Abstract A palynological study of carbonate mounds of Atlantic and Mediterranean Moroccan margins was conducted on sediment boxcores MD13-3441, MD13-3456, MD13-3461, MD13-3465, MD13-3468 collected during the oceanographic cruise MD 194/Eurofleet - GATEWAY, which took place on June 2013. The organic remaining revealed a dominance of dinoflagellate cysts over the continental fraction, which showed very low rates. The use of pollen data, despite their low representativity, is proving to be a valuable tool for the paleoclimate interpretation. The palynological quantitative and qualitative analysis revealed the evolution of the paleoenvironment and climate change of the carbonate mounds during this study interval. The terminal Pleistocene–basal Holocene passage highlighted by the dominance of cold taxa of dinoflagellate cysts. The presence and dominance of tree and shrub pollen coupled by the presence of altitudinal conifers confirmed a cold climate in both continental and marine environments. During the lower-middle Holocene, the variations in the relative frequencies of dinoflagellate cyst associations reflect the evolution of the paleoenvironment from inner neritic to oceanic. The recorded microflora shows a cyclicity during the lower Holocene from arid to semi-arid between 10.07 and 9.85 ka (the abundance of herbaceous and steppe), to become arid again around (9.69 ka) by the consistently high rate of herbaceous and steppe. In contrast, the paleoclimate recorded during the Middle Holocene is semi-humid to 6.29 ka (high rate of trees and shrubs) and evolves to a warm dry climate at 5.9–5.14 ka, reflected by the abundance of herbaceous and steppe.

中文翻译：

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全新世沿大西洋和地中海摩洛哥边缘碳酸盐丘的孢粉学研究

摘要 在海洋学巡航 MD 194/Eurofleet 期间收集的沉积箱岩心 MD13-3441、MD13-3456、MD13-3461、MD13-3465、MD13-3468 上进行了大西洋和地中海摩洛哥边缘碳酸盐丘的孢粉学研究，其中发生在 2013 年 6 月。有机残留物显示甲藻囊肿在大陆部分占优势，显示出非常低的比率。花粉数据的使用，尽管其代表性较低，但被证明是古气候解释的宝贵工具。孢粉学定量和定性分析揭示了该研究区间内碳酸盐岩丘的古环境演变和气候变化。以甲藻囊肿的冷分类群的优势突出了更新世-基底全新世的末期通道。乔木和灌木花粉的存在和优势，加上海拔针叶树的存在，证实了大陆和海洋环境中的寒冷气候。在中下全新世，甲藻囊肿关联相对频率的变化反映了古环境从内浅海到大洋的演化。记录的微生物区系在全新世下部从干旱到半干旱的 10.07 和 9.85 ka（草本和草原的丰度）之间显示出周期性，在（9.69 ka）附近由于草本和草原的持续高比率再次变得干旱。相比之下，中全新世记录的古气候为半湿润至 6.29 ka（高乔木和灌木），并在 5.9-5.14 ka 演变为温暖干燥气候，这反映在草本植物和草原的丰度上。