Artículos en revistas:
Evaluation of reproductive sucess and conservation strategies for Senecio coincyi (Asteraceae), a narrow and threatened species
Evaluation of reproductive sucess and conservation strategies for Senecio coincyi (Asteraceae), a narrow and threatened species
Año:2012
Áreas de investigación
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Ciencias naturales y ciencias de la salud
Datos
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Descripción
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| 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. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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Australian Journal of Botany |
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ISSN
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0067-1924 |
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Factor de impacto JCR
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1,111 |
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Información de impacto
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Datos JCR del año 2011 |
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Volumen
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DOI
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Número de revista
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60 |
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Desde la página
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517 |
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Hasta la página
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525 |
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Mes
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SIN MES |
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Ranking
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Participantes
- Autor: Felipe Martínez-García (Departamento de silvopascicultura, Universidad Politécnica de Madrid)
- Autor: Silvia Guerrero-García (Departamento de Silvopascicultura, Universidad Politécnica de Madrid)
- Autor: Felix Perez Garcia (UPM)
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- Departamento: Biología Vegetal
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