Publication: Dinámica de la vegetación durante el Holoceno en la Sierra de Gredos (Sistema Central Español)
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2011-11-10
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Real Sociedad Española de Historia Natural
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Abstract
Se presentan los datos polínicos procedentes de tres secuencias (CH, PD y CbN), localizadas en la Sierra de Gredos (Sistema Central Español), que registran la evolución de la vegetación a partir de los 7000 BP. Los hechos más destacables se resumen en el dominio del pinar, y en el cambio en la composición del bosque local; así, los bosques de Betula y Corylus, desarrollados hasta el 3000 BP son sustituidos por los de Quercus caducifolio y perennifolio. En este momento y solo en la secuencia CH, se detectan presencias de Cedrus y en menor medida de Fagus. A partir de los aproximadamente 1000 BP, tiene lugar una caída importante de los taxones arbóreos, fundamentalmente de Pinus asociado a la expansión de Ericaceae y Poaceae, como respuesta a un aumento tanto de la temperatura como de las actividades antrópicas.
Pollen data from three sequences (CH, PD and CbN) in the Gredos Range (Spanish Central System) have been presented. These data record the evolution of vegetation from the 7000 BP (Holocene). The most important results are summarized in the domain of the pine forest and the change in the local forest composition. Then, the forests of Betula and Corylus, developed until 3000 BP, are replaced by deciduous and evergreen Quercus. At this time and only in the sequence CH, presence of Cedrus and Fagus has been detected. From approximately 1000 BP, takes place an important decrease in arboreal taxa, mainly of Pinus associated with the expansion of Ericaceae and Poaceae, in response to an increase in both temperature and anthropogenic activities.
Pollen data from three sequences (CH, PD and CbN) in the Gredos Range (Spanish Central System) have been presented. These data record the evolution of vegetation from the 7000 BP (Holocene). The most important results are summarized in the domain of the pine forest and the change in the local forest composition. Then, the forests of Betula and Corylus, developed until 3000 BP, are replaced by deciduous and evergreen Quercus. At this time and only in the sequence CH, presence of Cedrus and Fagus has been detected. From approximately 1000 BP, takes place an important decrease in arboreal taxa, mainly of Pinus associated with the expansion of Ericaceae and Poaceae, in response to an increase in both temperature and anthropogenic activities.