干旱区生态环境知识资源中心(Arid): 羌塘高原降水梯度植物叶片、根系性状变异和生态适应对策

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	羌塘高原降水梯度植物叶片、根系性状变异和生态适应对策
其他题名	Variation of leaf and root traits and ecological adaptive strategies along a precipitation gradient on Changtang Plateau
	赵广帅 1; 刘珉 2; 石培礼 3; 宗宁 4; 张鑫 2; 张宪洲 3
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:1 页码:295-309
中文摘要	叶片和根系是植物获取资源的最重要的器官,其性状随环境梯度的变化反映了植物光合碳获取和水分与养分的吸收能力及其对环境变化适应的生态对策。羌塘高原降水梯度带高寒草地群落叶片和根系成对性状关系研究不仅能揭示环境梯度对植物性状的塑造作用,也可为理解寒、旱和贫瘠等极端环境下植物的适应策略提供依据。为此,选择3组具有代表性的叶片和根系成对性状:比叶面积(SLA)和比根长(SRL);单位质量叶氮含量(LN_(mass))和单位质量根氮含量(RN_(mass));单位面积叶氮含量(LN_(area))和单位长度根氮含量(RN_(length)),分析不同优势植物地上、地下成对性状变异特征及其与环境因子的关系,探讨植物性状对高寒生态系统水分和养分限制因素的适应策略。研究表明,区域气候和土壤环境导致的叶片性状变异大于根系性状的变异,干旱端的植物既具有高的SRL,又具有高的叶片和根系的养分含量(LN_(mass),LN_(area)和RN_(mass))。SLA-SRL、LN_(mass)-RN_(mass)、LN_(area)- RN_(length)均表现为权衡关系,在干旱端(年降雨量MAP<400 mm)的高寒草原、荒漠草原和极湿润端(MAP>600 mm)的高寒草甸这种权衡关系更为明显,而中间区域(400
英文摘要	Leaves and roots are the most important organs for plants to acquire resources.Trait variations across environmental gradients reflect photosynthetic carbon acquisition,the water and nutrient absorption capacity of plants,and their ecological strategies for adapting to environmental changes.Studying leaf and root pairwise traits of alpine grassland communities along a precipitation gradient on Changtang Plateau can not only reveal the shaping effect of environmental gradients on plant traits but also provide a basis for understanding the adaptation strategies of plants in extreme environments such as cold,drought,and barren land.Therefore,we selected three representative pairwise leaf and root traits: specific leaf area(SLA)and specific root length(SRL),unit mass leaf nitrogen content(LN_(mass))and unit mass root nitrogen content(RN_(mass)),leaf nitrogen content per unit leaf area(LN_(area))and root nitrogen content per unit root length(RN_(length)),to analyse the variation in characteristics of above-ground and below-ground pairwise traits of different dominant plants and their relationship with environmental factors.We also explored the adaptation strategies of plant traits to water and nutrient limitations in alpine ecosystems.The results showed that variations in leaf traits caused by regional climate and soil environments were greater than those in root traits.The plants at the dry end had both high SRL and high nutrient contents in the leaves and roots(LN_(mass),LN_(area),and RN_(mass)).The SLA-SRL,LN_(mass)-RN_(mass),and LN_(area)-RN_(length) all showed a trade-off relationship,especially in the alpine steppe and desert steppe at the dry end(annual rainfall MAP <400 mm),and alpine meadow under extremely humid conditions(MAP >600 mm).However,in the middle region(400
中文关键词	羌塘高原 ; 降水梯度 ; 叶片和根系性状 ; 协同 ; 权衡 ; 生态适应对策
英文关键词	Changtang Plateau precipitation gradient leaf and root traits coordination trade-off ecological adaptive strategy
语种	中文
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6674484
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318448
作者单位	1.中国科学院地理科学与资源研究所;;国家林业和草原局经济发展研究中心, 中国科学院生态系统网络观测与模拟重点实验室;;, ;;, 北京;;北京 100101;;100714, 中国; 2.国家林业和草原局经济发展研究中心, 北京 100714, 中国; 3.中国科学院地理科学与资源研究所;;中国科学院大学资源与环境学院, 中国科学院生态系统网络观测与模拟重点实验室;;, ;;, 北京;;北京 100101;;100190, 中国; 4.中国科学院地理科学与资源研究所, 中国科学院生态系统网络观测与模拟重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	赵广帅,刘珉,石培礼,等. 羌塘高原降水梯度植物叶片、根系性状变异和生态适应对策[J]. 中国科学院地理科学与资源研究所,2020,40(1):295-309.
APA	赵广帅,刘珉,石培礼,宗宁,张鑫,&张宪洲.(2020).羌塘高原降水梯度植物叶片、根系性状变异和生态适应对策.生态学报,40(1),295-309.
MLA	赵广帅,et al."羌塘高原降水梯度植物叶片、根系性状变异和生态适应对策".生态学报 40.1(2020):295-309.