桂林岩溶石山檵木群落老龄林植物叶性状
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摘要
该研究以桂林岩溶石山檵木群落老龄林的25种主要植物为对象,通过测定其叶干质量(DW)、叶干物质含量(LDMC)、叶面积(LA)、叶厚度(LT)、比叶面积(SLA)和叶组织密度(LTD)等叶性状指标,探讨不同物种叶性状的差异以及性状之间的内在联系。结果表明:DW、LDMC、LA、LT、SLA和LTD在乔木层8种植物之间以及灌木层17种植物之间均呈极显著差异(P<0.01)。乔木层植物叶片具有相对较大的DW、LDMC和LT,灌木层植物叶片具有相对较大的SLA,乔木层和灌木层植物叶片LA和LTD的差异不显著。Pearson相关性分析表明,乔木层与灌木层植物叶性状相关性除LTD与LDMC和LA,SLA与LA不一致外,其他性状两两之间相关性均表现为一致性。主成分分析表明,在6个叶性状指标中,DW、LDMC和LTD可以作为反映岩溶石山檵木群落老龄林乔木层植物适应生境的重要叶性状指标,主要表征植物抵御外界干扰及不利环境的能力和对生长环境干湿程度适应的能力,具有"缓慢投资-收益"叶经济谱的特点。SLA和LTD可以作为反映岩溶石山檵木群落老龄林灌木层植物适应生境的重要叶性状指标,主要表征植物获取资源的能力,具有"快速投资-收益"叶经济谱的特点。
The leaf traits including leaf dry weight( DW),leaf dry matter content( LDMC),leaf area( LA),leaf thickness( LT),specific leaf area( SLA) and leaf tissue density( LTD) of the 25 dominant plants in karst hills of Guilin,China,were measured to examine the trait differences among species and their intrinsic relationships,and to discuss the mechanisms of plants adapting to the karst hills at the old-growth forest stage of Loropetalum chinense community. The results showed that the DW,LDMC,LA,LT,SLA and LTD were significantly different among eight species of plants in tree layer and among seventeen species in shrub layer( P <0.01). The plant species in tree layer had higher DW,LDMC and LT but lower SLA than those in the shrub layer. There was no significant difference in LA and LTD between tree layer and shrub layer species. Pearson correlation analysis showed that the correlations among leaf traits were consistent both in tree layer and in shrub layer except for the relationships of LA with LTD,LDMC and SLA. The principal component analysis shows that among the six leaf traits,DW,LDMC,and LTD might be used as important leaf traits to reflect the adaptations of plants in the tree layer at old-growth forest stage of L. chinense community in karst hills,which mainly represented the ability of plants to resist external disturbances and unfavorable environments and adapt to dry and wet environments. It has the characteristics of"slow investment-income"leaf economic spectrum. SLA and LTD might be used as important leaf traits to reflect the adaptations of plants in the shrub layer at old-growth forest stage of L. chinense community in karst hills,which mainly showed the ability of plants to acquire resources and had the characteristics of"fast investment-income"leaf economic spectrum.
The leaf traits including leaf dry weight( DW),leaf dry matter content( LDMC),leaf area( LA),leaf thickness( LT),specific leaf area( SLA) and leaf tissue density( LTD) of the 25 dominant plants in karst hills of Guilin,China,were measured to examine the trait differences among species and their intrinsic relationships,and to discuss the mechanisms of plants adapting to the karst hills at the old-growth forest stage of Loropetalum chinense community. The results showed that the DW,LDMC,LA,LT,SLA and LTD were significantly different among eight species of plants in tree layer and among seventeen species in shrub layer( P <0.01). The plant species in tree layer had higher DW,LDMC and LT but lower SLA than those in the shrub layer. There was no significant difference in LA and LTD between tree layer and shrub layer species. Pearson correlation analysis showed that the correlations among leaf traits were consistent both in tree layer and in shrub layer except for the relationships of LA with LTD,LDMC and SLA. The principal component analysis shows that among the six leaf traits,DW,LDMC,and LTD might be used as important leaf traits to reflect the adaptations of plants in the tree layer at old-growth forest stage of L. chinense community in karst hills,which mainly represented the ability of plants to resist external disturbances and unfavorable environments and adapt to dry and wet environments. It has the characteristics of"slow investment-income"leaf economic spectrum. SLA and LTD might be used as important leaf traits to reflect the adaptations of plants in the shrub layer at old-growth forest stage of L. chinense community in karst hills,which mainly showed the ability of plants to acquire resources and had the characteristics of"fast investment-income"leaf economic spectrum.
引文
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LIU HW,LIU WD,WANG W,et al.,2015.Leaf traits and nutrient resorption of major woody species in the karst limestone area of Chongqing[J].Acta Ecol Sin,35(12):4071-4080.[刘宏伟,刘文丹,王微,等,2015.重庆石灰岩地区主要木本植物叶片性状及养分再吸收特征[J].生态学报,35(12):4071-4080.]
MA JM,CHEN T,LIANG SC,2011.Leaf traits of 14 dominant arbuscle and liana species in karst hills of Guilin[C].International Conference on Remote Sensing,Environment and Transportation Engineering.Nanjing:7653-7655.
MA JM,HUANG J,YANG DL,et al.,2015.Leaf photosynthetic pigment contents and quantitative evaluation of shade tolerance among 50 plant species on karst rocky mountain in Guilin[J].Sci Silv Sin,51(10):67-74.[马姜明,黄婧,杨栋林,等,2015.桂林喀斯特石山50种常见植物叶片光合色素含量及耐荫性定量评价[J].林业科学,51(10):67-74.]
MA JM,WU M,ZHAN TT,et al.,2013.Changes of species composition and diversity among restoration stages of Loropetalum chinense communities in karst area of Lijiang River valley[J].Ecol Environ Sci,22(1):66-71.[马姜明,吴蒙,占婷婷,等,2013.漓江流域岩溶区檵木群落不同恢复阶段物种组成及多样性变化[J].生态环境学报,22(1):66-71.]
MA JM,ZHAN TT,MO ZY,et al.,2012a.Changes of niche among restoration stages of Loropetalum chinense communities in karst area of Lijiang River Valley[J].Acta Bot BorealOccident Sin,32(12):2530-2536.[马姜明,占婷婷,莫祖英,等,2012a.漓江流域岩溶区檵木群落不同恢复阶段主要共有种生态位变化[J].西北植物学报,32(12):2530-2536.]
MA JM,ZHANG XZ,LIANG SC,et al.,2012b.Leaf traits of common plants in Yaoshan Mountain of Guilin,China[J].JGuangxi Norm Univ(Nat Sci Ed),30(1):77-82.[马姜明,张秀珍,梁士楚,等,2012b.桂林尧山常见植物叶片性状研究[J].广西师范大学学报(自然科学版),30(1):77-82.]
PAN YF,CHEN XB,JIANG Y,et al.,2018.Changes in leaf functional traits and soil environmental factors in response to slope gradient in karst hills of Guilin[J].Acta Ecol Sin,38(5):1581-1589.[盘远方,陈兴彬,姜勇,等,2018.桂林岩溶石山灌丛植物叶功能性状和土壤因子对坡向的响应[J].生态学报,38(5):1581-1589.]
QIN YH,MA JM,MEI JL,et al.,2017.The initial dynamic of litter decomposition of Loropetalum chinense communities among different recovery stages in karst area of Lijiang River watershed[J].Acta Ecol Sin,37(20):6792-6799.[覃扬浍,马姜明,梅军林,等,2017.漓江流域岩溶区檵木群落不同恢复阶段凋落物分解初期动态[J].生态学报,37(20):6792-6799.]
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