Caladenia attenuata
(Brinsley) D.L.Jones
Pays · région · aire protégée · écorégion · biome
Pas d'interactions documentées pour cette espèce.
Liste rouge IUCN
CR · En danger critiquecritères B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v); C2a(i,ii); D↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- – m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
The population size for Caladenia attenuata is unknown, but the results from the most recent survey (2012) suggest the population size could be as low as zero or one. At known sites, some plants may remain below ground as dormant tubers or there may be seed in a soil seed bank. Surveys in 2012 were unable to confirm the presence of C. attenuata at any historical location despite favourable growth conditions for terrestrial orchids.
The NSW Scientific Committee (2014) state that “The number of mature individuals of terrestrial orchids will fluctuate depending on seasonal conditions and disturbance history. In 1964, at the type locality, Brinsley (1968) reported ‘considerable numbers of flowering specimens were seen over a fairly restricted area’. Recent searches of both the type locality and another site along with other surrounding potentially suitable habitat have failed to confirm the species, even though searches were conducted within the known flowering season, conditions were favourable for detecting terrestrial orchids and other Caladenia spp. were readily located (Auld and Fleming in litt. 2013). During this survey, one individual Caladenia specimen from near Ilford may be attributable to C. attenuata, but more material is needed to resolve this. Hence, the total population size for C. attenuata is inferred to be extremely low.”
The NSW Scientific Committee (2014) state that “The number of mature individuals of terrestrial orchids will fluctuate depending on seasonal conditions and disturbance history. In 1964, at the type locality, Brinsley (1968) reported ‘considerable numbers of flowering specimens were seen over a fairly restricted area’. Recent searches of both the type locality and another site along with other surrounding potentially suitable habitat have failed to confirm the species, even though searches were conducted within the known flowering season, conditions were favourable for detecting terrestrial orchids and other Caladenia spp. were readily located (Auld and Fleming in litt. 2013). During this survey, one individual Caladenia specimen from near Ilford may be attributable to C. attenuata, but more material is needed to resolve this. Hence, the total population size for C. attenuata is inferred to be extremely low.”
Menaces identifiées(6 menaces classées CMP-IUCN)
2_3_3Agro-industry grazing, ranching or farmingOngoing8_1_1Unspecified speciesOngoing8_1_2Named speciesOngoing8_1_2Named speciesOngoing8_1_2Named speciesOngoing8_1_2Named speciesOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
NSW Scientific Committee (2014) state that “Both recorded localities for Caladenia attenuata are subject to grazing by stock and rabbits and competition from herbaceous weeds such as Melilotus sp., Hypochaeris radicata and Sonchus oleraceus (Auld and Fleming in litt. 2013).” None of the known sites are within a reserve managed for conservation.
Habitats préférentiels (classification IUCN)
1_4Forest - Temperate★
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed as Critically Endangered under the Australian Government Environment Protection and Biodiversity Conservation Act 1999.
The main conservation action (within the NSW Government Saving our Species program) is to conduct targeted survey for the species in suitable habitat surrounding historical occurrences to assess abundance, distribution and likely threats.
Recovery Plan
A recovery plan for this species is not recommended, because the approved Conservation Advice (TSSC 2018) provides sufficient direction to implement priority actions and mitigate against key threats. The relevant state/territory may decide to develop a plan under its equivalent legislation.
Conservation and Management Actions (from Conservation Advice)
Habitat loss, disturbance and modification
Invasive species
Ex situ conservation
Stakeholder management
Information and Research Priorities
Survey and Monitoring priorities
Information and Research priorities
The primary focus is confirming the presence of any C. attenuata individuals, securing known populations, and managing the known sites to promote the continuing persistence of the species. Key research areas include:
The main conservation action (within the NSW Government Saving our Species program) is to conduct targeted survey for the species in suitable habitat surrounding historical occurrences to assess abundance, distribution and likely threats.
Recovery Plan
A recovery plan for this species is not recommended, because the approved Conservation Advice (TSSC 2018) provides sufficient direction to implement priority actions and mitigate against key threats. The relevant state/territory may decide to develop a plan under its equivalent legislation.
Conservation and Management Actions (from Conservation Advice)
Habitat loss, disturbance and modification
- Protect the two sites where Caladenia attenuata has historically been recorded.
- Remove grazing during the spring flowering season (October–November).
- Consider fencing sites against domestic stock and rabbits.
- Prevent soil disturbance and damage to C. attenuata tubers.
- Eradicate weeds/controls weeds and maintain at low densities - to minimise competition with C. attenuata.
Invasive species
- Remove grazing during the spring flowering season (October–November).
- Consider fencing sites against domestic stock and rabbits.
- Eradicate weeds/control weeds and maintain at low densities - to minimise competition with C. attenuata.
Ex situ conservation
- Develop a targeted seed collection program for ex situ seed banking (if possible without negatively impacting the wild population).
Stakeholder management
- Inform land owners and managers of sites where there are known populations and consult with these groups regarding options for conservation management and protection of the species.
Information and Research Priorities
Survey and Monitoring priorities
- Survey to confirm the presence of this species at any location is critically important. Conduct targeted and repeated surveys during October–November at (and in the vicinity of) the historical sites.
- Monitor known sites to assess any changes to above ground population abundance.
Information and Research priorities
The primary focus is confirming the presence of any C. attenuata individuals, securing known populations, and managing the known sites to promote the continuing persistence of the species. Key research areas include:
- determining pollinators and mycorrhizal associations to aid in conservation in the wild and potential development of an ex situ population;
- understanding the impact of grazers on plant survival and growth
- understanding what factors drive annual fluctuation in above ground abundance.
Actions de conservation (5)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection2_1Site/area management2_2Invasive/problematic species control3_4_2Genome resource bank4_3Awareness & communications
Stress écologiques (10)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_3_2Competition2_3_2Competition2_3_2Competition
Priorités de recherche (5)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_5Threats3_1Population trends4Other
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Australasian
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
Forb or HerbGeophyte
Références bibliographiques (6)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2022. The IUCN Red List of Threatened Species. Version 2022-2. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 08 December 2022).
- Threatened Species Scientific Committee (TSSC). 2018. Conservation Advice <i>Caladenia attenuata</i> (Duramana fingers). Department of the Environment and Energy, Canberra. Available at: <a href="http://www.environment.gov.au/biodiversity/threatened/species/pubs/87595-conservation-advice-11052018.pdf">http://www.environment.gov.au/biodiversity/threatened/species/pubs/87595-conservation-advice-11052018.pdf</a>. (Accessed: 2021).
- NSW Office of Environment and Heritage (OEH). 2014. Threatened species profile: <i>Caladenia attenuata</i>. Available at: <a href="http://www.environment.nsw.gov.au/threatenedspeciesapp/profile.aspx?id=20276">http://www.environment.nsw.gov.au/threatenedspeciesapp/profile.aspx?id=20276</a>. (Accessed: 2017).
- NSW Scientific Committee. 2014. Final Determination to list <i>Caladenia attenuata</i> as Critically Endangered Species. Available at: <a href="http://www.environment.nsw.gov.au/resources/threatenedspecies/determinations/FDCalaattenCR. pdf">http://www.environment.nsw.gov.au/resources/threatenedspecies/determinations/FDCalaattenCR. pdf</a>. (Accessed: 2017).
- Burndrett, M.C. 2007. Scientific approaches to Australian temperate terrestrial orchid conservation. <i>Australian Journal of Botany</i> 55: 293-307.
- Brinsley, W. 1968. A new variety of <i>Caladenia carnea</i> R. Br. <i>The Orchadian</i> 3: 16.
Évaluateurs & contributeurs (4)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Australian Government, Threatened Species Scientific Committee
evaluator
Rankou, H. & Zimmer, H.
facilitators
Mastroanni, E. & Zimmer, H.
institutions
Australian Government, Threatened Species Scientific Committee
Australian Government, Threatened Species Scientific Committee 2022. Caladenia attenuata. The IUCN Red List of Threatened Species 2022: e.T206711678A206712804. Accessed on 05 May 2026.
Répartition mondiale
Aucune observation géoréférencée avec précision suffisante (<10 km) dans GBIF pour cette espèce.
Consulter sur les bases externes
Observations & statuts
Cartographie
Note nomenclaturale & synonymesDétails taxonomiques + synonymes CoLExpert
Note nomenclaturale
TAXREF v18 — INPN/MNHNSynonymes (2)— redirigent vers cette page
- Caladenia carnea var. attenuataBrinsley
- Petalochilus attenuatus(Brinsley) D.L.Jones & M.A.Clem.
Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).