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Syzygium pendulinum 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Myrtales Myrtaceae

Scientific Name: Syzygium pendulinum J.W. Dawson

Assessment Information [top]

Red List Category & Criteria: Endangered 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:
Syzygium pendulinum has an extent of occurrence (EOO) of 7.4 km² and an area of occupancy (AOO) of 0.86 km². It is known from two locations and its largest subpopulation is located on a private land with a large population of introduced Rusa Deer (Cervus timorensis russa). It is endemic to New Caledonian dry forests and its habitat is among the most threatened in the country; dry forests have been reduced dramatically, both in size and quality. They have been intensively cut for agricultural purposes over the last century and what remains today are highly fragmented patches that suffer severe predation by Rusa Deer and uncontrolled fires. The reduction of the habitat has been estimated at 95% over the last 150 years (Bouchet 1995) and this degradation continues today.

Geographic Range [top]

Range Description:This species is endemic to New Caledonia. It is restricted to two small patches of residual dry forest, 5 km apart, located on private lands in Paita region. One site is in Pointe Maa peninsula; the other is in Gadji Bay. Its total extent of occurrence is 7.4 km², and its estimated area of occupancy within this range is 0.86 km².
Countries occurrence:
Native:
New Caledonia
Additional data:
Estimated area of occupancy (AOO) - km2:0.86
Number of Locations:2
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The total population size is unknown. In Pointe Maa, the species is locally common and the subpopulation of adult trees may form several tenths of adults in the global population. However, there is very little regeneration due to intense predation by Rusa Deer (Cervus timorensis russa). The Gadji subpopulation is not known; the species has been referred to only once from that site.
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. 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.
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 (Cervus timorensis russa), 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.

Conservation Actions [top]

Conservation Actions: The largest subpopulation is located on a private land. The Programme de Conservation des Forêts Sèches de Nouvelle Calédonie (PCFS) is actively working on this site. It has already financed a fence, restoration of a two-hectare plot is being achieved and many scientific studies are done on this site. Still the impact of Rusa Deer (Cervus timorensis russa) is very high on the site and the restoration process is still in its initial stages.

Citation: Hequet, V. 2010. Syzygium pendulinum. The IUCN Red List of Threatened Species 2010: e.T177857A7470858. . Downloaded on 21 November 2017.
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