干旱区生态环境知识资源中心(Arid): 内蒙古荒漠草原植物叶片功能性状关系及其经济谱分析

Arid

	内蒙古荒漠草原植物叶片功能性状关系及其经济谱分析
其他题名	Analysis of relationships among leaf functional traits and economics spectrum of plant species in the desert steppe of Nei Mongol
	于鸿莹; 陈莹婷; 许振柱; 周广胜
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2014
卷号	38 期号:10 页码:1029-1040
中文摘要	气候变化和人为干扰导致草原荒漠化加剧,引发了严重的环境问题。因此, 对荒漠草原植物与环境变化关系的研究愈加迫切, 分析比较荒漠草原不同功能型物种叶片经济谱具有重要意义。该研究通过测定内蒙古荒漠草原生态系统不同功能型植物叶片的光合及叶绿素荧光参数、比叶面积和叶片氮素含量, 验证了荒漠草原植物叶片经济谱的存在, 明确了各功能型植物叶片性状间的关系及其在叶片经济谱中的位置。荒漠草原不同功能型植物叶片性状差异明显, 草本植物的比叶面积(SLA)、单位质量叶氮含量(N_(mass))分别是灌木的2.39倍和1.20倍; 一年生植物单位面积最大净光合速率(A_(area))、SLA、光合氮利用效率(PNUE)分别是多年生植物的1.93倍、2.13倍和4.24倍; C_4植物的A_(area)、SLA、PNUE分别是C_3植物的2.25倍、1.73倍和3.61倍。除A_(area)与单位面积叶氮含量(N_(area))、PSII的实际光化学效率(Phi_(PSII))与SLA之间不存在显著相关关系外, 叶片性状间存在广泛的相关关系, 且均达到极显著水平。这验证了叶片经济谱在内蒙古荒漠草原植物中也同样存在。进一步分析表明, 一年生植物、草本植物、C_4植物叶片在叶片经济谱中位于靠近薄叶、光合能力强、寿命短的一端; 而多年生植物、灌木、C_3植物叶片靠近厚叶、光合能力弱、寿命长的一端。这说明荒漠草原中不同功能型植物可通过权衡其经济性状间的关系而采取不同的适应策略, 对于荒漠草原生态系统管理具有重要的理论指导意义。
英文摘要	Aims Grassland desertification is being accelerated because of adverse climate change effects and unsustainable land uses, resulting in several major environmental problems. However, there are few studies on the economics spectrum of different plant functional types in desert steppe. The objectives of the current study are to examine the relationships among leaf functional traits of native plant species, to compare the functional traits among different plant functional types, and to determine whether an economic spectrum exists for the majority of species in the desert steppe of Damao Banner, Nei Mongol, China. Methods Photosynthetic and chlorophyll fluorescence parameters, specific leaf area (SLA), and leaf nitrogen contents across 24 species of different functional types were measured in situ in the desert steppe ecosystem. Non-parametric tests were used to analyze leaf trait differences in plant species of different functional types. Linear regression analysis was used to determine the relationships among leaf traits in different plant species. Finally,a comprehensive analysis on these leaf traits in different plant species was conducted using the principal component analysis. All data analyses were performed using SPSS 16.0 (SPSS, Chicago, USA). Important findings Significant differences among plant functional types were found in most of the leaf traits. SLA and mass-based nitrogen concentration (N_(mass)) in grasses were 2.39 and 1.20 folds, respectively, of that in shrubs; area-based photosynthetic capacity (A_(area)), SLA, and photosynthetic nitrogen use efficiency (PNUE) in annual species were 1.93, 2.13, and 4.24 folds, respectively, of that in perennial species; and A_(area), SLA, and PNUE in C_4 species were 2.25, 1.73, and 3.61 folds, respectively, of that in C_3 species. Almost all relationships significantly differed (p < 0.01) among the leaf traits, with exception of the relationships between A_(area) and area-based nitrogen concentration (N_(area)) and between quantum yield of PSII electron transport (Phi_(PSII)) and SLA, implying that an economic spectrum may exist in the desert steppe ecosystem. The relationships of N_(area), mass-based photosynthetic capacity (Amass), and PNUE with SLA were most significantly strong (R~2 = 0.54, 0.62, 0.60, respectively; p < 0.01). Results in this study suggest that the annuals, grasses, and C_4 species might be located at the end of the leaf economic spectrum with high area-based photosynthetic rate, high nitrogen concentration on mass basis, short leaf lifespan, and high SLA; whereas the perennials, shrubs, and C_3 species could be located at the another end of the economic spectrum with contrasting traits.
中文关键词	荒漠草原 ; 叶片经济谱 ; 叶片功能性状 ; 内蒙古 ; 植物功能型
英文关键词	desert steppe leaf economics spectrum leaf functional trait Nei Mongol plant functional type
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5282369
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232027
作者单位	中国科学院植物研究所, 植被与环境变化国家重点实验室, 北京 100093, 中国
推荐引用方式 GB/T 7714	于鸿莹,陈莹婷,许振柱,等. 内蒙古荒漠草原植物叶片功能性状关系及其经济谱分析[J]. 中国科学院植物研究所,2014,38(10):1029-1040.
APA	于鸿莹,陈莹婷,许振柱,&周广胜.(2014).内蒙古荒漠草原植物叶片功能性状关系及其经济谱分析.植物生态学报,38(10),1029-1040.
MLA	于鸿莹,et al."内蒙古荒漠草原植物叶片功能性状关系及其经济谱分析".植物生态学报 38.10(2014):1029-1040.