Diéké Classified Forest

Forêt Classée de Diéké

GUITIPA002
Diéké Classified Forest

Country: Guinea

Administrative region: Yomou (Prefecture)

Central co-ordinates: 7.21000 N, 8.94528 W

Area: 640km²

Qualifying IPA Criteria

A(i)Site contains one or more globally threatened species, B(i)Site contains a high number of species within defined habitat or vegetation types, C(iii)Site contains nationally threatened or restricted habitat or vegetation types, AND/OR habitats that have severely declined in extent nationally

IPA assessment rationale

Dièké Classified Forest is the largest intact area of lowland forest remaining in Guinée Forestière. It has a high diversity of species including 29 threatened species especially timber trees. Many West African trees have their only Guinean location in this forest. Dièké remains to be comprehensively surveyed for its plant species.

Site description

Lowland evergreen forest situated in the south east of Guinée Forestière in Yomou prefecture, close to the border of Liberia. This has been a Classified Forest since 1945. It was previously logged in certain areas leaving an open canopy, but most of the site is still relatively intact forest with an open understory. The forest is bordered by villages and cultivation has encroached on some of the boundaries.

Botanical significance

Dièké is the largest surviving near pristine lowland evergreen forest area in Guinée Forestière. It has many rivers running through it and has a high diversity of plant species including some threatened species e.g. Allophylus samouritourei (Haba, 2018). Large girth trees of timber species are still present forming a dense canopy (Haba, 2016 and 2018).

Habitat and geology

The area is gently undulating with hills reaching 550m, with forested slopes and riverine forest in the valleys. It sits on the late Archean period Mani series of biotite gneiss with localized magnetite. It is part of the Leonean-Liberian crystalline massif.

Conservation issues

Part of the classified forest of Dièké was exploited by the Forët Forte Company between 2003- 2004, but fortunately they did not do much damage in this brief period. However their activities are thought to have caused the presence of invasive species in the forest. Areas in the river valleys (Bas-fonds) have been authorized for rice cultivation in recent years, which has led to the encroachment of fields from the surrounding area. The areas closest to Kéréma, Ouéta, Kilikpala, Nonah and Gboimou are especially threatened by encroachment of fields and by the illegal hunting of the neighboring population. Towards the East, in the zone of Yonsono, Guêpa and Diécké, hunting dominates and so the forest has remained intact. Eco-guards are present, but they do not regularly patrol the forest.

Ecosystem services

Habitat for species

Site assessor(s)

Charlotte Couch, Royal Botanic Gardens Kew

Pépé Haba, Guinée Biodiversité

IPA criterion A qualifying species

Species Qualifying sub-criterion ≥ 1% of global population ≥ 5% of national population 1 of 5 best sites nationally Entire global population Socio-economically important Abundance at site
Allophylus samoritourei Cheek A(i) True True True False True Scarce
Cola attiensis Aubrév. & Pellegr. A(i) True True True False False Unknown
Neolemonniera clitandrifolia A.Chev. A(i) True True True False False Scarce
Tieghemella heckelii (A.Chev.) Pierre ex Dubard A(i) True True True False True Scarce
Albizia ferruginea (Guill. & Perr.) Benth. A(i) True True True False True Scarce
Amanoa bracteosa Planch. A(i) True True True False True Unknown
Cryptosepalum tetraphyllum (Hook.f.) Benth. A(i) True True True False False Abundant
Drypetes afzelii (Pax) Hutch. A(i) True True True False False Scarce
Entandrophragma cylindricum (Sprague) Sprague A(i) True True True False True Scarce
Entandrophragma candollei Harms A(i) True True True False True Scarce
Entandrophragma utile (Dawe & Sprague) Sprague A(i) True True True False True Scarce
Garcinia afzelii Engl. A(i) True True True False True Scarce
Garcinia epunctata Stapf A(i) True True True False True Unknown
Leplaea cedrata (A.Chev.) E.J.M.Koenen & J.J.F.E.de Wilde A(i) True True True False True Scarce
Khaya anthotheca C.DC. A(i) True True True False True Scarce
Khaya ivorensis A.Chev. A(i) True True True False True Scarce
Khaya grandifoliola C.DC. A(i) True True True False True Scarce
Lophira alata Banks ex Gaertn.f. A(i) True True True False True Abundant
Nauclea diderrichii (De Wild. & T.Durand) Merrill A(i) True True True False True Abundant
Pericopsis elata (Harms) Meeuwen A(i) True True True False True Unknown
Terminalia ivorensis A.Chev. A(i) True True True False True Scarce
Cassia fikifiki Aubrev. & Pellegr. A(i) True False False False True Scarce
Copaifera salikounda Heckel A(i) True False False False True Scarce
Tessmannia baikieaoides Hutch. & Dalziel A(i) True False False False True Scarce
Anopyxis klaineana (Pierre) Engl. A(i) True False False False True Scarce
Garcinia kola Heckel A(i) True False False False True Scarce
Guibourtia leonensis J. L�onard A(i) True False True False False Scarce

Allophylus samoritourei Cheek

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Cola attiensis Aubrév. & Pellegr.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
False
Abundance at site:
Unknown

Neolemonniera clitandrifolia A.Chev.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
False
Abundance at site:
Scarce

Tieghemella heckelii (A.Chev.) Pierre ex Dubard

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Albizia ferruginea (Guill. & Perr.) Benth.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Amanoa bracteosa Planch.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Unknown

Cryptosepalum tetraphyllum (Hook.f.) Benth.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
False
Abundance at site:
Abundant

Drypetes afzelii (Pax) Hutch.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
False
Abundance at site:
Scarce

Entandrophragma cylindricum (Sprague) Sprague

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Entandrophragma candollei Harms

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Entandrophragma utile (Dawe & Sprague) Sprague

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Garcinia afzelii Engl.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Garcinia epunctata Stapf

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Unknown

Leplaea cedrata (A.Chev.) E.J.M.Koenen & J.J.F.E.de Wilde

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Khaya anthotheca C.DC.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Khaya ivorensis A.Chev.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Khaya grandifoliola C.DC.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Lophira alata Banks ex Gaertn.f.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Abundant

Nauclea diderrichii (De Wild. & T.Durand) Merrill

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Abundant

Pericopsis elata (Harms) Meeuwen

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Unknown

Terminalia ivorensis A.Chev.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
True
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Cassia fikifiki Aubrev. & Pellegr.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
False
1 of 5 best sites nationally:
False
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Copaifera salikounda Heckel

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
False
1 of 5 best sites nationally:
False
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Tessmannia baikieaoides Hutch. & Dalziel

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
False
1 of 5 best sites nationally:
False
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Anopyxis klaineana (Pierre) Engl.

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
False
1 of 5 best sites nationally:
False
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Garcinia kola Heckel

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
False
1 of 5 best sites nationally:
False
Entire global population:
False
Socio-economically important:
True
Abundance at site:
Scarce

Guibourtia leonensis J. L�onard

Qualifying sub-criterion:
A(i)
≥ 1% of global population:
True
≥ 5% of national population:
False
1 of 5 best sites nationally:
True
Entire global population:
False
Socio-economically important:
False
Abundance at site:
Scarce

IPA criterion C qualifying habitats

Habitat Qualifying sub-criterion ≥ 5% of national resource ≥ 10% of national resource 1 of 5 best sites nationally Areal coverage at site
West African Lowland Evergreen Forest C(iii) False True True 600

West African Lowland Evergreen Forest

Qualifying sub-criterion:
C(iii)
≥ 5% of national resource:
False
≥ 10% of national resource:
True
Areal coverage at site:
600

General site habitats

General site habitat Percent coverage Importance
Forest - Subtropical/Tropical Moist Lowland Forest No value Major

Forest - Subtropical/Tropical Moist Lowland Forest

Percent coverage:
No value
Importance:
Major

Land use types

Land use type Percent coverage Importance
Nature conservation No value Unknown
Forestry No value Unknown
Agriculture (arable) No value Minor

Nature conservation

Percent coverage:
No value
Importance:
Unknown

Forestry

Percent coverage:
No value
Importance:
Unknown

Agriculture (arable)

Percent coverage:
No value
Importance:
Minor

Threats

Threat Severity Timing
Agriculture & aquaculture - Annual & perennial non-timber crops - Shifting agriculture Medium Ongoing - increasing
Biological resource use - Logging & wood harvesting Low Past, not likely to return
Biological resource use - Logging & wood harvesting - Intentional use: subsistence/small scale (species being assessed is the target) [harvest] Medium Ongoing - increasing

Agriculture & aquaculture - Annual & perennial non-timber crops - Shifting agriculture

Severity:
Medium
Timing:
Ongoing - increasing

Biological resource use - Logging & wood harvesting

Severity:
Low
Timing:
Past, not likely to return

Biological resource use - Logging & wood harvesting - Intentional use: subsistence/small scale (species being assessed is the target) [harvest]

Severity:
Medium
Timing:
Ongoing - increasing

Protected areas

Protected area name Protected area type Relationship with IPA Areal overlap
Diéké Classified Forest Classified Forest protected/conservation area matches IPA No value

Diéké Classified Forest

Protected area type:
Classified Forest
Relationship with IPA:
protected/conservation area matches IPA
Areal overlap:
No value

Management type

Management type Description Year started Year finished
No management plan in place No value No value

No management plan in place

Year started:
No value
Year finished:
No value

Bibliography

Lisowski, S., 2009

Flore (Angiospermes) de la République de Guinée.

Couch, C; Magassouba, S; Rokni, S; Cheek, M., 2018

Threatened plants species of Guinea-Conakry: A preliminary checklist

Peerj Preprints

IUCN, 2019

IUCN Red List

Available online

BirdLife International, 2001

Important Bird Areas factsheet: Diecke

Available online

Haba, P., 2016

Mission d’Inventaire des Espèces de la Liste Rouge de Guinée dans la Forêt Classée de Diécké au village Nonah.

Available online

Haba, P., 2018

Rapport de terrain du projet Darwin Initiative en Guinée : Forêt Classée de Diécké : Villages-Guêpa-Yonsono

Available online

Recommended citation

Charlotte Couch, Pépé Haba (2021) Tropical Important Plant Areas Explorer: Diéké Classified Forest (Guinea). https://tipas.kew.org/site/dieke-classified-forest/ (Accessed on 08/05/2021)