作　　者： ; ; ; ; (叶佳舒）;

机构地区： 沈阳农业大学

出　　处： 《生态环境学报》 2016年第9期1584-1590,共7页

摘　　要： 地下生态学过程是指陆地生态系统地下部分结构与功能的动态变化过程,它与地上过程高度关联,是全面理解生态系统结构和功能的关键。随着人类活动的不断增强和工业的不断发展,地表臭氧的浓度迅速增长。目前,有关臭氧浓度升高对陆地生态系统的影响研究主要集中在地上部分,而有关其对地下生态学过程影响的研究有限,臭氧浓度升高对地下生态学过程的影响作用复杂。综述臭氧浓度升高对森林及农田地下过程影响的研究进展,以期为我国学者进一步了解臭氧对森林树木及农田生态影响提供科学依据。有关大气臭氧浓度升高对森林和农田地下生态过程的影响,已有研究主要包括植物根系生长、根系代谢、菌根、土壤养分、土壤微生物活性的响应变化等几个方面。臭氧对地下生态过程的影响与臭氧浓度、物种、种植条件以及臭氧污染环境模拟方法相关。今后应该加强臭氧浓度升高条件下土壤微生物过程与土壤养分循环过程之间的相关机理研究以及臭氧与其他环境因子的交互作用对地下生态过程的影响趋势和机理的研究。 Belowground ecological processes, defined as the dynamics of structure and function of belowground terrestrial ecosystemand highly related with aboveground parts, play a critical role in shaping the structure and function of terrestrial ecosystems. Humanactivities and industrialization have driven substantial increases in ozone emission, which made substaintial effects on terrestrialecosystems. Though many investigations focused on the effects of elevated ozone on ecosystems, a little attention was paid on thebelowground ecological processes, which also showed inconsistent results. Understanding the effects of elevated ozone on thebelowground ecological processes (root growth, root metabolism, mycorrhiza growth, soil nutrient, soil microbial activity), willadvance belowground ecology under the background of elevated ozone, which were reviewed in this paper. Results suggest that theeffects of elevated ozone on belowground processes are relevant to the concentration of ozone, species, community composition andthe method of ozone pollution simulation. Currently, there is little information about the mechanism of the effects of elevated ozoneon belowground processes. Futher investigations should strengthen the linkage between soil microbial activity and soil nutrientcycling under the elevated ozone concentration. In addition, the responses of belowground processes to combined effects of elevatedozone and other environmental stresses should also be imphasized.

关 键 词： 臭氧 细根 菌根 土壤碳氮循环 微生物群落结构与功能

领　　域： [生物学]