Loasi River Forest Reserve: Difference between revisions
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= Summary = | = Summary = | ||
<div style='float: right'>{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers=OpenStreetMap,OpenTopoMap|-8.181454, 31.123284~[[Loasi River Forest Reserve]]~''Pan troglodytes schweinfurthii | <div style='float: right'>{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers=OpenStreetMap,OpenTopoMap|-8.181454, 31.123284~[[Loasi River Forest Reserve]]~''Pan troglodytes schweinfurthii''}}</div> | ||
* Eastern chimpanzees (Pan troglodytes schweinfurthii) are present in Loasi River Forest Reserve. | * Eastern chimpanzees (''Pan troglodytes schweinfurthii'') are present in Loasi River Forest Reserve. | ||
* The population size is unknown. | * The population size is unknown. | ||
* The population trend is unknown. | * The population trend is unknown. | ||
* The site has a total size of 334 km². | * The site has a total size of 334 km². | ||
* Key reported threats to chimpanzees are | * Key reported threats to chimpanzees are agro-pastoralism, bushmeat hunting, and logging. | ||
* The main conservation activities reported are involving the local community in ape research, education and outreach. | * The main conservation activities reported are involving the local community in ape research, education and outreach. | ||
*The site is a forest reserve. | *The site is a forest reserve. | ||
[[File: Loasi FR WCS.JPG | 300px | thumb| none | Loasi River Forest Reserve © WCS Ruaha-Katavi Landscape Program, Tanzania]] | |||
= Site characteristics = | = Site characteristics = | ||
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{| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table" | {| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table" | ||
|Species | |Species | ||
|''Pan troglodytes schweinfurthii | |''Pan troglodytes schweinfurthii'' | ||
|- | |- | ||
|Area | |Area | ||
| Line 33: | Line 34: | ||
|- | |- | ||
|Habitat types | |Habitat types | ||
|Subtropical/tropical dry forest | |Subtropical/tropical dry forest | ||
|- | |- | ||
|Type of governance | |Type of governance | ||
| Line 40: | Line 41: | ||
[[Types of sites]] [[Governance types]] [[Habitat types]] | [[Types of sites]] [[Governance types]] [[Habitat types]] | ||
= Ape status = | = Ape status = | ||
| Line 60: | Line 62: | ||
|- | |- | ||
|''Pan troglodytes schweinfurthii'' | |''Pan troglodytes schweinfurthii'' | ||
| | |2024 | ||
|Present | |Present | ||
| | | | ||
| | | | ||
| | | | ||
| | |Loasi Forest Reserve | ||
| | |Reconnaissance walk | ||
| | |Spatial mapping | ||
| | |[[#R01073|WCS Tanzania, 2024]] | ||
| | |32 nests of all ages counted in 3 days (Nicholas A pers.comm. 2026). | ||
| | | | ||
|- | |- | ||
|''Pan troglodytes schweinfurthii'' | |''Pan troglodytes schweinfurthii'' | ||
| | |2023 | ||
|Present | |Present | ||
| | | | ||
| | | | ||
| | | | ||
| | |Loasi Forest Reserve | ||
| | |Reconnaissance walk | ||
| | |Spatial mapping | ||
| | |[[#R01072|WCS Tanzania, 2023]] | ||
|45 nests of all ages counted in 5 days (Nicholas A pers.comm. 2026). | |||
| | | | ||
|- | |- | ||
| Line 91: | Line 93: | ||
| | | | ||
| | | | ||
| | |Loasi Forest Reserve | ||
|Reconnaissance walk | |Reconnaissance walk | ||
|Spatial mapping | |Spatial mapping | ||
|WCS Tanzania, 2022 | |[[#R01071|WCS Tanzania, 2022]] | ||
|57 nests of all ages counted in 5 days (Nicholas A pers.comm. 2026). | |57 nests of all ages counted in 5 days (Nicholas A pers.comm. 2026). | ||
| | | | ||
|- | |- | ||
|''Pan troglodytes schweinfurthii'' | |''Pan troglodytes schweinfurthii'' | ||
| | |2005-2009 | ||
| | | | ||
| | | | ||
|0.21 | |||
| | | | ||
| | |Southern Lake Tanganyika | ||
| | |Line transects & recces | ||
| | |Distance sampling | ||
| | |[[#R01069|Davenport et al. 2010]] | ||
| | |60-85 chimpanzees estimated across all sites south of Kipili to Kalambo NFR | ||
| | | | ||
|- | |- | ||
|''Pan troglodytes schweinfurthii'' | |''Pan troglodytes schweinfurthii'' | ||
| | |1997 | ||
|Present | |Present | ||
| | | | ||
| | | | ||
| | |||
|Loasi Forest Reserve | |||
| | | | ||
| | | | ||
| | |[[#R01070|Ogawa et al. 1997]] | ||
| | | | ||
| | |||
| | | | ||
|} | |} | ||
[[Sampling methods]] [[Analytical frameworks]] | [[Sampling methods]] [[Analytical frameworks]] | ||
[[File: Loasi Chimpanzee 2023 WCS Tanzania..JPG | 300px | thumb| none | © WCS Ruaha-Katavi Landscape Program, Tanzania]] | |||
= Threats = | = Threats = | ||
| Line 158: | Line 161: | ||
[[Threats]] | [[Threats]] | ||
= Conservation activities = | = Conservation activities = | ||
| Line 196: | Line 200: | ||
[[Conservation activities]] | [[Conservation activities]] | ||
[[File: Loasi Conservation Outreach WCS.jpg | 300px | thumb| none | Loasi Conservation Outreach © WCS Ruaha-Katavi Landscape Program, Tanzania]] | |||
= Challenges = | = Challenges = | ||
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[[Challenges]] | [[Challenges]] | ||
= Enablers = | = Enablers = | ||
| Line 262: | Line 268: | ||
[[Enablers]] | [[Enablers]] | ||
= Research activities = | = Research activities = | ||
Wildlife Conservation Society has an ongoing monitoring program focused on Loasi and in 2026 will also be confirming whether indeed Loasi is the only chimpanzee population south of Kipili - visiting villages to conduct interviews, followed by reconnaissance walks in any forests of interest (Nicholas A pers.comm. 2026). | Wildlife Conservation Society has an ongoing monitoring program focused on Loasi and in 2026 will also be confirming whether indeed Loasi is the only chimpanzee population south of Kipili - visiting villages to conduct interviews, followed by reconnaissance walks in any forests of interest (Nicholas A pers.comm. 2026). | ||
= Documented behaviours = | = Documented behaviours = | ||
| Line 294: | Line 302: | ||
[[Behaviours]] | [[Behaviours]] | ||
= Exposure to climate change impacts = | = Exposure to climate change impacts = | ||
| Line 304: | Line 315: | ||
= References = | = References = | ||
Alejandra Pascual-Garrido et.al., In Press. New southernmost limit for Pan tool-making: Termite-fishing in the Loasi Forest Reserve, Tanzania. < | <span id="R01068"></span>Alejandra Pascual-Garrido et.al., In Press. New southernmost limit for Pan tool-making: Termite-fishing in the Loasi Forest Reserve, Tanzania. | ||
Davenport, TRB, Mpunga NE, Picton Phillipps, G, Machaga, SJ, De Luca, DW, Kibure O & Abeid, Y. 2010. The conservation status of the chimpanzee in Southern Tanganyika 2005-2009. Unpublished Report. Wildlife Conservation Society. < | |||
Ogawa, H | <span id="R01069"></span>Davenport, TRB, Mpunga NE, Picton Phillipps, G, Machaga, SJ, De Luca, DW, Kibure O & Abeid, Y. 2010. The conservation status of the chimpanzee in Southern Tanganyika 2005-2009. Unpublished Report. Wildlife Conservation Society. | ||
WCS Tanzania 2022. Unpublished field survey report < | |||
<span id="R01070"></span>Ogawa, H. (1997). Reviewed Article: The Discovery of Chimpanzees in the Lwazi River Area, Tanzania: a New Southern Distribution Limit. ''Pan Africa News'', 4(1), 1-3. [https://doi.org/10.5134/143352 doi:10.5134/143352] | |||
WCS Tanzania | |||
<span id="R01071"></span>WCS Tanzania 2022. Unpublished field survey report | |||
<span id="R01072"></span>WCS Tanzania 2023. Unpublished field survey report | |||
<span id="R01073"></span>WCS Tanzania 2024. Unpublished field survey report | |||
'''Page created by: '''Aaron Nicholas''' Date:''' 2026-04-28 | '''Page created by: '''Aaron Nicholas''' Date:''' 2026-04-28 | ||
Latest revision as of 16:29, 12 October 2026
East Africa > Tanzania > Loasi River Forest Reserve
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Summary
- Eastern chimpanzees (Pan troglodytes schweinfurthii) are present in Loasi River Forest Reserve.
- The population size is unknown.
- The population trend is unknown.
- The site has a total size of 334 km².
- Key reported threats to chimpanzees are agro-pastoralism, bushmeat hunting, and logging.
- The main conservation activities reported are involving the local community in ape research, education and outreach.
- The site is a forest reserve.
Site characteristics
Table 1. Basic site information for Loasi River Forest Reserve
| Species | Pan troglodytes schweinfurthii |
| Area | 334 km² |
| Coordinates | Lat: -8.181454 , Lon: 31.123284 |
| Type of site | Protected area (Forest Reserve) |
| Habitat types | Subtropical/tropical dry forest |
| Type of governance | Governance by government |
Types of sites Governance types Habitat types
Ape status
Table 2. Ape population estimates reported for Loasi River Forest Reserve
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pan troglodytes schweinfurthii | 2024 | Present | Loasi Forest Reserve | Reconnaissance walk | Spatial mapping | WCS Tanzania, 2024 | 32 nests of all ages counted in 3 days (Nicholas A pers.comm. 2026). | ||||
| Pan troglodytes schweinfurthii | 2023 | Present | Loasi Forest Reserve | Reconnaissance walk | Spatial mapping | WCS Tanzania, 2023 | 45 nests of all ages counted in 5 days (Nicholas A pers.comm. 2026). | ||||
| Pan troglodytes schweinfurthii | 2022 | Present | Loasi Forest Reserve | Reconnaissance walk | Spatial mapping | WCS Tanzania, 2022 | 57 nests of all ages counted in 5 days (Nicholas A pers.comm. 2026). | ||||
| Pan troglodytes schweinfurthii | 2005-2009 | 0.21 | Southern Lake Tanganyika | Line transects & recces | Distance sampling | Davenport et al. 2010 | 60-85 chimpanzees estimated across all sites south of Kipili to Kalambo NFR | ||||
| Pan troglodytes schweinfurthii | 1997 | Present | Loasi Forest Reserve | Ogawa et al. 1997 |
Sampling methods Analytical frameworks
Threats
Table 3. Threats to apes reported for Loasi River Forest Reserve
| Category | Specific threats | Threat level | Description | Year of threat |
|---|---|---|---|---|
| 2 Agriculture & aquaculture | 2.3 Livestock farming & ranching | Low (up to 30% of population affected) | Agro-pastoralist incursion into the forest reserve, semi-permanent bomas for livestock established, use of water points and fire - general habitat degradation associated with this (Nicholas A pers.comm. 2026). | 2005-Ongoing (2026) |
| 5 Biological resource use | 5.1.1 Subsistence bushmeat hunting | Medium (30-70% of population affected) | Villages growing in size adjacent to the reserve, regular evidence of hunting using dogs, guns and drop traps detected (Nicholas A pers.comm. 2026). | 2005-Ongoing (2026) |
| 5 Biological resource use | 5.3 Logging & wood harvesting | Low (up to 30% of population affected) | Selective logging of mainly hardwood species (Nicholas A pers.comm. 2026). | 2005-Ongoing (2026) |
Conservation activities
Table 4. Conservation activities reported for Loasi River Forest Reserve
| Category | Specific activity | Description | Implementing organization(s) | Year of activity |
|---|---|---|---|---|
| 4 Education & awareness | 4.1 Educate local communities about apes and sustainable use | Outreach with local primary and secondary schools (Nicholas A pers.comm. 2026). | Wildlife Conservation Society (WCS) | 2022 |
| 4 Education & awareness | 4.2 Involve local community in ape research and conservation management | Recruit local field assistance and trackers for monitoring work (Nicholas A pers.comm. 2026). | Wildlife Conservation Society (WCS) | 2022-Ongoing (2026) |
| 7 Economic & other incentives | 7.2 Provide non-monetary benefits to local communities for sustainably managing their forest and its wildlife (e.g., better education, infrastructure development) | Support village land use planning to put aside areas of natural habitat adjacent to Loasi - community forest establishment (Nicholas A pers.comm. 2026). | Wildlife Conservation Society (WCS) | 2023 |
| 5 Protection & restoration | 5.2 Legally protect ape habitat | The site is a Forest Reserve since 1957. WCS promotes the upgrading of Loasi to Nature Forest Reserve status and merge with adjacent Kalambo NFR (Nicholas A pers.comm. 2026). | Wildlife Conservation Society (WCS) | 1957-Ongoing (2026) |
Challenges
Table 5. Challenges reported for Loasi River Forest Reserve
| Challenges | Specific challenges | Source | Year(s) |
|---|---|---|---|
| 2 Resources and capacity | 2.2 Lack of staff | Nicholas A pers.comm. 2026 | 1957-Ongoing (2026) |
| 2 Resources and capacity | 2.4 Lack of continuous/long-term funding | Nicholas A pers.comm. 2026 | Ongoing (2026) |
| 2 Resources and capacity | 2.7 Lack of infrastructure | Nicholas A pers.comm. 2026 | 1957-Ongoing (2026) |
| 4 Institutional support | 4.2 Lack of government support | Nicholas A pers.comm. 2026 | 1957-Ongoing (2026) |
Enablers
Table 6. Enablers reported for Loasi River Forest Reserve
| Enablers | Specific enablers | Source | Year(s) |
|---|---|---|---|
| 1 Site management | 1.1 Effective leadership | Nicholas A pers.comm. 2026 | Ongoing (2026) |
| 2 Resources and capacity | 2.3 Continuous/long-term funding | Nicholas A pers.comm. 2026 | Ongoing (2026) |
| 3 Engaged community | 3.4 Anticipated advantages/benefits of conservation activities | Nicholas A pers.comm. 2026 | Ongoing (2026) |
| 4 Institutional support | 4.3 Strong transboundary cooperation | Nicholas A pers.comm. 2026 | 2023-Ongoing (2026) |
Research activities
Wildlife Conservation Society has an ongoing monitoring program focused on Loasi and in 2026 will also be confirming whether indeed Loasi is the only chimpanzee population south of Kipili - visiting villages to conduct interviews, followed by reconnaissance walks in any forests of interest (Nicholas A pers.comm. 2026).
Documented behaviours
Table 7. Behaviours documented for Loasi River Forest Reserve
| Category | Behavior | Observation type | Prevalence | Observation dates | Source | Habituation | Species | Comment |
|---|---|---|---|---|---|---|---|---|
| Termite fishing | Pascual-Garrido et al., in press |
Exposure to climate change impacts
External links
References
Alejandra Pascual-Garrido et.al., In Press. New southernmost limit for Pan tool-making: Termite-fishing in the Loasi Forest Reserve, Tanzania.
Davenport, TRB, Mpunga NE, Picton Phillipps, G, Machaga, SJ, De Luca, DW, Kibure O & Abeid, Y. 2010. The conservation status of the chimpanzee in Southern Tanganyika 2005-2009. Unpublished Report. Wildlife Conservation Society.
Ogawa, H. (1997). Reviewed Article: The Discovery of Chimpanzees in the Lwazi River Area, Tanzania: a New Southern Distribution Limit. Pan Africa News, 4(1), 1-3. doi:10.5134/143352
WCS Tanzania 2022. Unpublished field survey report
WCS Tanzania 2023. Unpublished field survey report
WCS Tanzania 2024. Unpublished field survey report
Page created by: Aaron Nicholas Date: 2026-04-28