生态学杂志2017，Vol.36Issue(6)：1570-1577,8.DOI:10.13292/j.1000-4890.201706.025
不同高寒生态系统植物光能利用效率及其环境影响
Light use efficiency of plants and the environmental impact factors in different alpine ecosystems
摘要
Abstract
Light use efficiency is an important indicator of plant photosynthesis,and also is crucial for improving ecosystem productivity.In this study,we selected Zoige Plateau,an ecologically sensitive alpine area,to evaluate the light use efficiency of the dominant plant species in two typical ecosystems,namely alpine meadows and wetlands,and to analyze the impacts of environmental factors on light use efficiency in each ecosystem.The net photosynthetic rate and light use efficiency of Elymus nutans dominated in alpine meadows were higher than those of Carex muliensis dominated in alpine wetlands,but the difference was not significant.Regarding Potentilla anserina,a common species in both ecosystems,the net photosynthetic rate and light use efficiency were higher in alpine wetlands than in alpine meadows.Regression analyses revealed that there were highly significant correlations between the light use efficiency of the two dominant plant species (E.nutans and C.muliensis) and microclimatic and edaphic factors.In contrast,the light use efficiency of the common plant species P.anserina was mainly affected by microclimatic factors only.This study indicated that the light use efficiency varied with alpine plant species.For the dominant species,the light use efficiency was mainly influenced by microclimatic factors,especially air temperature,which was the most important factor affecting the light use efficiency of alpine plants.关键词
高寒生态系统/优势种/光合特性/环境因素Key words
alpine ecosystem/dominant species/photosynthetic characteristic/environmental factor引用本文复制引用
周紫鹃,苏培玺,侍瑞,解婷婷..不同高寒生态系统植物光能利用效率及其环境影响[J].生态学杂志,2017,36(6):1570-1577,8.基金项目
国家重点基础研究发展计划课题(2013CB956604)资助. （2013CB956604）
