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Central Africa > Democratic Republic of the Congo > Kahuzi-Biega National Park

Summary

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Eastern chimpanzees (Pan troglodytes schweinfurthii) & Grauer's gorillas (Gorilla beringei graueri) are present in Kahuzi-Biega National Park.
The gorilla population in the park has been estimated at 1,571 (95% CI 824–2,993) individuals; the chimpanzee population at 2,500 (95% CI: 1,804–3,462) individuals.
The site has a total size of 6,000 km².
Poaching linked to mining activities is a key threat to great apes at the site.
Conservation activities reported include different types of patrolling, e.g., for surveillance, demarcation, wildlife/threat research and ecotourism.
Kahuzi-Biega National Park was declared a UNESCO World Heritage site in 1980.

Site characteristics

Kahuzi-Biega National Park (KBNP) is located in eastern Democratic Republic of Congo, close to the border with Rwanda. KBNP holds an exceptional diversity of flora and fauna, making it one of the most important sites in the Albertine Rift Valley. The park is named after two dormant volcanoes, Mount Kahuzi (3,308 m) and Mount Biega (2,790 m) (UNESCO). In 1970, Kahuzi-Biega National Park was created and in 1975 its area was extended to 6,000 sq. km. Since then, the park comprises two sectors, the low and high altitude sectors, which are linked by an ecological corridor (UNESCO). In 1980, the site was declared a UNESCO World Heritage site. KBNP is special in that the faunal and floral transition from low to highlands can be observed. With at least 1,178 plant species recorded in the highland sector, KBNP was designated as a centre of diversity for plants by IUCN and WWF in 1994 (UNESCO). KBNP is home to a large proportion of the endangered Grauer's gorilla population; in fact, KBNP and Maiko National Park support the most important Grauer's gorilla populations (Plumptre et al. 2015, Spira et al. 2016).

Table 1. Basic site information for Kahuzi-Biega National Park

Area	6,000 km²
Coordinates	-2.223171, 28.389500
Designation	National Park
Habitat types	Subtropical/tropical moist montane forest

IUCN habitat categories Site designations

Ape status

Between 1996 and 2000, it has been estimated that the highland gorilla population of KNBP decreased by almost 40%; the lowland population also experienced a decline during this time, and the forest corridor connecting the two populations was severed (Maldonado et al. 2012). Thanks to transect surveys conducted between 2015 and 2019 that could cover larger portions of the park, more accurate estimates could be derived (Plumptre et al. 2021). The Grauer's gorilla population is estimated to have declined by 80% in KBNP since the mid-1990s, whereas the chimpanzee population was estimated to have remained stable (Plumptre et al. 2021).

Table 2. Ape population estimates in Kahuzi-Biega National Park

Species	Year	Abundance estimate (95% CI)	Density estimate [ind./ km²] (95% CI)	Area	Method	Source
Gorilla beringei graueri	1978-1979	223	0.37	Kahuzi-Biega National Park	Full count	Murnyak 1981
Gorilla beringei graueri	1990	258		Kahuzi-Biega National Park	Full count	Yamagiwa et al. 1993
Gorilla beringei graueri	2015	213 minimum		KBNP highland sector	Index survey (reconnaissance walk)	Spira et al. 2016
Gorilla beringei graueri	2015	325	0.79	KBNP highland sector	Line transect (Distance)	WCS and ICCN, as cited by Spira et al. 2016
Pan troglodytes schweinfurthii	2011-2019	2,500 (1,804–3,462)		Kahuzi-Biega National Park	Line transect (Distance) and Index survey (reconnaissance walk)	Plumptre et al. 2021
Gorilla beringei graueri	2011-2019	1,571 (824–2,993)		Kahuzi-Biega National Park	Line transect (Distance) and Index survey (reconnaissance walk)	Plumptre et al. 2021

Threats

With the onset of civil war in 1996, armed groups settled within the boundaries of the park, as the Institut Congolais pour la Conservation de la Nature (ICCN), the Congolese wildlife authority, had lost control of the park. This exacerbated natural resource extraction from within the park, including hunting of wildlife for subsistence and trade (Spira et al. 2016). In a 2014 survey of local miners surrounding the site, almost all the interviewed miners stated that they consumed bushmeat regularly because of the lack of alternatives. Most of the respondents also believed that bushmeat hunting had caused declines and local extinctions of some mammals, including great apes (Spira et al. 2019).

Table 3. Threats to apes in Kahuzi-Biega National Park

Category	Specific threats	Threat level	Description	Year of threat
1. Residential & commercial development		Unknown
2. Agriculture & aquaculture		Unknown
3. Energy production & mining	3.2 Mining & quarrying	High	Artisanal mining. Unregulated extraction of gold, tin (cassiterite), tungsten, diamond and coltan. Numerous active mining sites are present in the park. Many mines are controlled by armed militia (Plumptre et al. 2015; Spira et al. 2019).	Ongoing (2019)
4. Transportation & service corridors		Unknown
5. Biological resource use	5.1 Hunting & collecting terrestrial animals	High	High levels of subsistence hunting and bushmeat extraction, linked to mining activities in and around the site (Spira et al. 2019).	Ongoing (2019)
6. Human intrusion & disturbance	6.2 War, civil unrest & military exercises	High	Breakdown of government control with the onset of civil war in 1996. The Congolese wildlife authority lost control of the park; armed groups settled within its boundaries and unregulated extraction of minerals continue to fuel civil conflict in the region (Plumptre et al. 2015).	1996-2003
7. Natural system modifications		Absent
8. Invasive & other problematic species, genes, diseases		Unknown
9. Pollution		Unknown
10. Geological Events		Absent
11. Climate change & severe weather		Unknown
12. Other options		Absent

IUCN Threats list

Conservation activities

KBNP is managed by the Congolese wildlife authority, Institut Congolais pour la Conservation de la Nature (ICCN), which employs rangers (Spira, Kirkby & Plumptre 2019).

Table 4. Conservation activities in Kahuzi-Biega National Park

Category	Specific activity	Description	Year of activity
1. Residential & commercial development	Not reported
2. Agriculture & aquaculture	Not reported
3. Energy production & mining	Not reported
4. Transportation & service corridors	Not reported
5. Biological resource use	5.6. Conduct regular anti-poaching patrols	The park employs several rangers who conduct surveillance, demarcation, and threat research patrols (Spira, Kirkby & Plumptre 2019).	Ongoing (2019)
5. Biological resource use	5.15. Implement monitoring surveillance strategies (e.g. SMART) or use monitoring data to improve effectiveness of wildlife law enforcement patrols	Since 2014 rangers in Kahuzi–Biega National Park have been using SMART (Spira, Kirkby & Plumptre 2019).	2014-Ongoing (2019)
6. Human intrusion & disturbance	Not reported
7. Natural system modifications	Not reported
8. Invasive & other problematic species, genes, diseases	Not reported
9. Pollution	Not reported
10. Education & Awareness	Not reported
11. Habitat Protection	11.2. Legally protect primate habitat	The site is a National Park.	1970-Ongoing (2023)
12. Species Management	Not reported
13. Livelihood; Economic & Other Incentives	Not reported

Conservation activities list (Junker et al. 2017)

Challenges

The most urgent need is to demilitarise artisanal mines in and around KBNP to reduce poaching and enable the ICCN to enforce conservation laws (Spira et al. 2016). Based on a 2015-2016 interview survey of rangers in KBNP, ranger job satisfaction could improve with higher salaries, more promotion opportunities and recognition from the government, positive performance incentives, better security, improved living conditions in remote patrol posts and more support from the judicial system (Spira, Kirkby & Plumptre 2019).

Table 5. Challenges reported for Kahuzi-Biega National Park

Challenge	Source
Civil unrest	Plumptre et al. 2015; Spira, Kirkby & Plumptre 2019
Lack of law enforcement	Plumptre et al. 2015; Spira, Kirkby & Plumptre 2019

Research activities

Documented behaviours

Table 6. Ape behaviors reported for Kahuzi-Biega National Park

Behavior	Source
Not reported

External links

UNESCO World Heritage - Kahuzi-Biega National Park

References

Spira, C., Mitamba, G., Kirkby, A., Kalikunguba, T., Nishuli, R. and Plumptre,A. (2016) Grauer’s Gorilla Numbers Increasing in Kahuzi-Biega National Park Highlands: 2015 Census in Tshivanga Sector. Unpublished report by the Wildlife Conservation Society.
Spira, C., Kirkby, A., Kujirakwinja, D., & Plumptre, A. J. (2019). The socio-economics of artisanal mining and bushmeat hunting around protected areas: Kahuzi–Biega National Park and Itombwe Nature Reserve, eastern Democratic Republic of Congo. Oryx, 53(1), 136-144.
Spira, C., Kirkby, A., & Plumptre, A. (2019). Understanding ranger motivation and job satisfaction to improve wildlife protection in Kahuzi–Biega National Park, eastern Democratic Republic of the Congo. Oryx, 53(3), 460-468. doi:10.1017/S0030605318000856 Plumptre, A.J., Nixon, S., Critchlow, R., Vieilledent, G., Nishuli, R., Kirkby, A., Williamson, E.A., Hall, J.S. & Kujirakwinja, D. (2015). Status of Grauer’s gorilla and chimpanzees in eastern Democratic Republic of Congo: Historical and current distribution and abundance. Unpublished report to Arcus Foundation, USAID and US Fish and Wildlife Service.
Plumptre, A. J., Kirkby, A., Spira, C., Kivono, J., Mitamba, G., Ngoy, E., ... & Kujirakwinja, D. (2021). Changes in Grauer's gorilla (Gorilla beringei graueri) and other primate populations in the Kahuzi‐Biega National Park and Oku Community Reserve, the heart of Grauer's gorilla global range. American Journal of Primatology, 83(7), e23288.
Maldonado, O., Aveling, C., Cox, D., Nixon, S., Nishuli, R., Merlo, D., Pintea, L. & Williamson, E.A. (2012). Grauer’s Gorillas and Chimpanzees in Eastern Democratic Republic of Congo (Kahuzi-Biega, Maiko, Tayna and Itombwe Landscape): Conservation Action Plan 2012–2022. Gland, Switzerland: IUCN/SSC Primate Specialist Group, Ministry of Environment, Nature Conservation & Tourism, Institut Congolais pour la Conservation de la Nature & the Jane Goodall Institute. 66pp.
Murnyak, D. F. (1981). Censusing the gorillas in Kahuzi-Biega National Park. Biol. Conservl, 21, 163-76.
Yamagiwa, J., Mwanza, N., Spangenberg, A., Maruhashi, T., Yumoto, T., Fischer, A. & Steinhauer, B.B. (1993). A census of the eastern lowland gorillas Gorilla gorilla graueri in Kahuzi-Biega National Park with reference to mountain gorillas G.g. beringei in the Virunga region, Zaire. Biol Conserv 64, 83–89.

Page completed by: A.P.E.S. Wiki Team Date: 23/11/2023

@@ Line 44: / Line 44: @@
 = Ape status = <!--An overview of ape population status (population sizes, trends, etc.), followed by a table of specific surveys and results -->
-Between 1996 and 2000, it has been estimated that the highland gorilla population of KNBP decreased by almost 40%; the lowland population also experienced a decline during this time, and the forest corridor connecting the two populations was severed (Maldonado et al. 2012). Thanks to transect surveys conducted between 2015 and 2019 that could cover larger portions of the park, more accurate estimates could be derived. The Grauer's gorilla population is estimated to have declined by 80% in KBNP since the mid-1990s, whereas the chimpanzee population was estimated to have remained stable.
+Between 1996 and 2000, it has been estimated that the highland gorilla population of KNBP decreased by almost 40%; the lowland population also experienced a decline during this time, and the forest corridor connecting the two populations was severed (Maldonado et al. 2012). Thanks to transect surveys conducted between 2015 and 2019 that could cover larger portions of the park, more accurate estimates could be derived (Plumptre et al. 2021). The Grauer's gorilla population is estimated to have declined by 80% in KBNP since the mid-1990s, whereas the chimpanzee population was estimated to have remained stable (Plumptre et al. 2021).
 '''Table 2. Ape population estimates in Kahuzi-Biega National Park'''

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