Cryptocoryne walkeri
Schott
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cryptocoryne walkeri.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
EN · En dangercritères B2ab(iii)?Inconnue- Évaluation
- 2023 · v3.1
- Altitude
- 155 – 460 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
There is no information on the population size or trend of this species. However, there have been no or few confirmed records in recent years and the status of the previously known subpopulations is not certain.
Menaces identifiées(7 menaces classées CMP-IUCN)
7_2_10Large damsRapid DeclinesMinority (<50%)Ongoing5_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_1Housing & urban areasVery Rapid DeclinesMinority (<50%)Ongoing1_2Commercial & industrial areasVery Rapid DeclinesMinority (<50%)Ongoing2_1_2Small-holder farmingVery Rapid DeclinesMajority (50-90%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The habitats and sites where this species occurs are threatened by factors which affect all plants occurring in flowing water bodies in the region, notably forest clearance, urbanisation, agricultural intensification and the secondary effects of these factors, particularly increased turbidity, pollution and casual habitat degradation. Although this species will survive conversion of springs into brick-walled basins and clearance of forest, it will always be vulnerable to intensification of these systems.
Habitats préférentiels (classification IUCN)
5_1Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)★5_9Wetlands (inland) - Freshwater Springs and Oases★
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
There are no conservation actions in place specifically for this species and it is not known from any protected areas. It was classed as CR (B1ab(i,ii,iii)+2ab(i,ii,iii)) by Yakandawala (2012).
There is an urgent need to survey all known subpopulations to derive an up-to-date assessment of the conservation status of known subpopulations.
There is an urgent need to survey all known subpopulations to derive an up-to-date assessment of the conservation status of known subpopulations.
Actions de conservation (3)Conservation Actions Classification Scheme — IUCNExpert
1_2Resource & habitat protection3_1_1Harvest management3_1_2Trade management
Stress écologiques (15)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality2_3_7Reduced reproductive success
Usage & commerce (2)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnational16Establishing ex-situ production *internationalnational
Priorités de recherche (4)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_5Threats3_1Population trends3_3Trade 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 (6)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 walkeri</i>. Available at: <a href="https://crypts.home.xs4all.nl/Cryptocoryne/Gallery/wal/wal.html">https://crypts.home.xs4all.nl/Cryptocoryne/Gallery/wal/wal.html</a>.
- Wijesundara, D.S.A. and Shantha Siri, J.G. 2004. Some Selected Aquatic Ornamental Plants of Sri Lanka. A simplified guide to identification of <i>Aponogeton</i> (Kekatiya) <i>Lagenandra</i> (Ketala) and <i>Cryptocoryne</i> (Atiudayan). Technology Watch Centre (TWC) and National Science Foundation (NSF), Colombo.
- 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 walkeri. The IUCN Red List of Threatened Species 2023: e.T175657572A175657582. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
Consulter sur les bases externes
Note nomenclaturale & synonymesDétails taxonomiques + synonymes CoLExpert
Note nomenclaturale
TAXREF v18 — INPN/MNHNSynonymes (5)— redirigent vers cette page
- Cryptocoryne legroide Wit
- Cryptocoryne luteaAlston
- Cryptocoryne lutea var. minorAlston
- Cryptocoryne walkeri var. legroi(de Wit) Rataj
- Cryptocoryne walkeri var. lutea(Alston) Rataj
Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).