Costus zamoranus
Steyerm.
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Costus zamoranus.
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
- 2015 · v3.1
- Altitude
- 900 – 1700 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
During the February 2015 field work, population counts were taken at all sites where the species was found. Most localities had only one to three plants growing and there were only nine sites where the species was found. A total of 33 plants were observed at these nine sites. There were many other localities visited where the species might be expected but none were found. Marco Jiménez Villalta, who lives in Zamora and has been exploring the forests of the region for over 20 years, knows Costaceae very well, but does not recall seeing this species in other places. Based on his knowledge of the plants of the region and the observations by this assessor in February 2015, the total population size is estimated at no more than 200 mature individual plants.
Based on the small isolated subpopulations that were observed and the many other surrounding localities that were searched and were lacking this species, this total population should be considered as severely fragmented.
The population size is estimated to be decreasing at a rate of about 10% per 24 year period (three generation lengths past, present and future) due to loss of habitat.
Based on the small isolated subpopulations that were observed and the many other surrounding localities that were searched and were lacking this species, this total population should be considered as severely fragmented.
The population size is estimated to be decreasing at a rate of about 10% per 24 year period (three generation lengths past, present and future) due to loss of habitat.
Menaces identifiées(2 menaces classées CMP-IUCN)
2_1_2Small-holder farmingSlow, Significant DeclinesMinority (<50%)Ongoing2_3_2Small-holder grazing, ranching or farmingSlow, Significant DeclinesMinority (<50%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The primary threat is habitat loss, as described for the locality in Canton Limon-Indanza where this species was once found in forest remnants between pastures and where the area is used for subsistence farming. During the 2015 field work, it was found that deforestation is continuing in the region of the type locality, with a new paved highway nearly completed as far south as Zumba. In the previous assessment (Skinner 2014) it was suspected that the species might be present in the protected area of the Podocarpus National Park and in a sparsely settled area of mountainous terrain between Valladolid and Zamora, but this now seems less likely as we (D. Skinner, M. Jiménez Villalta and M. Jiménez León) did not find it in the northern part of the park or in the Alto Numbami area which has good forest at similar elevations. The only protected area where we (D. Skinner, M. Jiménez Villalta and M. Jiménez León) saw plants presumed to be this species is the Reserva Maycu which is across the Rio Nangaritza in the Cordillera del Cóndor. As noted earlier, the plants found here are of a different form from the ones at the type locality.
Habitats préférentiels (classification IUCN)
1_9Forest - Subtropical/Tropical Moist Montane★
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
Currently there are no known conservation actions in place for this species, in situ or ex situ. Seeds and stem cuttings or rhizome divisions should be taken from both colour forms found at the type locality and also from the form at the Reserva Maycu locality, then placed and monitored in the dedicated conservation area that is already established near the ranger station of the Podocarpus National Park which is located within the extent of occurrence (EOO) near the town of Zamora. Ex situ conservation of these forms in botanical gardens should also be undertaken as a backup. Seeds of all forms of the species should also be deposited in genebanks to preserve the genetic diversity.
Actions de conservation (4)Conservation Actions Classification Scheme — IUCNExpert
3_2Species recovery3_4_1Captive breeding/artificial propagation3_4_2Genome resource bank4_3Awareness & communications
Stress écologiques (4)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation
Priorités de recherche (3)Research Needed Classification — IUCNExpert
1_1Taxonomy1_2Population size, distribution & trends3_1Population trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Neotropical
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
Geophyte
Références bibliographiques (6)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2015. The IUCN Red List of Threatened Species. Version 2015-4. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 19 November 2015).
- Skinner, D. and Jiménez León, M. 2015. <i>Costus zamoranus</i>: An endemic species to Zamora-Chinchipe Province in Southeastern Ecuador. <i>Bulletin of the Heliconia Society International</i> 21(3): 4-9.
- Skinner, D. 2014. <i>Costus zamoranus</i>. The IUCN Red List of Threatened Species 2014. e.T45121A56352574. Available at: <a href="http://dx.doi.org/10.2305/IUCN.UK.2014-1.RLTS.T45121A56352574.en">http://dx.doi.org/10.2305/IUCN.UK.2014-1.RLTS.T45121A56352574.en</a>. (Accessed: 30 September 2015).
- Maas, P.J.M. 1977. <i>Flora Neotropica Monograph No. 18 Renealmia (Zingiberaceae - Zingiberoideae), Costoideae (Additions) (Zingiberaceae)</i>. New York Botanical Garden, New York.
- Maas, P.J.M. 1972. <i>Flora Neotropica Monograph No. 8, Costoideae (Zingiberaceae)</i>. Hafner Publishing Company, Inc., New York.
- Steyermark, J.A. 1963. <i>Costus zamoranus</i>, sp. nov. <i>Phytologia</i> 9(6): 339.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Skinner, D.
contributor
Pitman, N.C., Ulloa Ulloa, C. & Magos Brehm, J.
evaluator
Magos Brehm, J.
Skinner, D. 2015. Costus zamoranus. The IUCN Red List of Threatened Species 2015: e.T45121A69569762. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s