| 过去100年来闽浙泥质区浮游植物生产力和群落结构在上升流和人类活动影响下的变化 |
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| 引用本文： | 段杉杉,邢磊,张海龙,冯旭文,杨海丽,赵美训.过去100年来闽浙泥质区浮游植物生产力和群落结构在上升流和人类活动影响下的变化[J].海洋学报(英文版),2014,33(10):1-9. |
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| 作者姓名： | 段杉杉 邢磊 张海龙 冯旭文 杨海丽 赵美训 |
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| 作者单位： | 海洋化学理论与技术教育部重点实验室（中国海洋大学）, 青岛 266100, 中国;中国海洋大学海洋有机地球化学研究所, 青岛 266100, 中国;海洋化学理论与技术教育部重点实验室（中国海洋大学）, 青岛 266100, 中国;中国海洋大学海洋有机地球化学研究所, 青岛 266100, 中国;海洋化学理论与技术教育部重点实验室（中国海洋大学）, 青岛 266100, 中国;中国海洋大学海洋有机地球化学研究所, 青岛 266100, 中国;国家海洋局第二海洋研究所, 杭州 310012, 中国;国家海洋局第二海洋研究所, 杭州 310012, 中国;海洋化学理论与技术教育部重点实验室（中国海洋大学）, 青岛 266100, 中国;中国海洋大学海洋有机地球化学研究所, 青岛 266100, 中国 |
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| 基金项目： | The National Basic Research Program of China (973 Program) under contract No. 2010CB428901; the National Natural Science Foundation of China under contract Nos 41020164005, 40976042 and 41076036. |
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| 摘 要： | Phytoplankton productivity and community structure in marginal seas have been altered significantly during the past three decades, but it is still a challenge to distinguish the forcing mechanisms between climate change and anthropogenic activities. High time-resolution biomarker records of two 210Pb-dated sediment cores(#34: 28.5°N, 122.272°E; CJ12-1269: 28.861 9°N, 122.515 3°E) from the Min-Zhe coastal mud area were compared to reveal changes of phytoplankton productivity and community structure over the past 100 years. Phytoplankton productivity started to increase gradually from the 1970 s and increased rapidly after the late 1990 s at Site #34; and it started to increase gradually from the middle 1960 s and increased rapidly after the late 1980 s at Site CJ12-1269. Productivity of Core CJ12-1269 was higher than that of Core #34. Phytoplankton community structure variations displayed opposite patterns in the two cores. The decreasing D/B(dinosterol/brassicasterol) ratio of Core #34 since the 1960 s revealed increased diatom contribution to total productivity. In contrast, the increasing D/B ratio of Core CJ12-1269 since the 1950 s indicated increased dinoflagellate contribution to total productivity. Both the productivity increase and the increased dinoflagellate contribution in Core CJ12-1269 since the 1950–1960s were mainly caused by anthropogenic activities, as the location was closer to the Changjiang River Estuary with higher nutrient concentration and decreasing Si/N ratios. However, increased diatom contribution in Core #34 is proposed to be caused by increased coastal upwelling, with higher nutrient concentration and higher Si/N ratios.
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| 关 键 词： | 植物生产力 群落结构 结构变化 沿海地区 浮游植物群落 浙江 高时间分辨率 人类活动 |
| 收稿时间： | 2013/10/24 0:00:00 |
| 修稿时间： | 2014/3/24 0:00:00 |
Upwelling and anthropogenic forcing on phytoplankton productivity and community structure changes in the Zhejiang coastal area over the last 100 years |
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| DUAN Shanshan,XING Lei,ZHANG Hailong,FENG Xuwen,YANG Haili and ZHAO Meixun.Upwelling and anthropogenic forcing on phytoplankton productivity and community structure changes in the Zhejiang coastal area over the last 100 years[J].Acta Oceanologica Sinica,2014,33(10):1-9. |
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| Authors: | DUAN Shanshan XING Lei ZHANG Hailong FENG Xuwen YANG Haili and ZHAO Meixun |
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| Institution: | 1.Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao 266100, China;Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China2.Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | Phytoplankton productivity and community structure in marginal seas have been altered significantly during the past three decades, but it is still a challenge to distinguish the forcing mechanisms between climate change and anthropogenic activities. High time-resolution biomarker records of two 210Pb-dated sediment cores (#34: 28.5°N, 122.272°E; CJ12-1269: 28.861 9°N, 122.515 3°E) from the Min-Zhe coastal mud area were compared to reveal changes of phytoplankton productivity and community structure over the past 100 years. Phytoplankton productivity started to increase gradually from the 1970s and increased rapidly after the late 1990s at Site #34; and it started to increase gradually from the middle 1960s and increased rapidly after the late 1980s at Site CJ12-1269. Productivity of Core CJ12-1269 was higher than that of Core #34. Phytoplankton community structure variations displayed opposite patterns in the two cores. The decreasing D/B (dinosterol/brassicasterol) ratio of Core #34 since the 1960s revealed increased diatom contribution to total productivity. In contrast, the increasing D/B ratio of Core CJ12-1269 since the 1950s indicated increased dinoflagellate contribution to total productivity. Both the productivity increase and the increased dinoflagellate contribution in Core CJ12-1269 since the 1950-1960s were mainly caused by anthropogenic activities, as the location was closer to the Changjiang River Estuary with higher nutrient concentration and decreasing Si/N ratios. However, increased diatom contribution in Core #34 is proposed to be caused by increased coastal upwelling, with higher nutrient concentration and higher Si/N ratios. |
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| Keywords: | biomarkers phytoplankton community structure Min-Zhe coastal mud area Changjiang Diluted Water upwelling |
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