Relationships between microplastic pollution and land use in the Chongqing section of the Yangtze River

作者全名："Ye, Sheng; Pei, Desheng"

作者地址："[Ye, Sheng] Chongqing Univ, Chongqing, Peoples R China; [Ye, Sheng] Univ Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chinese Acad Sci, Chongqing Sch, Chongqing, Peoples R China; [Ye, Sheng] Chongqing Geomat & Remote Sensing Ctr, Chongqing, Peoples R China; [Ye, Sheng] Minist Nat Resources, Key Lab Monitoring Evaluat & Early Warning Terr Sp, Chongqing, Peoples R China; [Pei, Desheng] Chongqing Med Univ, Sch Publ Hlth, Chongqing, Peoples R China"

通信作者："Ye, S (通讯作者)，Chongqing Univ, Chongqing, Peoples R China.; Ye, S (通讯作者)，Univ Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chinese Acad Sci, Chongqing Sch, Chongqing, Peoples R China.; Ye, S (通讯作者)，Chongqing Geomat & Remote Sensing Ctr, Chongqing, Peoples R China.; Ye, S (通讯作者)，Minist Nat Resources, Key Lab Monitoring Evaluat & Early Warning Terr Sp, Chongqing, Peoples R China.; Pei, DS (通讯作者)，Chongqing Med Univ, Sch Publ Hlth, Chongqing, Peoples R China."

来源：FRONTIERS IN ECOLOGY AND EVOLUTION

ESI学科分类：ENVIRONMENT/ECOLOGY

WOS号：WOS:001018897500001

JCR分区：Q2

影响因子：2.4

年份：2023

卷号：11

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：microplastics; land use; correlation analysis; redundancy analysis; buffer scale

摘要："Microplastic (MP) pollution is an emerging environmental issue. While it is evident that human activities are the primary source of MP pollution, the relationship between land use and MP pollution in rivers requires further study. Using data from 26 MP monitoring sites in the Chongqing section of the Yangtze River, we analyzed MP data along with land use and construction data. We improved the model for the Land Use Intensity Composite Index (LUI) to obtain correlations between land use and MP pollution. We found: 1) The concentration of microplastics in surface water (MPsw) in the Chongqing section of the Yangtze River gradually declined from upstream (central urban section of Chongqing) to downstream (northeastern section of Chongqing). 2) From 2016 to 2020, MPsw in the Chongqing section of the Yangtze River decreased by about 7.5-fold. 3) MPsw in the Chongqing section of the Yangtze River was positively correlated with the amount of surrounding urban and garden land. When the buffer radius was 1 km, the correlation coefficient was 0.53 (p < 0.05). With increasing buffer radius, the correlation between land use and gradually weakened. 4) The LUI was also strongly correlated with MPsw. The correlation was strongest when the buffer radius was 1 km, with a correlation coefficient of 0.59 (p < 0.05). At all buffer scales, microplastics in sediments (MPss) was positively correlated with village land and arable land . Unlike MPsw, as the buffer radius increased, the strength of the correlations between land use types and MPss gradually increased. The LUI was strongly correlated with MPsw . As the buffer radius increases, the correlation between the two gradually weakens. These results provide information useful for remediation and reduction of MP in river systems."

基金机构："High-level Talents Project of Chongqing Medical University [R4014]; CAS Team Project of the Belt and Road; Research Program of Chongqing Science and Technology Commission [cstc2019jcyj-zdxmX0035, CSTCCXLJRC201714]; National Natural Science Foundation of China [42001269]; China-Sri Lanka Joint Center for Education and Research of the Chinese Academy of Sciences (CAS); International Partnership Program of CAS [121311kysb20190071]; Program of China-Sri Lanka Joint Center for Water Technology Research and Demonstration of the Chinese Academy of Sciences (CAS); Special Project for Performance Incentive and Guidance of Research Institutions in Chongqing [DLYG2022JXJL004]"

基金资助正文："& nbsp;High-level Talents Project of Chongqing Medical University (No. R4014), CAS Team Project of the Belt and Road (to DP), Research Program of Chongqing Science and Technology Commission (No. cstc2019jcyj-zdxmX0035 and CSTCCXLJRC201714), National Natural Science Foundation of China (No.42001269), China-Sri Lanka Joint Center for Education and Research of the Chinese Academy of Sciences (CAS), International Partnership Program of CAS (No.121311kysb20190071), and Program of China-Sri Lanka Joint Center for Water Technology Research and Demonstration of the Chinese Academy of Sciences (CAS). Special Project for Performance Incentive and Guidance of Research Institutions in Chongqing (No.DLYG2022JXJL004)."