文献类型：期刊文献

英文题名：Effects of Landscape Features on the Roadside Soil Heavy Metal Distribution in a Tropical Area in Southwest China

作者：Dong, Yuhong[1] Liu, Shiliang[2] Sun, Yongxiu[2] Liu, Yixuan[2] Wang, Fangfang[2]

第一作者：董玉红

通信作者：Liu, SL[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China

年份：2021

卷号：11

期号：4

起止页码：1-13

外文期刊名：APPLIED SCIENCES-BASEL

收录：;Scopus(收录号：2-s2.0-85100719146);WOS:【SCI-EXPANDED(收录号:WOS:000632111800001)】；

基金：The work was supported by the National Natural Sciences Foundation of China (No. 41571173) and the second scientific expedition to the Qinghai-Tibet Plateau (No. 2019QZKK0405-05) and Nonprofit Environment Protection Specific Project of China (No. 201209029).

语种：英文

外文关键词：land use; heavy metal; CCA method; spatial variation

摘要：Featured Application Thus far, limited research has been carried out on a large scale that considers landscape characteristics, in-situ soil condition, or land cover. We aim to verify hitherto lacking evidence on the ability of vegetation characteristics and topographical factors to lessen pollutants in tropical regions in China. Soil heavy metals along roadsides pose a great threat to ecosystems while their spatial variations and influencing factors still remain unclear in some regions, especially in tropical areas with complex landscape characteristics. Our study was carried out to determine how the land use, vegetation characteristics, topographical factors and distance to the road affect the soil heavy metal distribution. Taking Jinghong county in Yunnan Province, Southwest China as a case, soil samples were collected at different distances off roads and canonical correspondence analysis (CCA) methods were used to determine the relative importance of different factors. Our results showed that heavy metal sources were obtained mainly from the road, based on the principle component analysis (PCA) identification. There were no obvious trends of soil quality index (SQI) with distance to the road in natural soils, while SQI nutrients and SQI metals in farmlands had a decreasing and increasing trend, respectively, which could both be expressed by logarithm models. However, soil properties showed little differences for road levels while they showed significant differences under land use types. The CCA further showed that heavy metal variations in natural soils were jointly affected by distance, plant coverage, relative elevation and soil properties in decreasing order.