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Jasminum noumeense 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_onStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Scrophulariales Oleaceae

Scientific Name: Jasminum noumeense Schltr.

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2ce; B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2010
Date Assessed: 2007-05-15
Assessor(s): Hequet, V.
Reviewer(s): Pollock, C.M. & Hilton-Taylor, C.
Justification:
Jasminum noumeense has an extent of occurrence (EOO) of 3,789 km2 and an area of occupancy (AOO) of 44 km2. The species is endemic to New Caledonian dry forests (including calcareous forests) and it is known from nine locations, most of them from Noumea and identified through collections dating from 1855 to 1977. All collections made after this date are from Baie de Tina. Its habitat is among the most threatened in New Caledonia. Dry forests have been reduced dramatically, both in size and in quality. They have been intensively cut for agricultural purposes over the last century and what remains today are highly fragmented patches that suffer intense predation by the introduced Rusa Deer (Rusa timorensis) and uncontrolled fires. Reduction of habitat has been estimated at 95% over the last 150 years (Bouchet 1995) and degradation continues today. Given the dramatic reduction of the habitat, especially in the Noumea area, and no recent collections of the species, it is suspected that most of Noumea's locations have now disappeared. Generation length is not known for this species, but with the evidence of large declines in dry forest over the last 150 years, it is likely that the species has declined by at least 30% over the past three generations; it may even have declined by at least 50%, but further research is needed to confirm this.

Geographic Range [top]

Range Description:This species is endemic to New Caledonia. It is mostly found in Noumea, but there are also some isolated collections in Prony, Bourail, Poya and Pouembout. Distances between known sites are (respectively and from south to north) 50, 127, 32 and 38 km. Its total extent of occurrence is 3,789 km2, and its estimated area of occupancy within this range is 44 km2.
Countries occurrence:
Native:
New Caledonia
Additional data:
Estimated area of occupancy (AOO) - km2:44
Number of Locations:9
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Population size is unknown. In suitable habitat the species can be common. It is recorded from several locations around Noumea. However, the most recent of those collections was in 1968 for Noumea and 1984 for Baie de Tina, a little away from the Noumea urban zone. Therefore it is suspected that the species has disappeared from most of the urban locations.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is endemic to New Caledonian dry forests (including calcareous forests). Tropical dry forests are probably among the world’s most endangered of all lowland tropical forests. Because of their propensity to become pastures and their susceptibility to fire, dry forests have reduced dramatically, in size as well as in quality. In New Caledonia, they’ve been intensively cut for agricultural purposes for a century; what remains today are highly fragmented patches that have been estimated at 2% of the original area. Dry forests used to be common around Noumea. In fact, numerous old herbarium collections of dry forest plant species are from Noumea and its suburbs. However, intense urbanization, developing human activities and repeated fires have nearly eradicated this habitat.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): The major threat is lowland clearing for cattle grazing and agriculture, which began in the 1850s and is ongoing. Another threat comes from the Rusa Deer (Rusa timorensis), which was introduced in the 1880s and adapted extremely well to the Caledonian habitats. Its population may have reached 105,000–110,000 individuals in the wild. This deer consumes a wide variety of plant species and also causes severe damage to trees by rubbing antlers against tree stems. The third major threat is uncontrolled fires that sweep across lowlands of New Caledonia each year during the dry season and have slowly transformed remnant patches of dry forest into shrubland dominated by Acacia spirorbis and Leucaena leucocephala, or Niaouli (Melaleuca quinquenervia) savannas. Jasminum noumeense used to be common around Noumea but intense urbanization, developing human activities and repeated fires around the city have considerably reduced its potentially available habitats and it is suspected that many old locations, known from herbarium collections, have now disappeared.

Conservation Actions [top]

Conservation Actions: Present in two protected areas.

Citation: Hequet, V. 2010. Jasminum noumeense. The IUCN Red List of Threatened Species 2010: e.T177846A7468792. . Downloaded on 21 November 2017.
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