Cryptocoryne dewitii
N.Jacobsen
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cryptocoryne dewitii.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
CR · En danger critiquecritères B1ab(iii,v)+2ab(iii,v)↘Décroissante- Évaluation
- 2023 · v3.1
- Altitude
- 40 – 40 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
From the available information the population is large, however the condition of surrounding areas would suggest that there is likely to be an ongoing decline in the size of the population.
Menaces identifiées(2 menaces classées CMP-IUCN)
3_2Mining & quarryingSlow, Significant DeclinesWhole (>90%)Future1_1Housing & urban areasVery Rapid DeclinesWhole (>90%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
Lowland forest throughout Papua New Guinea is heavily threatened by clearance, the secondary effects of clearance and urbanisation. The area supporting this species is also threatened by ongoing deforestation and expansion of mining operations.
Habitats préférentiels (classification IUCN)
5_7Wetlands (inland) - Permanent Freshwater Marshes/Pools (under 8ha)★
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
There are no conservation measures in place for this species. There is an urgent need for surveys to document the known population as well as to investigate wetland habitats in surrounding areas to try to find more extant populations.
Actions de conservation (1)Conservation Actions Classification Scheme — IUCNExpert
1_2Resource & habitat protection
Stress écologiques (5)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation2_1Species mortality2_1Species mortality
Usage & commerce (1)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternational
Priorités de recherche (5)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_5Threats1_6Actions3_1Population trends3_4Habitat 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 (5)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 dewitii</i>. Available at: <a href="https://crypts.home.xs4all.nl/Cryptocoryne/Gallery/dew/dew.html">https://crypts.home.xs4all.nl/Cryptocoryne/Gallery/dew/dew.html</a>.
- Idei, T. 2010. Der natürliche Standort von <i>Cryptocoryne dewitii</i> N. Jacobsen (Araceae) in Papua Neuguinea. <i>Aqua Planta</i> 35(1): 23-28.
- Leach, G.J. and Osborne, P.L. 1985. <i>Freshwater plants of New Guinea</i>. University of Papua New Guinea Press, Port Moresby.
- Jacobsen, N. 1977. <i>Cryptocoryne dewitii</i> N. Jacobsen sp.nov. (Araceae). <i>Botaniska Notiser</i> 130(381-382).
Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Lansdown, R.V.
evaluator
Jacobsen, N.
Lansdown, R.V. 2023. Cryptocoryne dewitii. The IUCN Red List of Threatened Species 2023: e.T175652357A175652363. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s