农业环境科学学报
農業環境科學學報
농업배경과학학보
Journal of Agro-Environment Science
2014年
11期
2213-2220
,共8页
胡正雪%尹颖%艾弗逊%郭红岩
鬍正雪%尹穎%艾弗遜%郭紅巖
호정설%윤영%애불손%곽홍암
CO2%O3%复合效应%水生生态系统
CO2%O3%複閤效應%水生生態繫統
CO2%O3%복합효응%수생생태계통
elevated CO2%elevated O3%combined effects%aquatic ecosystem
在开顶式气室OTC(Open top chamber)平台下,构建微宇宙水环境模拟系统,初步研究了当大气CO2浓度升高200μL·L-1、O3浓度升高50 nL·L-1及其复合作用下,水体理化参数(pH、Eh、可溶态Zn、Mg、Fe以及可溶态总氮、总磷)、沉积物理化性质(pH、Eh、Zn、Mg和Fe的形态)的变化。经5个月的持续观察发现,与正常大气条件相比,CO2升高(600依10)μL·L-1,水体pH下降,可溶态Zn、Mg浓度升高,可溶态总磷浓度无明显变化;O3升高(125依20)nL·L-1,水体pH无明显变化,可溶态Zn、Mg、总磷浓度无明显变化;CO2和O3复合升高[(600依10)μL·L-1 CO2,(125依20)nL·L-1 O3],水体pH下降,可溶态Zn浓度无明显变化,可溶态Mg、总磷浓度升高。结果表明:CO2单独升高可降低水体pH,促进沉积物对金属元素的释放;O3单独升高对水体pH、沉积物释放元素无明显影响;而CO2+O3复合升高可降低水体pH,促进沉积物对Mg和磷的释放。
在開頂式氣室OTC(Open top chamber)平檯下,構建微宇宙水環境模擬繫統,初步研究瞭噹大氣CO2濃度升高200μL·L-1、O3濃度升高50 nL·L-1及其複閤作用下,水體理化參數(pH、Eh、可溶態Zn、Mg、Fe以及可溶態總氮、總燐)、沉積物理化性質(pH、Eh、Zn、Mg和Fe的形態)的變化。經5箇月的持續觀察髮現,與正常大氣條件相比,CO2升高(600依10)μL·L-1,水體pH下降,可溶態Zn、Mg濃度升高,可溶態總燐濃度無明顯變化;O3升高(125依20)nL·L-1,水體pH無明顯變化,可溶態Zn、Mg、總燐濃度無明顯變化;CO2和O3複閤升高[(600依10)μL·L-1 CO2,(125依20)nL·L-1 O3],水體pH下降,可溶態Zn濃度無明顯變化,可溶態Mg、總燐濃度升高。結果錶明:CO2單獨升高可降低水體pH,促進沉積物對金屬元素的釋放;O3單獨升高對水體pH、沉積物釋放元素無明顯影響;而CO2+O3複閤升高可降低水體pH,促進沉積物對Mg和燐的釋放。
재개정식기실OTC(Open top chamber)평태하,구건미우주수배경모의계통,초보연구료당대기CO2농도승고200μL·L-1、O3농도승고50 nL·L-1급기복합작용하,수체이화삼수(pH、Eh、가용태Zn、Mg、Fe이급가용태총담、총린)、침적물이화성질(pH、Eh、Zn、Mg화Fe적형태)적변화。경5개월적지속관찰발현,여정상대기조건상비,CO2승고(600의10)μL·L-1,수체pH하강,가용태Zn、Mg농도승고,가용태총린농도무명현변화;O3승고(125의20)nL·L-1,수체pH무명현변화,가용태Zn、Mg、총린농도무명현변화;CO2화O3복합승고[(600의10)μL·L-1 CO2,(125의20)nL·L-1 O3],수체pH하강,가용태Zn농도무명현변화,가용태Mg、총린농도승고。결과표명:CO2단독승고가강저수체pH,촉진침적물대금속원소적석방;O3단독승고대수체pH、침적물석방원소무명현영향;이CO2+O3복합승고가강저수체pH,촉진침적물대Mg화린적석방。
In this study we investigated the responses of chemical properties in aquatic ecosystem to treatments with elevated CO2 and O3 in open top chamber(OTC)for 5 months. The physiochemical parameters of surface water(pH, Eh, soluble Zn, Mg, Fe, TN and TP)and sedi-ments(pH, Eh,and percentages of Zn, Mg and Fe fractions)were measured. Elevated CO2[(600±10)μL·L-1] decreased pH, but increased soluble Zn and Mg concentrations in the surface water. Increasing CO2 had no influence on soluble TP in the surface water. Elevated O3 [(125±20)nL·L-1] did not influence pH or concentrations of soluble Zn, Mg and TP in the surface water.Elevation of both CO2 and O3[600±10)μL·L-1 CO2,(125±20)nL·L-1 O3] decreased water pH, whereas increased soluble Mg and TP concentrations significantly. Soluble Zn was not influenced by elevated CO2 and O3 combination. These results indicate that elevated CO2 decreases surface water pH but increases metal concentrations, while elevated O3 has no significant influence on pH or element contents in water. Combination of elevated CO2 and O3 re-duces pH and enhances Mg and phosphorus in surface water. Further studies are necessary to investigate the mechanisms under which fu-ture atmospheric conditions influence aquatic ecosystem especially under combined CO2 and O3.