Characteristic of Orangutan Habitat in Coal Mining Rehabilition Area in East Kalimantan, Indonesia

Niningsih, Liza; Alikodra, Hadi S.; Atmoko, Sri Suci Utami; Mulyani, Yeni

doi:10.7226/jtfm.23.1.34

Cited by 3 publications

(9 citation statements)

References 26 publications

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“…The botanical plot analysis in the CMRA showed that this area is measly discovered largediameter trees (Niningsih et al 2017). This condition explains why the orangutans in this area more frequently making their nests on small-diameter trees (dbh ≤ 20 cm).…”

Section: Characteristics Of Nest Treesmentioning

confidence: 84%

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Nesting Behavioral Adaptations of Orangutan (Pongo Pygmaeus Morio) in Coal Mining Area in East Kalimantan

Niningsih¹,

Atmoko²,

Alikodra³

et al. 2021

JBL

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Coal mining changed forest structure and composition, it caused large negative impacts on the orangutan. In order to mitigate those negative effects, it is crucial to understand their nesting behavior adaptation in mining area. We investigated 74 times nested event in coal mining rehabilition area (CMRA) in East Kutai and 123 times in the Kutai National Park (Prevab) from October 2013 to September 2014 and include only night nests. We compared both habitats. Orangutans in CMRA built the nest later than in Prevab and used 15 species of trees as nests sites intensively on Senna siamea and Gmelina arborea. In Prevab, 35 species with the higher frequencies on Eusideroxylon zwageri and Dracontomelon dao. The average diameter of nest trees in CMRA smaller than Prevab. The height of nest trees in CMRA with the highest frequency was in 10.1-15 m, while in Prevab was as in 20.1-25 m. Orangutans in CMRA nested at the height of <15 m, lower than in Prevab was >20 m. Reused nest in CMRA was higher than in Prevab. Orangutans in CMRA more often built nests at the peak and limb, while in Prevab at the limb and peak. Orangutans in CMRA had learned to utilize various species and dimensions of trees as the place to build nests.

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Section: Characteristics Of Nest Treesmentioning

confidence: 84%

“…The frequency of use tree top position as a nest at CMRA was higher than the natural habitat. Selecting this position is surmised due to the small-diameter trees with small ramification is the most dominant at CMRA (Niningsih et al 2017).…”

Section: Figure 13 Distribution Of Nests Height (-■-) and Height Of Orangutan Nest Trees (-♦-) At Cmramentioning

confidence: 99%

Nesting Behavioral Adaptations of Orangutan (Pongo Pygmaeus Morio) in Coal Mining Area in East Kalimantan

Niningsih¹,

Atmoko²,

Alikodra³

et al. 2021

JBL

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“…ARPB miskin spesies pohon dimana hanya dijumpai ±28 spesies pohon yang ±80 % diantaranya adalah spesies eksotik. Spesies pohon yang paling dominan di ARPB adalah Senna siamea dan Falcataria moluccana (Niningsih et al, 2017).…”

Section: Metode Penelitianunclassified

“…Orangutan di ARPB diduga telah belajar untuk memanfaatkan sumberdaya yang ada di ARPB agar dapat bertahan hidup, mengingat ARPB bukanlah habitat yang baik bagi orangutan, baik dari aspek penutupan lahan, komposisi pakan, struktur vegetasi, maupun dari kedekatan dengan manusia. ARPB miskin akan jenis pohon buah dan liana berkayu (Niningsih et al, 2017) yang merupakan sumber pakan penting bagi orangutan di habitat alami (Morrogh-Bernard et al 2009). ARPB juga mengalami diskontinuitas tajuk karena pohon-pohon tidak cukup rapat, berukuran kecil, serta miskin liana berkayu yang sangat penting bagi pergerakan arboreal orangutan.…”

Section: Metode Penelitianunclassified

Estimasi Populasi Orangutan Di Areal Reklamasi Pertambangan Batubara Di Kutai Timur, Kalimantan Timur

Liza Niningsih

2023

j.sains, j.saintifik, j.multidisiplin

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Orangutans (Pongo spp.) are currently found only on the islands of Sumatra and Borneo. Bornean orangutan (Pongo pygmaeus) face a high risk of extinction due to almost 80% of the distribution of orangutans in Kalimantan occurs outside of conservation areas. Orangutans are also found in the Coal Mining Rehabilitation Area called ARPB in Sangatta, East Kutai, East Kalimantan. The objective of this research was to estimate the orangutan population living in ARPB in Sangatta. Data collection used direct observation to orangutan found in ARPB. This study has found 41 orangutans in ten ARPBs covering an area of 912.29 ha, from November 2013 to January 2015. The orangutans found consists of 17.07% of adult males, 39.02% of adult females, 12.20% of juveniles, 9.76% of children, and 21.95% of infants. This was an indication of the success of orangutans’ adaptation in the coal mining area, especially in ARPB. The fact about population and demographic structure of orangutans in ARPB leads to indications of the success of orangutans in adapted in ARPB.

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“…Study on species composition and stand structure has been frequently used in assessing restoration (Gunawan et al, 2011), monitoring (Palace et al, 2016;Feldmann et al, 2020;Ramli et al, 2022), and evaluation of degraded natural forest conditions (Gunawan et al, 2011;Marvin et al, 2014;Kituyi, et al, 2018;Segura et al, 2021), and in obtaining information on changes in a forest area due to natural and human-related disturbances (Mawazin & Subiakto, 2013;Nopiansyah et al, 2016;Fischer et al, 2016;Gebeyahu et al, 2019;Pamoengkas et al, 2019;Feldmann et al, 2020;Siti Nurfaeiza et al, 2022;Larocque, 2022;Liang et al, 2022;Zhang et al, 2022), species diversity (Gunawan et al 2011;Soendjoto et al, 2014;Gebeyahu et al, 2019;Segura et al, 2021;Ahmad Fitri et al, 2022;Rohaiza et al, 2022), protected threatened and economic species (Murdjoko et al, 2016;Niningsih et al, 2017;Gebeyahu et al, 2019), and plant communities (Gebeyahu et al, 2019). However, studies of the effects of gap planting implementation to rehabilitate degraded tropical natural forest on its species composition and stand structure remain scarce.…”

Section: Introductionmentioning

confidence: 99%

Does Gap Opening and Planting to Rehabilitate the Degraded Tropical Natural Forests Affect the Forest Composition and Structure?

Elias¹,

Simangunsong²

2022

jtfm

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By 2020, there were 33.4 million ha of degraded forests in Indonesia. If it is not rehabilitated, there will be land-use changes that significantly affect its biodiversity and environment. Gap opening and planting is an important silvicultural regeneration method to rehabilitate degraded tropical natural forests. We studied the subject in a 10 ha degraded lowland tropical natural forest in Central Borneo, Indonesia. The study aims to compare the composition and structure of degraded tropical natural forests before and after gap opening and planting. The methods used consist of 1) gap opening and planting with a proportion of the total gap area to the total degraded natural forest area of 40%; 2) vegetation analysis to assess the composition and structure of forest. The results showed that the gap opening and planting activities led to a decrease in the density of seedlings, saplings, poles, and trees, and cause loss of two species at seedling level and one species at sapling level. The analysis results of the stand structure and species composition, index of species diversity, species evenness index, and community similarity index before and after gap opening and planting of the degraded forest in the study area of 10 ha showed that there is no changes of these variables. These results showed that the use of the gap opening and planting method in the rehabilitation of degraded forests is able to maintain the stability of species composition and stand structure, species diversity, species evenness, and forest communities. In conclusion, the study provided significant empirical results on the composition and structure of degraded tropical natural forests before and after gap opening and planting, which would be instrumental for the development of rehabilitation strategies. It is recommended that the rehabilitation of degraded tropical natural forests in Indonesia can be carried out using the gap opening and planting method.

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Characteristic of Orangutan Habitat in Coal Mining Rehabilition Area in East Kalimantan, Indonesia

Abstract: Abstract

Cited by 3 publications

References 26 publications

Nesting Behavioral Adaptations of Orangutan (Pongo Pygmaeus Morio) in Coal Mining Area in East Kalimantan

Nesting Behavioral Adaptations of Orangutan (Pongo Pygmaeus Morio) in Coal Mining Area in East Kalimantan

Estimasi Populasi Orangutan Di Areal Reklamasi Pertambangan Batubara Di Kutai Timur, Kalimantan Timur

Does Gap Opening and Planting to Rehabilitate the Degraded Tropical Natural Forests Affect the Forest Composition and Structure?

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