Evaluation of reproductive sucess and conservation strategies for Senecio coincyi (Asteraceae), a narrow and threatened species

Martinez Garcia, Felipe; Guerrero Garcia, Silvia y Perez Garcia, Felix (2012). Evaluation of reproductive sucess and conservation strategies for Senecio coincyi (Asteraceae), a narrow and threatened species. "Australian Journal of Botany", v. 60 ; pp. 517-525. ISSN 0067-1924.

Descripción

Título: Evaluation of reproductive sucess and conservation strategies for Senecio coincyi (Asteraceae), a narrow and threatened species
Autor/es:
  • Martinez Garcia, Felipe
  • Guerrero Garcia, Silvia
  • Perez Garcia, Felix
Tipo de Documento: Artículo
Título de Revista/Publicación: Australian Journal of Botany
Fecha: 2012
Volumen: 60
Materias:
Escuela: E.U.I.T. Agrícolas (UPM)
Departamento: Biología Vegetal [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Senecio coincyi is a threatened endemic plant of central western Spain, with a very narrow extent of occurrence. The reproductive success and germination behaviour of this species were studied. The area of occupancy, habitat types and size of 13 known subpopulations of S. coincyi were evaluated. The number of individuals that form all these subpopulations was counted. In addition, the number of flowers and cypselas per fruit head and the number of fruit heads per individual plant were recorded in a subset of subpopulations. Germination tests were carried out to evaluate the effect of temperature and light regimes on, and possible intraspecific variation in, cypsela germination. Cypselas reached very high germination percentages (90?100%) from 15?C to 30?C. However, the germination decreased (19%) at 10?C. The light conditions assayed (16-h light photoperiod and complete darkness) did not significantly affect cypsela germination. In general, there was no intraspecific variability in germination patterns of S. coincyi cypselas. Livestock is the most important factor that can be a threat for this species. S. coincyi showed high reproductive success and, therefore, its conservation problems are not due to agents related to its reproduction, but rather to other factors such as alteration of its habitat caused by the presence of livestock.

Más información

ID de Registro: 15767
Identificador DC: http://oa.upm.es/15767/
Identificador OAI: oai:oa.upm.es:15767
Depositado por: Memoria Investigacion
Depositado el: 06 Sep 2013 12:18
Ultima Modificación: 21 Abr 2016 16:04
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