Abstract Climate change is one of the biggest challenges facing humankind. Higher temperatures and changes in precipitation will lead to a greater frequency of drought, wildfire, and intense storms that will threaten systems already vulnerable to climate and anthropogenic change. These threats will transform carbon delivery across the terrestrial–aquatic interface. This study investigated how anthropogenic activities and climate influence organic carbon delivery using Englebright Lake, a reservoir in California, as a model system. Organic carbon accumulation in three depositional settings (bottomset, foreset, topset) was analyzed using fatty acid, sterol and lignin biomarkers and compared to records of watershed events to determine responses to dam construction, mining impacts and flood events. Concentrations of long chain saturated fatty acids, plant sterols, epi-brassicasterol/brassicasterol and lignin biomarkers increased by an order of magnitude in foreset deposits in response to flood events (p

中文翻译：

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甾醇、脂肪酸和木质素生物标志物确定了加利福尼亚州（美国）恩格尔布莱特湖有机物积累对气候和人类影响的响应

摘要 气候变化是人类面临的最大挑战之一。更高的温度和降水的变化将导致干旱、野火和强烈风暴的发生频率更高，这将威胁到已经易受气候和人为变化影响的系统。这些威胁将改变陆-水界面的碳输送。本研究使用加利福尼亚州的一个水库恩格尔布莱特湖作为模型系统，调查了人为活动和气候如何影响有机碳的输送。使用脂肪酸、甾醇和木质素生物标志物分析了三个沉积环境（底部、前部、顶部）中的有机碳积累，并与流域事件记录进行了比较，以确定对大坝建设、采矿影响和洪水事件的响应。长链饱和脂肪酸的浓度，