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[[Asia]] > [[Indonesia]] > [[Rimba Raya Biodiversity Reserve]]

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__TOC__
= Summary =

<div style='float: right'>{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers=OpenStreetMap,OpenTopoMap|-3.0503, 112.2542~[[Rimba Raya Biodiversity Reserve]]~''Pongo pygmaeus wurmbii''}}</div>
* Southwest Bornean orangutans (''Pongo pygmaeus wurmbii'') are present in Rimba Raya Biodiversity Reserve.
* The orangutan population size is unknown.
* The orangutan population trend is unknown.
* The total site area is 640 km².
* The primary reported threats include peat fires, illegal logging, and encroachment by palm oil plantations.
* The main conservation activities have focused on raising awareness in the community and restoring habitats.
* The site is a REDD+ conservation area since 2013.
= Site characteristics =

Rimba Raya lies within Indonesia’s Seruyan District in Central Kalimantan, flanked by Tanjung Puting National Park to the west and the Seruyan River to the east. The district spans roughly 16.5 million hectares and is divided into six subdistricts, with peatlands accounting for about 9.2% of its area. The region’s key agricultural products are oil palm and rubber ([[#R01546|Indriatmoko et al. 2014]]).

'''Table 1. Basic site information for Rimba Raya Biodiversity Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table"
|Species
|''Pongo pygmaeus wurmbii''
|-
|Area
|640 km²
|-
|Coordinates
|Lat: -3.0503 , Lon: 112.2542
|-
|Type of site
|Protected area (Biodiversity Reserve)
|-
|Habitat types
|Subtropical/tropical swamp forest
|-
|Type of governance
|Private governance
|}

[[Types of sites]] [[Governance types]] [[Habitat types]]
= Ape status =

'''Table 2. Ape population estimates reported for Rimba Raya Biodiversity Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Ape_status-table"
!Species
!Year
!Occurrence
!Encounter or vistation rate (nests/km; ind/day)
!Density estimate [ind./ km²] (95% CI)
!Abundance estimate (95% CI)
!Survey area
!Sampling method
!Analytical framework
!Source
!Comments
!A.P.E.S. database ID
|-
|''Pongo pygmaeus wurmbii''
|
|
|
|
|
|
|
|
|
|
|
|}

[[Sampling methods]] [[Analytical frameworks]]
= Threats =

'''Table 3. Threats to apes reported for Rimba Raya Biodiversity Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Threats-table"
!Category
!Specific threats
!Threat level
!Description
!Year of threat
|-
|2 Agriculture & aquaculture
|2.1.3 Industrial farming (including palm oil)
|Present (unknown severity)
|Agricultural encroachment by palm oil plantations ([[#R02096|Sustainable Travel International 2024]]).
|Ongoing (2024)
|-
|5 Biological resource use
|5.3 Logging & wood harvesting
|Present (unknown severity)
|Illegal logging activities reported present ([[#R02096|Sustainable Travel International 2024]]).
|Ongoing (2024)
|-
|7 Natural system modifications
|7.1 Fire & fire suppression
|Present (unknown severity)
|Peat fires were also documented ([[#R02096|Sustainable Travel International 2024]]).
|Ongoing (2024)
|}

[[Threats]]
= Conservation activities =

'''Table 4. Conservation activities reported for Rimba Raya Biodiversity Reserve'''
{| border="1" cellpadding="5" cellspacing="0" class="Conservation_activities-table"
!Category
!Specific activity
!Description
!Implementing organization(s)
!Year of activity
|-
|5 Protection & restoration
|5.6 Habitat restoration
|Habitat management activities were reported to be present ([[#R01545|Sherman et al. 2022]]).
|
|2013-Ongoing (2022)
|-
|4 Education & awareness
|Other
|Community outreach and capacity building ([[#R01545|Sherman et al. 2022]]).
|
|2013-Ongoing (2022)
|}

[[Conservation activities]]
= Challenges =

= Enablers =

= Research activities =

= Documented behaviours =

= Exposure to climate change impacts =

= External links =

= References =

<span id="R01545"></span>Sherman, J., Voigt, M., Ancrenaz, M., Wich, S. A., Qomariah, I. N., Lyman, E., …, & Meijaard, E. (2022). Orangutan killing and trade in Indonesia: Wildlife crime, enforcement, and deterrence patterns. ''Biological Conservation'', 276, 109744. [https://doi.org/10.1016/j.biocon.2022.109744 doi:10.1016/j.biocon.2022.109744]

<span id="R01546"></span>Indriatmoko, Y., Atmadja, S., Ekaputri, A. D., & Komalasari, M. (2014). Rimba Raya Biodiversity Reserve Project, Central Kalimantan, Indonesia. In REDD+ on the ground: A case book of subnational initiatives across the globe (pp. 348–361). Center for International Forestry Research (CIFOR). Retrieved June 26, 2025, from https://www2.cifor.org/redd-case-book/case-reports/indonesia/rimba-raya-biodiversity-reserve-project-central-kalimantan-indonesia

<span id="R02096"></span>Sustainable Travel International. (2024). Katingan Mentaya Project. Retrieved June 27, 2025, from https://sustainabletravel.org/project/katingan-mentaya-project/

'''Page created by: '''Aime Mizero''' Date:''' 2025-05-28

Rimba Raya Biodiversity Reserve - Revision history