新建和修复的河滨湿地甲烷排放及其影响因子研究进展

Advances in research of methane emissions and impact factors in created and restored riparian wetlands

在全球尺度上对新建和修复的河滨湿地的甲烷排放情况及其影响因子的研究进行了综述。认为相较于自然河滨湿地,新建和修复的河滨湿地可能会减少甲烷排放,且甲烷排放具有显著的时空变化规律;新建和修复的河滨湿地甲烷排放主要受到两个可控因素——植被类型和水文条件的影响;适当调节水位,建立周期性的水位波动,降低淹水持续时间,增加植物多样性,选择适宜的植被种类及其配置模式,都有助于控制甲烷排放量。建议在新建和修复的河滨湿地设计与管理中,通过植被配置和水文调控有效减少其甲烷排放。

This paper presents an overview of methane emissions and impact factors in created and restored riparian wetlands at a global scale .Emissions of methane in created and restored riparian wetlands are less than those in natural riparian wetlands and show significant temporal and spatial variations .Vegetation types and hydrological conditions are the most controllable factors affecting the emissions of methane in created and restored riparian wetlands.Methane emissions can be effectively controlled by properly regulating the water level , creating periodic water level fluctuation , reducing inundation duration , increasing vegetation diversity , and selecting suitable vegetation types and allocation patterns .It is suggested that vegetation allocation and hydrological regulation be conducted in the design and management of created and restored riparian wetlands , in order to reduce methane emissions .