【摘要】 利用基于生理生态学过程的EALCO模型,探讨了千烟洲中亚热带人工针叶林生态系统对未来气候变化的响应.结果表明:CO2浓度、温度和降水的变化对该人工林生态系统碳水通量影响的程度不同,其中CO2浓度>温度>降水.CO2浓度是生态系统总光合生产力(GPP)的主要驱动因子,温度与CO2浓度均是控制生态系统呼吸的主要环境因子,温度的升高使植物地上部分呼吸明显增加,而CO2浓度升高则对土壤呼吸影响较大.温度升高使蒸散(ET)增加,而CO2浓度升高则使ET减少.在未来气候变化情景(2100年)下,该人工林生态系统的净初级生产力将增加22%,说明其仍具有较强的固碳潜力.更多还原

【Abstract】 The responses of subtropical conifer plantation to climate change scenarios were investigated in Qianyanzhou by the process-based physiological-ecological model EALCO(ecological assimilation of land and climate observation).The results showed that CO2 concentration had the greatest effects on the carbon and water fluxes of the plantation,followed by temperature,and precipitation.CO2 concentration was the main driving factor for the gross photosynthesis productivity of this plantation ecosystem,and temperature and CO2 concentration were the key environmental factors controlling the ecosystem respiration.Increasing temperature accelerated the respiration of aboveground part dramatically,while increasing CO2 concentration had greater effects on soil respiration.The evapotranspiration was enhanced by increasing temperature,but reduced by increasing CO2 concentration.Under the future climate changing scenario(the year 2100),the net primary productivity of this plantation ecosystem would be increased by 22%,suggesting that this ecosystem is still capable of sequestrating carbon.更多还原