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Podocarpus steyermarkii

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA PINOPSIDA PINALES PODOCARPACEAE

Scientific Name: Podocarpus steyermarkii
Species Authority: J.T.Buchholz & N.E.Gray

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2013
Date Assessed: 2011-07-05
Assessor(s): Farjon, A.
Reviewer(s): Thomas, P.
Justification:
The extent of occurrence is very large, but the area of occupancy, even when undiscovered localities are postulated (by using a grid width of 5 km, larger than the areas most individual subpopulations occupy) falls within the threshold for Endangered. However, with some exceptions in northern Venezuela, most of the known subpopulations are in remote ‘tepuis’ localities (some within protected areas) and there are no known threats to these. Podocarpus steyermarkii is therefore assessed as Least Concern.

Geographic Range [top]

Range Description: Recorded from Guyana: Pakaraima Mts.; and Venezuela: Bolivar (Carrao-tepui, Uaipan-tepui, Cerro Jaua), Amazonas (Neblina Massif).
Countries:
Native:
Guyana; Venezuela, Bolivarian Republic of
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Although rare and scattered, this species forms small but presumably stable subpopulations, mainly situated on the tepuis or ‘table mountains’ remote from human interference.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: Podocarpus steyermarkii is a rare species occurring on the upper slopes and summits of the tepuis (table mountains) of Guyana and Venezuela. Its altitudinal range, as known from as yet limited collections in herbaria, is from 1,850 m to 2,430 m a.s.l. This species has now been found in cloud forest with a canopy to 20-25 m tall, as well as in low herbaceous or scrub vegetation in areas with blanket bogs with grasses, ferns, pitcher plants, orchids, mosses, and low scattered shrubs to 1.5 m tall, interspersed with thickets and dwarf forest including palms. Here the podocarps (P. roraimae and P. tepuiensis also occur in this habitat) occur mostly in the dwarf forest patches along small streams, which are the sources of large river systems. The substrate is acidic peat or peaty forest soil over sandstone. Levels of precipitation are very high and there is frequent, long lasting fog (clouds surrounding the tepuis), causing low temperatures in the daytime.
Systems: Terrestrial

Use and Trade [top]

Use and Trade: No uses have been recorded of this species and it is not known to be in cultivation.

Threats [top]

Major Threat(s): This species, which was described and known from only a single locality in 1948, is still known from only six or seven localities. It is likely to turn up in more places with continuing botanical surveys, but is obviously scattered and uncommon. Its total area of occupancy (AOO) is almost certainly less than 500 km2, but it is not exploited, nor are the forest patches in which it occurs threatened by deforestation. This species is therefore considered to be outside any category of threat.

Conservation Actions [top]

Conservation Actions: This species occurs in several protected areas.

Citation: Farjon, A. 2013. Podocarpus steyermarkii. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 22 August 2014.
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