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Line 6:
!Method
|0.79
−|
|1.71
−|
|0.67
−|0.48
|1.78
−|1.18
|Ongoing (2018)
|2.1 Annual & perennial non-timber crops
−|Unknown
−|Expansion of land for agriculture ([https://whc.unesco.org/en/soc/4202 UNESCO 2021]).
−|Ongoing (2021)
−|-
−|3 Energy production & mining
−|3.2 Mining & quarrying
−|Present, but threat severity unknown
−|Mining activities in the periphery ([https://whc.unesco.org/en/soc/4202 UNESCO 2021]).
−|Ongoing (2021)
−|-
−|4 Transportation & service corridors
|-
−|6 Human intrusions & disturbance
−|
−|Unknown
−|
−|
= Summary =
= Summary =
−<div style="float: right">{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers= OpenStreetMap, OpenTopoMap|3.145201 , 13.038452 ~[[Dja Biosphere (or Faunal) Reserve]]~Pan troglodytes troglodytes, Gorilla gorilla gorilla}}</div>
+<div style="float: right">{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers= OpenStreetMap, OpenTopoMap|3.145201, 13.038452~[[Dja Biosphere (or Faunal) Reserve]]~'Pan troglodytes troglodytes'', ''Gorilla gorilla gorilla''}}</div>
* Central chimpanzees (''Pan troglodytes troglodytes'') and western lowland gorillas (''Gorilla gorilla gorilla'') are present in Dja Biosphere Reserve.
* Central chimpanzees (''Pan troglodytes troglodytes'') and western lowland gorillas (''Gorilla gorilla gorilla'') are present in Dja Biosphere Reserve.
* It has been estimated that 1,258 (95% CI: 779–2,031) gorillas and 2,313 (95% CI: 1,568–3,411) chimpanzees inhabit the site.
* It has been estimated that 1,258 (95% CI: 779–2,031) gorillas and 2,313 (95% CI: 1,568–3,411) chimpanzees inhabit the site.
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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 troglodytes, Gorilla gorilla gorilla
+|'Pan troglodytes troglodytes'', ''Gorilla gorilla gorilla''
|-
|-
|Area
|Area
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Line 29:
|-
|-
|Coordinates
|Coordinates
−|Lat: 3.145201 N , Lon: 13.038452 E
+|Lat: 3.145201 , Lon: 13.038452
|-
|-
|Type of site
|Type of site
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Line 50:
!Species
!Species
!Year
!Year
+!Occurrence
+!Encounter or vistation rate (nests/km; ind/day)
+!Density estimate [ind./ km²] (95% CI)
!Abundance estimate (95% CI)
!Abundance estimate (95% CI)
−!Density estimate [ind./ km²] (95% CI)
+!Survey area
−!Encounter rate (nests/km)
+!Sampling method
−!Area
+!Analytical framework
−!Source
!Source
!Comments
!Comments
Line 61:
Line 63:
|''Pan troglodytes troglodytes''
|''Pan troglodytes troglodytes''
|1995
|1995
+|
+|
+|0.79
|4,155
|4,155
−|620 sq.km
|620 sq.km
|Line transects
|Line transects
+|
|Willamson & Usongo (1995)
|Willamson & Usongo (1995)
|17 transects totaling 94.7km were walked twice at intervals of 5-7 months. Abundance estimate is an extrapolation to the whole surface of the park. Latour (2010) only estimated population densities for the north-east sector of the reserve.
|17 transects totaling 94.7km were walked twice at intervals of 5-7 months. Abundance estimate is an extrapolation to the whole surface of the park. Latour (2010) only estimated population densities for the north-east sector of the reserve.
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|''Gorilla gorilla gorilla''
|''Gorilla gorilla gorilla''
|1995
|1995
+|
+|
+|1.71
|8,995
|8,995
−|620 sq.km
|620 sq.km
|Line transects
|Line transects
+|
|Willamson & Usongo (1995)
|Willamson & Usongo (1995)
|17 transects totaling 94.7km were walked twice at intervals of 5-7 months. Abundance estimate is an extrapolation to the whole surface of the park. Latour (2010) only estimated population densities for the north-east sector of the reserve.
|17 transects totaling 94.7km were walked twice at intervals of 5-7 months. Abundance estimate is an extrapolation to the whole surface of the park. Latour (2010) only estimated population densities for the north-east sector of the reserve.
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|''Pan troglodytes troglodytes''
|''Pan troglodytes troglodytes''
|2010
|2010
+|
+|0.48
+|0.67
|3,524
|3,524
−|620 sq.km
|620 sq.km
|Line transects
|Line transects
+|
|Latour (2010)
|Latour (2010)
|Abundance estimate is an extrapolation to the whole surface of the site. Williamson & Usongo (1995) only estimated population densities for the north-east sector of the reserve. 34 transects were walked in an area of 620 sq.km, totaling 43.4 km.
|Abundance estimate is an extrapolation to the whole surface of the site. Williamson & Usongo (1995) only estimated population densities for the north-east sector of the reserve. 34 transects were walked in an area of 620 sq.km, totaling 43.4 km.
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Line 102:
|''Gorilla gorilla gorilla''
|''Gorilla gorilla gorilla''
|2010
|2010
+|
+|1.18
+|1.78
|9,362.8
|9,362.8
−|620 sq.km
|620 sq.km
|Line transects
|Line transects
+|
|Latour (2010)
|Latour (2010)
|Abundance estimate is an extrapolation to the whole surface of the site. Williamson & Usongo (1995) only estimated population densities for the north-east sector of the reserve. 34 transects were walked in an area of 620 sq.km, totaling 43.4 km.
|Abundance estimate is an extrapolation to the whole surface of the site. Williamson & Usongo (1995) only estimated population densities for the north-east sector of the reserve. 34 transects were walked in an area of 620 sq.km, totaling 43.4 km.
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|''Pan troglodytes troglodytes''
|''Pan troglodytes troglodytes''
|2018
|2018
−|2,313 (1,568–3,411)
+|
+|0.472
|0.43
|0.43
−|0.472
+|2,313 (1,568-3,411)
|Entire site (5260 sq.km)
|Entire site (5260 sq.km)
|Line transects
|Line transects
+|
|Bruce et al. 2018
|Bruce et al. 2018
|283 transects covered 298.2 km. Distance covered in recces: 1681.38 km.
|283 transects covered 298.2 km. Distance covered in recces: 1681.38 km.
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Line 128:
|''Gorilla gorilla gorilla''
|''Gorilla gorilla gorilla''
|2018
|2018
−|1,258 (779–2,031)
+|
+|0.413
|0.24
|0.24
−|0.413
+|1,258 (779-2,031)
|Entire site (5260 sq.km)
|Entire site (5260 sq.km)
|Line transects
|Line transects
+|
|Bruce et al. 2018
|Bruce et al. 2018
|283 transects covered 298.2 km. Distance covered in recces: 1681.38 km.
|283 transects covered 298.2 km. Distance covered in recces: 1681.38 km.
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!Year of threat
!Year of threat
|-
|-
−|1 Residential & commercial development
+|10 Geological events
−|1.2 Commercial & industrial areas
+|
−|Present, but threat severity is unknown
+|Absent
+|
|
|
−|-
|-
−|2 Agriculture & aquaculture
+|12 Other threat
−|
|
−|Unknown
+|Absent
|
|
|
|
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|5 Biological resource use
|5 Biological resource use
|5.1 Hunting & collecting terrestrial animals
|5.1 Hunting & collecting terrestrial animals
−|High
+|High (more than 70% of population affected)
|Intensity of signs of human activity in the northwest area of the reserve and low encounter rates of great ape nests and forest elephant dung in this area (apart from around Bouamir Research Station), suggests that human perturbation continues to influence the distribution of wildlife within the DFR (Bruce et al. 2018).
|Intensity of signs of human activity in the northwest area of the reserve and low encounter rates of great ape nests and forest elephant dung in this area (apart from around Bouamir Research Station), suggests that human perturbation continues to influence the distribution of wildlife within the DFR (Bruce et al. 2018).
|Ongoing (2018)
|Ongoing (2018)
+|-
+|1 Residential & commercial development
+|1.2 Commercial & industrial areas
+|Present (unknown severity)
+|
+|Ongoing (2018)
+|-
+|3 Energy production & mining
+|3.2 Mining & quarrying
+|Present (unknown severity)
+|Mining activities in the periphery ([https://whc.unesco.org/en/soc/4202 UNESCO 2021]).
+|Ongoing (2021)
|-
|-
|5 Biological resource use
|5 Biological resource use
|5.3 Logging & wood harvesting
|5.3 Logging & wood harvesting
−|Present, but threat severity is unknown
+|Present (unknown severity)
|Around the Dja Faunal Reserve other significant threats include mining, logging, agricultural clearance, rubber plantations and the associated demands for bushmeat, and the ecological impacts of existing and planned hydroelectric dams (MINFOF & IUCN 2015).
|Around the Dja Faunal Reserve other significant threats include mining, logging, agricultural clearance, rubber plantations and the associated demands for bushmeat, and the ecological impacts of existing and planned hydroelectric dams (MINFOF & IUCN 2015).
|Ongoing (2018)
|Ongoing (2018)
−|-
|-
|7 Natural system modifications
|7 Natural system modifications
|7.2 Dams & water management/use
|7.2 Dams & water management/use
−|Present, but threat severity is unknown
+|Present (unknown severity)
|Water infrastructure and Mekin hydroelectric dam ([https://whc.unesco.org/en/soc/4202 UNESCO 2021]).
|Water infrastructure and Mekin hydroelectric dam ([https://whc.unesco.org/en/soc/4202 UNESCO 2021]).
|Ongoing (2021)
|Ongoing (2021)
|-
|-
−|8 Invasive & other problematic species, genes & diseases
+|2 Agriculture & aquaculture
+|2.1 Annual & perennial non-timber crops
+|Present (unknown severity)
+|Expansion of land for agriculture ([https://whc.unesco.org/en/soc/4202 UNESCO 2021]).
+|Ongoing (2021)
+|-
+|4 Transportation & service corridors
|
|
|Unknown
|Unknown
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|
|
|-
|-
−|9 Pollution
+|6 Human intrusions & disturbance
|
|
|Unknown
|Unknown
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|
|
|-
|-
−|10 Geological events
+|8 Invasive & other problematic species, genes & diseases
|
|
−|Absent
+|Unknown
|
|
|
|
|-
|-
−|11 Climate change & severe weather
+|9 Pollution
|
|
|Unknown
|Unknown
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|
|
|-
|-
−|12 Other threat
+|11 Climate change & severe weather
|
|
−|Absent
+|Unknown
|
|
|
|