An agro-ecological survey of the Boé province, Guinea Bissau

Wit, Piet de; Reintjes, H.C.

doi:10.1016/0167-8809(89)90121-7

Cited by 3 publications

(2 citation statements)

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“…1). The Boé region covers 3,289 km 2 (Wit & Reintjes, 1989). As part of the Fouta Djallon massif, the landscape consists of flat plateaux and steep-edged, narrow river valleys.…”

Section: Study Areamentioning

confidence: 99%

Conservation of chimpanzeesPan troglodytes verusand other primates depends on forest patches in a West African savannah landscape

Binczik

Roig-Boixeda

Heymann³

et al. 2017

Oryx

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Habitat loss and fragmentation, hunting pressure, and human–wildlife conflict threaten the survival of primates across Africa. Particularly dramatic forest losses have occurred outside protected areas in the Guinean forest–savannah transition zone. Using the Boé region, Guinea-Bissau, as a case study, we investigated whether and how this rapidly humanized mosaic of wooded savannah, gallery forests and cropland could sustain viable primate populations. We conducted line transect surveys and reconnaissance (recce) walks to assess populations of one Critically Endangered (chimpanzee Pan troglodytes verus), one Endangered (Temminck's red colobus Piliocolobus badius temminckii), one Vulnerable (king colobus Colobus polykomos), and one Near Threatened (sooty mangabey Cercocebus atys) arboreal primates across a 104 km2 section of Boé in the dry season of 2016. Using the standing crop nest count method we estimated a relatively high chimpanzee density (0.77 individuals per km2, 95% CI 0.45–1.34). An assessment of habitat selection showed that chimpanzees prefer semi-dense forest and fallow fields with remnant old trees for nesting, and locations close to rivers. The other primates studied occurred in extremely low densities and were largely restricted to gallery forests. Our results indicate a need for immediate action to ensure the long-term survival of the primate community in the human-dominated landscape of Boé. Our recommendations include action to maintain hunting pressure at a low level, restoring and protecting gallery forests, introducing incentives for farmers for forest protection and primate-friendly practices, and extending the conservation programme to all arboreal primates in the region.

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“…1). The Boé region covers 3,289 km 2 (Wit & Reintjes, 1989). As part of the Fouta Djallon massif, the landscape consists of flat plateaux and steep-edged, narrow river valleys.…”

Section: Study Areamentioning

confidence: 99%

Conservation of chimpanzeesPan troglodytes verusand other primates depends on forest patches in a West African savannah landscape

Binczik

Roig-Boixeda

Heymann³

et al. 2017

Oryx

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“…Soils in Ronde Hill are shallow and mostly in the early stages of laterization. As a consequence, savanna is predominant, and forests occur only where the topsoil layer is deeper than 1 m and does not flood for prolonged periods (Wit & Reintjes, ).…”

Section: Methodsmentioning

confidence: 99%

Density and distribution of western chimpanzees around a bauxite deposit in the Boé Sector, Guinea‐Bissau

Dias

Wenceslau²,

Marques

et al. 2019

American J Primatol

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The Boé sector in southeast Guinea-Bissau harbors a population of western chimpanzees (Pan troglodytes verus) that inhabits a mosaic of forest and savanna.The Boé sector contains a substantial bauxite deposit in a region called Ronde Hill, and there are plans for the construction of a mine, which may endanger the chimpanzee population. In 1-week survey in May 2013, we used the standing crop nest counts method to obtain the number of chimpanzee nests and from that estimate the density and abundance of chimpanzees. We carried out five 1-km line transects that covered the bauxite deposit and surrounding valleys. We used density surface modeling to analyze habitat preferences, then predicted chimpanzee nest density and distribution based on environmental variables. We found the projected location of the mine partially coincides with an area of high predicted abundances of chimpanzee nests and is surrounded by highly suitable areas for chimpanzees (northeast and southwest). We conclude the mine could have significant direct and indirect effects on this population of chimpanzees whose impacts must be carefully considered and properly mitigated if the mine is built.

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