The perennial and seasonal wetland diversity of the Moroccan Middle Atlas region provides a valuable “test-bed” for understanding the response of different hydrosystems to climatic variations. A multiproxy study, based on sedimentological descriptions, together with mineralogy, carbonate content, XRF core scanning and biological proxies supported by AMS ¹⁴C dates, were applied to the 3-m-long core extracted from “Flowers Marsh”, a small Middle Atlas pond. This approach provides evidence for a continuous paleohydrological and paleoenvironmental record during the Mid- to Late Holocene. The investigated aquatic system evolved from a dry or very shallow waterbody towards a system with a progressively rising water level. The dominance of the detrital fraction with poor preservation of bioindicators and eroded pollen, indicate the existence of an ephemeral waterbody from 6000 cal. yr BP until a transitional phase characterized by new sedimentological facies and the appearance of ostracods around 2300 cal. yr BP. This transition, ending at 2000 cal. yr BP, is interpreted as a flooding phase leading to an ephemeral lake. It is certainly fed by the excess water from the nearby Aguelmam Azigza Lake during its high level period. Afterwards, enhanced organic matter deposition and the appearance of well-preserved diatoms until 1400 cal. yr BP corroborate a high water-level trend. Endogenic carbonate to detrital fraction ratios indicate fluctuating, but generally shallow, water levels from 1400 cal. yr BP until 650 cal. yr BP when a relatively rapid rise in water level occurred. Flowers Marsh data are, generally, consistent with most of the existing regional records. The highstand period recorded between 2000 and 1400 cal. yr is a common feature extending to more distant sites from the northern Mediterranean. It corresponds to the wetter Iberian-Roman period. Fluctuating shallow water levels recorded since 1400 cal. yr BP to now could be linked to drier/wetter phases associated with the Medieval Climate Anomaly and the Little Ice Age (650– 150 cal. yr BP) respectively, in the western Mediterranean realm. The present study demonstrates the ability of Flowers Marsh to record valuable palaeohydrological changes since the Mid-Holocene and confirms the high sensitivity of Middle Atlas hydrosystems to climatic changes.

摩洛哥中部阿特拉斯地区的多年生和季节性湿地多样性为了解不同水系对气候变化的响应提供了宝贵的“试验台”。基于沉积学描述以及矿物学，碳酸盐含量，XRF岩心扫描和AMS支持的生物代理的多代理研究¹⁴将C枣应用于从中阿特拉斯小池塘“花沼泽”中提取的3米长岩心。该方法为全新世中期至晚期连续的古水文和古环境记录提供了证据。所研究的水生系统从干燥或非常浅的水体演变为水位逐渐升高的系统。碎屑级分的优势以及生物指示剂的保存性差和花粉被侵蚀，表明存在着6000卡路里的短暂水体。BP直到一个过渡阶段，其特征是新的沉积相和大约2300 cal处的成龙纲出现。年BP。此转换结束于2000 cal。BP年被解释为导致短暂湖泊的洪水期。当然，在高水位时期，附近的Aguelmam Azigza湖会注入过量的水。此后，直到1400 cal为止，有机物的沉积均得到增强，硅藻的保存完好。BP证实了高水位趋势。内生碳酸盐与碎屑分数之比表明，波动范围为1400 cal，但通常较浅。yr BP直到650 cal。当水位相对快速上升时。花沼泽的数据通常与大多数现有的区域记录一致。记录的高峰期在2000到1400 cal之间。yr是一个共同的特征，延伸到距地中海北部更远的地方。它对应于湿润的伊比利亚-罗马时期。自1400 cal以来记录的波动浅水位。现在的BP可能与地中海地区西部的中世纪气候异常和小冰期（650-150 cal.yr BP）分别相关的较干燥/较冷的阶段有关。本研究证明了自新中新世以来花沼记录有价值的古水文变化的能力，并证实了中阿特拉斯水系对气候变化的高度敏感性。