| Autor: |
Duarte FERREIRA, Cristiana |
| Předmět: |
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| Zdroj: |
E-Journal of Portuguese History; Dec2019, Vol. 17 Issue 2, p121-122, 2p |
| Abstrakt: |
This thesis objective is to contribute to the understanding of the transition to agropastoralist societies and posterior development of this economic system. Based on vegetation development records from the Tagus Valley we try to relate these changes with Holocene palaeoenvironmental dynamics. Palynology was the main analytical procedure aiming to acquire data on the vegetation composition in order to access which factors influenced its evolution during this period. Two cores from natural contexts located in the Lover Tagus Valley, specifically Vale de Cavalos (Chamusca) and Golegã in Portugal were studied to obtain data on palaeoenvironmental dynamics and human behaviour. We tried to identify climatic and anthropic factors that influenced the vegetation evolution. Palynological analyses in two archaeological contexts located in the Spanish Extremadura were also made: Cueva del Sapo (Monfragüe) and Cueva de Los Postes (Fuentes de León). These focused on the acquisition of information related to landscape composition and mainly subsistence activities developed by the prehistoric communities that occupied these areas. Pollen, non-pollen-palynomorphs, micro-charcoal and sedimentary charcoals analysis allowed us to gather information related to the vegetation evolution since ca. 10.200 cal BP until roman times, offering a frame in which climatic variations and deep human behavioural changes were evidenced throughout the Holocene. Vegetation dynamics and fire events reflect the influence of several dry and moist climatic oscillations manifested by forests expansion and decline. An initial relation between human behavioural changes and woodland decline was not verified. The various phases of diminishing or relative expansion of forest areas coincides with climatic variations and cycles described for the Holocene. Pollen and non-pollen-palynomorphs analysis allowed relating pastoral activities with Tagus Valley communities preceding the first direct indicators of agricultural practices. First evidences of agriculture were registered at ca. 7.000 ca BP by the presence of cereal in pollen spectra. Although relevant indicators of agriculture and pastoral practices are observable since the Mesolithic/Early Neolithic, vegetation record and fire events occurrence only indicate an anthropic impact in the landscape after 5.000 cal BP. The intensification of agro-pastoral practices is notorious during the Chalcolithic and Bronze Age. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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