[Spatial distribution and influencing factors of soil dissolved organic carbon in Dongting Lake Basin].

Q3 Environmental Science
Kang-Ning Duan, Jin-Quan Huang, Ji-Gen Liu, Yun Kong, Xiao-Lan Liu, Wei-Wen Li, Lu Zhang
{"title":"[Spatial distribution and influencing factors of soil dissolved organic carbon in Dongting Lake Basin].","authors":"Kang-Ning Duan, Jin-Quan Huang, Ji-Gen Liu, Yun Kong, Xiao-Lan Liu, Wei-Wen Li, Lu Zhang","doi":"10.13287/j.1001-9332.202504.012","DOIUrl":null,"url":null,"abstract":"<p><p>Soil dissolved organic carbon (DOC) is a crucial component of terrestrial carbon pool, and its spatial distribution characteristics are of significant importance for the regulation of regional carbon sequestration and the enhancement of carbon sink. Taking the Dongting Lake Basin as the research area, by utilizing geostatistics, correlation analysis, and GIS technology, we analyzed the spatial distribution of topsoil (0-10 cm) DOC and its correlation with environmental variables, including land use types, soil physicochemical properties, and topography. The results showed that: 1) Soil DOC content in the Dongting Lake Basin ranged from 4.31 to 271.29 mg·kg<sup>-1</sup>, with an average value of 78.46 mg·kg<sup>-1</sup> and a coefficient of variation of 52.1%, indicating a moderate level of variability. 2) Soil DOC generally exhibited a patchy distribution with a decreasing trend from south to north, showing a moderate spatial autocorrelation with higher variability in the 45°, 90°, and 135° directions due to the joint influences of structural and random factors. 3) Land use patterns, rainfall, slope, soil organic carbon, total nitrogen, and cation exchange capacity were significantly correlated with DOC. Soil physicochemical properties and land use patterns were the main controlling factors affecting the spatial differentiation of soil DOC, with explanation rates of 23.7% and 22.8%, respectively. Our findings would provide a scientific basis for soil carbon sink management and carbon cycle balance in the Dongting Lake Basin.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"36 4","pages":"1171-1178"},"PeriodicalIF":0.0000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"应用生态学报","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.13287/j.1001-9332.202504.012","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Environmental Science","Score":null,"Total":0}
引用次数: 0

Abstract

Soil dissolved organic carbon (DOC) is a crucial component of terrestrial carbon pool, and its spatial distribution characteristics are of significant importance for the regulation of regional carbon sequestration and the enhancement of carbon sink. Taking the Dongting Lake Basin as the research area, by utilizing geostatistics, correlation analysis, and GIS technology, we analyzed the spatial distribution of topsoil (0-10 cm) DOC and its correlation with environmental variables, including land use types, soil physicochemical properties, and topography. The results showed that: 1) Soil DOC content in the Dongting Lake Basin ranged from 4.31 to 271.29 mg·kg-1, with an average value of 78.46 mg·kg-1 and a coefficient of variation of 52.1%, indicating a moderate level of variability. 2) Soil DOC generally exhibited a patchy distribution with a decreasing trend from south to north, showing a moderate spatial autocorrelation with higher variability in the 45°, 90°, and 135° directions due to the joint influences of structural and random factors. 3) Land use patterns, rainfall, slope, soil organic carbon, total nitrogen, and cation exchange capacity were significantly correlated with DOC. Soil physicochemical properties and land use patterns were the main controlling factors affecting the spatial differentiation of soil DOC, with explanation rates of 23.7% and 22.8%, respectively. Our findings would provide a scientific basis for soil carbon sink management and carbon cycle balance in the Dongting Lake Basin.

洞庭湖流域土壤溶解有机碳空间分布及影响因素分析
土壤溶解有机碳(DOC)是陆地碳库的重要组成部分,其空间分布特征对调节区域固碳和增强碳汇具有重要意义。以洞庭湖流域为研究区,利用地质统计学、相关分析和GIS技术,分析了表层土壤(0-10 cm) DOC的空间分布及其与土地利用类型、土壤理化性质、地形等环境变量的相关性。结果表明:1)洞庭湖流域土壤DOC含量变化范围为4.31 ~ 271.29 mg·kg-1,平均值为78.46 mg·kg-1,变异系数为52.1%,呈中等变异性;2)土壤DOC总体呈斑块状分布,自南向北呈递减趋势,在45°、90°和135°方向受结构和随机因素的共同影响,呈现中等空间自相关性,变异率较高。3)土地利用方式、降雨、坡度、土壤有机碳、全氮、阳离子交换量与DOC呈显著相关。土壤理化性质和土地利用方式是影响土壤DOC空间分异的主要控制因子,解释率分别为23.7%和22.8%。研究结果可为洞庭湖流域土壤碳汇管理和碳循环平衡提供科学依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
应用生态学报
应用生态学报 Environmental Science-Ecology
CiteScore
2.50
自引率
0.00%
发文量
11393
期刊介绍:
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信