Cryptocoryne nevillii
Trimen
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cryptocoryne nevillii.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
EN · En dangercritères B1ab(iii)+2ab(iii)?Inconnue- Évaluation
- 2023 · v3.1
- Altitude
- 0 – 50 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
There is no information on population size or trends in this species. However, it is scarce, even within known sites as surveys have often failed to find plants.
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%)Ongoing1_3Tourism & recreation areasVery Rapid DeclinesMajority (50-90%)Ongoing2_4_2Industrial aquacultureVery Rapid DeclinesMajority (50-90%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
This species is threatened by factors which affect coastal habitat throughout much of the world. It is directly threatened by the effects of development of tourist facilities and by conversion of coastal wetlands to aquaculture, as well as the secondary effects of these factors, such as hyper-eutrophication of coastal wetlands and casual habitat degradation of coastal habitats due to recreational use.
Habitats préférentiels (classification IUCN)
13_5Marine Coastal/Supratidal - Coastal Freshwater Lakes★5_1Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)★15_9Artificial/Aquatic - Canals and Drainage Channels, Ditches
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
There are no direct conservation measures in place for this species and it is not known from any protected areas. Some degree of protection may be provided by the potential for unexploded ordnance to still occur in some of the areas from which it has been recorded. It was classed as EN (B2ab(i,ii,iii)) by Yakandawala (2012).
There is an urgent need for surveys to assess the conservation condition of all known subpopulations, combined with work to establish protection for habitats where possible.
There is an urgent need for surveys to assess the conservation condition of all known subpopulations, combined with work to establish protection for habitats where possible.
Actions de conservation (4)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection1_2Resource & habitat protection3_1_1Harvest management3_1_2Trade management
Stress écologiques (10)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality
Usage & commerce (1)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnational
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 (7)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).
- Bastmeijer, J.D. 2020. Crypts pages: <i>Cryptocoryne nevillii</i>. Available at: <a href="https://crypts.home.xs4all.nl/Cryptocoryne/Gallery/nev/nev.html">https://crypts.home.xs4all.nl/Cryptocoryne/Gallery/nev/nev.html</a>.
- 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.
- Babics, P. 2011. <i>Cryptocoryne nevillii</i> Trimen ex Hook.f., eine (fast) vergessene Raritat aus Sari Lanka. <i>Aqua Planta</i> 36(3): 90-95.
- Jacobsen, N. 1987. <i>Cryptocoryne</i>. In: M.D. Dassanyake and F.R. Forsberg (eds), <i>A revised Handbook to the Flora of Ceylon</i>, pp. 85-99.
- 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.
- Jacobsen, N. 1976. Notes on <i>Cryptocoryne</i> of Sri Lanka (Ceylon). <i>Botaniska Notiser</i> 129: 179-190.
Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Lansdown, R.V.
evaluator
Jacobsen, N. & Yakandawala, D.M.D.
Lansdown, R.V. 2023. Cryptocoryne nevillii. The IUCN Red List of Threatened Species 2023: e.T175654238A175654254. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s