Ontologia

Afrothismia saingei

T.Franke

ENLR Monde (IUCN)
Pays · région · aire protégée · écorégion · biome

Graphe en cours d’indexation

Calcul du tissu écologique de Afrothismia saingei.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).

Liste rouge IUCN

EN · En dangercritères B2ab(iii)?Inconnue
Évaluation complète
Évaluation
2017 · v3.1
Altitude
301000 m
Profondeur
m
État de la populationExpert
At the Mount Kupé locality only three plants were seen, growing approximately 50 m apart from each other (Franke 2004). The two subpopulations within the Pongara National Park were estimated to comprise more than 250 mature individuals by Dauby et al. (2007). No population data are available for the Waka valley locality; here it is only known from one specimen collection in 1986. Based on this data we estimate a population size of 250–1,000 mature individuals.

Menaces identifiées(7 menaces classées CMP-IUCN)

  • 1_1
    Housing & urban areas
    Slow, Significant DeclinesMinority (<50%)Ongoing
  • 1_3
    Tourism & recreation areas
    Slow, Significant DeclinesMinority (<50%)Future
  • 2_1_1
    Shifting agriculture
    Slow, Significant DeclinesMajority (50-90%)Ongoing
  • 2_1_2
    Small-holder farming
    Slow, Significant DeclinesMinority (<50%)Ongoing
  • 4_1
    Roads & railroads
    Slow, Significant DeclinesMinority (<50%)Ongoing
  • 5_1_2
    Unintentional effects (species is not the target)
    Slow, Significant DeclinesMinority (<50%)Ongoing
  • 5_3_3
    Unintentional effects: (subsistence/small scale) [harvest]
    Slow, Significant DeclinesMajority (50-90%)Ongoing
Description complète des menacesExpert
The main threat to this species across its range is loss and degradation of its evergreen forest habitat, mainly due to agricultural encroachment and logging. The Cameroon location on the western slopes of Mount Kupé is close to Mbule village, and it is threatened by clearance of the forest to grow crops.
Compared to Cameroon, Gabon is relatively sparsely populated by people, and still has much intact forest left. However forests are slowly being lost and about two-thirds of forest cover in the country is reserved for logging (Balinga et al. 2006).  It is likely that this species is still extant at the Waka valley location (to the east of Waka National Park, within the buffer zone); even though it was collected here in 1986 and there was selective logging in this area in the past, its forests are for the moment still largely intact (Balinga et al. 2006). The specific threats to this location are not known; hunting of bushmeat occurs in the area, which may have some impact.

The two Pongara National Park locations, although within a protected area, are threatened by their proximity to the expanding capital city of Libreville, which is half an hour by boat. The majority of people in Gabon are concentrated in urban areas such as Libreville. The Gabonese government has begun a major effort to develop a viable, large-scale ecotourism industry and there are plans to make Pongara National Park into a major tourist area with associated development and infrastructure within the park, and particularly the northern end of the park where the locations for this species are. Walking trails, recreation areas, access roads and hotel accommodation are all planned, and these all pose a future threat to these locations. Current human impacts are from the few tourist resorts around the northern tip of the national park, which are mainly used by weekend locals from Libreville, the several villages within the boundaries of the park and the regular anti-poaching patrols taking place.

Habitats préférentiels (classification IUCN)

  • 1_6Forest - Subtropical/Tropical Moist Lowland
  • 1_9Forest - Subtropical/Tropical Moist Montane
Mesures de conservation recommandéesExpert
No specific conservation measures or management plan are in place for this species. It is recorded from the Pongara National Park, which is one of the 13 areas in Gabon designated as a National Park by the government in 2002. Poaching is a major issue here and there are anti-poaching patrols within the park.There are plans to develop the park into a major ecotourism area, which would particularly impact the northern end of the park, where this species is known to occur. Without signposting, raising awareness of its presence and protecting the sites for this species they could inadvertently be destroyed. Sensitive development and management of tourism within the park is needed to avoid this.
Actions de conservation (4)Expert
  • 1_1Site/area protection
  • 1_2Resource & habitat protection
  • 2_1Site/area management
  • 4_3Awareness & communications
Stress écologiques (26)Expert
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 2_1Species mortality
  • 2_1Species mortality
  • 2_1Species mortality
  • 2_1Species mortality
  • 2_1Species mortality
  • 2_1Species mortality
  • 2_2Species disturbance
  • 2_2Species disturbance
  • 2_2Species disturbance
  • 2_2Species disturbance
  • 2_2Species disturbance
  • 2_2Species disturbance
  • 2_2Species disturbance
Priorités de recherche (2)Expert
  • 1_2Population size, distribution & trends
  • 1_5Threats
Niche IUCN globaleExpert

Royaumes biogéographiques

Afrotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

Forb or HerbParasite
Références bibliographiques (7)Expert
  1. IUCN. 2017. The IUCN Red List of Threatened Species. Version 2017-3. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 5 December 2017).
  2. Onana, J.M. and Cheek, M. 2011. <i>Red Data Book of the Flowering Plants of Cameroon: IUCN Global Assessments</i>. Kew Publishing, Kew, Richmond, Surrey, UK.
  3. Bachman, S., Moat, J., Hill, A.W., de la Torre, J. and Scott, B. 2011. Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. In: V. Smith and L. Penev (eds) e-Infrastructures for data publishing in biodiversity science. <i>Zookeys</i> 150: 117–126.
  4. Maas-van de Kamer, H. and Maas, P.J.M. 2010. Thismiaceae. In: M.S.M. Sosef, J. Florence, L. Ngok Banak, H.P. Bourobou Bourobou and P. Bissiengou (eds), <i>Flore du Gabon volume 41</i>, pp. 59-62. Margraf Publishers, Wekersheim, Germany.
  5. Dauby, G., Parmentier, I. and Stévart, T. 2007. <i>Afrothismia gabonensis</i> sp. nov. (Burmanniaceae) from Gabon. <i>Nordic Journal of Botany</i> 25(5-6): 268-271.
  6. Balinga, M., Sunderland, T., Walters, G., Issembé, Y., Asaha, S. and Fombod, E. 2006. A vegetation assessment of the Waka national park, Gabon. CARPE report, Herbier National du Gabon, LBG, MBG, WCS, FRP and Smithsonian Institution.
  7. Franke, T. 2004. <i>Afrothismia saingei</i> (Burmanniaceae, Thismieae), a new myco-heterotrophic plant from Cameroon. <i>Systematics and Geography of Plants</i> 74(1): 27-33.
Évaluateurs & contributeurs (4)Expert
assessor
Cheek, M. & Rokni, S.
evaluator
Onana, J.-M.
facilitators
Hargreaves, S.
institutions
Royal Botanic Gardens, Kew

Cheek, M. & Rokni, S. 2017. Afrothismia saingei. The IUCN Red List of Threatened Species 2017: e.T110096780A110096785. Accessed on 05 May 2026.

Répartition mondiale (heatmap GBIF)Construction en cours

0 obs · 0 cellules
Construction par partitions temporelles GBIF0%

Source : GBIF — observations agrégées par hexagones 0.2° × 0.2° (~22km). Filtre qualité : précision coordonnée < 10 km. Coloration quantile (q50/70/90/99). Fond carte : OpenFreeMap · © OpenStreetMap.

Distribution mondiale

Calcul de la distribution GBIF· ~10–60 s

Phénologie

Calcul du calendrier d'apparition· ~5–30 s

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Observations & statuts

Cartographie

Bibliographie