Wind-blown litter transports more carbon and nutrients than wind-blown dust in semi-arid steppes
文献类型： 外文期刊
作者： Luo, Yuhong 1 ; Cai, Yurong 1 ; Zhu, Na 1 ; Li, Le 1 ; Xu, Nuo 1 ; Bao, Yufan 1 ; Yan, Yuchun 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arable Land China, Beijing 100081, Peoples R China
关键词： Litter flux; Dust flux; Wind-driven; Semi-arid grassland; Redistribution of carbon and nutrients
期刊名称：PLANT AND SOIL （ 影响因子：4.1； 五年影响因子：4.7 ）
ISSN： 0032-079X
年卷期： 2025 年
页码：
收录情况： SCI
摘要： Background and aimsWind-driven litter and dust transportation are ubiquitous worldwide, exerting significant ecological influences across diverse landscapes. However, the litter and dust fluxes and the carbon and nutrients they carry remain unclear.MethodsWe conducted six years of synchronous observations of litter and dust fluxes at three sites in a semi-arid steppe in Inner Mongolia, northern China.ResultsOur findings revealed that the horizontal flux of litter exceeded that of dust, with higher levels occurring during the non-growing season than during the growing season. Vertically, both litter and dust fluxes decreased exponentially as the height from the ground increased. Tumble plant biomass and wind emerged as primary litter transport drivers, while an increase in blowing dust days and wind velocity enhanced dust flux significantly. However, vegetation factors, including coverage, height, and aboveground biomass, exhibited negative correlations with dust flux. We discovered that wind-driven litter carries significantly more carbon and nutrients than dust.ConclusionThese findings emphasize that wind-blown litter and dust play crucial roles in redistributing organic carbon and nutrients, thereby enhancing the spatial heterogeneity of these resources in arid and semi-arid ecosystems.
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