干旱区生态环境知识资源中心(Arid): Effects of rainfall regime during the growing season on the annual plant communities in semiarid sandy land, northeast China

Arid

DOI	10.1016/j.gecco.2023.e02456
	Effects of rainfall regime during the growing season on the annual plant communities in semiarid sandy land, northeast China
	Yue, Xiangfei; Zhang, Tonghui; Li, Yanqing
通讯作者	Li, YQ
来源期刊	GLOBAL ECOLOGY AND CONSERVATION
EISSN	2351-9894
出版年	2023
卷号	43
英文摘要	Climate change is expected to result in more extreme rainfall regimes that are characterized by intensified rainfall events and prolonged dry intervals. However, to date, the response of the dryland ecosystems to changes in the rainfall regime has remained unresolved. To better understand the effects of individual dry intervals and extreme rainfall regimes on the aboveground/ belowground net primary productivity (ANPP/BNPP) and species diversity of semi-arid sandy grassland, this study aimed to assess the influence of the timing and frequency of prolonged dry intervals on the function of a degraded sandy grassland under a constant total growing-season rainfall. A field rainfall manipulation experiment was carried out in northeast China. The results showed that the 30 day dry interval caused a significant decrease in ANPP and plant cover, except for April. The 30 day dry interval substantially increased the allocation of total net primary productivity (NPP) to BNPP in July, while decreasing the species richness in May and June. The extreme rainfall regimes with lower frequency and longer dry intervals significantly decreased the ANPP, BNPP, plant cover, species richness and species diversity index, while increasing the allocation of the NPP to BNPP and plant density. The mean duration of the dry interval exhibited significant negative correlations with the ANPP, plant cover, species richness, and Simpson index. Variability in dry interval's mean length also had a negative correlation with ANPP, plant cover, and species richness. Our results suggest that annuals in the semiarid sandy land were highly responsive to changes in rainfall regime. Even if rainfall amount remained constant, increases in duration of the dry intervals and the frequency of extreme intervals were more likely to reduce net primary productivity and species diversity in semiarid sandy annual grasslands, and even contribute to desertification. The findings also provide new evidence for the vital roles of dry interval frequency, duration, and timing, as determinants of semiarid ecosystem function and structure.
英文关键词	Extreme rainfall regime Dry interval Annual plant community Aboveground net primary productivity Belowground net primary productivity Species diversity Semiarid sandy land
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001003418100001
WOS关键词	CONTRASTING RESPONSES ; PRIMARY PRODUCTIVITY ; CLIMATE EXTREMES ; ECOLOGICAL ROLE ; PRECIPITATION ; VARIABILITY ; PATTERNS ; EVENTS ; DIVERSITY ; DYNAMICS
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396784
推荐引用方式 GB/T 7714	Yue, Xiangfei,Zhang, Tonghui,Li, Yanqing. Effects of rainfall regime during the growing season on the annual plant communities in semiarid sandy land, northeast China[J],2023,43.
APA	Yue, Xiangfei,Zhang, Tonghui,&Li, Yanqing.(2023).Effects of rainfall regime during the growing season on the annual plant communities in semiarid sandy land, northeast China.GLOBAL ECOLOGY AND CONSERVATION,43.
MLA	Yue, Xiangfei,et al."Effects of rainfall regime during the growing season on the annual plant communities in semiarid sandy land, northeast China".GLOBAL ECOLOGY AND CONSERVATION 43(2023).