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作 者 ：米娜^1，2;于贵瑞²;温学发²;孙晓敏²;王树森³

期 刊 ：应用生态学报 2008年 19卷 09期 页码：1877-1883

关键词：热带；

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.

Abstract:The responses of subtropical conifer plantation to climate change scen
arios 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 in
creased by 22%, suggesting that this ecosystem is still capable of sequestrating carbon.

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