Cycas calcicola 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Cycadaceae

Scientific Name: Cycas calcicola
Species Authority: Maconochie

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Hill, K.D.
Reviewer(s): Donaldson, J.S. & Bösenberg, J.D.
Widespread and abundant. Although some populations have been impacted by collecting and frequent fires, the overall status appears to be Least Concern.
Previously published Red List assessments:
2003 Least Concern (LC)

Geographic Range [top]

Range Description: This species occurs in northern part of the Northern Territory of Australia. Plants are abundant around the Daly River basin and north along the Finniss Range, from Katherine in the southeast to the north of Litchfield Park and near the Daly River Police station, with a somewhat disjunct population in the Spirit Hills on Bullo River station near the Western Australian border. Occurs at low elevations from 123 to 155 m asl.
Countries occurrence:
Australia (Northern Territory)
Number of Locations: 6
Lower elevation limit (metres): 123
Upper elevation limit (metres): 155
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The populations around Katherine are in poor condition due to fire and past uncontrolled collection. However, the larger populations in the Daly River and Litchfield areas appear to be in good condition, though fire effects need to be monitored. Population estimates are: >7,000 for the Daly River; >5,000 for Litchfield Park; >1,500 for Katherine; and >5,000 individuals for Bullo River and Spirit Hills (Parks and Wildlife Commission unpublished data 1994, 1995 and 1996).
Current Population Trend: Stable
Additional data:
Number of mature individuals: 18000-20000
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: C. calcicola grows in sparse, stunted woodland either on or close to limestone. Although originally described from limestone and named accordingly, this species occurs on various often non-calcareous substrates such as sandstones, sandy alluvium and aluminous schists.
Systems: Terrestrial
Generation Length (years): 40

Threats [top]

Major Threat(s): There has been some collecting of specimens from the wild and altered fire frequencies and intensity due to invasive grasses which may impact this species.

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix II of the CITES Appendices. Large numbers of C. calcicola are found in Litchfield National Park and a smaller population is at Kintore Caves Nature Park near Katherine.

Citation: Hill, K.D. 2010. Cycas calcicola. The IUCN Red List of Threatened Species 2010: e.T41989A10595908. . Downloaded on 28 November 2015.
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