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DIGITAL.CSIC
Article . 2012 . Peer-reviewed
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Dinámica post-incendio de la vegetación en un valle del Alto Najerilla

Authors: Camarero, Jesús Julio;

Dinámica post-incendio de la vegetación en un valle del Alto Najerilla

Abstract

[ES] En el contexto presente de cambio global caracterizado por un aumento de temperaturas y por el abandono del manejo tradicional del monte es esperable un incremento en el número de incendios forestales en la Cuenca Mediterránea. Sin embargo, se desconocen los patrones de la sucesión vegetal post-incendio en muchos tipos de comunidades de arbustos y árboles. Se analizaron los cambios del suelo y la vegetación tras un incendio ocurrido en 1986 en una zona dominada por retamares (Cytisus scoparius) y rodales de rebollo (Quercus pyrenaica) en el Arroyo de las Truchas, en la parte alta del valle del río Najerilla (La Rioja, norte de España). A escala de la España peninsular se estudió la relación entre el clima estival y el número total de incendios. A escala local, los suelos (textura, pH, actividad de la microbiota, presencia de Fe 3+ ) y la vegetación (cobertura, densidad, altura de C. scoparius) se describieron uno y doce años después del incendio en seis parcelas distribuidas en altitudes distintas a lo largo de dos laderas opuestas correspondientes a la solana y la umbría. En la España peninsular, el número de incendios está relacionado positivamente con la temperatura estival. En el área de estudio, los suelos eran ácidos y de textura franca y se detectó una reducción de la actividad de la microbiota edáfica y un aumento de Fe 3+ en las zonas más afectadas por el incendio. La solana estaba ocupada por C. scoparius, cuya altura aumentaba con la altitud, mientras que la umbría estaba dominada por rodales de rebollos y carrascas (Q. rotundifolia). En la vaguada se encontraron individuos aislados de haya (Fagus sylvatica) y fresno (Fraxinus angustifolia). La vegetación mostró una elevada resiliencia ya que las comunidades previas al incendio determinaron la composición posterior a dicha perturbación. ; [EN] Within the current background of global change, characterized by rising temperatures and by the abandonment of the traditional management of forest, it is expected an increase in the number of fires affecting the forests in the Mediterranean Basin. However, the patterns of post-fire plant succession are still not known in many types of shrub and tree communities. Here, the changes in soil and vegetation characteristics after a fire which occurred in 1986 were analyzed in an area dominated by the common broom (Cytisus scoparius) and by stands of rebollo oak (Quercus pyrenaica) in the Arroyo de las Truchas, High Najerilla river Basin (La Rioja, northern Spain). The relationship between summer climatic conditions and the number of forest fires was also assessed for the peninsular area of Spain. At the local scale, soil (texture, pH, microbiota activity, and presence of Fe 3+ ) and vegetation features (cover, density, height of C. scoparius) were described one and twelve years after the fire happened in six plots located throughout an altitudinal gradient in northern- and southernoriented slopes. In peninsular Spain, the number of fires was positively related to summer temperature. In the study area, soils were acid and showed a loam texture and it was detected a reduction in the soil microbiota activity and an increase in Fe 3+ in those sites most affected by fire. The southern-oriented slope was covered by C. scoparius individuals, whose height increased upslope, whereas rebollo and holm oak (Q. rotundifolia) stands dominated the northernoriented slope. In the bottom valley, beech (Fagus sylvatica) and ash (Fraxinus angustifolia) scattered trees were found. The vegetation showed a high degree of resilience since the communities which were present before the fire determined the plant composition after that disturbance.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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