Ammonium first: natural mosses prefer atmospheric ammonium but vary utilization of dissolved organic nitrogen depending on habitat and nitrogen deposition

	Ammonium first: natural mosses prefer atmospheric ammonium but vary utilization of dissolved organic nitrogen depending on habitat and nitrogen deposition
	Xue-Yan Liu; Keisuke Koba; Akiko Makabe; Xiao-Dong Li; Muneoki Yoh; Cong-Qiang Liu
	2013
Source Publication	New Phytologist
Volume	199 Issue:2 Pages:407–419
Abstract	Mosses, among all types of terrestrial vegetation, are excellent scavengers of anthropogenic nitrogen (N), but their utilization of dissolved organic N (DON) and their reliance on atmospheric N remain uncharacterized in natural environments, which obscures their roles in N cycles. Natural 15N abundance of N sources (nitrate (NO3 -), ammonium (NH4 +) and DON in deposition and soil) for epilithic and terricolous mosses was analyzed at sites with different N depositions at Guiyang, China. Moss NO3 - assimilation was inhibited substantially by the high supply of NH4 + and DON. Therefore, contributions of NH4 + and DON to moss N were partitioned using isotopic mass-balance methods. The N contributions averaged 56% and 46% from atmospheric NH4 +, and 44% and 17% from atmospheric DON in epilithic and terricolous mosses, respectively. In terricolous mosses, soil NH4 + and soil DON accounted for 16% and 21% of bulk N, which are higher than current estimations obtained using 15N-labeling methods. Moreover, anthropogenic NH4 + deposition suppressed utilization of DON and soil N because of the preference of moss for NH4 + under elevated NH4 + deposition. These results underscore the dominance of, and preference for, atmospheric NH4 + in moss N utilization, and highlight the importance of considering DON and soil N sources when estimating moss N sequestration and the impacts of N deposition on mosses
Keyword	Ammonium Atmospheric Nitrogen Deposition Denitrifier Dissolved Organic Nitrogen Moss Nitrogen Preference Soil Nitrogen Availability Stable Nitrogen Isotope
Subject Area	环境地球化学
Indexed By	SCI
Language	英语
Document Type	期刊论文
Identifier	http://ir.gyig.ac.cn/handle/352002/5066
Collection	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文环境地球化学国家重点实验室
Recommended Citation GB/T 7714	Xue-Yan Liu,Keisuke Koba,Akiko Makabe,et al. Ammonium first: natural mosses prefer atmospheric ammonium but vary utilization of dissolved organic nitrogen depending on habitat and nitrogen deposition[J]. New Phytologist,2013,199(2):407–419.
APA	Xue-Yan Liu,Keisuke Koba,Akiko Makabe,Xiao-Dong Li,Muneoki Yoh,&Cong-Qiang Liu.(2013).Ammonium first: natural mosses prefer atmospheric ammonium but vary utilization of dissolved organic nitrogen depending on habitat and nitrogen deposition.New Phytologist,199(2),407–419.
MLA	Xue-Yan Liu,et al."Ammonium first: natural mosses prefer atmospheric ammonium but vary utilization of dissolved organic nitrogen depending on habitat and nitrogen deposition".New Phytologist 199.2(2013):407–419.

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