Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across China

doi:10.1111/1365-2745.13866

	Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across China
	Hu, Yu-Kun ; Liu, Guo-Fang ; Pan, Xu 2; Song, Yao-Bin ; Dong, Ming 1,3; Cornelissen, Johannes H. C.
	2022
发表期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
卷号	110 期号:6 页码:1259-1270
摘要	Understanding nitrogen (N) cycling in different ecosystems is crucial to predicting and mitigating the global effects of altered N inputs. Although wetlands have always been assumed to differ largely from terrestrial ecosystems in N cycling, evidence from direct comparison from the field along wide environmental gradients is lacking. Here, we hypothesized strong coupling of plant and soil delta N-15 in terrestrial ecosystems due to lower N inputs and losses but weak coupling of plant and soil delta N-15 in wetlands because of higher N inputs and losses. We performed a large-scale field investigation on 26 pairs of herbaceous wetland and terrestrial sites across China covering 21 degrees of latitude and determined natural abundance of nitrogen isotopes (delta N-15) in soils and leaves of 346 dominant and subordinate plant species. We analysed the relationships between leaf and soil delta N-15 and their drivers including plant functional types in these two types of ecosystems. Plant functional types including mycorrhizal type and N-2-fixing status had consistently significant influences on leaf delta N-15 in herbaceous wetland and terrestrial ecosystems. Leaf delta N-15 increased significantly with soil delta N-15 within and across mycorrhizal types in both ecosystems, and, as hypothesized, the relationships were stronger and steeper in terrestrial than in wetland ecosystems. Moreover, leaf and soil delta N-15 were positively and significantly correlated within both N-2-fixers and non-N-2-fixers in terrestrial ecosystems and within only non-N-2-fixers in wetlands. At the community level, we also found more highly significant relationships between leaf and soil delta N-15 in terrestrial than in wetland ecosystems. Besides plant functional types, climatic and soil factors contributed to the variation in leaf delta N-15 in both ecosystems. Synthesis. Weaker relationships between plant and soil delta N-15 in wetlands at species and community levels support the hypothesis that larger N inputs and losses lead to weaker coupling in the plant-soil systems in wetlands than in terrestrial ecosystems. This provides strong evidence from a large spatial scale for contrasting N cycling in these two types of ecosystems regardless of plant functional type in terms of nutrient uptake strategy. Our findings add to our predictive power of ecosystem N dynamics under environmental changes, for example, land-use changes and elevated N inputs.
关键词	large environmental gradients mycorrhizal types nitrogen availability nitrogen dynamics plant functional types plant-soil systems stable isotopes wetlands
学科领域	Plant Sciences ; Ecology
DOI	10.1111/1365-2745.13866
收录类别	SCI
语种	英语
WOS关键词	N-15 NATURAL-ABUNDANCE ; MYCORRHIZAL FUNGI ; STABLE-ISOTOPES ; FOLIAR ; CARBON ; DELTA-N-15 ; PATTERNS ; CLIMATE ; NITRATE ; ECTOMYCORRHIZAL
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000767113600001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2745
资助机构	National Natural Science Foundation of China [31670429, 31400346, 31261120580, 31470712, 31901149] ; China Scholarship Council [201903270009] ; KNAW-CEP [12CDP007]
作者邮箱	ybsong@hznu.edu.cn ; dongming@hznu.edu.cn
作品OA属性	Green Published, Bronze
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/2S10CLM1/28487
专题	植被与环境变化国家重点实验室
作者单位	1.Hangzhou Normal Univ, Coll Life & Environm Sci, Key Lab Hangzhou City Ecosyst Protect & Restorat, Hangzhou, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 3.Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing, Peoples R China 4.Mianyang Normal Univ, Ecol Secur & Protect Key Lab Sichuan Prov, Mianyang, Sichuan, Peoples R China 5.Cornelissen, Johannes H. C.] Vrije Univ Amsterdam, Dept Ecol Sci, Syst Ecol, Amsterdam, Netherlands
推荐引用方式 GB/T 7714	Hu, Yu-Kun,Liu, Guo-Fang,Pan, Xu,et al. Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across China[J]. JOURNAL OF ECOLOGY,2022,110(6):1259-1270.
APA	Hu, Yu-Kun,Liu, Guo-Fang,Pan, Xu,Song, Yao-Bin,Dong, Ming,&Cornelissen, Johannes H. C..(2022).Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across China.JOURNAL OF ECOLOGY,110(6),1259-1270.
MLA	Hu, Yu-Kun,et al."Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across China".JOURNAL OF ECOLOGY 110.6(2022):1259-1270.

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