Pittosporum gatopense 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Apiales Pittosporaceae

Scientific Name: Pittosporum gatopense Guillaumin
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) 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 gatopense is an endemic tree of New Caledonia restricted to low altitude sclerophyllous coastal forest patches. Characterized by an area of occupancy of 70 km², an extent of occurrence of 757 km², a population size estimated to be fewer than 250 mature individuals, P. gatopense constitutes a rare species. Last census report of the population found fewer than 50 mature individuals in each subpopulation. Threats to the species include invasive species, bushfire, domestic animal husbandry and urban development, which are resulting in a continuous decline of P. gatopense. Using criteria C, P. gatopense qualifies for listing as Critically Endangered (CR) C2a(i,ii).
Previously published Red List assessments:

Geographic Range [top]

Range Description:Pittosporum gatopense is an endemic tree of New Caledonia restricted to the area of Poya to Voh on the west coast.
Countries occurrence:
New Caledonia
Additional data:
Estimated area of occupancy (AOO) - km2:80Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:757
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:3Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):1
Upper elevation limit (metres):100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:On the basis of seven known subpopulations and last observations, population size is estimated to be fewer than 250 mature individuals and the largest subpopulation size is estimated to be fewer than 50 mature individuals.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:50-249Continuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:Yes
No. of subpopulations:7
Extreme fluctuations in subpopulations:No

Habitat and Ecology [top]

Habitat and Ecology:Pittosporum gatopense is restricted to low altitude sclerophyllous forest patches along the coastline on shallow soil calcareous soils and deeper black tropical clay soils.
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):0

Threats [top]

Major Threat(s): The main threats are linked to damage and loss of habitat. Sclerophyllous forest are subject to multiple threats such as bushfire, animal husbandry, urbanization and building construction related to the KNS mining project. Animal invasive species constitute a threat for natural regeneration (consumption of fruits by rats). Rusa Deer, now perfectly adapted to New Caledonian habitats, are affecting native plants directly (killing plants by eating bark and seedlings) and indirectly (through habitat degradation). According to the scientific community, dry forest represent only 1% of its original size in New Caledonia.

Conservation Actions [top]

Conservation Actions: Protected by legislation in Province Nord and Province Sud, Pittosporum gatopense is monitored by Conservatoire des Espaces Naturels on fenced Népouiri area. A plot, called "zone Jaffré", has been fenced at the initiative of KNS. Field surveys are required at the Moindou locality to confirm if plants still survive here. In order to ensure longevity for this species, wildlife corridors should be maintained between subpopulations to avoid fragmentation. In situ reintroduction associated with monitoring is recommended to stop population decline.

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 gatopense. The IUCN Red List of Threatened Species 2017: e.T35266A67764057. . Downloaded on 20 September 2018.
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