| 全新世大暖气广西钦州湾红树林衰退的红树林源有机质贡献示踪及其对亚洲季风的响应 |
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| 引用本文： | 孟宪伟,夏鹏,李珍,刘乐军.全新世大暖气广西钦州湾红树林衰退的红树林源有机质贡献示踪及其对亚洲季风的响应[J].海洋学报(英文版),2016,35(2):95-100. |
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| 作者姓名： | 孟宪伟 夏鹏 李珍 刘乐军 |
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| 作者单位： | 国家海洋局第一海洋研究所, 青岛 266061;海洋地质与环境功能实验室, 青岛国家海洋科学与技术实验室, 青岛 266061,国家海洋局第一海洋研究所, 青岛 266061,河口与海岸研究国家重点实验室, 华东师范大学, 上海 200062,国家海洋局第一海洋研究所, 青岛 266061 |
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| 摘 要： | The response of mangrove ecosystems to the Asian monsoon in the future global warming can be understood by reconstructing the development of mangrove forests during the Holocene climatic optimum(HCO), using proxies preserved in coastal sediments. The total organic matter in sediments of a segmented core, with calibrated age ranges between 5.6 and 7.7 cal. ka BP and corresponding to the HCO, from the Qinzhou Bay in Guangxi, China, is quantitatively partitioned into three end-members according to their sources: mangrove-derived, terrigenous,and marine phytoplanktonic, using a three-end-member model depicted by organic carbon isotope(δ13Corg) and the molar ratio of total organic carbon to total nitrogen(C/N). The percentage of mangrove-derived organic matter(MOM) contribution is used as a proxy for mangrove development. Three visible drops in MOM contribution occurred at ca. 7.3, ca. 6.9, and ca. 6.2 cal. ka BP, respectively, are recognized against a relatively stable and higher MOM contribution level, indicating that three distinct mangrove forest degradations occurred in the Qinzhou Bay during the HCO. The three mangrove forest degradations approximately correspond to the time of the strengthened/weakened Asian winter/summer monsoon. This indicates that even during a period favorable for the mangrove development, such as the HCO, climatic extremes, such as cold and dry events driven by the strengthened/weakened Asian winter/summer monsoon, can trigger the degradation of mangrove forests.
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| 关 键 词： | 全新世大暖期 红树林源有机质 红树林衰退 亚洲季风 钦州湾 |
| 收稿时间： | 2014/10/21 0:00:00 |
| 修稿时间： | 2015/6/16 0:00:00 |
Mangrove forest degradation indicated by mangrove-derived organic matter in the Qinzhou Bay, Guangxi, China, and its response to the Asian monsoon during the Holocene climatic optimum |
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| MENG Xianwei,XIA Peng,LI Zhen and LIU Lejun.Mangrove forest degradation indicated by mangrove-derived organic matter in the Qinzhou Bay, Guangxi, China, and its response to the Asian monsoon during the Holocene climatic optimum[J].Acta Oceanologica Sinica,2016,35(2):95-100. |
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| Authors: | MENG Xianwei XIA Peng LI Zhen and LIU Lejun |
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| Affiliation: | 1.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Laboratory for Marine Geology and Environment, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China2.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China3.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China |
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| Abstract: | The response of mangrove ecosystems to the Asian monsoon in the future global warming can be understood by reconstructing the development of mangrove forests during the Holocene climatic optimum (HCO), using proxies preserved in coastal sediments. The total organic matter in sediments of a segmented core, with calibrated age ranges between 5.6 and 7.7 cal. ka BP and corresponding to the HCO, from the Qinzhou Bay in Guangxi, China, is quantitatively partitioned into three end-members according to their sources: mangrove-derived, terrigenous, and marine phytoplanktonic, using a three-end-member model depicted by organic carbon isotope (δ 13Corg) and the molar ratio of total organic carbon to total nitrogen (C/N). The percentage of mangrove-derived organic matter (MOM) contribution is used as a proxy for mangrove development. Three visible drops in MOM contribution occurred at ca. 7.3, ca. 6.9, and ca. 6.2 cal. ka BP, respectively, are recognized against a relatively stable and higher MOM contribution level, indicating that three distinct mangrove forest degradations occurred in the Qinzhou Bay during the HCO. The three mangrove forest degradations approximately correspond to the time of the strengthened/weakened Asian winter/summer monsoon. This indicates that even during a period favorable for the mangrove development, such as the HCO, climatic extremes, such as cold and dry events driven by the strengthened/weakened Asian winter/summer monsoon, can trigger the degradation of mangrove forests. |
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| Keywords: | Holocene climatic optimum mangrove-derived organic matter degradation of mangrove forests Asian monsoon Qinzhou Bay |
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