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题名: Spatial patterns of leaf carbon, nitrogen stoichiometry and stable carbon isotope composition of Ranunculus natans CA Mey. (Ranunculaceae) in the arid zone of northwest China
作者: Li, Zhongqiang1; Yang, Lei1; Lu, Wei1; Guo, Wei1; Gong, Xusheng1; Xu, Jun2; Yu, Dan3
通讯作者: Li, ZQ (reprint author), Hubei Univ, Coll Resources & Environm, Wuhan, Peoples R China.
关键词: Aquatic macrophytes ; Arid zone ; C:N stoichiometry ; Stable isotope composition ; Temperature-plant physiology hypothesis
刊名: ECOLOGICAL ENGINEERING
发表日期: 2015-04-01
DOI: 10.1016/j.ecoleng.2015.01.010
卷: 77, 页:9-17
收录类别: SCI
文章类型: Article
部门归属: [Li, Zhongqiang ; Yang, Lei ; Lu, Wei ; Guo, Wei ; Gong, Xusheng] Hubei Univ, Coll Resources & Environm, Wuhan, Peoples R China ; [Xu, Jun] Chinese Acad Sci, Inst Hydrobiol, Beijing 100864, Peoples R China ; [Yu, Dan] Wuhan Univ, Coll Life Sci, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Technology
类目[WOS]: Ecology ; Engineering, Environmental ; Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology ; Engineering
英文摘要: Leaf carbon concentrations (C%), nitrogen concentrations (N%), carbon-nitrogen ratio (C:N) and stable carbon isotope composition (delta C-13) are key foliar traits with great ecological importance, but few studies have attempted to document the pattern of leaf C%, N%, C:N and delta C-13 value for aquatic macrophytes. In this study, we examined the pattern of leaf C%, N%, C:N and delta C-13 value of Ranunculus natans collected from 26 sites across northwest China, and tried to explore how different environmental conditions affect leaf C%, N%, C: N stoichiometry, and delta C-13 value. Results showed that leaf N%, C:N ratios and delta C-13 varied significantly among the 26 R. natnas collection sites, but leaf C% did not differ significantly. Our study found weak relationships between foliar N% and C: N of R. natans and altitude, latitude and longitude, which indicated that variability in foliar N%, C:N stoichiometry across diverse habitats may result from plant growth, development, metabolism, phenological and life history traits, rather than from variation in geographic environment. We also demonstrated that leaf delta C-13 values displayed a linear increase in altitudinal direction. The differences in delta C-13 values were likely caused by stomatal limitation rather than by nutrient-related changes in photosynthetic efficiency because delta C-13 values in R. natans were not correlated with foliar N concentrations. Our data support the previously proposed temperature-plant physiology hypothesis because there is a negative relationship between leaf N% of R. natans and temperature of water body where R. natans inhabits. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: WATER-USE EFFICIENCY ; N-P STOICHIOMETRY ; PHOSPHORUS STOICHIOMETRY ; NUTRIENT AVAILABILITY ; ENVIRONMENTAL-FACTORS ; GRASSLAND BIOMES ; PLANTS ; DISCRIMINATION ; PHOTOSYNTHESIS ; TERRESTRIAL
语种: 英语
WOS记录号: WOS:000351705100002
ISSN号: 0925-8574
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/23862
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Hubei Univ, Coll Resources & Environm, Wuhan, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Beijing 100864, Peoples R China
3.Wuhan Univ, Coll Life Sci, Wuhan 430072, Peoples R China
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