Sedimentary Records of Mangrove Evolution During the Past one Hundred Years Based on Stable Carbon Isotope and Pollen Evidences in Maowei, SW China

作     者：XIA Peng MENG Xianwei LI Zhen FENG Aiping 

作者机构：First Institute of OceanographyState Oceanic Administration State Key Laboratory of Estuarine and Coastal Research East China Normal University 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2016年第15卷第3期

页      面：447-455页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the National Key Scientific Research Project on Global Climate Change (Grant No. 2010CB 951203) the National Natural Science Foundation of China (Grant Nos. 41206057, 41576067, 41376075 and 41576061) 

主　　题：mangrove evolution stable carbon isotope pollen climate change human activity 

摘      要：Mangroves accumulate sedimentary sequences, where cores can provide historical records of mangrove evolution with past climate change and human activity. The study traced the history of mangrove evolution during the past one hundred years in a mangrove swamp of Maowei Sea, SW China. The sedimentation rates(0.38-0.95 cm yr^(-1)) were calculated on the basis of ln(^(210)Pb_(xs)/Al) and mass depth in the core sediments. Chemical tracers, such as δ^(13)C_(org) and C:N values, were utilized to trace the contribution of mangrove-derived organic matter using a ternary mixing model. Because of potential diagenetic alteration and / or overlap in the isotopic signatures of different components, simultaneous use of mangrove pollen diagrams can help to supplement some of these limitations. Combined with mangrove pollen, mangrove evolution was reconstructed and could be divided into three stages: flourishment(1886-1905 AD), slight degradation(1905-1949 AD) and rapid degradation period(1949-2007 AD), which was consistent with previous reports. The reclamation of mangrove swamps to shrimp ponds was the major reason for rapid degradation of mangrove ecosystems in recent years, rather than climate change in the region.