地质历史时期低CO2大气浓度对陆生植物的影响

Effects of Geological Low Carbon Dioxide Atmospheric Concentration on Terrestrial Plants

【目的】低CO_2大气浓度对陆生植物的影响研究对预测CDAC升高的潜在影响、评估群落组成的动态变化和生态系统功能、从进化时间尺度上探讨全球气候变化下陆地生态系统的碳循环均具有十分重要的意义。【方法】综合分析低CDAC对植物个体和生态系统的影响、植物的进化适应及低CDAC与其他环境因子的相互作用。【结果】低CDAC对植物的存活、生长和繁殖等方面表现出极大的限制性影响,不利于森林生态系统的发展,并与水分、温度以及营养供给等因素协同对植物产生影响。【结论】植物对地质历史时期低CDAC的进化适应可能限制了植物对将来CDAC升高的响应,相关研究值得深入开展。

[Purposes]Predictions of plant and ecosystem responses to rising carbon dioxide atmospheric concentration（CDAC）and future climate change would benefit from a better understanding of plantsresponses to a range from low to high CDAC representing historic to future time periods.[Methods]Effects of low CDAC on individuals growth and physiological traits,plants evolution and adaptation,the interactive effects of low CDAC and other factors were studied here.[Findings]Low CDAC had a great restriction on the survival,growth and reproduction of plants,and the development of forest ecosystem,interacted with the water,temperature and nutrition.[Conclusions]The adaptation of plants to past low CDAC during the long time evolution may constrain their responses to rising CDAC in the future.It needs further research in the future.