Simbaraya Ferralitic Bowe

Bowe Ferralitique de Simbaraya

GUITIPA019
Simbaraya Ferralitic Bowe

Country: Guinea

Administrative region: Kindia (Prefecture)

Central co-ordinates: 9.89611 N, 12.60139 W

Area: 7km²

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

Lowland ferralitic bowal is a threatened habitat type in Guinea. It can support a high diversity of herbaceous species as well as threatened, rare species: Nymphoides guineensis in temporary pools. The Simbaraya bowé is a good example of this habitat type which is under threat in Guinea from mining, gravel extraction, overgrazing, and housing.

Site description

Ferrallitic ironstone bowal area south of the village of Simbaraya in Kindia Prefecture. It is located along the road leading south to Madina Oula (and Sierra Leone). The bowé are surrounded by wooded grassland and there are small wooded islands, temporary ponds and marshes within them.

Botanical significance

Ironstone bowal has a different species composition to bauxite or pure sandstone bowal, though has similar microhabitats present. The bowal at Simbaraya has small ponds with Nymphoides guineensis, grassland with depressions, and wooded islands. There is a species high diversity at this locality. Lowland ferrallitic bowal is a recognised Threatened Habitat type in Guinea and is under threat from mining activities, as the iron is close to the surface.

Habitat and geology

The concretised iron pan is impermeable causing flooding in the rainy season and the formation of temporary marshes. The thin soils support grasses and herbs, either annual species or with tubers to survive the dry season

Conservation issues

Currently no lowland lateritic (ferrallitic) bowal is protected in Guinea. This habitat is threatened by mining, gravel extraction and housing. There is also cattle grazing in the area and fires are set by pastoralist farmers for new grass shoots in the dry season.

Site assessor(s)

Charlotte Couch, Royal Botanic Gardens Kew

Martin Cheek, Royal Botanic Gardens Kew

IPA criterion A 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
Dilophotriche occidentalis Jacq.-Fél. A(i) False False False False False
Nymphoides guineensis A.Raynal A(i) False False False False False

Dilophotriche occidentalis Jacq.-Fél.

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

Nymphoides guineensis A.Raynal

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

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
Low Altitude Lateritic Bowal Grasslands C(iii) False False False

Low Altitude Lateritic Bowal Grasslands

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

General site habitats

General site habitat Percent coverage Importance
Grassland - Subtropical/Tropical Seasonally Wet/Flooded Lowland Grassland No value Major

Grassland - Subtropical/Tropical Seasonally Wet/Flooded Lowland Grassland

Percent coverage:
No value
Importance:
Major

Land use types

Land use type Percent coverage Importance
Agriculture (pastoral) No value Unknown

Agriculture (pastoral)

Percent coverage:
No value
Importance:
Unknown

Threats

Threat Severity Timing
Energy production & mining - Mining & quarrying Medium Ongoing - stable
Agriculture & aquaculture - Livestock farming & ranching - Small-holder grazing, ranching or farming High Ongoing - increasing
Agriculture & aquaculture - Livestock farming & ranching - Nomadic grazing High Ongoing - increasing
Natural system modifications - Fire & fire suppression - Increase in fire frequency/intensity Medium Ongoing - increasing
Residential & commercial development - Housing & urban areas Unknown Future - inferred threat

Energy production & mining - Mining & quarrying

Severity:
Medium
Timing:
Ongoing - stable

Agriculture & aquaculture - Livestock farming & ranching - Small-holder grazing, ranching or farming

Severity:
High
Timing:
Ongoing - increasing

Agriculture & aquaculture - Livestock farming & ranching - Nomadic grazing

Severity:
High
Timing:
Ongoing - increasing

Natural system modifications - Fire & fire suppression - Increase in fire frequency/intensity

Severity:
Medium
Timing:
Ongoing - increasing

Residential & commercial development - Housing & urban areas

Severity:
Unknown
Timing:
Future - inferred threat

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

Recommended citation

Charlotte Couch, Martin Cheek (2024) Tropical Important Plant Areas Explorer: Simbaraya Ferralitic Bowe (Guinea). https://tipas.kew.org/site/simbaraya-ferralitic-bowe/ (Accessed on 21/05/2024)