Spatiotemporal variations in the organic carbon accumulation rate in mangrove sediments from the Yingluo Bay, China, since 1900
Spatiotemporal variations in the organic carbon accumulation rate in mangrove sediments from the Yingluo Bay, China, since 1900
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DOI：
10.1007/s13131-021-1864-5
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发表时间：
2021-07
影响因子：
1.4
通讯作者：
Yao Zhang;Xian-wei Meng;Peng Xia;Jun Zhang;Dahai Liu;Zhen Li;Wanzhu Wang
中科院分区：
文献类型：
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作者：
Yao Zhang;Xian-wei Meng;Peng Xia;Jun Zhang;Dahai Liu;Zhen Li;Wanzhu Wang
红树林不仅可以提供多种生态系统服务功能，而且是有效的碳生产者、捕获者和汇。红树林沉积物中有机碳积累速率（OCAR）的估算是阐明红树林在全球碳收支中的作用的基础。特别是，了解红树林沉积物中OCAR的过去变化对于预测红树林在快速变化的环境中的未来作用至关重要。本文利用英落湾红树林内部和边缘的3个年代沉积物岩心，重建了该地区1900年以来OCAR的时空变化。红树林内部OCAR的增加主要归因于以温度升高为特征的气候变化导致的红树林繁盛。然而，在红树林边缘区，海平面上升下的水动力条件增强是OCAR下降的原因，特别是在20世纪40年代以后。海水淹没持续时间是控制红树林边缘到内部OCAR空间变异性的主要因素，而20世纪40年代以后水动力条件的增强打破了这一格局。
Mangroves can not only provide multiple ecosystem service functions, but are also efficient carbon producers, capturers, and sinks. The estimation of the organic carbon accumulation rate (OCAR) in mangrove sediments is fundamental for elucidating the role of mangroves in the global carbon budget. In particular, understanding the past changes in the OCAR in mangrove sediments is vital for predicting the future role of mangroves in the rapidly changing environment. In this study, three dated sediment cores from interior and fringe of mangroves in the Yingluo Bay, China, were used to reconstruct the spatiotemporal variations of the calculated OCAR since 1900 in this area. The increasing OCAR in the mangrove interior was attributed to mangrove flourishment induced by climate change characterized by the rising temperature. However, in the mangrove fringe, the strengthening hydrodynamic conditions under the sea level rise were responsible for the decreasing OCAR, particularly after the 1940s. Furthermore, the duration of inundation by seawater was the primary factors controlling the spatial variability of the OCAR from the mangrove fringe to interior, while the strengthened hydrodynamic conditions after the 1940s broke this original pattern.