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Callerya neocaledonica 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Fabales Leguminosae

Scientific Name: Callerya neocaledonica
Species Authority: I.C. Nielsen & Veillon

Assessment Information [top]

Red List Category & Criteria: Critically Endangered (Possibly Extinct) A2ce; B1ab(iii)+2ab(iii); D ver 3.1
Year Published: 2010
Date Assessed: 2007-05-15
Assessor(s): Hequet, V.
Reviewer(s): Pollock, C.M. & Hilton-Taylor, C.
Justification:
Callerya neocaledonica is endemic to New Caledonia, where it is the only representative of its genus, it is known from a single location where it was collected only once in 1992. It has never been seen since and its fruits are still unknown. It has an extent of occurrence (EOO) and area of occupancy (AOO) of 3 km². Its habitat is among the most threatened of New Caledonia; 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 intense predation by the introduced Rusa Deer (Cervus timorensis russa) and uncontrolled fires. The reduction of this habitat has been estimated at 95% over the last 150 years (Bouchet 1995) and this degradation continues today. From this it is suspected that a population reduction of at least 80% has occurred. Callerya neocaledonica has been searched for without success in 2007. The species is assessed as Critically Endangered (Possibly Extinct). More surveys are required to be able to confirm whether it is still extant.
Date last seen: 1992

Geographic Range [top]

Range Description:This species is endemic to New Caledonia, where it is known from a single collection made in Nakutakoin (Dumbea district) in a patch of 3 km² of degraded dry forest (total extent of occurrence and area of occupancy are 3 km²). This collection dates back to 1992 and the species hasn't been observed since.
Countries occurrence:
Native:
New Caledonia
Additional data:
Estimated area of occupancy (AOO) - km2:3
Number of Locations:1
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:In its only known locations, C. neocaledonica is known from a single individual collected in 1992. The species was searched for without success in 2007. It may already be extinct.
Current Population Trend:Unknown
Additional data:
Number of mature individuals:0-50
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is endemic to a single dry forest. 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 were probably characteristic of Noumea and its suburbs a century ago; they are now represented by a few relict and highly disturbed patches. The site where C. neocaledonica was recorded only once is impacted by grazing and trampling of cattle, deer and pigs. The understorey is extremely clear because most regeneration is consumed. The patch of forest is relatively isolated and there are few possibilities that the species is found elsewhere.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): The only known specimen was collected in a patch of dry forest used by cattle, deer and pigs in a suburban area. It is extremely vulnerable to human activities, especially fire and agriculture. Callerya was collected for the first and last time in 1992; it has never been recorded since in spite of several attempts to find it. It is not known whether the species still exists in the wild.

Conservation Actions [top]

Conservation Actions: No conservation measures are in place for this species at present. Surveys targeting this species are needed.

Citation: Hequet, V. 2010. Callerya neocaledonica. The IUCN Red List of Threatened Species 2010: e.T177837A7466940. . Downloaded on 18 August 2017.
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