This paper reconstructs the vegetation history of the Lake Pueyrredón area during the Holocene and contextualizes the use of space and resources by hunter-gatherer groups according to palaeoenvironmental evolution. The pollen analysis of the Los Flamencos lake sequence is presented and integrated with local archaeological pollen data. Early Holocene vegetation consisted of a dwarf-shrub-grass steppe associated with cold conditions. From 7,600 cal bp a shrub vegetation with forest patches is inferred, suggesting a high moisture availability and possibly involving an eastwards displacement of the forest-steppe ecotone boundary. Human occupation, previously interrupted by the Hudson volcano eruption, and use of space is evident in this period. Between 6,600 and 5,400 cal bp an environmental change to drier conditions suggests a heterogeneous shrub steppe and the higher availability of floristic resources possibly used by hunter-gatherer groups. The predominance of shrub steppe with dwarf shrubs from 5,400 cal bp indicates more arid than current conditions, which correlates with a higher human-environment interaction related to changes in the lake configuration allowing new north–south circulation roads and vice versa, and major floristic resources availability. A decrease in dwarf-shrubs indicates a slight increase in moisture availability since 3,550 cal bp, suggesting a weakening of the westerly winds. The results indicate local and regional changes in vegetation linked mainly to moisture availability and Southern Westerly Winds fluctuations. The integration of pollen, archaeological and palaeogeographic information available and its comparison with other fossil records studied in Patagonia complement palaeoenvironmental reconstruction and explain the changes in a regional palaeoenvironmental framework.

本文重建了全新世 Pueyrredón 湖地区的植被历史，并根据古环境演化将狩猎采集群体对空间和资源的利用置于语境中。介绍了洛斯弗拉门戈湖序列的花粉分析，并与当地考古花粉数据相结合。全新世早期植被由与寒冷条件相关的矮灌木草草原组成。从 7,600 cal bp推断出带有森林斑块的灌木植被，这表明水分可用性很高，并且可能涉及森林-草原交错带边界向东的位移。人类占领，先前被哈德逊火山喷发中断，空间利用在这一时期很明显。6,600 至 5,400 cal bp干旱条件下的环境变化表明灌木草原的多样性和狩猎采集群体可能使用的植物资源的可用性更高。从 5,400 cal bp 开始，灌木草原与矮灌木的优势表明比当前条件更干旱，这与与湖泊构造变化相关的更高的人类 - 环境相互作用相关，允许新的南北循环道路，反之亦然，以及主要植​​物资源可用性。矮灌木的减少表明自 3,550 cal bp以来水分可用性略有增加，表明西风减弱。结果表明植被的局部和区域变化主要与水分供应和南部西风波动有关。花粉、考古和古地理信息的整合及其与巴塔哥尼亚研究的其他化石记录的比较补充了古环境重建并解释了区域古环境框架的变化。