| 南海北部底层沉积物捕获器中海雪和生物粪粒组成及来源探究 |
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| 引用本文： | 高萌,黄宝琦,刘志飞,赵玉龙,张艳伟.南海北部底层沉积物捕获器中海雪和生物粪粒组成及来源探究[J].海洋学报(英文版),2020,39(3):141-147. |
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| 作者姓名： | 高萌 黄宝琦 刘志飞 赵玉龙 张艳伟 |
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| 作者单位： | 北京大学地球与空间科学学院, 北京, 100871,北京大学地球与空间科学学院, 北京, 100871,同济大学海洋地质国家重点实验室, 上海, 200092,同济大学海洋地质国家重点实验室, 上海, 200092,同济大学海洋地质国家重点实验室, 上海, 200092 |
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| 基金项目： | The National Natural Science Foundation of China under contract Nos 91528304 and 41376043. |
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| 摘 要： | Sediment traps are an important tool for studying the source, composition and sedimentation processes of sinking particulate matter in the ocean. An in situ observational mooring(TJ-A-1) is located in the northern South China Sea(20.05°N, 117.42°E) at a water depth of 2 100 m and equipped with two sediment traps deployed at 500 m and 1 950 m. Samples were collected at 18-day intervals, and 20 samples were obtained at both depths from May 2014 to May 2015. Large amounts of fecal matter and marine snow were collected in the lower trap. The fluxes of marine snow and fecal pellets exhibited a fluctuating decrease between May 2014 and early August 2014 and then stabilized at a relatively low level. Scanning electron microscopy observations revealed that the main components of the marine snow and fecal pellets were diatoms, coccolithophores, radiolarians, and other debris, all of which are planktons mostly produced in photic zone. Used in conjunction with the particle collection range estimates from the lower trap and data on ocean surface chlorophyll, these marine snow and fecal pellets were related to the lateral transport of deep water and not vertical migrations from overlying water column. Moreover, the source area might be southwest of Taiwan.
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| 关 键 词： | northern South China Sea sediment TRAP marine SNOW FECAL PELLETS |
| 收稿时间： | 2019/5/23 0:00:00 |
Observations of marine snow and fecal pellets in a sediment trap mooring in the northern South China Sea |
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| Gao,Meng,Huang,Baoqi,Liu,Zhifei,Zhao,Yulong,Zhang,Yanwei.Observations of marine snow and fecal pellets in a sediment trap mooring in the northern South China Sea[J].Acta Oceanologica Sinica,2020,39(3):141-147. |
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| Authors: | Gao Meng Huang Baoqi Liu Zhifei Zhao Yulong Zhang Yanwei |
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| Institution: | 1.School of Earth and Space Sciences, Peking University, Beijing 100871, China2.State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China |
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| Abstract: | Sediment traps are an important tool for studying the source, composition and sedimentation processes of sinking particulate matter in the ocean. An in situ observational mooring (TJ-A-1) is located in the northern South China Sea (20.05°N, 117.42°E) at a water depth of 2 100 m and equipped with two sediment traps deployed at 500 m and 1 950 m. Samples were collected at 18-day intervals, and 20 samples were obtained at both depths from May 2014 to May 2015. Large amounts of fecal matter and marine snow were collected in the lower trap. The fluxes of marine snow and fecal pellets exhibited a fluctuating decrease between May 2014 and early August 2014 and then stabilized at a relatively low level. Scanning electron microscopy observations revealed that the main components of the marine snow and fecal pellets were diatoms, coccolithophores, radiolarians, and other debris, all of which are planktons mostly produced in photic zone. Used in conjunction with the particle collection range estimates from the lower trap and data on ocean surface chlorophyll, these marine snow and fecal pellets were related to the lateral transport of deep water and not vertical migrations from overlying water column. Moreover, the source area might be southwest of Taiwan. |
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| Keywords: | northern South China Sea sediment trap marine snow fecal pellets |
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