et al 2014). This fragmentation split the population into several blocks: west block (581 individuals), east block (162 individuals), and Sibualbuali Nature Reserve (24 individuals) (Wich et al 2019).…”

Section: Introductionmentioning

confidence: 99%

The distribution and density of Tapanuli orangutans (Pongo tapanuliensis) at potential corridor locations between forest fragments in Batang Toru, North Sumatra, Indonesia

Nasution

Perwitasari-Farajallah

Utami-Atmoko

2020

Biodiversitas

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Abstract. Nasution A, Perwitasari-Farajallah D, Utami-Atmoko SS. 2020. The distribution and density of Tapanuli orangutans (Pongo tapanuliensis) at potential corridor locations between forest fragments in Batang Toru, North Sumatra, Indonesia. Biodiversitas 21: 5382-5388. The newly discovered Tapanuli orangutan (Pongo tapanuliensis) is in danger of being lost in a few decades due to their small population number in fragmented forest of Batang Toru. The major threats faced by this critically endangered ape, including: hunting, habitat loss, and fragmentation due to large infrastructure development and other developments in the key corridor area. The establishment of corridor and buffer zone is one such effort to maintain their population and bring them from the brink of extinction. Data on the population and distribution are needed to assess and provide baseline information for investigating the habitat condition of potential corridors and buffer zones. This study aimed to analyze population and distribution of Tapanui orangutan (Pongo tapanuliensis) in buffer zone and potential corridor of Batang Toru. Our study provides an initial dataset prior to the development of the hydrodam, which is important to understand the future post-development impact. The study was carried out in disturbed (Hutaimbaru and Bulu Mario) and undisturbed forest (Sitandiang and Hopong) of Batang Toru from June 2015 until February 2016. Orangutan nest, fig (Ficus spp.), and trees bearing fruit were recorded using a line transect method. This research showed that population and distribution of orangutan were influenced by forest conditions, threat level, and fruit availability. There were fewer nests per km2 in disturbed forest than in undisturbed forest, resulting in an orangutan density estimation to be 0.24 ind/km2, 0.14 ind/ km2 (Hutaimbaru and Bulu Mario) and 0.74 ind/km2, 0.36 ind/km2 (Sitandiang and Hopong). Number of nest in transects was influenced by the availability of fig class I and class II, but not fruit tree. The APL forest of Sitandiang is key area to connect the three populations of Tapanuli orangutan: east Batang Toru, west Batang Toru, and Sibualbuali. Furthermore, orangutan’s nests were encountered both in protected and non-protected forest, thus protection of such areas, especially areas including primary forest that harbor orangutan is essential for their long term survival. The conservation measures and action Tapanuli orangutan is alarming, thus we recommend all remaining habitat should be officially and strictly protected and collaboration work with multi-stakeholder is essential to establish the corridor as well as the strategic management plan of Tapanuli orangutan.

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Section: Introductionmentioning

confidence: 99%

The distribution and density of Tapanuli orangutans (Pongo tapanuliensis) at potential corridor locations between forest fragments in Batang Toru, North Sumatra, Indonesia

Nasution

Perwitasari-Farajallah

Utami-Atmoko

2020

Biodiversitas

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“…Banyak ahli yang menemukan keterkaitan meningkatnya angka populasi dengan semakin berkurangnya areal hutan didorong motif kebutuhan akan lahan permukiman. Penelitian (Dariono, Siregar, & Nofrizal, 2018), (Sunderlin & Resosudarmo, 1996), (Carr, 2009) serta (Liu, 2013) dan (Samsuri, Jaya, Kusmana , & Murtilaksono, 2014) menunjukan bahwa laju pertumbuhan penduduk menjadi pendorong utama terbukanya areal hutan dan deforestasi. Penelitian lainnya sebagaimana dilakukan (Imai, Furukawa, Tsujino, Kitamura, & Yumoto, 2018) juga menemukan bahwa faktor kependudukan dan lingkungan menjadi pendorong terbesar terjadinya deforestasi di kawasan Asia Tenggara pada periode 1980-2010.…”

Section: Pendahuluanunclassified

“…Selanjutnya dari aspek sosial dan demografi angka Indeks Pembangunan Manusia dan Jumlah Penduduk berpengaruh signifikan dengan arah negative dan ratio pengangguran terbuka berpengaruh signifikan dengan arah positif terhadap perubahan luas area hutan. Temuan tersebut sejalan dengan pandangan (Dariono, Siregar, & Nofrizal, 2018), (Sunderlin & Resosudarmo, 1996), (Liu, 2013), (Samsuri, Jaya, Kusmana , & Murtilaksono, 2014) dan (Imai, Furukawa, Tsujino, Kitamura, & Yumoto, 2018). Berkaitan dengan aspek Lingkungan dan fisik terutama kegiatan pembukaan lahan hutan untuk lahan pertanian perkebunan terdapat pengaruh yang signifikan dengan arah positif terhadap perubahan luas area hutan.…”

Section: Spesifikasi Modelunclassified

“…Langkah dan alternatif kebijakan adalah dengan meningkatkan upaya intensifikasi lahan dan teknologi pertanian dan di sisi lain mengurangi ektensifikasi salah satunya dengan menetapkan peraturan dan kebijakan yang ketat sehingga area hutan tidak semakin berkurang, misalnya pemberian sanksi yang berat dan tegas terhadap pembukaan lahan pertanian secara liar dan pembakaran hutan. Sejalan dengan temuan para peneliti terdahulu seperti (Dariono, Siregar, & Nofrizal, 2018), (Sunderlin & Resosudarmo, 1996) dan (Samsuri, Jaya, Kusmana , & Murtilaksono, 2014) dan temuan terbaru dari (Imai, Furukawa, Tsujino, Kitamura, & Yumoto, 2018), penelitian ini juga menemukan pengaruh yang signifikan dengan arah negative dari peningkatan jumlah penduduk. Dengan peningkatan penduduk sebesar 1.000 orang maka akan membuka area hutan kawasan Asia Tenggara seluas 1,42 kilometer persegi untuk mendukung kebutuhan hidup.…”

Section: Diskusi Dan Alternatif Kebijakanunclassified

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Determinan Deforestasi Negara-Negara Di Kawasan Asia Tenggara Periode 2008-2015

Handalani¹

2019

pwk

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This study aims to analyze the process of changing forest area or deforestation that is multidimensional and complex, encompassing economic aspects, aspects of governance, social and demographic aspects and physical and environmental aspects represented by 15 independent variables in 10 countries in Southeast Asia in the year period 2008-2015. The analysis and study besides relying on the theoretical foundation and previous research also included several variables that describe the complexity and multidimensional changes in forest area. However, these efforts are often constrained by incomplete data and data reliability. In contrast to some previous studies which focused more on economic aspects or aspects of population increase that affected changes in forest area. This research also includes aspects of governance and social and demographic aspects as well as environmental aspect which are expected to complement the spectrum and study of the problems of deforestation and forest degradation. The method used in this study uses pooled least squares and a series of tests to produce the best model specifications and estimators. In research that uses a 95% confidence level on p-value at a value of α = 0.05, it was found that from 15 variables there were only 6 (six) variables that significantly affected the increase in the human development index.

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“…Salah satu penggunaan lahan yang dapat dikonversi adalah hutan, sehingga akan berdampak juga kepada aspek ekologis (Samsuri et al, 2014). Laju deforestasi di Pulau Sulawesi dibawah 2 persen pada kurun waktu 1990 sampai 2018 (Rijal et al, 2019).Hal tersebut lebih lebih tinggi dibanding dengan rata-rata deforestasi negara-negara Asia Tenggara yang berada pada angka 1 % periode 1990-2000 dan 0.4% dalam kurun waktu 2000-2010 (Sulistiyono et al, 2015).…”

Section: Pendahuluanunclassified

Pengembangan Agroforestry Kopi dalam Mendukung Peran Hutan di Kawasan Highland Kabupaten Jeneponto

Rijal

Bachtiar

Anwar

et al. 2019

Jhm

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Deforestation and degradation of land covert to agricultural for fulfill public food needs keep continues. Deforestation and degradation of land will cause many ecological problems such as declining soil fertility, erosion, extinction of flora and fauna, floods, droughts and even global environmental changes. Agroforestry is a combination of agricultural and forestry crops that can become one of the land management system as a solution to overcome ecological problems and also to overcome food problems. The research aims of the development of coffee-based agroforestry in Jeneponto district is to increase the productivity of land on the Jeneponto highland with the agroforestry system. The novelty of this research is to apply agroforestry to the type of coffee in accordance with land suitability on the Jeneponto high land. The research was conducted for five months in the Jeneponto highland. The land-carateristic inventory, analysis of land suitability and socio-economic analysis of the community in cultivating coffee using geographic information systems (GIS) methods and descriptive analysis. The results showed that the Arabica coffee spread was found in the northern part of Rumbia sub-district, while Robusta coffee spread is found in the south of sub-district and one village in Kelara sub-district. Land suitability for the development of Robusta coffee in all areas of Kelara sub-district, South Rumbia subdistrict and the development of Arabica coffee in the northern part of Rumbia subdistrict. The development of agroforestry coffee in the highlands of Jeneponto district is expected to increase public income and optimize the function of soil and water conservation in the Jeneponto highland.

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Analysis of Tropical Forest Landscape Fragmentation in Batang Toru Watershed, North Sumatra

Abstract: Abstract

Cited by 11 publications

References 29 publications

The distribution and density of Tapanuli orangutans (Pongo tapanuliensis) at potential corridor locations between forest fragments in Batang Toru, North Sumatra, Indonesia

The distribution and density of Tapanuli orangutans (Pongo tapanuliensis) at potential corridor locations between forest fragments in Batang Toru, North Sumatra, Indonesia

Determinan Deforestasi Negara-Negara Di Kawasan Asia Tenggara Periode 2008-2015

Pengembangan Agroforestry Kopi dalam Mendukung Peran Hutan di Kawasan Highland Kabupaten Jeneponto

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