<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Carrión, J. S. S.</style></author><author><style face="normal" font="default" size="100%">Fernández, S.</style></author><author><style face="normal" font="default" size="100%">Jiménez-Moreno, G.</style></author><author><style face="normal" font="default" size="100%">Fauquette, S.</style></author><author><style face="normal" font="default" size="100%">Gil-Romera, G.</style></author><author><style face="normal" font="default" size="100%">González-Sampériz, P.</style></author><author><style face="normal" font="default" size="100%">Finlayson, C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The historical origins of aridity and vegetation degradation in southeastern Spain</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Arid Environments</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">historical biogeography</style></keyword><keyword><style  face="normal" font="default" size="100%">Holocene</style></keyword><keyword><style  face="normal" font="default" size="100%">palaeoecology</style></keyword><keyword><style  face="normal" font="default" size="100%">quaternary</style></keyword><keyword><style  face="normal" font="default" size="100%">Spain</style></keyword><keyword><style  face="normal" font="default" size="100%">Tertiary</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0140196308003595</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">74</style></volume><pages><style face="normal" font="default" size="100%">731 - 736</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The complex relationships within modern landscapes cannot be understood without the beneﬁt of retrospective studies. We review palaeoenvironmental data for southeastern Spain, a landscape vulnerable to desertiﬁcation and with antiquity of human pressure on the landscape. A xerophytic component is discernible in the pollen diagrams of the southeastern peninsula ever since the Middle Miocene. During glacial stages of the Pleistocene, mountain grasslands and lowland steppes expanded, but tree vegetation, although episodically contracted, was ever present across the region, explaining part of the modern plant-species diversity. The magnitude of human impacts on vegetation during the Holocene has been highly variable, starting earlier (e.g. after c. 5000 cal years BP) in low-elevation areas and river basins. Forest degradation of the mountains started rather late during the Argaric period, and reached its maximum during the Roman occupation. Over the last millennia, natural and/or human-set ﬁres, combined with overgrazing, probably have pushed forests over a threshold leading to the spread of grassland, thorny scrub, junipers, and nitrophilous communities. The high degree of xerophytization observed today in southeastern Spain results from the long-term determinism of the Mid to Late Holocene climate aridiﬁcation, and the contingency of historical factors like ﬁre events and changes in prehistoric local economies involving resource exhaustion.</style></abstract><issue><style face="normal" font="default" size="100%">7</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Carrión, J. S. S.</style></author><author><style face="normal" font="default" size="100%">Fuentes, N.</style></author><author><style face="normal" font="default" size="100%">González-Sampériz, P.</style></author><author><style face="normal" font="default" size="100%">Sánchez Quirante, L.</style></author><author><style face="normal" font="default" size="100%">Finlayson, J. C. C.</style></author><author><style face="normal" font="default" size="100%">Fernández, S.</style></author><author><style face="normal" font="default" size="100%">Andrade, a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Holocene environmental change in a montane region of southern Europe with a long history of human settlement</style></title><secondary-title><style face="normal" font="default" size="100%">Quaternary Science Reviews</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Holocene (voyant)</style></keyword><keyword><style  face="normal" font="default" size="100%">Pollen analysis</style></keyword><keyword><style  face="normal" font="default" size="100%">Sierra de Baza</style></keyword><keyword><style  face="normal" font="default" size="100%">vegetation changes</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2007///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0277379107001023</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">26</style></volume><pages><style face="normal" font="default" size="100%">1455 - 1475</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">This paper uses a palynological sequence to examine the Holocene (8390–160 cal yr BP) environmental history of the Sierra de Baza (Granada, southeastern Spain) with the goal of establishing the mechanisms exerting control over vegetation change. During the period ca 8390–6320 cal yr BP, Pinus dominated the pollen spectra, indicating a forested landscape over the high-elevation areas of the Sierra. From ca 6320–3800 cal yr BP, an expansion of deciduous oaks and other broad-leaf trees took place. After an optimum around 5800–5600 cal yr BP, mesophytes decreased in the 3800–2560 cal yr BP interval while a ﬁre-prone scrub became established. The main loss of forest accompanied the spread of thorny matorral after ca 2560 cal yr BP. Overall, this mountain region has shown itself to be sensitive to a range of inﬂuences, among which a continental climate that has become increasingly arid over the last 5000 years, the scarcity of soils suitable for cultivation, a geology that includes sources of copper and other metals and, especially, the incidence of grazing as well as the repeated appearance of ﬁres during the last 4000 years, are highlighted. The history of the vegetation of the Sierra de Baza seems clearly inﬂuenced by changes in local economy. Here we discuss how ecological transitions have interacted with cultural changes, with emphasis on the locally highly populated Chalcolithic (5700–4400 cal yr BP) and Argaric (4400–3550 cal yr BP) periods, as well as the Iberian period (3200–2220 cal yr BP). The sierra was abandoned during the Iberian Period which was, paradoxically, when the highest human impact on mountain vegetation is noticeable.</style></abstract><issue><style face="normal" font="default" size="100%">11-12</style></issue></record></records></xml>