Post by Melanie on Oct 6, 2008 20:41:10 GMT 1
Scientific Name: Senecio leucopeplus
Species Authority
Intra-specific Authority: Cabrera
Assessment Information [top]
Red List Category & Criteria: Extinct in the Wild ver 3.1
Year Assessed: 2008
Assessor/s de Villalobos, A. (Dep. Biología Bioquímica y Farmacia, UNS, Bahia Blanca, Argentina)
Evaluator/s: Villamil, C. & Long, M.A. (IUCN SSC Temperate South American Plant Red List Authority)
Justification:
Senecio leucopeplus is presumed to be Extinct in the Wild as surveys in its historic distribution range have been carried out since 1986 (C. Villamil pers. comm.) and in a more systematic way between 1996 and 2007 (M.A. Long pers. comm.). Only two specimens were found that have since disappeared given the precarious conditions of establishment. The last survey was carried out on 3 July 2007; that survey recorded the extinction of the last two individuals of this species (Zalba pers. comm.).
S. leucopeplus is a perennial species and clearly visible and identifiable in winter and in summer. Currently there are two individuals in cultivation at the Pillahuincó Botanic Garden (PPET-Buenos Aires).
Geographic Range [top]
Range Description: The species is native to Argentina, and was found in the Province of Buenos Aires, Partido de Tornquist.
Countries: Regionally extinct:
Argentina (Buenos Aires)
Population [top]
Population: The population is now extinct in the wild.
Habitat and Ecology [top]
Habitat and Ecology: S. leucopeplus occured in temperate grasslands.
Systems: Terrestrial
Threats [top]
Major Threat(s): Major threats include: livestock farming, changes in native species dynamics and human disturbance related to recreational activities.
Conservation Actions [top]
Conservation Actions: Further surveys are required to confirm that the species is now Extinct in the Wild. The ex situ efforts need to be increased to ensure a large and healthy population from which plants could possibly be taken for reintroduction back into suitable sites in the wild.
Species Authority
Intra-specific Authority: Cabrera
Assessment Information [top]
Red List Category & Criteria: Extinct in the Wild ver 3.1
Year Assessed: 2008
Assessor/s de Villalobos, A. (Dep. Biología Bioquímica y Farmacia, UNS, Bahia Blanca, Argentina)
Evaluator/s: Villamil, C. & Long, M.A. (IUCN SSC Temperate South American Plant Red List Authority)
Justification:
Senecio leucopeplus is presumed to be Extinct in the Wild as surveys in its historic distribution range have been carried out since 1986 (C. Villamil pers. comm.) and in a more systematic way between 1996 and 2007 (M.A. Long pers. comm.). Only two specimens were found that have since disappeared given the precarious conditions of establishment. The last survey was carried out on 3 July 2007; that survey recorded the extinction of the last two individuals of this species (Zalba pers. comm.).
S. leucopeplus is a perennial species and clearly visible and identifiable in winter and in summer. Currently there are two individuals in cultivation at the Pillahuincó Botanic Garden (PPET-Buenos Aires).
Geographic Range [top]
Range Description: The species is native to Argentina, and was found in the Province of Buenos Aires, Partido de Tornquist.
Countries: Regionally extinct:
Argentina (Buenos Aires)
Population [top]
Population: The population is now extinct in the wild.
Habitat and Ecology [top]
Habitat and Ecology: S. leucopeplus occured in temperate grasslands.
Systems: Terrestrial
Threats [top]
Major Threat(s): Major threats include: livestock farming, changes in native species dynamics and human disturbance related to recreational activities.
Conservation Actions [top]
Conservation Actions: Further surveys are required to confirm that the species is now Extinct in the Wild. The ex situ efforts need to be increased to ensure a large and healthy population from which plants could possibly be taken for reintroduction back into suitable sites in the wild.
