臭氧污染与陆地生态系统生产力

被引:10
作者
任巍 [1 ]
田汉勤 [2 ]
机构
[1] 中国科学院地理科学与资源研究所
[2] 美国奥本大学林业与野生生物学院
基金
美国能源部;
关键词
空气污染; 臭氧; 陆地生态系统生产力; 生态系统模式;
D O I
暂无
中图分类号
X51 [大气污染及其防治];
学科分类号
0706 ; 070602 ;
摘要
空气污染的严重性、普遍性和不断发展的趋势及其对陆地生态系统生产力造成的重大影响已引起科学工作者的高度重视,成为一个急需解决的重要课题。对流层臭氧(O3)在空气污染现状与未来发展趋势中占据重要角色,该文重点探讨了O3对陆地生态系统生产力的光合、分配、生长和产量形成等主要过程的影响及其对整个生态系统的长期效应,并评述了相关研究方法进展。主要结论包括:O3在生产力形成过程中的每个环节中都有着不同程度的负面影响,通过影响光合作用和气孔导度,减少根冠比改变碳分配量,而最终导致粮食生产和森林生物量损失率高达30%;气候变化、CO2和O3协同作用对植物影响较为复杂,有促进也有抑制;生态系统模拟已成为研究O3污染影响陆地生态系统生产力的主要方法之一,在区域评估和未来气候预测方面都具有重要作用。
引用
收藏
页码:219 / 230
页数:12
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