珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究

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珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究

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中图分类号: P597⁺.2

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The Study of Stable Carbon Isotope Composition of Riverine Suspended Matter and Soil Erosion of the Pearl River Drainage Basin

摘要

摘要: 以珠江流域水体悬浮物为研究对象,对其碳稳定同位素组成(δ13C)及颗粒有机碳(POC)的含量进行了测定和研究。结果表明:河流悬浮物同位素组成与珠江流域植被分布格局、土壤有机质密切相关;珠江悬浮物碳同位素组成主要受C3植被影响,其中,西江悬浮物碳同位素组成表现出较强的C4植被特征。东江水体悬浮物碳同位素组成在洪水季节表现出较强的C4植被特征,其它季节则表现出C3植被特征;北江水体悬浮物碳同位素组成无明显的C4植被特征。东江悬浮物样品POCδ13C值呈逐年上升趋势,与近年来流域内植被破坏和土壤侵蚀加剧相对应,并显示其侵蚀程度超过西江流域。
- 珠江 /
- 水体悬浮物 /
- &delta /
- ¹³C /
- 土壤侵蚀
Abstract: This article describes the changes of environment and vegetation of the Pearl River (Zhujiang) drainage basin by 13C/12C ratios (δ13C value) of particulate organic carbon (POC) and the content of POC, which can be used as effective indicators of the changes of vegetation, and also provides a new way for studying the environmental changes in shorttime scale. 
The organic carbon isotopes composition of suspended matter from the Pearl River identifies the vegetation cover and soil erosion of their watershed. Suspended matter from Beijiang River, the tributary of Pearl River, emphasizes the sole influence of organic matter derived from C3rich plants. Suspended matter from the Xijiang River and Dongjiang River emphasizes the influence of organic matter derived from C3 and C4 plants. In normal seasons, it shows that the influence of organic matter derived from C3 plants in Xijiang and Dongjiang River. The δ13C value of POC gradually went up in Dongjiang River suspended matter from 1990 to 1999, and it varied from 17.8‰ to 26.1‰. Some suspended matter from the Dongjiang River has extremely high δ13C values in flood season (up to 17.6 ). These high values may be the result of severe erosion in the densely populated and intensively farmed region of the middle and lower reaches of Dongjiang River drainage basin. The erosion degree of the Dongjiang River drainage basin was greater than that of the Xijiang River.
- Pearl River, suspended matter, /
- &delta /
- 13C，soil erosion /

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[2]	郜魁, 何尧启, 邱万银, 张鑫, 冯唐慧, 姜修洋. 贵州黑洞4 750年以来高分辨率石笋δ¹³C记录 . 沉积学报, 2024, 42(3): 970-980. doi: 10.14027/j.issn.1000-0550.2022.068
[3]	左景勋, 朱学剑, 陈泳霖, 翟文建. 华北寒武纪苗岭世晚期δ¹³C演化及生态环境特征 . 沉积学报, 2023, 41(1): 289-302. doi: 10.14027/j.issn.1000-0550.2021.062
[4]	付旭东. 巴丹吉林沙漠石英δ¹⁸O值及其物源意义 . 沉积学报, 2017, 35(1): 67-74. doi: 10.14027/j.cnki.cjxb.2017.01.007
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[6]	张昌民, 朱锐, 刘江艳, 杜家元, 李少华, 李小平. 珠江磨刀门河口交杯四沙现代沉积特征及其形成机理 . 沉积学报, 2016, 34(4): 662-669. doi: 10.14027/j.cnki.cjxb.2016.04.006
[7]	张华生, 殷建军, 程海, R Lawrence Edwards, 林玉石, 唐伟, 杨会, 涂林玲, 王华, 潘谋成, 吴夏. 全新世早期弱夏季风事件的精确定位及机制探讨——以湖南莲花洞LHD5石笋为例 . 沉积学报, 2016, 34(2): 281-291. doi: 10.14027/j.cnki.cjxb.2016.02.007
[8]	田庆春, 杨太保, 石培宏. 可可西里古湖泊沉积物有机碳δ¹³C变化特征及其影响因素 . 沉积学报, 2016, 34(2): 260-267. doi: 10.14027/j.cnki.cjxb.2016.02.005
[9]	张银环, 杨琰, 杨勋林, 殷建军, 黄帆, 任小凤, 赵景耀, 刘肖, 聂旭东. 早全新世季风演化的高分辨率石笋δ¹⁸O记录研究——以河南老母洞石笋为例 . 沉积学报, 2015, 33(1): 134-141. doi: 10.14027/j.cnki.cjxb.2015.01.014
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文章访问数: 803
HTML全文浏览量: 12
PDF下载量: 704
被引次数: 0

珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究

收稿日期: 2007-02-14

修回日期: 2007-07-10

刊出日期: 2008-02-10

中图分类号: P597⁺.2

关键词:

珠江 /

水体悬浮物 /

&delta /

13C');" href='javascript:void(0);'>¹³C /

土壤侵蚀

摘要: 以珠江流域水体悬浮物为研究对象,对其碳稳定同位素组成(δ13C)及颗粒有机碳(POC)的含量进行了测定和研究。结果表明:河流悬浮物同位素组成与珠江流域植被分布格局、土壤有机质密切相关;珠江悬浮物碳同位素组成主要受C3植被影响,其中,西江悬浮物碳同位素组成表现出较强的C4植被特征。东江水体悬浮物碳同位素组成在洪水季节表现出较强的C4植被特征,其它季节则表现出C3植被特征;北江水体悬浮物碳同位素组成无明显的C4植被特征。东江悬浮物样品POCδ13C值呈逐年上升趋势,与近年来流域内植被破坏和土壤侵蚀加剧相对应,并显示其侵蚀程度超过西江流域。

The Study of Stable Carbon Isotope Composition of Riverine Suspended Matter and Soil Erosion of the Pearl River Drainage Basin

Received Date: 2007-02-14

Rev Recd Date: 2007-07-10

Publish Date: 2008-02-10

Keywords:

Abstract: This article describes the changes of environment and vegetation of the Pearl River (Zhujiang) drainage basin by 13C/12C ratios (δ13C value) of particulate organic carbon (POC) and the content of POC, which can be used as effective indicators of the changes of vegetation, and also provides a new way for studying the environmental changes in shorttime scale. 
The organic carbon isotopes composition of suspended matter from the Pearl River identifies the vegetation cover and soil erosion of their watershed. Suspended matter from Beijiang River, the tributary of Pearl River, emphasizes the sole influence of organic matter derived from C3rich plants. Suspended matter from the Xijiang River and Dongjiang River emphasizes the influence of organic matter derived from C3 and C4 plants. In normal seasons, it shows that the influence of organic matter derived from C3 plants in Xijiang and Dongjiang River. The δ13C value of POC gradually went up in Dongjiang River suspended matter from 1990 to 1999, and it varied from 17.8‰ to 26.1‰. Some suspended matter from the Dongjiang River has extremely high δ13C values in flood season (up to 17.6 ). These high values may be the result of severe erosion in the densely populated and intensively farmed region of the middle and lower reaches of Dongjiang River drainage basin. The erosion degree of the Dongjiang River drainage basin was greater than that of the Xijiang River.

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珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究

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The Study of Stable Carbon Isotope Composition of Riverine Suspended Matter and Soil Erosion of the Pearl River Drainage Basin

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珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究

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The Study of Stable Carbon Isotope Composition of Riverine Suspended Matter and Soil Erosion of the Pearl River Drainage Basin

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珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究

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The Study of Stable Carbon Isotope Composition of Riverine Suspended Matter and Soil Erosion of the Pearl River Drainage Basin

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出版历程

目录

珠江水体悬浮物碳稳定同位素组成与流域土壤侵蚀研究

English Abstract

The Study of Stable Carbon Isotope Composition of Riverine Suspended Matter and Soil Erosion of the Pearl River Drainage Basin

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期刊在线

联系我们