干旱区生态环境知识资源中心(Arid): Plant biomass allocation is mediated by precipitation use efficiency in arid and semiarid ecosystems

Arid

DOI	10.1002/ldr.4455
	Plant biomass allocation is mediated by precipitation use efficiency in arid and semiarid ecosystems
	Feng, Siyuan; Ding, Jingyi; Zhan, Tianyu; Zhao, Wenwu; Pereira, Paulo
通讯作者	Ding, JY
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2023
卷号	34 期号:1 页码:221-233
英文摘要	The arid and semiarid grassland ecosystems are characterized by limited water resources and are generally vulnerable to climate change. Understanding how plants in arid and semiarid ecosystems respond to global climatic variation is crucial for ecological restoration under a changing climate. Although the effects of climate on aboveground biomass (AGB) and belowground biomass (BGB) have been widely explored, how AGB and BGB respond to climatic variation is seldom disentangled. There is still a need to understand how plant communities respond to global climate change. In this study, we conducted a transect survey across grasslands in Inner Mongolia to capture changes in AGB and BGB in plant communities. Then, we used structural equation modelling (SEM) to explore the relationship between environmental factors and the root:shoot ratio to understand how plant communities respond to ecological drought under global climate change. Our results showed that low precipitation use efficiency (LPUE) results in a high root:shoot (HRS) ratio, and BGB was more sensitive to environmental changes. By contrast, high precipitation use efficiency (HPUE) led to a low root:shoot (LRS) ratio, and environmental factors had a greater impact on AGB. For the LPUE pattern, soil water content (SWC), pH, and soil total nitrogen (STN) mainly affected the HRS ratio. Soil water content and STN influenced the HRS ratio through a positive effect on BGB . For the HPUE pattern, SWC, STN, and plant abundance (PA) predominantly regulate the LRS ratio, while biodiversity (plant abundance) affects the LRS ratio by positively affecting AGB. Our results highlight the differential impact of precipitation use efficiency on aboveground and belowground biomass allocation. This is important for monitoring the impact of drought events on plant biomass, improving productivity assessment models in arid and semi-arid regions, and assessing local carbon storage accurately.
英文关键词	aboveground biomass arid and semiarid ecosystem belowground biomass biomass allocation Inner Mongolia precipitation use efficiency root shoot ratio
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000867470000001
WOS关键词	BELOW-GROUND BIOMASS ; COMMUNITY STRUCTURE ; ALPINE GRASSLANDS ; SOIL-MOISTURE ; LOESS PLATEAU ; NITROGEN ; CHINA ; ROOT ; BIODIVERSITY ; COMPETITION
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397719
推荐引用方式 GB/T 7714	Feng, Siyuan,Ding, Jingyi,Zhan, Tianyu,et al. Plant biomass allocation is mediated by precipitation use efficiency in arid and semiarid ecosystems[J],2023,34(1):221-233.
APA	Feng, Siyuan,Ding, Jingyi,Zhan, Tianyu,Zhao, Wenwu,&Pereira, Paulo.(2023).Plant biomass allocation is mediated by precipitation use efficiency in arid and semiarid ecosystems.LAND DEGRADATION & DEVELOPMENT,34(1),221-233.
MLA	Feng, Siyuan,et al."Plant biomass allocation is mediated by precipitation use efficiency in arid and semiarid ecosystems".LAND DEGRADATION & DEVELOPMENT 34.1(2023):221-233.