干旱区生态环境知识资源中心(Arid): 青藏高原腹地不同植被下河流溶解性有机碳特征

Arid

	青藏高原腹地不同植被下河流溶解性有机碳特征
其他题名	Research of Rivers in the Qinghai-Tibet Plateau with Different Types of Vegetation Regarding DOC Content
	马小亮 1; 吴晓东 2; 叶琳琳 3; 徐海燕 1; 白炜 1; 胡广录 1; 刘桂民 1
来源期刊	环境科学与技术
ISSN	1003-6504
出版年	2018
卷号	41 期号:9 页码:79-84,89
中文摘要	青藏高原河流众多,为了解这一区域河流溶解性有机碳(DOC)的特征,选择三江源地区不同植被类型下的河流进行研究,在2016年夏季进行采样,并将DOC浓度与流域内的植被分布情况进行统计分析.结果表明,河流DOC浓度范围为5.948~1.511 mg/L,平均值为3.938 mg/L,不同植被类型下的河流DOC浓度大小依次为沼泽草甸>草甸>草原>草原-荒漠.河流DOC浓度与沼泽草甸覆盖所占流域面积比例呈极显著正相关(R~2=0.725,P<0.000 1),相反,分别与流域内的草原和荒漠+裸地的覆盖比例呈极显著负相关;河流DOC的浓度分别与流域面积和流量也呈极显著负相关.此外,河流水体的pH值与DOC浓度负相关,植被退化严重的草原和荒漠地区河流总悬浮物固体浓度较高.因此,流域内的植被类型是河流DOC浓度大小的主要决定因素,且流域面积和流量大小对其也有一定的影响.
英文摘要	To have an understanding of the condition of dissolved organic carbon (DOC) in river water of the Qinghai-Tibet Plateau, researches on the rivers with various types of vegetation of the Three Rivers ’Source Region were conducted. River-water samples were collected during the summer of 2016; and water quality was analyzed in terms of DOC, and the vegetation state in the catchment was taken into consideration for statistical analysis. The results showed that DOC concentrations ranged from 5.948 to 1.511 mg/L, being 3.938 mg/L on average; DOC concentrations of the river-water with respect to the different types of vegetation ranked in descending order as swamp meadow> meadow> steppe> steppe/desert. Rivers ’DOC concentration was in positive correlation with the proportion of swamp meadow area in the catchment significantly (R~2=0.725, P<0.000 1) but in notably negative correlation with the proportions of steppe and steppe/barren land and with the rivers ’flow in the catchment. In addition, pH values were negatively correlated with DOC concentrations as well; the rivers within the steppe and desert areas, where vegetation had been seriously degraded were characterized by relatively high total SS concentrations in river-water. In sum, the content of DOC in the rivers was determined by the vegetation types, which was also related to area of the catchment and rivers discharge.
中文关键词	青藏高原 ; 碳循环 ; 河流 ; 植被类型 ; 流域
英文关键词	Qinghai-Tibet Plateau carbon cycle river vegetation type catchment
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6346434
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237869
作者单位	1.兰州交通大学环境与市政工程学院, 兰州, 甘肃 730070, 中国; 2.中国科学院西北生态环境资源研究院, 冰冻圈国家重点实验室青藏高原冰冻圈观测研究站, 兰州, 甘肃 730000, 中国; 3.南通大学地理科学学院, 南通, 江苏 226007, 中国
推荐引用方式 GB/T 7714	马小亮,吴晓东,叶琳琳,等. 青藏高原腹地不同植被下河流溶解性有机碳特征[J]. 中国科学院西北生态环境资源研究院,2018,41(9):79-84,89.
APA	马小亮.,吴晓东.,叶琳琳.,徐海燕.,白炜.,...&刘桂民.(2018).青藏高原腹地不同植被下河流溶解性有机碳特征.环境科学与技术,41(9),79-84,89.
MLA	马小亮,et al."青藏高原腹地不同植被下河流溶解性有机碳特征".环境科学与技术 41.9(2018):79-84,89.