文献类型：期刊文献

中文题名：湘西青冈栎次生林林下主要木本植物的生态策略

英文题名：Ecological strategies of main understory woody plants in the Cyclobalanopsis glauca secondary forest in west Hunan

作者：石朔蓉[1] 齐梦娟[1] 王书韧[1] 白彦峰[1] 王辉[1] 王景弟[2] 姜春前[1]

第一作者：石朔蓉

机构：[1]中国林业科学研究院林业研究所,北京100091;[2]慈利县林业局,湖南慈利427200

年份：2022

卷号：42

期号：3

起止页码：53-61

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家重点研发计划项目(2017YFC0505604)。

语种：中文

中文关键词：植物生态策略;叶功能性状;CSR策略;亚热带常绿阔叶林

外文关键词：plant ecological strategy;leaf functional traits;CSR theory;subtropical evergreen broadleaved forest

分类号：S718.52

摘要：【目的】研究植物的生态策略能了解植物在环境中利用资源的方式及生态系统功能,为生态恢复、森林经营及生物多样性保育的植物筛选及应用工作提供理论依据。【方法】以湘西天心阁青冈栎次生林13个25 m×40 m的固定样地植被调查数据为基础,以林下自然更新的主要木本植物为研究对象,对叶面积(LA)、叶干物质含量(LDMC)、比叶面积(SLA)、叶氮含量(LNC)及叶磷含量(LPC)5个叶功能性状进行测量及分析,并用CSR策略模型的方法分析植物生态策略。【结果】31种林下主要木本植物可分为8种生态策略类型,分别是C/CS、C/CSR、CS、CS/CSR、CSR、S、S/CS、S/CSR型策略,不同生态策略在C、S、R3种策略上的投资占比不同。其中,物种数较多有S/CS、CS/CSR、C/CSR型策略,分别占总物种数的25.8%、19.4%及19.4%。叶功能性状分析显示,不同生态策略植物在LA、LDMC及SLA性状上差异显著(P<0.05),靠近R策略一端的植物倾向采取低LDMC、高SLA的快速投资收益型性状组合,而靠近S策略一端的植物倾向于高LDMC、低SLA的高构建成本型性状组合。31种林下主要木本植物的相对重要值与R及S策略显著相关(P<0.05),相对重要值高的物种在与胁迫忍耐能力相关的S策略上投资占比更高。【结论】湘西青冈栎次生林中存在多种生态策略类型,采取保守型资源策略、胁迫忍耐能力好的物种有更大的生存空间。
【Objective】Ecological strategies of plants are closely related to the way plants use resources in the environment and ecosystem functions.Studying ecological strategies can provide a theoretical basis for plant selection and application in ecological restoration,forest management and biodiversity conservation.【Method】Based on the vegetation survey of 13 plots with the size of 25 m×40 m in the Cyclobalanopsis glauca secondary forest,located in Tianxinge in west Hunan,five leaf functional traits of the main woody plants were measured and analyzed,including leaf area,leaf dry mass content,specific leaf area,leaf nitrogen concentration and leaf phosphorus concentration.Then the ecological strategies were analyzed by StrateFy.【Result】The 31 main understory woody plants were divided into 8 types of ecological strategies:C/CS、C/CSR、CS、CS/CSR、CSR、S、S/CS、S/CSR,among which S/CS、CS/CSR、C/CSR were the dominant strategies,accounting for 25.8%,19.4%and 19.4%.The investment proportions of C,S and R were different in the 8 ecological strategies.The analysis of leaf functional traits showed that there were significant differences in LA,LDMC and SLA among different ecological strategies(P<0.05).The plants clustered around R strategy tended to choose the combination of low LDMC and high SLA,which sustained fast investment returns,while the plants clustered around S strategy had an opposite selection.The relative importance values were significantly correlated with the R and S strategies(P<0.05).Species with high relative importance values invested more in the S strategy related to stress tolerance.【Conclusion】There are various ecological strategies in the Cyclobalanopsis glauca secondary forest,and species with conservative resource strategies and good stress tolerance get more ecological space to survive.