Cycas conferta 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Cycadaceae

Scientific Name: Cycas conferta
Species Authority: Chirgwin ex Chirgwin & Wigston

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Ottley, H.
Reviewer(s): Donaldson, J.S. & Bösenberg, J.D.
Originally classified as Vulnerable based on its limited distribution and ongoing decline, as well as its small overall population size and estimated decline of >10% over the past 50 years. However, current information indicates that the extent of occurrence and area of occupancy are larger than originally estimated. Therefore classified as Near Threatened (almost qualifies for threatened listing under criterion B1+2 and C1).
Previously published Red List assessments:
2003 Vulnerable (VU)
1998 Vulnerable (V)

Geographic Range [top]

Range Description: This species occurs in the Northern Territory of Australia. Populations are found from between Jim Jim Falls and Graveside Gorge in the Kakadu National Park, southwest through Goodparla and Mary River Station to Foelsche Headland, and north to Burrell Creek near Adelaide River. A large population of C. conferta has been reported near the headwaters of the Fergusson River, but as yet has not been confirmed.
Countries occurrence:
Australia (Northern Territory)
Number of Locations: 8-10
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The distribution of this species is considered to be sporadic and local in occurrence, with plants forming isolated, usually small but dense, stands. The population estimates exceed 30,000 plants with a major concentration at Harriet Creek.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 30000-35000
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: C. conferta occurs on sandy soils over granites or coarse sandstones. In association with Eucalyptus and grasses. Populations are found mainly on rocky outcrops and stunted woodland overlying Cullen granite and sandstone and quartz of the Brocks Creek Group. The soils are grey gravelly loams. Eucalyptus miniata is the dominant tree species in the woodland whereas the cycads are dominant on the outcrops.
Systems: Terrestrial
Generation Length (years): 40

Threats [top]

Major Threat(s): In the past, the large population at Harriet Creek has been extensively harvested for seed. Some of the smaller populations along the Kakadu Highway have been severely impacted by past removal of plants. However, because of the large numbers over a substantial area, the species is not presently at risk.

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix II of the CITES Appendices. Some stands are conserved within Kakadu National Park.

Citation: Ottley, H. 2010. Cycas conferta. The IUCN Red List of Threatened Species 2010: e.T41958A10611773. . Downloaded on 26 November 2015.
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