文献类型： 外文期刊

作者： Uwiragiye, Yves ¹ ; Wang, Jing ³ ; Huang, Yuanyuan ⁴ ; Wu, Liangping ¹ ; Zhou, Jiake ¹ ; Zhang, Yanhui ¹ ; Chen, Meiqi ¹ ; Jing, Hang ¹ ; Qian, Yinfei ⁶ ; Elrys, Ahmed S. ⁷ ; Cheng, Yi ¹ ; Cai, Zucong ¹ ; Xu, Minggang ¹² ; Chang, Scott X. ¹⁴ ; Muller, Christoph ¹¹ ;

作者机构： 1.Nanjing Normal Univ, Sch Geog, Nanjing, Peoples R China

2.Univ Technol & Arts Byumba, Fac Agr Environm Management & Renewable Energy, Dept Agr, Byumba, Rwanda

3.Nanjing Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing, Peoples R China

4.German Ctr Integrat Biodivers Res iDiv, Leipzig, Germany

5.Univ Leipzig, Inst Biol, Expt Interact Ecol, Leipzig, Germany

6.Jiangxi Acad Agr Sci, Soil & Fertilizer & Resources & Environm Inst, Nanchang, Peoples R China

7.Hainan Univ, Coll Trop Crops, Haikou, Peoples R China

8.Zagazig Univ, Fac Agr, Soil Sci Dept, Zagazig, Egypt

9.Jiangsu Ctr Collaborat Innovat Geog Informat Resou, Nanjing, Peoples R China

10.Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, Nanjing, Peoples R China

11.Justus Liebig Univ, Liebig Ctr Agroecol & Climate Impact Res, Giessen, Germany

12.Shanxi Agr Univ, Engineer & Technol Acad Ecol & Environm, Shanxi Prov Key Lab Soil Environm & Nutrient Resou, Taiyuan, Peoples R China

13.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Key Lab Arable Land Qual Monitoring & Evaluat,Mini, Beijing, Peoples R China

14.Univ Alberta, Dept Renewable Resources, Edmonton, AB, Canada

15.Justus Liebig Univ Giessen, Inst Plant Ecol, Giessen, Germany

16.Univ Coll Dublin, Sch Biol & Environm Sci, Dublin, Ireland

17.Univ Coll Dublin, Earth Inst, Dublin, Ireland

关键词： conservative nitrogen cycle; ecosystem nitrogen cycling; land-use change; leaky nitrogen cycle; soil gross nitrogen transformation rates

期刊名称：GLOBAL CHANGE BIOLOGY （ 影响因子：12.0； 五年影响因子：14.0 ）

ISSN： 1354-1013

年卷期： 2024 年 30 卷 10 期

页码：

收录情况： SCI

摘要： Anthropogenic land-use practices influence ecosystem functions and the environment. Yet, the effect of global land-use change on ecosystem nitrogen (N) cycling remains unquantified despite that ecosystem N cycling plays a critical role in maintaining food security. Here, we analysed 2430 paired observations globally to show that converting natural to managed ecosystems increases ratios of autotrophic nitrification to ammonium immobilisation and nitrate to ammonium, but decreases soil immobilisation of mineral N, causing increased N losses via leaching and gaseous N emissions, such as nitrous oxide (e.g., via denitrification), resulting in a leaky N cycle. Changing land use from intensively managed to one that resembles natural ecosystems reversed N losses by 108% on average, resulting in a more conservative N cycle. Structural equation modelling revealed that changes in soil organic carbon, pH and carbon to N ratio were more important than changes in soil moisture content and temperature in predicting ecosystem N retention capacities following land-use conversion and its reversion. The hotspots of leaky N cycles were mostly in equatorial and tropical regions, as well as in Western Europe, the United States and China. Our results suggest that whether an ecosystem exhibits a conservative N cycle after land-use reversion depends on management practices. Changing land use from intensively managed to one that resembles natural ecosystems reversed N losses by 108% on average, resulting in a more conservative N cycle.image