Foliar and soil N-15 natural abundances provide field evidence on nitrogen dynamics in temperate and boreal forest ecosystems
Cheng, Shu-Lan1,2; Fang, Hua-Jun1; Yu, Gui-Rui1; Zhu, Tian-Hong2; Zheng, Jiao-Jiao2
2010-12-01
Source PublicationPLANT AND SOIL
Volume337Issue:1-2Pages:285-297
AbstractThe natural abundance of N-15 (delta N-15) in plants and soils is an ideal tool for assessing ecosystem N dynamics. However, many of the mechanisms driving the variability of foliar and soil delta N-15 values within and across ecosystems are still unclear. In this study, we analyzed the patterns of N concentrations and delta N-15 values in leaves, bulk soils and soil mineral N as well as soil N turnover rates across four temperate and boreal forest ecosystems along a mountain transect. The results showed that plant species and soil properties directly controlled soil delta N-15 patterns and climate factors (air temperature and precipitation) indirectly affected foliar delta N-15 patterns. Foliar N concentrations varied consistently with the concentrations of soil available N and soil NO (3) (-) -N, whereas foliar delta N-15 was most closely associated with the delta N-15 of soil NH (4) (+) , the most abundant form of N in soil solution. N-15 enrichment in surface mineral soil in high elevation forests was mainly attributed to N-15-enriched organic N accumulation. Furthermore, the foliar enrichment factor (epsilon(p/s) = I ' N-15(foliage)-I ' N-15(soil)) was significantly correlated with N transformation and loss rates, and was negatively correlated with the ratio of NH (4) (+) to total inorganic N. These results suggest that foliar delta N-15 value and foliar N concentration together accurately reflect the N availability of forest ecosystems. Foliar epsilon(p/s) can act as an integrated proxy to reflect the status of N cycling within or across forest ecosystems. Soil nitrification and species' NH (4) (+) to NO (3) (-) uptake ratios are key processes controlling foliar delta N-15 patterns in N-limited forest ecosystems. Our findings improve the mechanistic understanding of the commonly observed variability in foliar and soil delta N-15 within and across forest ecosystems.
SubtypeArticle
KeywordN-15 Natural Abundance n Availability n Transformation n Loss Enrichment Factor Mountain Transect
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedAgriculture ; Plant Sciences
WOS KeywordMYCORRHIZAL FUNGI ; N-MINERALIZATION ; CARBON-CYCLE ; DELTA-N-15 ; PLANT ; GRADIENT ; AVAILABILITY ; PATTERNS ; NITRATE ; ENRICHMENT
Indexed BySCI
Language英语
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000284159900021
PublisherSPRINGER
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/67974
Collection生态系统网络观测与模拟院重点实验室_生态系统综合研究中心
Corresponding AuthorFang, Hua-Jun
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Shu-Lan,Fang, Hua-Jun,Yu, Gui-Rui,et al. Foliar and soil N-15 natural abundances provide field evidence on nitrogen dynamics in temperate and boreal forest ecosystems[J]. PLANT AND SOIL,2010,337(1-2):285-297.
APA Cheng, Shu-Lan,Fang, Hua-Jun,Yu, Gui-Rui,Zhu, Tian-Hong,&Zheng, Jiao-Jiao.(2010).Foliar and soil N-15 natural abundances provide field evidence on nitrogen dynamics in temperate and boreal forest ecosystems.PLANT AND SOIL,337(1-2),285-297.
MLA Cheng, Shu-Lan,et al."Foliar and soil N-15 natural abundances provide field evidence on nitrogen dynamics in temperate and boreal forest ecosystems".PLANT AND SOIL 337.1-2(2010):285-297.
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