Land use and climate change in Minorca between al Andalus and the feudal conquest (original) (raw)
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Correlations between ecological and cultural changes occurred during a short period between the end of Subboreal and the beginning of Subatlantic in the Amblés Valley (Ávila, central Spain) are analyzed, taking into account palaeopalynological and archaeological data. Plant dynamics from pollen analyses, both from archaeological sites and peat bogs, have been interpreted in relation to human settlements and the transformation of economic practices. These provided a comprehensive hypothesis on human/climate interactions at the beginning of the 1st millennium cal BC. There was an ecological crisis in the region that lasted for a century (ca. 850–760 cal BC). This was especially sharp due to both the geographical constraints of the area and its previous agrarian history. This event implied a sudden and abrupt climatic change from xeric and warm conditions (Subboreal) to more humid and cooler ones (Subatlantic). Environmental stress derived from climatic crisis could be an important factor in the explanation of the historical process, whose main consequences were both the origin of the Iron Age peasant villages and the end of the ‘dehesa’ type landscape.
2009
This paper analyzes the correlation between ecological and cultural changes occurred during a short period between the end of Subboreal and the beginnings of Subatlantic in the Amblés Valley (Ávila, central Spain) taking into account palaeopalynological and archaeological data. Plant dynamics from pollen analyses, both from archaeological sites and peat bogs, have been interpreted in relation to human settlements and the transformation of economic practices. These provided a comprehensive hypothesis on human/climate interactions at the beginning of the Ist millennium cal BC. We suggest that there was an ecological crisis in the region that lasted for a century (ca. 850-760 cal BC). This was especially sharp due to both the geographical constraints of the area and its previous agrarian history. This event implied a sudden and abrupt climatic change from xeric and warm conditions (Subboreal) to more humid and cooler ones (Subatlantic). Environmental stress derived from climatic crisis could be then an important factor in the explanation of the historical process, whose main consequences were both the origin of the Iron Age farming villages and the ‘dehesa’ type landscape.
1998
The Aguas Project was designed in order to investigate the evolutionary dynamics of metastable systems and the role of human practices as a crucial factor in the desertification and degradation of the Mediterranean region. The specific project objectives were: 1. To establish the variation and magnitude of palaeoclimatic conditions manifest in cultural and contexts in the area of the middle Aguas (SE Iberia) between 4000 BC and 800 BC, and its relation to the present day situation. 2. To elucidate ecological changes which have occurred prior to human occupation. 3. To identify the phases of expansion and contraction of human occupation as manifest in archaeological and palaeoenvironmental data. 4. To employ these data to evaluate existing models of human-environmental interaction and their relatio nship to disturbance, stability and resi lience in the evolution of socio/natural systems.
This paper presents a long-term synthetic overview of the socio-ecological dynamics responsible for the shaping of present-day rural landscapes in the Spanish Central System. Available historical and palaeoenvironmental records have been compiled and cross-referenced to characterise key transformations unfolding in this mountainous macroregion during the medieval time span. A sharp deforestation of upland pines and midland oaks was due to extensive Late Antique strategies. Pre-tenth-century trajectories are diverse and exhibit the recovery of high-mountain pine forests and highly localised agropastoral impact on selective mid-altitude niches. The eleventh-century early repopulation policy implied migrations, increased momentum of rural village foundation and extension of colonised agrarian landscapes in the tablelands of the Extremadurii. The pace and intensity of these phenomena depended on ecological and historical circumstances, leading to subsequently different realities. By the mid-thirteenth century the definitive pacification and the rising demographic trend facilitated the later permanent occupation and the ensuing integral and sustainable exploitation of the highlandsand especially the Transierrawithin the feudal system. High-altitude landscapes exhibit intensive forest clearances due to transterminant livestock movements and the benefit of seasonal resources, whereas low-altitude settings specialised in arboriculture and diversified crops to supply urban markets.
The aim of this research is to study the climate and vegetation history in the western Mediterranean, in the Iberian Peninsula, during the middle Holocene through pollen analysis. The origin of the deposits varied from the most xeric to more mesic Mediterranean environments. The timing, extent, and progress of the establishment of the Mediterranean climate have a degree of variability depending on the biogeographical region. Analyses of several pollen sequences reveal climatic transformations in the flora and vegetation between 7000 and 4000 cal. yr BP. Pollen concentrations have been used in some sequences to evaluate the order of magnitude in biomass changes through time. Three main spatial and taxonomic responses could be assumed: (1) in littoral regions, deciduous broadleaf trees were frequently dominant and then replaced by sclerophyllous and evergreen forests; (2) in continental regions and sub-Mediterranean mountains, the dominance of pine throughout the whole Holocene signals a change of less magnitude; and (3) in southeastern semiarid Mediterranean regions, the main changes are reflected by alternation between steppe and shrub communities. The emplacement of the Mediterranean climate is reflected in an aridification process. A temporal first approach of Holocene climatic changes is proposed: a humid phase (12 000–7000 cal. yr BP), a transition phase (7000–5500 cal. yr BP) and an aridification phase (5500 cal. yr BP–Present). According to archaeological data, natural changes in the forests favoured the environments suitable for human settlements, farming and sheepherding.
2018
A multi-proxy palaeoenvironmental study (pollen, non-pollen palynomorphs, charcoal particles, mollusk mac-rofauna) of coastal marshland in Doñana National Park (southwestern Iberian Peninsula) was undertaken to trace environmental change, human activities related to woodland clearance, and past land-use during the mid-late Holocene (~5000–2800 cal BP). The results of this study are combined with archaeological data from the Copper and Bronze Ages and are subsequently compared with those of similar research carried out at the south-westernmost part of Europe with the aim of discerning regional differences or similarities. Our research has allowed us to recognize climate changes and four extreme wave events in the Guadalquivir paleoestuary, which might have contributed to both the cultural change that is observed in the archaeological record at the end of the Chalcolithic and the subsequent population decline during much of the Bronze Age.