铜绿微囊藻生长过程中CO_2通量及其影响因素分析  

Analysis on carbon dioxide flux and its influencing factors during the growth of Microcystis aeruginosa

作　　者：蒋哲[1] 胡湛波[1,2] 刘恺华 陆晖[1] 杨瓯蒙 王璀[1] 

机构地区：[1]广西大学环境学院,广西南宁530004 [2]广西南方流域生态治理研究院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2015年第3期578-584,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：广西自然科学基金资助项目(2013GXNSFAA019278);南宁市科学研究与技术开发计划(20123112;20132303);南宁市环境保护专项资金(南财经[2012]308号)

摘　　要：采用静态箱-气相色谱法对铜绿微囊藻生长过程中水-气界面CO2通量进行18 d连续观测,同时监测表层水体相关指标。实验结果表明:铜绿微囊藻生长过程中表层水体经历了"碳源"到"碳汇",CO2通量值在4天后出现大幅变化且由正转负,水体表现为较强的固碳能力,其最大值出现在第7天,吸收通量为-8.89 mg/(m2·min),实验期间CO2通量均值为-4.1 mg/(m2·min)。利用偏最小二乘回归分析法对各监测数据进行回归分析:CO2通量主要影响因素有比增值速率、氨氮与p H。CO2通量与p H呈负相关关系,CO2通量与氨氮呈现正相关关系,铜绿微囊藻在低氨氮浓度下能够更好地生长。铜绿微囊藻的增值作用是控制CO2通量的关键因素。18 day variation of carbon dioxide flux on the water-air interface during the growth of Mi-crocystis aeruginosa was observed using statistic box-gas chromatography method, and related index in the surface water was measured. The results show that the surface of water had undergone a source-sink for carbon dioxide. The value of carbon dioxide flux with significant change on the 4th day from positive to negative. The water had undergone an intensity source-sink for carbon dioxide. A maximum value of carbon dioxide flux was observed of -8. 98mg/m2 ·min on the 7th day. The mean value of carbon dioxide flux was -4. 1 mg/m2 ·min during the experiment. The partial least squares regression analysis reveals that the main factors of carbon dioxide flux was μ NH3-N and pH. A negative relationship was observed between the pH and the carbon dioxide flux. A positive relationship between the NH3 -N and carbon dioxide flux was found. The Microcystis aerugiuosa had a high efficiency of growth and photosynthesis with a low concentration of NH3 -N. The growth of Microcystis aeruginosa in the surface water was the key factor for controlling the carbon dioxide flux.

关 键 词：铜绿微囊藻 水-气界面 CO2通量 偏最小二乘法 

分 类 号：X171.1[环境科学与工程—环境科学]