气候变化领域集成服务门户(CCPortal): Changes in precipitation mediate the inhibitory effects of reduced UV-B radiation on the litter decomposition of desert plants in arid regions

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DOI	10.1007/s11368-024-03744-7
	Changes in precipitation mediate the inhibitory effects of reduced UV-B radiation on the litter decomposition of desert plants in arid regions
	Xie, Tingting; Shan, Lishan; Wang, Haixia
发表日期	2024
ISSN	1439-0108
EISSN	1614-7480
英文摘要	PurposeThe decomposition of litter and nutrient cycling in terrestrial ecosystems are significantly influenced by ultraviolet-B (UV-B) radiation. The direction and magnitude of this effect are largely regulated by the dry and wet conditions of the environment. The impact of UV-B radiation on the decomposition process of different litter types in arid desert regions under future precipitation changes remains poorly understood.MethodsA field experiment was conducted to investigate the impact of precipitation changes (natural precipitation, a 30% increase in precipitation, and a 30% reduction in precipitation) on the litter decomposition of Reaumuria soongarica and Salsola passerina under both natural and reduced UV-B radiation conditions.ResultsThe reduction in UV-B radiation significantly decreased mass loss and nutrient release. However, these adverse effects were counteracted by increased precipitation, with an average value of 4.17% for mass loss and 34.35% for nutrient release. Conversely, decreased precipitation intensified these negative effects. The ameliorating effects of increased precipitation were associated with improved soil properties, including higher soil moisture and lower soil temperature, as well as elevated soil enzyme activities such as higher CBH and POD. Moreover, these mitigating effects on mass loss and nutrient release were more pronounced in S. passerina litter than in R. soongarica. A structural equation model revealed that precipitation and UV-B radiation indirectly influenced mass loss by altering soil properties (ST and SM) and soil enzyme activities (CBH and POD).ConclusionOur results suggest that changes in precipitation will modify the effects of reduced UV-B radiation on litter decomposition and nutrient cycling of various plant litters, particularly in plants with lower initial nitrogen content, under climate change.
英文关键词	Litter decomposition; UV-B radiation; Precipitation change; Enzyme activities; Arid region
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
WOS记录号	WOS:001169137500001
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302787
作者单位	Gansu Agricultural University
推荐引用方式 GB/T 7714	Xie, Tingting,Shan, Lishan,Wang, Haixia. Changes in precipitation mediate the inhibitory effects of reduced UV-B radiation on the litter decomposition of desert plants in arid regions[J],2024.
APA	Xie, Tingting,Shan, Lishan,&Wang, Haixia.(2024).Changes in precipitation mediate the inhibitory effects of reduced UV-B radiation on the litter decomposition of desert plants in arid regions.JOURNAL OF SOILS AND SEDIMENTS.
MLA	Xie, Tingting,et al."Changes in precipitation mediate the inhibitory effects of reduced UV-B radiation on the litter decomposition of desert plants in arid regions".JOURNAL OF SOILS AND SEDIMENTS (2024).