Sand dune fixation enhances the contribution of microbial necromass carbon to soil organic carbon: A case study of Mu Us Sandy Land in China

IF 4.8 2区农林科学 Q1 SOIL SCIENCE

Applied Soil Ecology Pub Date : 2025-03-06 DOI:10.1016/j.apsoil.2025.106011

Qing Qu , Zhen Wang , Hongwei Xu , Rentao Liu , Minggang Wang , Sha Xue

{"title":"Sand dune fixation enhances the contribution of microbial necromass carbon to soil organic carbon: A case study of Mu Us Sandy Land in China","authors":"Qing Qu , Zhen Wang , Hongwei Xu , Rentao Liu , Minggang Wang , Sha Xue","doi":"10.1016/j.apsoil.2025.106011","DOIUrl":null,"url":null,"abstract":"<div><div>Restoration of vegetation, soil, and biodiversity is key crucial for managing desertified ecosystems; however, whether desertification restoration promotes the accumulation of microbial necromass carbon (NC) remains unclear. In this study, four dune types (mobile, semi-mobile, semi-fixed, and fixed) were selected to represent different desertification restoration stages, and the accumulation mechanism of microbial NC and its contribution to soil organic carbon (SOC) were analyzed. The results showed that since the plant diversity, soil water content, and microbial activity of semi-mobile, semi-fixed, and fixed dunes were higher than those of mobile dunes, the SOC in semi-mobile (2.63 g kg<sup>−1</sup>), semi-fixed (2.98 g kg<sup>−1</sup>), and fixed (3.82 g kg<sup>−1</sup>) dunes were significantly higher than that in mobile dune (0.98 g kg<sup>−1</sup>). Moreover, sand dune fixation promoted microbial NC accumulation and increased microbial NC/SOC ratio but decreased fungal NC/bacterial NC ratio. In addition, our study showed that plant diversity is the main factor influencing microbial NC, which has direct and indirect effects on microbial NC accumulation. In conclusion, sand dune fixation enhances microbial NC accumulation and its contribution to SOC, and the change is driven mainly by plant diversity. This study enhances our understanding of the microbial NC accumulation mechanism during dune restoration.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106011"},"PeriodicalIF":4.8000,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Soil Ecology","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0929139325001490","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SOIL SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

Restoration of vegetation, soil, and biodiversity is key crucial for managing desertified ecosystems; however, whether desertification restoration promotes the accumulation of microbial necromass carbon (NC) remains unclear. In this study, four dune types (mobile, semi-mobile, semi-fixed, and fixed) were selected to represent different desertification restoration stages, and the accumulation mechanism of microbial NC and its contribution to soil organic carbon (SOC) were analyzed. The results showed that since the plant diversity, soil water content, and microbial activity of semi-mobile, semi-fixed, and fixed dunes were higher than those of mobile dunes, the SOC in semi-mobile (2.63 g kg⁻¹), semi-fixed (2.98 g kg⁻¹), and fixed (3.82 g kg⁻¹) dunes were significantly higher than that in mobile dune (0.98 g kg⁻¹). Moreover, sand dune fixation promoted microbial NC accumulation and increased microbial NC/SOC ratio but decreased fungal NC/bacterial NC ratio. In addition, our study showed that plant diversity is the main factor influencing microbial NC, which has direct and indirect effects on microbial NC accumulation. In conclusion, sand dune fixation enhances microbial NC accumulation and its contribution to SOC, and the change is driven mainly by plant diversity. This study enhances our understanding of the microbial NC accumulation mechanism during dune restoration.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Soil Ecology 农林科学-土壤科学

CiteScore

9.70

自引率

4.20%

发文量

363

审稿时长

5.3 months

期刊介绍： Applied Soil Ecology addresses the role of soil organisms and their interactions in relation to: sustainability and productivity, nutrient cycling and other soil processes, the maintenance of soil functions, the impact of human activities on soil ecosystems and bio(techno)logical control of soil-inhabiting pests, diseases and weeds.