摘要
功能性状是联系植物、环境与生态系统的重要特性,对指示生存环境变化有深远的意义。以5种常绿园林树种红叶石楠(Photinia×fraseri)、金边黄杨(Euonymus japonicus‘Aurea⁃marginatus’)、香樟(Cinnamo⁃mum camphora)、女贞(Ligustrum lucidum)和桂花(Osmanthus fragrans)为对象,选择14项植物叶片和细根形态、生理及养分性状指标,分析其沿城乡环境梯度的变异特点以及地上地下部分的相关性,旨在了解不同园林树种在城乡环境梯度下的生存适应策略。结果表明:不同树种的功能性状变异较大,叶片形态在城乡间无显著差异,生理指标及根、叶碳含量在城乡间呈递增趋势;地上及地下部分的形态性状变化在环境梯度间并未表现出协同一致;根据主成分分析结果和植物经济型谱理论,乡村环境下园林树种的细根偏向于采取“保守型”策略,整株的生存策略偏向于“缓慢投资⁃收益”型,而在城市环境下并未发现这一生存策略。表明城市化可能会增强植物获取生长和生产资源的能力。
Functional traits are important characteristics that link plants,environment and ecosystems,with a far⁃reaching significance for indicating environmental changes.In this study,we measured 14 morphological,physio⁃logical,and nutrient traits of leaf and fine⁃root in five garden evergreen tree species,Photinia×fraseri,Euonymus japonicas‘Aurea⁃marginatus’,Cinnamomum camphora,Ligustrum lucidum,and Osmanthus fragrans.The differ⁃ential variations of traits across an urban⁃rural environmental gradient and the correlation between leaf traits and root traits were analyzed to reveal the survival and adaptation strategies of these species.The results showed that morpho⁃logical traits of different tree species differed greatly.There were no significant differences in the leaf morphological traits along the urban⁃rural gradient.The physiological traits showed an increasing trend along the urban⁃rural gradi⁃ent,and the similar trend was observed for carbon contents in fine roots and leaves.According to the results of prin⁃cipal component analysis and the theory of plant economic spectrum,the fine roots of the garden tree species tended to adopt a“conservative”strategy,and the survival strategy of tree species as whole appeared“slow investment⁃return”type in the rural sites.This survival strategy was not found in the urban sites.Our findings indicate that urbanization may strengthen the resource acquisition ability of plants for growth and production.
作者
陈蕾如
马锐豪
王斐
夏开
邓鹏飞
徐小牛
CHEN Leiru;MA Ruihao;WANG Fei;XIA Kai;DENG Pengfei;XU Xiaoniu(College of Forestry and Land-scape Architecture,Anhui Agricultural University,Hefei 230036,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2023年第6期1281-1289,共9页
Chinese Journal of Ecology
基金
国家自然科学基金项目(31770672和31370626)资助。
关键词
植物功能性状
城乡梯度
生存策略
叶
细根
园林树木
plant functional trait
urban⁃rural gradient
survival strategy
leaf
fine root
garden tree
