Ontologia

Quercus gemelliflora

Blume

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

Graphe en cours d’indexation

Calcul du tissu écologique de Quercus gemelliflora.

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

Liste rouge IUCN

LC · Préoccupation mineure?Inconnue
Évaluation complète
Évaluation
2020 · v3.1
Altitude
6002600 m
Profondeur
m
État de la populationExpert
There is little information regarding the population of this species.

Menaces identifiées(1 menace classée CMP-IUCN)

  • 2_2_2
    Agro-industry plantations
    Ongoing
Description complète des menacesExpert
The tropical forests of Borneo are highly subject to loss and land conversions for industrial Oil Palm (Elaeis guineensis), Acacia, and Rubber Tree (Hevea brasiliensis) plantations. A study by Gaveau et al. (2014) evaluated forest area loss and land area changes to estimate that Borneo's forested area declined by 30% between 1973 and 2010. As of 2010, 389,566 km2 of Borneo is still forested (including forests that have been logged) and only 209,649 km2 as intact forest (a 60% decline from the forest area in 1973). As Quercus gemelliflora occurs in this region, it is estimated that the species is threatened by habitat loss and land conversion. Additionally, the forested region is subject to fragmentation which threatens the species habitat quality. Finally, the forest change has also left remaining forests more vulnerable to forest fires. However, as Borneo only covers a portion of the species range, it is not expected to be severely threatened by habitat loss across its entire range. Additionally, the deforestation currently occurs in primarily in the lowlands and this species occurs at higher elevations. A study from Sarkar and Devi (2014) that looked at regeneration and population structure of trees in Hollongapar Gibbon Wildlife Sanctuary in Assam, found that Quercus gemelliflora showed no regeneration in the study period which could be a concern in the future.

Habitats préférentiels (classification IUCN)

  • 1_9Forest - Subtropical/Tropical Moist Montane
Mesures de conservation recommandéesExpert
Recommended conservation actions include protecting logged forests from fire and conversion to plantations. Surveying is recommended to confirm the status and population dynamics of Quercus gemelliflora populations and to determine the presence and severity of additional threats. Quercus gemelliflora is reported to occur in four ex situ collections globally according to BGCI's PlantSearch (BGCI 2019).
Priorités de recherche (3)Expert
  • 1_2Population size, distribution & trends
  • 1_5Threats
  • 3_1Population trends
Niche IUCN globaleExpert

Royaumes biogéographiques

Indomalayan

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

Tree - largeTree - small
Références bibliographiques (7)Expert
  1. IUCN. 2020. The IUCN Red List of Threatened Species. Version 2020-3. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 10 December 2020).
  2. BGCI (Botanic Gardens Conservation International). 2018. PlantSearch online database. Richmond, UK Available at: <a href="www.bgci.org/plant_search.php">www.bgci.org/plant_search.php</a>. (Accessed: 2018).
  3. Gaveau D.L.A., Sloan S., Molidena E., Yaen H., Sheil D., Abram N.K., Ancrenaz M., Nasi R., Quinones M., Wielaard N. and Meijaard E. 2014. Four decades of forest persistence, loss and logging on Borneo. <i>PLoS One</i> 9(7): e101654.
  4. RBG, Kew. 2014. World Checklist of Selected Plant Families (WCSP). Available at: <a href="http://apps.kew.org/wcsp/home.do">http://apps.kew.org/wcsp/home.do</a>.
  5. Sarkar, M. and Devi, A. 2014. Assessment of diversity, population structure and regeneration status of tree species in Hollongapar Gibbon Wildlife Sanctuary, Assam, Northeast India. <i>Society for Tropical Plant Research</i> 1(2): 26-36.
  6. Hélardot, J.-L. 2012. Oaks of The World. Corrèze Available at: <a href="http://oaks.of.the.world.free.fr/">http://oaks.of.the.world.free.fr/</a>.
  7. Menitsky, Y.L. 2005. <i>Oaks of Asia [Translated from Russian]</i>. Science Publishers, Inc., Enfield (NH), USA and Plymouth, UK.
Évaluateurs & contributeurs (3)Expert
assessor
Carrero, C. & Strijk, J.S.
evaluator
Hinsinger, D.D., Robiansyah, I. & Chua, L.S.L.
facilitators
Barstow, M.

Carrero, C. & Strijk, J.S. 2020. Quercus gemelliflora. The IUCN Red List of Threatened Species 2020: e.T78918013A184349244. 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

Consulter sur les bases externes

Observations & statuts

Bibliographie

Note nomenclaturale & synonymesExpert

Note nomenclaturale

TAXREF v18 — INPN/MNHN

Synonymes (12)— redirigent vers cette page

  • Quercus turbinataBlume
  • Cyclobalanopsis gemelliflora(Blume) Oerst.
  • Cyclobalanopsis horsfieldii(Miq.) Oerst.
  • Cyclobalanopsis merkusii(Endl.) Oerst.
  • Cyclobalanopsis turbinata(Blume) Schottky
  • Quercus crassilamellata(Gamble) A.Camus
  • Quercus horsfieldiiMiq.
  • Quercus horsfieldii var. longifoliaMiq.
  • Quercus lineata var. merkusii(Endl.) Wenz.
  • Quercus merkusiiEndl.
  • Quercus semiserrata var. manniiHook.fil.
  • Quercus turbinata var. crassilamellataGamble

Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).