| 近140年来广西红树林演变及其对人类活动的响应:有机碳和孢粉联合示踪 |
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| 引用本文： | 夏鹏,孟宪伟,李珍,丰爱平.近140年来广西红树林演变及其对人类活动的响应:有机碳和孢粉联合示踪[J].海洋学报(英文版),2017,36(2):11-21. |
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| 作者姓名： | 夏鹏 孟宪伟 李珍 丰爱平 |
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| 作者单位： | 国家海洋局第一海洋研究所, 山东 青岛 266061,国家海洋局第一海洋研究所, 山东 青岛 266061;青岛海洋科学与技术国家实验室海洋地质与环境功能实验室, 山东 青岛 266237,维多利亚大学地球和海洋科学学院, 加拿大 哥伦比亚 V8W2Y2,国家海洋局第一海洋研究所, 山东 青岛 266061 |
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| 基金项目： | The National Basic Research Program (973 Program) of China under contract No. 2010CB951203; the National Natural Science Foundation of China under contract Nos 41206057, 41576067, 41376075 and 41576061. |
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| 摘 要： | Mangrove degradation must reduce carbon sequestration in recent years, thereby aggravating global warming.Thus, short-term impacts of human activity on mangrove ecosystems are cause for concern from local governments and scientists. Mangroves sediments can provide detailed records of mangrove species variation in the last one hundred years, based on detailed 210 Pb data. The study traced the history of mangrove development and its response to environmental change over the last 140 years in two mangrove swamps of Guangxi, Southwest China. Average sedimentation rates were calculated to be 0.48 cm/a and 0.56 cm/a in the Yingluo Bay and the Maowei Sea, respectively. Chemical indicators(δ13Corg and C:N) were utilized to trace the contribution of mangrove-derived organic matter(MOM) using a ternary mixing model. Simultaneous use of mangrove pollen can help to supplement some of these limitations in diagenetic/overlap of isotopic signatures. We found that vertical distribution of MOM was consistent with mangrove pollen, which could provide similar information for tracing mangrove ecosystems. Therefore, mangrove development was reconstructed and divided into three stages: flourishing, degradation and re-flourishing/re-degradation period. The significant degradation, found in the period of 1968–1998 and 1907–2007 in the Yingluo Bay and the Maowei Sea, respectively, corresponding to a rapid increase of reclamation area and seawall length, rather than climate change as recorded in the region.
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| 关 键 词： | 红树林演变 有机碳同位素 孢粉 人类活动 广西 |
| 收稿时间： | 2015/11/19 0:00:00 |
| 修稿时间： | 2016/1/6 0:00:00 |
Organic carbon isotope and pollen evidence for mangrove development and response to human activity in Guangxi (Southwest China) over the last 140 years |
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| XIA Peng,MENG Xianwei,LI Zhen and FENG Aiping.Organic carbon isotope and pollen evidence for mangrove development and response to human activity in Guangxi (Southwest China) over the last 140 years[J].Acta Oceanologica Sinica,2017,36(2):11-21. |
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| Authors: | XIA Peng MENG Xianwei LI Zhen and FENG Aiping |
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| Institution: | 1.The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China2.The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China3.School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, V8W 2Y2, Canada |
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| Abstract: | Mangrove degradation must reduce carbon sequestration in recent years, thereby aggravating global warming. Thus, short-term impacts of human activity on mangrove ecosystems are cause for concern from local governments and scientists. Mangroves sediments can provide detailed records of mangrove species variation in the last one hundred years, based on detailed 210Pb data. The study traced the history of mangrove development and its response to environmental change over the last 140 years in two mangrove swamps of Guangxi, Southwest China. Average sedimentation rates were calculated to be 0.48 cm/a and 0.56 cm/a in the Yingluo Bay and the Maowei Sea, respectively. Chemical indicators (δ13Corg and C:N) were utilized to trace the contribution of mangrove-derived organic matter (MOM) using a ternary mixing model. Simultaneous use of mangrove pollen can help to supplement some of these limitations in diagenetic/overlap of isotopic signatures. We found that vertical distribution of MOM was consistent with mangrove pollen, which could provide similar information for tracing mangrove ecosystems. Therefore, mangrove development was reconstructed and divided into three stages: flourishing, degradation and re-flourishing/re-degradation period. The significant degradation, found in the period of 1968–1998 and 1907–2007 in the Yingluo Bay and the Maowei Sea, respectively, corresponding to a rapid increase of reclamation area and seawall length, rather than climate change as recorded in the region. |
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| Keywords: | mangrove development organic carbon isotope pollen human activity Guangxi |
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