Ontologia

Lazarum johnsonianum

(A.Hay & S.Taylor) M.D.Barrett, A.Hay & Hett.

VULR Monde (IUCN)
Pays · région · aire protégée · écorégion · biome

Graphe en cours d’indexation

Calcul du tissu écologique de Lazarum johnsonianum.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).

Liste rouge IUCN

VU · Vulnérablecritères D1+2?Inconnue
Évaluation complète
Évaluation
2013 · v3.1
Altitude
4050 m
Profondeur
m
État de la populationExpert
There are no population data available for this species, although Hay and Taylor (1996) estimated that there were less than 1,000 individuals within a conservation reserve. As the species is only known from a single protected area, this estimate infers that the total number of individuals within the population is also less than 1,000.

Menaces identifiées(6 menaces classées CMP-IUCN)

  • 1_1
    Housing & urban areas
    Future
  • 2_1_3
    Agro-industry farming
    Ongoing
  • 2_3_3
    Agro-industry grazing, ranching or farming
    Ongoing
  • 3_2
    Mining & quarrying
    Ongoing
  • 7_1_3
    Trend Unknown/Unrecorded
    Future
  • 8_2
    Problematic native species/diseases
    Ongoing
Description complète des menacesExpert
This species is found in the Arnhem Land tropical savanna ecoregion which is considered to be "relatively stable/intact". The area around Darwin is increasingly being developed for agriculture. Overgrazing, mining, fire, and introduced feral species such as swamp buffalo are all causes for concern. Although the Black Jungle Reserve is only about 40 km from Darwin and 25 km from Palmerston, it is well managed and the population of this species is not likely to be threatened by the processes above.

Habitats préférentiels (classification IUCN)

  • 1_5Forest - Subtropical/Tropical Dry
  • 2_1Savanna - Dry
Mesures de conservation recommandéesExpert
The species is found in the Black Jungle Conservation Reserve, which covers an area of 360 ha and is managed by the Northern Territory Government and the Northern Land Council. This species is in cultivation at the Darwin Botanic Gardens. Seed of the species has not yet been collected by the Millennium Seed Bank project.

This species has been assessed as "2KCi" using ROTAP codes (Hay and Taylor 1996):
2 - Geographic range in Australia less than 100 km
K - Poorly known, taxon that is suspected, but not definitely known, to belong to a threatened category; at present accurate field distribution information is inadequate
C - Reserved, indicates taxon has at least one population within a natural park, other proclaimed conservation reserve or in an area otherwise dedicated for the protection of flora; the taxon may or may not be considered adequately conserved within the reserve, as reflected by the conservation status assigned to it
i - less than 1,000 plants are known to occur within a conservation reserve
Actions de conservation (1)Expert
  • 3_4_2Genome resource bank
Stress écologiques (10)Expert
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
Priorités de recherche (2)Expert
  • 1_2Population size, distribution & trends
  • 1_3Life history & ecology
Niche IUCN globaleExpert

Royaumes biogéographiques

Australasian

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

Geophyte
Références bibliographiques (5)Expert
  1. IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.1). Available at: <a href="http://www.iucnredlist.org">http://www.iucnredlist.org</a>. (Accessed: 12 June 2013).
  2. WCSP. 2008. World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Available at: <a href="http://www.kew.org/wcsp/monocots/">http://www.kew.org/wcsp/monocots/</a>. (Accessed: 2008).
  3. Woinarski, J. 2001. Arnhem Land tropical savanna (AA0701). Available at: <a href="worldwildlife.org/ecoregions/aa0701">worldwildlife.org/ecoregions/aa0701</a>.
  4. Hay, A. and Taylor, S.M. 1996. A new species of <i>Typhonium</i> Schott (Araceae-Areae) from the Northern Territory, with notes on the conservation status of two Areae endemic to the Tiwi Islands. <i>Telopea</i> 6: 563.
  5. Briggs, J.D. and Leigh, J.H. 1996. <i>Rare or Threatened Australian Plants</i>. Australian National Parks and Wildlife Service, Canberra.
Évaluateurs & contributeurs (2)Expert
assessor
Crook, V.
evaluator
Scott, J.A.

Crook, V. 2013. Typhonium johnsonianum. The IUCN Red List of Threatened Species 2013: e.T44393445A44433842. Accessed on 05 May 2026.

Répartition mondiale (heatmap GBIF)Construction en cours

0 obs · 0 cellules
Construction par partitions temporelles GBIF0%

Source : GBIF — observations agrégées par hexagones 0.2° × 0.2° (~22km). Filtre qualité : précision coordonnée < 10 km. Coloration quantile (q50/70/90/99). Fond carte : OpenFreeMap · © OpenStreetMap.

Distribution mondiale

Calcul de la distribution GBIF· ~10–60 s

Phénologie

Calcul du calendrier d'apparition· ~5–30 s

Consulter sur les bases externes

Observations & statuts

Bibliographie

Note nomenclaturale & synonymesExpert

Note nomenclaturale

TAXREF v18 — INPN/MNHN

Synonymes (1)— redirigent vers cette page

  • Typhonium johnsonianumA.Hay & S.Taylor

Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).