Paleoenvironmental data from wet-meadow environments in the arid-semiarid region of Patagonia are still incipient and the paleoenvironmental records came from pollen sequences of caves and rockshelters. The main reasons to study wetland records are their undisturbed (by humans) sedimentologic continuity, in contrast to deposits in rock shelters and caves; and their regional presentation of environmental changes that can be compared to archeological data. The aim of this paper is to evaluate the past hydrological dynamic of a wet-meadow from Deseado Massif and its relationship with the human occupation. For this purpose, we present the results of the sediment and pollen analysis of Mallín La Primavera wet-meadow that provide a sequence starting in the mid-Holocene. The results indicate a lower water table in the mallín prior to 6900 cal yr BP. Sediment analysis indicates low energy sedimentation environment with flood events and very low energy streams. Human occupational data show chronological discontinuities in mid-Holocene in several regions of Patagonia and the southern cone. In the studied region, two chronological hiatuses (7828–6434 cal yr BP and 3005–2710 cal yr BP) where recognized that appear to correlate with shrub steppes, indicating dry conditions. These conditions may explain the lack of archeological radiocarbon dates in the area during this period. The integration of sediment and pollen results from the Deseado Massif indicates dry and windy conditions for the middle Holocene. The lack of archeological radiocarbon dates would have been influenced by the loss of moisture in water sources such as springs and their associated wet meadows (mallines).

巴塔哥尼亚干旱半干旱地区湿草甸环境的古环境数据仍处于起步阶段，古环境记录来自洞穴和岩石庇护所的花粉序列。研究湿地记录的主要原因是它们不受（人类）干扰的沉积连续性，与岩石掩体和洞穴中的沉积形成对比；以及可以与考古数据进行比较的环境变化的区域表现。本文的目的是评估 Deseado 地块湿草甸过去的水文动态及其与人类居住的关系。为此，我们展示了 Mallín La Primavera 湿草甸的沉积物和花粉分析结果，这些结果提供了从全新世中期开始的序列。结果表明，在 6900 cal yr BP 之前， mallín 的地下水位较低。沉积物分析表明具有洪水事件和非常低的能量流的低能量沉积环境。人类职业数据显示，在巴塔哥尼亚和南锥体的几个地区，全新世中期的时间顺序不连续。在研究区域，两个时间间隔（7828-6434 cal yr BP 和 3005-2710 cal yr BP）被认为与灌木草原相关，表明干燥条件。这些条件可以解释这一时期该地区缺乏考古放射性碳数据。来自 Deseado 地块的沉积物和花粉的整合结果表明中全新世的干燥和多风条件。缺乏考古放射性碳日期可能会受到水源（如泉水及其相关湿草地）水分流失的影响。小鱼）。