永定河河滨湿地土壤有机碳空间分布特征
Spatial Distribution of Soil Organic Carbon in Riparian Wetland of Yongding River
郭琦 1李谦维 1张灵柯 1刘新蕾 1高俊琴1
作者信息
- 1. 北京林业大学生态与自然保护学院,北京 100083
- 折叠
摘要
湿地是碳密度最大的自然生态系统之一,探究湿地土壤有机碳空间分布特征对制定湿地保护管理政策具有重要意义.通过野外调查和样品采集测定,分析了北京市门头沟区永定河 13 个监测断面的河滨带不同坡位(低位、中位和高位)土壤有机碳含量和密度,阐明了门头沟区永定河河滨湿地土壤有机碳空间分布特征及其主要影响因素.结果表明,门头沟永定河河滨湿地土壤有机碳含量处于 2.25～88.67 g·kg-1之间,平均值为 17.87 g·kg-1;有机碳密度处于 2.14～19.13 kg·m-2之间,平均值为 7.59 kg·m-2.永定河河滨湿地土壤有机碳密度沿河流径流方向呈现先升高后降低的分布格局,山峡段土壤有机碳密度显著高于平原段;土壤有机碳密度在垂直河岸带方向上呈现低位河滨带向高位河滨带逐渐降低的分布特征.永定河河滨湿地土壤有机碳含量和密度与土壤含水率之间具有显著正相关关系.研究结果可为门头沟永定河湿地保护与管理政策制定提供数据支撑.
Abstract
Wetlands are known as one of the natural ecosystems with the highest carbon density.The analysis of the spatial distribution characteristics of soil organic carbon in wetlands is of significant importance to the formulation of effective con-servation and management policies.Our study employed comprehensive field investigations and sample collections to quan-tify the soil organic carbon content and density at different slope positions(low,middle,and high)across 13 monitoring sections along the Yongding River in Mentougou.This study aimed to elucidate the spatial distribution characteristics and primary influencing factors that determine soil organic carbon in the riparian wetlands of the Yongding River in Mentougou.The results show that the soil organic carbon content in the riparian wetland ranged from 2.25 to 88.67 g·kg-1,with an average of 17.87 g·kg-1,and the organic carbon density ranged from 2.14 to 19.13 kg·m-2,with an average of 7.59 kg·m-2.Notably,the soil organic carbon density exhibited an initial increase followed by a subsequent decrease along the river's runoff direction.Furthermore,the canyon sections displayed significantly higher soil organic carbon density com-pared to the plain sections.In the vertical riparian zones,soil organic carbon density decreased gradually from the low ripa-rian zone to the high riparian zone.There is a significant positive correlation between soil organic carbon content and densi-ty and soil moisture content in the Yongding River riparian wetland.This study provides valuable data to support the pro-tection and management policy of the Yongding River wetland in Mentougou.
关键词
永定河/河滨湿地/土壤有机碳/空间分布Key words
Yongding River/riparian wetland/soil organic carbon/spatial distribution引用本文复制引用
基金项目
门头沟区永定河水生态健康评估服务项目(2022HXFWBH-ZZM-02)
出版年
2024
国家科技期刊平台
NSTL
万方数据