Too much of a good thing? Inorganic nitrogen (N) inhibits moss-associated N2 fixation but organic N can promote it

doi:10.1007/s10533-022-00920-0

	Too much of a good thing? Inorganic nitrogen (N) inhibits moss-associated N2 fixation but organic N can promote it
	Wang, Yinliu 1,2; Lett, Signe 3; Rousk, Kathrin 3
	2022
发表期刊	BIOGEOCHEMISTRY
ISSN	0168-2563
卷号	159 期号:2 页码:179-191
摘要	Moss-associated nitrogen (N-2) fixation is one of the main inputs of new N in pristine ecosystems that are characterized by low N availability. Previous studies have shown that N-2 fixation is inhibited by inorganic N (IN) inputs, but if N-2 fixation in mosses is similarly affected by organic N (ON) remains unknown. Here, we assessed N-2 fixation in two dominant mosses in boreal forests (Pleurozium schreberi and Sphagnum capillifolium) in response to different levels of N, simulating realistic (up to 4 kg N ha(-1) year(-1)) and extreme N addition rates in pristine ecosystems (up to 20 kg N ha(-1) year(-1)) of IN (ammonium nitrate) and ON (alanine and urea). We also assessed if N-2 fixation can recover from the N additions. In the realistic scenario, N-2 fixation was inhibited by increasing NH4NO3 additions in P. schreberi but not in S. capillifolium, and alanine and urea stimulated N-2 fixation in both moss species. In contrast, in the extreme N additions, increasing N inputs inhibited N-2 fixation in both moss species and all N forms. Nitrogen fixation was more sensitive to N inputs in P. schreberi than in S. capillifolium and was higher in the recovery phase after the realistic compared to the extreme N additions. These results demonstrate that N-2 fixation in mosses is less sensitive to organic than inorganic N inputs and highlight the importance of considering different N forms and species-specific responses when estimating the impact of N inputs on ecosystem functions such as moss-associated N-2 fixation.
关键词	Cyanobacteria Feathermosses Nitrogen pollution Nitrogen fixation Organic nitrogen Sphagnum
学科领域	Environmental Sciences ; Geosciences, Multidisciplinary
DOI	10.1007/s10533-022-00920-0
收录类别	SCI
语种	英语
WOS关键词	AMINO-ACID-UPTAKE ; BOREAL ; DEPOSITION ; RESILIENCE ; BRYOPHYTES ; DIVERSITY ; AMMONIUM
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000777056000001
出版者	SPRINGER
文献子类	Article
出版地	DORDRECHT
EISSN	1573-515X
资助机构	Independent Research Fund Denmark (IRFD), Sapere Aude Grant [7027-00011B]
作者邮箱	kathrin.rousk@bio.ku.dk
作品OA属性	Green Submitted
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28522
专题	植被与环境变化国家重点实验室
作者单位	1.Univ Copenhagen, Dept Biol, Univ Sparken 15, DK-2100 Copenhagen, Denmark 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Univ Copenhagen, Ctr Permafrost, Oster Voldgade 10, DK-1350 Copenhagen, Denmark
推荐引用方式 GB/T 7714	Wang, Yinliu,Lett, Signe,Rousk, Kathrin. Too much of a good thing? Inorganic nitrogen (N) inhibits moss-associated N2 fixation but organic N can promote it[J]. BIOGEOCHEMISTRY,2022,159(2):179-191.
APA	Wang, Yinliu,Lett, Signe,&Rousk, Kathrin.(2022).Too much of a good thing? Inorganic nitrogen (N) inhibits moss-associated N2 fixation but organic N can promote it.BIOGEOCHEMISTRY,159(2),179-191.
MLA	Wang, Yinliu,et al."Too much of a good thing? Inorganic nitrogen (N) inhibits moss-associated N2 fixation but organic N can promote it".BIOGEOCHEMISTRY 159.2(2022):179-191.

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