Palynological and geochemical analyses provide valuable information about modern and past climatic regimes and vegetation. The impact of climate and humans on past vegetation in the semi‐arid areas of northwestern Iran has received increased interest in the wake of warming temperatures in the Middle East. Palynological and down‐core XRF elemental abundances from a peat core from Lake Neor enabled a reconstruction of vegetational changes of the past 7000 years over the highlands of northwestern Iran. Periods of increased arboreal pollen (AP) types and high (Artemisia + Poaceae)/Chenopodiaceae ratios along with low titanium abundances, high percentages of total organic carbon, more negative δD values, and higher carbon accumulation rates suggest a relatively wet climate. These conditions have persisted during the periods 6700–6200, 5200–4450 and 3200–2200 cal a bp. The overall low AP values, substantial rise of Chenopodiaceae, high Ti abundances and low values of palaeo‐redox proxies, are all evidences of a drier climate, as has been reconstructed for the periods 6200–5200 and 4030–3150 cal a bp and the last 2200 years. An important feature of the last centuries is the increase of anthropogenic and pastoral indicator pollen types. Our results may provide basic data to predict future trends in vegetation dynamics under future climate change in western Asia.

中文翻译：

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尼尔湖揭示了伊朗西北部山区植被如何响应7000年的水文气候变化

孢粉学和地球化学分析提供了有关现代和过去的气候状况和植被的有价值的信息。随着中东温度的升高，气候和人类对伊朗西北半干旱地区过去植被的影响引起了越来越多的关注。来自Neor湖泥炭岩心的孢粉学和下层XRF元素丰度使得能够重建伊朗西北部高地过去7000年的植被变化。树木花粉（AP）类型增加和高（蒿（Artemisia） +禾本科/藜科的比率以及较低的钛丰度，较高的总有机碳百分比，较高的δD负值和较高的碳积累速率表明气候相对潮湿。这些条件在6700-6200、5200-4450和3200-2200 cal abp期间一直存在。总体偏低AP值，藜科的大幅上涨，高缇丰度和古氧化还原代理的低值，是一个干燥的气候的所有证据，如已重建的时期6200-5200和4030-3150 CAL一个基点和最近的2200年。过去几个世纪的重要特征是人为和牧草指示剂花粉类型的增加。我们的结果可能为预测西亚未来气候变化下植被动态的未来趋势提供基础数据。