The effects of fire on Pinus sylvestris L. as determined by dendroecological analysis (Sierra de Gredos, Spain)

iForest: Biogeosciences and Forestry

article

Mar Génova¹  Paula Ortega¹  Enrique Sadornil² 

[1] Departamento de Sistemas y Recursos Naturales, Escuela de Ingeniería de Montes, Forestal y del Medio Natural, Universidad Politécnica de Madrid;Departamento de Matemática Aplicada, Escuela de Ingeniería de Montes, Forestal y del Medio Natural, Universidad Politécnica de Madrid

关键词: Disturbances;    Tree-ring Width;    Growth Change;    Absent Rings;    Negative Pointer Years;   

DOI  :  10.3832/ifor3727-015

学科分类：社会科学、人文和艺术（综合）

来源: Societa Italiana di Selvicoltura ed Ecologia Forestale (S I S E F)

【 摘 要 】

Iberian populations of Scots pine (Pinus sylvestris L.) have been declining since the late-glacial period; among those that remain, relict stands have great biological and ecological value. This paper investigates the effects of a 2009 fire on tree growth in one of these small populations in the Sierra de Gredos (Spain) by examining the responses recorded in the tree-ring width series of the surviving trees. The current status and distribution of these surviving trees reveal the severity of the fire; indeed most show scars or other evidence of fire damage. Dendroecological analysis revealed narrower tree rings, indicating negative pointer years for the year of the fire and the following year. A very significant reduction in growth was recorded for the years after the fire, both in terms of tree-ring width and basal area increment; incomplete and even absent rings were also recorded. No relationship was seen between these effects and climatic events. The dates and geographical extension of former possible disturbances were also investigated, using the data from these same trees plus information collected from others in the region. The vulnerability of these populations to past fires was evident. Lastly, given the problems affecting the regeneration of these relict populations, it is strongly suggested to urgently include all these populations in conservation and environmental management programs.

【 授权许可】

Unknown