Dacrydium nausoriense 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Pinopsida Pinales Podocarpaceae

Scientific Name: Dacrydium nausoriense de Laub.
Taxonomic Source(s): Farjon, A. 2010. A Handbook of the World's Conifers. Koninklijke Brill, Leiden.

Assessment Information [top]

Red List Category & Criteria: Endangered B2ab(i,ii,iii,v) ver 3.1
Year Published: 2016
Date Assessed: 2016-07-29
Assessor(s): Keppel, G., Thomas, N., Cavu, S., Daveta, M., Masau, M., Rivers, M.C., Rokocaucau, M., Tikoca, S., Tutevu, I., Young, E. & Thomas, P.
Reviewer(s): Gardner, M. & Mill, R.
Dacrydium nausoriense is a valuable timber species in Fiji that has been heavily exploited. It has a very restricted distribution  and the estimated area of occupancy is well within the threshold (under 100 km2)for Endangered under criterion B2. It is known from two locations and there is a continuing decline at least in the extent of occurrence, the quality of habitat and the number of mature individuals.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Dacrydium nausoriense is restricted to two locations within Fiji: one in the Nausori Highlands in western Viti Levu and the second at Sarava on Vanua Levu. The estimated area of occupancy is much less than 100 km2.
Countries occurrence:
Additional data:
Estimated area of occupancy (AOO) - km2:99Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:
Continuing decline in extent of occurrence (EOO):Yes
Number of Locations:2
Lower elevation limit (metres):300
Upper elevation limit (metres):600
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Two subpopulations are currently known. On Viti Levu all known stands are within several kilometres of each other and are considered as a single subpopulation within the context of the IUCN Red List Guidelines. The second subpopulation is on Vanua Levu. These two subpopulations constitute two locations. The number of mature individuals is more than 3,400 (Keppel et al. 2015).
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes

Habitat and Ecology [top]

Habitat and Ecology:Grows in  mesic upland forests above 400 m  asl; often associated with regrowth in logged forest, abandoned garden sites or the margins of forest with anthropogenic grassland. The rainfall is less than 2,500 mm per year with a distinct dry season from June to October (Keppel et al. 2015). Reported to be slow growing, especially when young.
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):50

Use and Trade [top]

Use and Trade: Highly valued for timber that is used for general construction and carpentry. It is also used as a Christmas tree.

Threats [top]

Major Threat(s): The primary threats are over-exploitation for timber and loss of habitat due to forest clearance for agriculture and pastoral activities. Other threats, also include the use locally of the tree as a Christmas tree, and for fire wood. Invasive plants and fire are additional threats (Fiji Red List Workshop, July 2016; Keppel et al. 2015).

Conservation Actions [top]

Conservation Actions: Currently this species is not known to occur in any protected areas although some areas within its range have been identified as priority areas for conservation (Olson et al. 2009). There is an urgent need for further field surveys to establish the size of the remaining population, its distribution and status. Dacrydium nausoriense is listed under Schedule 2 of Fiji's Endangered and Protected Species Act (2002) which provides some regulation of its exploitation.

Conservation recommendations for this species include: i) further ex situ collections,  ii) enhancement planting on site and near villages, iii) awareness of land owners and regulatory authorities, and iv) provide alternatives for firewood/Christmas trees. Also further research is needed into ecology, ecosystem services and propagation methods (Fiji Red List Workshop, July 2016).

Citation: Keppel, G., Thomas, N., Cavu, S., Daveta, M., Masau, M., Rivers, M.C., Rokocaucau, M., Tikoca, S., Tutevu, I., Young, E. & Thomas, P. 2016. Dacrydium nausoriense. The IUCN Red List of Threatened Species 2016: e.T31051A99514539. . Downloaded on 26 April 2018.
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