Located between terrestrial and marine ecosystems, mangrove forests are sensitive to changes in climate. The responses of mangrove ecosystems to climate change in the future can be understood by reconstructing past mangrove dynamics using proxies preserved in the intertidal sediments. Considering the complexity of the proxies commonly used, it is necessary to develop a relatively simple, inexpensive proxy. In this study, available chemical tracers (δ¹³C_org and C:N) of the four cores (YLW02, YLW03, O18, and Q37) from the intertidal zone of the northern Beibu Gulf (NBG) and a three-end-member (mangrove, sea grass, and suspended particulate matter) model was utilized to determine the contribution of mangrove-derived organic matter (CMOM) in carbonate-free sediments. Compared with the summed concentration of mangrove pollen (SCMP), a significant positive correlation between CMOM and SCMP is displayed. The calculated CMOM for an additional ²¹⁰Pb-dated sediment core from the Yingluo Bay, NBG (YLW01) clearly indicates a mangrove development going through degradation, flourishing, relative degradation, and relative flourishing, which are separately in correspondence with the lowest, highest, lower, and higher air temperature and rainfall in the time intervals of 1890–1918 AD, 1919–1956 AD, 1957–1990 AD, and 1991–2010 AD. This suggests that CMOM preserved in intertidal sediments has a potential to reconstruct historical mangrove development in high resolution, at the very least, along the coasts of the NBG.

红树林位于陆地和海洋生态系统之间，对气候变化敏感。通过使用潮间带沉积物中保存的代理来重建过去的红树林动态，可以理解红树林生态系统对未来气候变化的响应。考虑到常用代理的复杂性，有必要开发一个相对简单，便宜的代理。在这项研究中，使用化学示踪剂（δ ¹³ C ^_组织和北部北部湾（NBG）潮间带的四个核心（YLW02，YLW03，O18和Q37）和C：N）和三端成员（红树林，海草和悬浮颗粒物）模型用来确定红树林衍生的有机物（CMOM）在无碳酸盐沉积物中的贡献。与红树林花粉（SCMP）的总浓度相比，CMOM和SCMP之间显示出显着的正相关。计算出的额外CMOM为²¹⁰NBG（YLW01）的含铅沉积物芯清楚地表明了红树林的发展经历了退化，繁衍，相对退化和相对繁衍，这分别对应于最低，最高，较低和较高的气温。 1890–1918 AD，1919–1956 AD，1957–1990 AD和1991–2010 AD时间间隔内的降雨。这表明，保存在潮间带沉积物中的CMOM至少可以在NBG沿海地区具有高分辨率重建红树林历史发展的潜力。