Pittosporum brevispinum 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Apiales Pittosporaceae

Scientific Name: Pittosporum brevispinum Veillon & Tirel
Taxonomic Source(s): Tirel, Ch. and Veillon, J.-M. 2002. Flore de la Nouvelle-Calédonie, tome 24. Pittosporaceae. Museum d'Histoire Naturelle, Paris.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered C2a(i,ii); D ver 3.1
Year Published: 2017
Date Assessed: 2015-07-24
Assessor(s): Gemmill, C., Veillon, J.-M., Amice, R., Cazé, H., Dumontet, V., Fleurot, D., Garnier, D., Gâteblé, G., Letocart, I., Letocart, D., Maggia, L. & Pain, A.
Reviewer(s): Tanguy, V.
Contributor(s): Hequet, V.
Facilitator/Compiler(s): Chanfreau, S.
Pittosporum brevispinum is a sclerophyllous low altitude small tree, endemic to New Caledonia. Its area of occupancy is 24 km² and its area of occurrence is 53 km². Major threats to P. brevispinum are linked to degradation andloss of its habitat. Conversion of dry forest into pasture and degradations caused by Rusa Deer (Rusa timorensis) are causing a continuous decline of dry forest. Moreover, field observations done in 2015 reported the existence of a single subpopulation, composed of only twenty-one individuals. Using criteria C and D,  P. brevispinum as assessed as Critically Endangered (CR) C2a(i,ii);D.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Pittosporum brevispinum is an endemic species of New Caledonia located only on the west coast of Grande Terre, in the Pouembout area.
Countries occurrence:
New Caledonia
Additional data:
Estimated area of occupancy (AOO) - km2:24Continuing decline in area of occupancy (AOO):Yes
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:53
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):10
Upper elevation limit (metres):50
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:In 2015, a census report of the population found 21 individuals: 11 in a dry forest plot fenced and managed by Conservatoire des Espaces Naturels and 10 individuals on an adjacent private property.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:21Continuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:1
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:Yes

Habitat and Ecology [top]

Habitat and Ecology:Pittosporum brevispinum is a sclerophyllous low altitude small tree which grows in dry forest.
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):0

Threats [top]

Major Threat(s): Pittosporum brevispinum is highly threatened by the disappearance of its habitat. According to the scientific community, remaining dry forests of New Caledonia represent only 1% of their original area. Despite the establishment of a programme dedicated to the conservation of dry forest, P. brevispinum remains threatened by grazing of cattle and clearing of forest for agriculture. Consumption of fruit by rat and degradation by Rusa Deer are also threats to this species.

Conservation Actions [top]

Conservation Actions: Pittosporum brevispinum is protected by legislation in Province Nord and Province Sud. The Tiéa area is fenced and monitored by Conservatoire des Espaces Naturels. Field surveys are urgently needed on Nékoro to confirm the supposed presence of a subpopulation. On the basis of experiments conducted by IAC, propagation is not a problem. In situ plantations are thus feasible.

Citation: Gemmill, C., Veillon, J.-M., Amice, R., Cazé, H., Dumontet, V., Fleurot, D., Garnier, D., Gâteblé, G., Letocart, I., Letocart, D., Maggia, L. & Pain, A. 2017. Pittosporum brevispinum. The IUCN Red List of Threatened Species 2017: e.T35262A67753981. . Downloaded on 20 August 2018.
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