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引用本文:王秀君,房传苓,于志同,王家平,彭冬梅,康静静.新疆博斯腾湖水体颗粒和溶解有机碳的季节变化及其来源初探.湖泊科学,2014,26(4):552-558. DOI:10.18307/2014.0409
WANG Xiujun,FANG Chuanling,YU Zhitong,WANG Jiaping,PENG Dongmei,KANG Jingjing.Seasonal variations and sources of particulate and dissolved organic carbon in Lake Bosten, Xinjiang Province. J. Lake Sci.2014,26(4):552-558. DOI:10.18307/2014.0409
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新疆博斯腾湖水体颗粒和溶解有机碳的季节变化及其来源初探
王秀君1,2, 房传苓1,3, 于志同1,3, 王家平1,3, 彭冬梅1,3, 康静静1,3
1.中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室, 乌鲁木齐 830011;2.美国马里兰大学地球科学交叉学科中心, 马里兰州 20740;3.中国科学院大学, 北京 100049
摘要:
在博斯腾湖选取了13个点位,于2012年5、8、10月测定表层和底层水体中的颗粒有机碳、溶解有机碳、颗粒有机氮和叶绿素a含量.结果显示颗粒和溶解有机碳在表层水体中的浓度与底层相近.博斯腾湖水体中颗粒有机碳的季节变化十分明显,其平均浓度从春季(0.64 mg/L)到夏季(0.71 mg/L)变化不大,但在秋季变化十分显著(浓度达1.58 mg/L).其中西北湖区和湖心区颗粒有机碳的季节变化最明显,东部湖区颗粒有机碳的季节变化相对较小.博斯腾湖水体的颗粒有机碳在春、秋两季主要来自外源输入,在夏季受水体中浮游生物的影响较大.博斯腾湖水体中溶解有机碳也具有一定的季节变化,夏季浓度(平均为9.3 mg/L)略低于春、秋两季(平均为10.3 mg/L).溶解有机碳在河口区的季节变化最强,其夏季浓度明显偏低,主要是由于开都河河水的稀释作用.总体上,博斯腾湖水体中溶解有机碳浓度的变化主要受外部因素的影响.
关键词:  颗粒有机碳  溶解有机碳  季节变化  博斯腾湖  来源
DOI:10.18307/2014.0409
分类号:
基金项目:中国科学院项目(0972021001);国家重点基础研究发展计划"973"项目(2010CB951001)联合资助
Seasonal variations and sources of particulate and dissolved organic carbon in Lake Bosten, Xinjiang Province
WANG Xiujun1,2, FANG Chuanling1,3, YU Zhitong1,3, WANG Jiaping1,3, PENG Dongmei1,3, KANG Jingjing1,3
1.Key Laboratory of Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, P. R. China;2.Earth System Science Interdisciplinary Center, University of Maryland, College Park, Maryland 20740, USA;3.University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
In this paper, we evaluated the seasonal variations of particulate and dissolved organic carbon and explored their sources in Lake Bosten. Water samples were collected at 13 sampling sites during May, August and October in 2012. Particulate organic carbon(POC), dissolved organic carbon(DOC), particulate organic nitrogen(PON) and chlorophyll-a concentrations were analyzed. On average, the POC concentration in the autumn(1.58 mg/L) was 2.2 times and 2.5 times of that in the summer(0.71 mg/L) and spring(0.64 mg/L), respectively. Larger seasonal variation of POC was found in the northwest and central areas whereas eastern lake revealed relatively small seasonal variation of POC. External sources were responsible for the variability of POC in the spring and autumn, but plankton made a considerable contribution to POC in the summer. Overall, the concentration of DOC was lower in the summer than that in the spring and autumn. The average DOC concentration for the whole lake was about 10.3 mg/L in the spring and autumn and 9.3 mg/L in the summer. Unlike POC, DOC showed the largest seasonal change in the river mouth and the smallest change in the central area of the lake. The contribution of allochthonous organic carbon to DOC was probably much bigger than that of autochthonous organic carbon in Lake Bosten.
Key words:  Particulate organic carbon  dissolved organic carbon  seasonal variation  Lake Bosten  source
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