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Dillenia ferruginea

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA MAGNOLIOPSIDA DILLENIALES DILLENIACEAE

Scientific Name: Dillenia ferruginea
Species Authority: (Baill.) Gilg
Synonym/s:
Neowormia ferruginea (Gilg) Hutch. & Summerh.
Wormia ferruginea Baill.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2011
Assessor/s: Ismail, S., Huber, M.J. & Mougal, J.
Reviewer/s: Gibbs, D. & Lutz, M.L.
Contributor/s:
Justification:
Dillenia ferruginea is endemic to the Seychelles, and is found on Mahé, Praslin, Silhouette and Curieuse. It has a very restricted range and the total area of these four islands is 215 km². The species does not seem to be obviously threatened except by its restricted range. It seems to be regenerating well and an increase in abundance over the last century has occurred. It is unlikely that any major threats are going to affect this species in the near future. It is listed as Near Threatened. But even with improved data quality it is unlikely that the species would qualify for criteria A, B or C, as the species is regenerating very good and historical data even indicate an increase in abundance in the last century. An allocation to a higher threat category through specific human activities or stochastic events in the foreseeable future is unlikely.
History:
1998 – Vulnerable (Oldfield et al. 1998)
1998 – Vulnerable
1997 – Rare (Walter and Gillett 1998)

Geographic Range [top]

Range Description: This species is endemic to the Seychelles, and is found on the islands of Mahé, Praslin, Silhouette and Curieuse (Friedmann 1994). The total area of these islands is 215 km² (National Statistics Bureau 2005).

In a survey in 1994, the species was found in 52 out of 73 areas of special conservation value (Carlström 1996). This indicates the broad intra island distribution of the species.
Countries:
Native:
Seychelles (Seychelles (main island group))
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The current population size and trends are unknown. In 1925, D. ferruginea was nearly extinct on Mahé (Dupont 1925) and was planted in several areas in the 1920s. In 1940, almost no big individuals could be found, but smaller individuals were relatively common (Vesey-Fitzgerald 1940). Presently, the species is still relatively wide spread in drier areas from near sea level to mountaintops. It seams that the species has recovered during the past 100 years. A past or future decline cannot be quantified.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Tree up to 20 m tall, occurring in mountain woods and exposed rocky outcrops. The fruit is eaten and probably dispersed by frugivores.
Systems: Terrestrial

Threats [top]

Major Threat(s): This species is not thought to be threatened at present. Its restricted range, the invasion of alien species (affecting the quality of its habitat) and insect pests are potential threats that are unlikely to affect this species presently. It was used for rafters and posts in the construction of house, but is not used any more.

Conservation Actions [top]

Conservation Actions: The species is present in Morne Seychellois and Praslin National Parks and also in the Curieuse Marine National Park.
Citation: Ismail, S., Huber, M.J. & Mougal, J. 2011. Dillenia ferruginea. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 25 May 2013.
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