全新世大暖期广西北海红树林演化及其对亚洲季风的响应：海岸带埋藏泥炭土记录

全新世大暖期是与21世纪气候变暖趋势最为相似的地质时期。研究这一时期红树林演化及其对受亚洲季风制约的气候变化的响应对于预测气候变暖背景下红树林的命运具有重要意义。本项目拟以广西北海海岸带埋藏红树林泥炭土为研究对象，在精细年龄标定的基础上，通过其记录的红树花粉、生物标志物 (蒲公英萜醇)和稳定碳同位素组成的时间变化及其与邻区珊瑚礁和西南石笋记录的亚洲季风演化历史的对比研究，揭示广西北海全新世大暖期红树林兴衰、群落演替对亚洲季风演化的响应，为气候变暖背景下预测红树林变化趋势提供必要的参考。

The Holocene climatic optimum (HCO) is a best palaeoanalogue of global warming in the 21st century. The response of mangrove ecosystem to future climate warming, therefore, can be understood by reconstructing the development of mangrove forests during this period using some proxies preserved in coastal peat. Based on the establishment of age model, this project plans to reconstruct historical development of mangrove forest in Beihai, Guangxi during the HCO, using mangrove pollen, biomarker (taraxerol), and organic carbon stable isotope (δ13C) as proxies preserved in buried coastal peat. By comparison with the previously-documented evolution of Asian monsoon recorded by adjacent coral ( southwestern Leizhou Penisula) and southwestern stalagmite (Dongge stalagmite) during the Holocene, the links between the historical development of mangrove forest in Beihai and evolution of Asian monsoon will be studied. The success of this project will provide essential references for prediction of mangrove forest change under global climate warming.