寒温带落叶松幼苗针叶性状特征对雪被变化的适应

Adaptation of Needle Leaf Characteristics of Larch Seedlings to Changes on Snow Cover in Cold Temperate Zone

植物通过其功能性状来反映对生长环境的响应和适应,植物功能性状也是植物与环境之间相互作用的结果。植物生活史的对策,物种的共存和生物多样性的维持都要由植物功能性状之间的关系决定。为探究雪被特征对落叶松幼苗早期生长特征和功能性状的影响,以寒温带原始林中典型落叶树种落叶松幼苗为试验对象,研究正常雪被深度:(10~15 cm)、两倍雪被深度(20~30 cm)和去除雪被(0 cm)对不同幼苗早期(2~3年生)生长特征和功能性状的影响。结果表明,雪被增加可以增大寒温带落叶松幼苗的叶面积、比叶面积和生物量。本项目实验结果也验证了生态学中生境过滤是驱动寒温带落叶松林群落构建的关键因子,对揭示雪被影响落叶松幼苗更新机制具有重要意义。

Plants reflect their response and adaptation to the growth environment through their functional traits,which are also the result of the interaction between plants and the environment.The strategies for plant life history,species coexistence,and biodiversity maintenance are all determined by the relationship between plant functional traits.To investigate the effects of snow cover characteristics on the early growth characteristics and functional traits of larch seedlings,a typical deciduous tree species,larch seedlings,was selected as experimental subjects to study the effects of normal snow cover depth(10~15 cm),double snow cover depth(20~30 cm),and removal of snow cover(0 cm)on the early growth characteristics and functional traits of different seedlings(2~3 years old).The results indicate that increasing snow cover can increase the leaf area,specific leaf area,and biomass of larch seedlings in the cold temperate zone.The experimental results of this project also verified that habitat filtration is a key factor driving the construction of larch forest communities in the cold temperate zone in ecology,which is of great significance in revealing the mechanism of snow cover affecting the regeneration of larch seedlings.