The retention dynamics of early-spring N input in a temperate forest ecosystem: Implications for winter N deposition

doi:10.1016/j.gecco.2021.e01966

	The retention dynamics of early-spring N input in a temperate forest ecosystem: Implications for winter N deposition
	Ma, Linna 1; Zhang, Chaoxue 1; Lv, Yixia 1; Wang, Renzhong1
	2022
发表期刊	GLOBAL ECOLOGY AND CONSERVATION
卷号	33
摘要	In N-limited temperate regions of China, rates of atmospheric N deposition remain high during winter due to industrial development and energy consumption. Winter-deposited N accumulates and is then released after snowmelt. However, little is known about the retention dynamics of early-spring N input in temperate forest ecosystems. We applied 15N isotopic tracer after snowmelt, and then quantified 15N dynamics in litter, soils, microbes and vascular plants over the following growing season in a warm temperate forest of northern China. In early spring (7 days after 15N addition), approximately 80% of applied 15N was retained in the ecosystem. The 15N recovery was the highest in litter, followed by soils and microbes, with only trivial acquisition in vascular plants. After early spring, there was little change in total 15N recovery over the following season, which indicated that the temperate forest ecosystem had high potential for the retention of early-spring N input. The 15N levels gradually declined in litter and microbes, while they were gradually increased in the vascular plants. In late fall, substantial 15N tracer retained in litter and was resorbed from senescing tissues to roots. Evergreen coniferous trees presented higher 15N acquisition than deciduous broad-leaved trees. Our results suggest that substantial early-spring N input can be retained in warm temperate forest ecosystems. The findings highlight the importance of litter and plants in sustaining early-spring exogenous N resources, inferring the need to considering winter N deposition for a better understanding of N cycling in temperate ecosystems.
关键词	Forest N-15 N deposition N dynamic Snowmelt Winter
学科领域	Biodiversity Conservation ; Ecology
DOI	10.1016/j.gecco.2021.e01966
收录类别	SCI
语种	英语
WOS关键词	SOIL MICROBIAL BIOMASS ; NITROGEN DEPOSITION ; N-15 ; COMPETITION ; CARBON ; PLANTS ; MICROORGANISMS ; (NO3-)-N-15 ; ACQUISITION ; TUNDRA
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000734887900009
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	2351-9894
资助机构	National Natural Science Foundation of China [32071602]
作者邮箱	maln@ibcas.ac.cn ; wangrz@ibcas.ac.cn
作品OA属性	gold
引用统计
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/29052
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Ma, Linna,Zhang, Chaoxue,Lv, Yixia,et al. The retention dynamics of early-spring N input in a temperate forest ecosystem: Implications for winter N deposition[J]. GLOBAL ECOLOGY AND CONSERVATION,2022,33.
APA	Ma, Linna,Zhang, Chaoxue,Lv, Yixia,&Wang, Renzhong.(2022).The retention dynamics of early-spring N input in a temperate forest ecosystem: Implications for winter N deposition.GLOBAL ECOLOGY AND CONSERVATION,33.
MLA	Ma, Linna,et al."The retention dynamics of early-spring N input in a temperate forest ecosystem: Implications for winter N deposition".GLOBAL ECOLOGY AND CONSERVATION 33(2022).

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