Cryptocoryne bogneri
Rataj
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cryptocoryne bogneri.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
EN · En dangercritères B1ab(ii,iii,v)+2ab(ii,iii,v); D↘Décroissante- Évaluation
- 2023 · v3.1
- Altitude
- 60 – 270 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
This is considered to be one of the most threatened Cryptocoryne species in Sri Lanka as it is known from a small number of subpopulations involving only a few plants (c.200 individuals) in total. The type locality was visited in 2003 and was considered to be unchanged from the original visit in 1973 (Kasselmann 2020). However, a declining population trend and a continuing decline in the number of mature individuals is inferred from the continuing decline in habitat quality and area.
Menaces identifiées(5 menaces classées CMP-IUCN)
5_2_1Intentional use (species is the target)UnknownUnknownOngoing9_3_1Nutrient loadsSlow, Significant DeclinesMajority (50-90%)Ongoing9_3_2Soil erosion, sedimentationSlow, Significant DeclinesMajority (50-90%)Ongoing2_1_2Small-holder farmingVery Rapid DeclinesMajority (50-90%)Ongoing2_3_2Small-holder grazing, ranching or farmingVery Rapid DeclinesMajority (50-90%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
While some of the sites from which this species is known are in well-forested, upland areas, others are in lowland areas which have little remaining natural habitat. All of the sites where it occurs are threatened by deforestation and the secondary effects of forest degradation, such as increased turbidity in flowing waters. It is highly threatened by collection.
Habitats préférentiels (classification IUCN)
15_9Artificial/Aquatic - Canals and Drainage Channels, Ditches★5_1Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)★
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
There are no conservation measures in place specifically for this species. It is not known to occur in any protected areas. It was classed as CR (B1ab(i,ii,iii)+2ab(i,ii,iii)) by Yakandawala (2012).
Actions de conservation (2)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection3_1_1Harvest management
Stress écologiques (9)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality
Usage & commerce (1)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternational
Priorités de recherche (3)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_5Threats3_1Population trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Indomalayan
Systèmes (terrestre/eau douce/marin)
Freshwater (=Inland waters)
Formes de croissance
Forb or HerbHydrophyte
Références bibliographiques (4)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2023. The IUCN Red List of Threatened Species. Version 2023-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 07 December 2023).
- Kasselmann, C. 2020. <i>Aquarium Plants</i>. Aquarium Plants Publisher, Teltow.
- Yakandawala, D. 2012. Present Status of Fresh Water Aquatic Flora in Sri Lanka. In: D.K. Weerakoon and S. Wijesundara (eds), <i>The National Red List 2012 of Sri Lanka; Conservation Status of the Fauna and Flora</i>, pp. 186-196. Ministry of Environment, Colombo.
- Graaf, A. de and Arends, J.C. 1986. The occurrence of <i>Cryptocoryne</i> and <i>Lagenandra</i> (Araceae) on Sri Lanka. <i>Nordic Journal of Botany</i> 6: 757-764.
Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Lansdown, R.V.
evaluator
Yakandawala, D.M.D. & Jacobsen, N.
Lansdown, R.V. 2023. Cryptocoryne bogneri. The IUCN Red List of Threatened Species 2023: e.T175651339A175651343. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s