基于功能性状的铁杆蒿对环境变化的响应与适应

应用生态学报

基于功能性状的铁杆蒿对环境变化的响应与适应

戚德辉¹,温仲明^1，2，3**,杨士梭²,王红霞²,郭茹^{3 }

(¹西北农林科技大学资源环境学院, 陕西杨凌 712100; ²西北农林科技大学水土保持研究所, 陕西杨凌 712100; ³中国科学院教育部水土保持与生态环境研究中心, 陕西杨凌 712100)

出版日期:2015-07-18 发布日期:2015-07-18

Traitbased responses and adaptation of Artemisia sacrorum to environmental changes.

QI De-hui¹, WEN Zhong-ming^1，2，3, YANG Shi-suo², WANG Hong-xia², GUO Ru^3

(¹College of Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China; ²Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China; ³Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences, Yangling 712100, Shaanxi, China)

Online:2015-07-18 Published:2015-07-18

摘要/Abstract

摘要： 以延河流域3个植被区(森林区、森林草原区及典型草原区)稳定的自然植物群落中的铁杆蒿为研究对象，测定铁杆蒿的比叶面积、叶组织密度、叶氮含量、叶磷含量、叶氮磷比、比根长、细根组织密度、细根氮含量、细根磷含量、细根氮磷比10项能够反映植物生存对策且易于测量的功能性状，研究了不同生境下铁杆蒿功能性状的种内差异，以及气象因子和地形因子对铁杆蒿植物功能性状的影响，并分析了各功能性状间的相关关系.结果表明：铁杆蒿各功能性状中除了叶磷含量、叶氮磷比、比根长、根组织密度和根氮磷比在各植被带间的差异显著外，其他5个性状差异均不显著.各性状在坡度、坡向间的差异不显著.比叶面积与叶组织密度呈显著负相关，比根长与根组织密度和根氮磷比呈显著负相关，根组织密度与根氮含量和根氮磷比呈显著正相关，叶组织密度、叶氮含量和叶氮磷比与其他功能性状的相关性不显著.表明铁杆蒿对恶劣环境的适应是通过叶片和细根功能性状间的相互作用和调节实现的.不同环境因素在不同程度上对铁杆蒿功能性状产生影响，对铁杆蒿功能性状影响大小依次是年均降雨量、年均温和年均蒸发量.

Abstract: The paper focused on Artemisia sacrorum in the stable natural plant community in three vegetation zones (forest, forest steppe and steppe) in the Yanhe River catchment. The following plant functional traits were measured at each sample site, i.e., specific leaf area (SLA), leaf tissue density (LTD), leaf nitrogen concentration (LNC), leaf phosphorus concentration (LPC), leaf nitrogen phosphorus ratio (LNP), specific root length (SRL), root tissue density (RTD), root nitrogen concentration (RNC), root phosphorus concentration (RPC) and root nitrogen phosphorus ratio (RNP). These 10 plant functional traits were chosen because they were easily measurable and adequately reflected plant survival strategies. We analyzed intraspecific differences in A. sacrorum functional traits in the different habitat zones, and the influence of climate and terrain factors on A. sacrorum functional traits. We also studied the relationships among A. sacrorum plant functional traits. The results showed that some A. sacrorum functional traits were significantly different among sample sites, such as LPC, LNP, SRL, RTD and RNP, while the other 5 functional traits had no significant differences. The functional traits were not significantly different between sites with different slopes and aspects. SLA was very significantly negatively correlated with LTD, SRL was significantly negatively correlated with RTD and RNP, RTD was significantly positively correlated with RNC and RNP, and there were no significant relationships among LTD, LNC and LNP and the other functional traits. This showed that A. sacrorum adapted to the environment by coordinating adjustment among leaf and root functional traits. Different climate factors had different effects on plant traits, with the effects of mean annual precipitation > mean annual temperature > annual average evaporation capacity.

戚德辉1,温仲明1，2，3**,杨士梭2,王红霞2,郭茹3 . 基于功能性状的铁杆蒿对环境变化的响应与适应[J]. 应用生态学报.

QI De-hui1, WEN Zhong-ming1，2，3, YANG Shi-suo2, WANG Hong-xia2, GUO Ru3. Traitbased responses and adaptation of Artemisia sacrorum to environmental changes.[J]. Chinese Journal of Applied Ecology.