Shrub Encroachment Increases Deep Soil Carbon Stocks and Reduces Carbon Turnover Rates in Alpine Meadows on the Tibetan Plateau

IF 2.6 3区 农林科学 Q1 AGRONOMY
Luyun Chen, Narayan Prasad Gaire, Yongheng Gao
{"title":"Shrub Encroachment Increases Deep Soil Carbon Stocks and Reduces Carbon Turnover Rates in Alpine Meadows on the Tibetan Plateau","authors":"Luyun Chen,&nbsp;Narayan Prasad Gaire,&nbsp;Yongheng Gao","doi":"10.1002/jpln.202400507","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Background</h3>\n \n <p>Shrubs have been expanding on the alpine meadows of the Tibetan Plateau (TP).</p>\n </section>\n \n <section>\n \n <h3> Aim</h3>\n \n <p>However, the effects of interactions between shrub size and soil depth on soil organic carbon (SOC) remain unclear.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>In this study, we selected alpine meadows encroached by <i>Lonicera rupicola</i>, <i>Potentilla fruticosa</i>, and <i>Caragana erinacea</i>, establishing sampling sites across three shrub sizes (small, medium, and large) and grass patches. We then measured SOC stocks and estimated SOC turnover rates using the isotopic enrichment factor <i>β</i> at a soil depth of 1 m.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>The results showed that all three typical expanding shrubs increased the SOC stocks, which mainly occurred in the deep soil of 20–100 cm. However, SOC stocks in the 0–10 cm layer tended to decrease with increasing shrub size, whereas the 10–20 cm layer exhibited no significant differences in SOC stocks across different vegetation types. Soils under shrubs also showed significantly higher <i>β</i> values compared to grass soils, particularly under large shrub patches, thus suggesting a slower SOC turnover. A positive correlation was found between <i>β</i> and SOC stock, indicating that the soil carbon (C) sequestration capacity of alpine meadows was enhanced after shrub expansion.</p>\n </section>\n \n <section>\n \n <h3> Conclusion</h3>\n \n <p>This study emphasizes the importance of deep SOC in shrub expansion research and provides new insights into the assessment and prediction of C sink functions in alpine meadows in the context of global change.</p>\n </section>\n </div>","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"188 2","pages":"278-288"},"PeriodicalIF":2.6000,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Plant Nutrition and Soil Science","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/jpln.202400507","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
引用次数: 0

Abstract

Background

Shrubs have been expanding on the alpine meadows of the Tibetan Plateau (TP).

Aim

However, the effects of interactions between shrub size and soil depth on soil organic carbon (SOC) remain unclear.

Methods

In this study, we selected alpine meadows encroached by Lonicera rupicola, Potentilla fruticosa, and Caragana erinacea, establishing sampling sites across three shrub sizes (small, medium, and large) and grass patches. We then measured SOC stocks and estimated SOC turnover rates using the isotopic enrichment factor β at a soil depth of 1 m.

Results

The results showed that all three typical expanding shrubs increased the SOC stocks, which mainly occurred in the deep soil of 20–100 cm. However, SOC stocks in the 0–10 cm layer tended to decrease with increasing shrub size, whereas the 10–20 cm layer exhibited no significant differences in SOC stocks across different vegetation types. Soils under shrubs also showed significantly higher β values compared to grass soils, particularly under large shrub patches, thus suggesting a slower SOC turnover. A positive correlation was found between β and SOC stock, indicating that the soil carbon (C) sequestration capacity of alpine meadows was enhanced after shrub expansion.

Conclusion

This study emphasizes the importance of deep SOC in shrub expansion research and provides new insights into the assessment and prediction of C sink functions in alpine meadows in the context of global change.

Abstract Image

灌木蚕食增加了青藏高原高山草甸的深层土壤碳储量并降低了碳周转率
青藏高原高寒草甸灌丛不断扩大。目的灌丛大小与土壤深度的交互作用对土壤有机碳(SOC)的影响尚不清楚。方法选择金银花(Lonicera rupicola)、果白陵草(Potentilla fruticosa)和锦鸡儿(Caragana erinacea)侵犯的高山草甸,建立小、中、大3种灌木大小和草地样地。然后,我们测量了土壤中有机碳储量,并利用同位素富集因子β估算了土壤中有机碳周转率。结果3种典型扩张灌木均增加了土壤有机碳储量,且主要发生在20 ~ 100 cm深层土壤中。0 ~ 10 cm层土壤有机碳储量随灌丛大小的增加呈减少趋势,10 ~ 20 cm层土壤有机碳储量在不同植被类型间差异不显著。灌丛土壤的β值也显著高于草地土壤,特别是大面积灌丛土壤,表明土壤有机碳转换较慢。β与土壤有机碳储量呈显著正相关,说明灌丛扩张后高寒草甸土壤固碳能力增强。结论本研究强调了深层有机碳在灌丛扩张研究中的重要性,为全球变化背景下高寒草甸碳汇功能的评估与预测提供了新的思路。
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
CiteScore
4.70
自引率
8.00%
发文量
90
审稿时长
8-16 weeks
期刊介绍: Established in 1922, the Journal of Plant Nutrition and Soil Science (JPNSS) is an international peer-reviewed journal devoted to cover the entire spectrum of plant nutrition and soil science from different scale units, e.g. agroecosystem to natural systems. With its wide scope and focus on soil-plant interactions, JPNSS is one of the leading journals on this topic. Articles in JPNSS include reviews, high-standard original papers, and short communications and represent challenging research of international significance. The Journal of Plant Nutrition and Soil Science is one of the world’s oldest journals. You can trust in a peer-reviewed journal that has been established in the plant and soil science community for almost 100 years. Journal of Plant Nutrition and Soil Science (ISSN 1436-8730) is published in six volumes per year, by the German Societies of Plant Nutrition (DGP) and Soil Science (DBG). Furthermore, the Journal of Plant Nutrition and Soil Science (JPNSS) is a Cooperating Journal of the International Union of Soil Science (IUSS). The journal is produced by Wiley-VCH. Topical Divisions of the Journal of Plant Nutrition and Soil Science that are receiving increasing attention are: JPNSS – Topical Divisions Special timely focus in interdisciplinarity: - sustainability & critical zone science. Soil-Plant Interactions: - rhizosphere science & soil ecology - pollutant cycling & plant-soil protection - land use & climate change. Soil Science: - soil chemistry & soil physics - soil biology & biogeochemistry - soil genesis & mineralogy. Plant Nutrition: - plant nutritional physiology - nutrient dynamics & soil fertility - ecophysiological aspects of plant nutrition.
×
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