Chen Xiao-feng, Jiang Hong, Niu Xiao-dong, Zhang Jin-meng, Liu Yu-li, Fang Cheng-yuan
Ying Yong Sheng Tai Xue Bao. 2016 Feb;27(2):335-44.
The carbon flux of subtropical bamboo forest ecosystem was continuously measured using eddy covariance technique in Anji County of Zhejiang Province, China. The monthly net ecosystem productivity (NEP), ecosystem respiration (Re) and gross ecosystem productivity (GEP) data from 2011 to 2013 were selected to analyze the impacts of seasonal high temperature and drought on the carbon flux of bamboo forest ecosystem. The results showed that there were big differences among annual NEP of bamboo forest from 2011 to 2013. Because of the asynchronization of precipitation and heat, the seasonal high temperature and drought in July and August of 2013 caused significant decline in NEP by 59.9% and 80.0% when compared with the same months in 2011. Correlation analysis of the NEP, Re, GEP and environmental factors suggested that the atmosphere temperatures were significantly correlated with Re and GEP in 2011 and 2013 (P<0.05). However, to air and soil moisture, Re and GEP had different responses, that was, GEP was more vulnerable by the decrease of the soil moisture compared with Re. Besides, the raising of saturation vapour pressure promoted the Re modestly but inhibited the GEP, which was supposed to be the main reason for NEP decrease of bamboo forest ecosystem in Anji, from July to August in 2013.
利用涡度相关技术对中国浙江省安吉县亚热带竹林生态系统的碳通量进行了连续观测。选取2011年至2013年的月净生态系统生产力（NEP）、生态系统呼吸（Re）和总生态系统生产力（GEP）数据，分析季节性高温和干旱对竹林生态系统碳通量的影响。结果表明，2011年至2013年竹林年NEP差异较大。由于降水和热量的不同步，2013年7月和8月的季节性高温和干旱导致NEP与2011年同期相比显著下降，分别下降了59.9%和80.0%。对NEP、Re、GEP与环境因子的相关性分析表明，2011年和2013年气温与Re和GEP显著相关（P<0.05）。然而，对于空气和土壤湿度，Re和GEP有不同的响应，即与Re相比，GEP更容易受到土壤湿度下降的影响。此外，饱和水汽压的升高对Re有适度的促进作用，但对GEP有抑制作用，这可能是2013年7月至8月安吉竹林生态系统NEP下降的主要原因。
