Responses of Phenol Ozidase Activity to Water Level Changes in Peatlands: Implications for Global Carbon Cycling
Phenol oxidase is expected to play a “latch role in the responses of carbon cycling in peatlands to global climate change. The effects of water level changes on phenol oxidase activity and phenolic substances were examined in two typical peatlands, bog and swamp, located in Hsiao Hsinganling, Heilongjiang province, north China. The results indicted the ratio of measured phenol oxidase activity to phenolics concentration is an effective index mark illustrating the impacts of water level changes on phenol oxidase involved carbon cycling processes. The responses of phenol oxidase activities to water level changes are subject to not only oxygen restrictions but also acidification/drought stress. For swamp, biogeochemical processes at upmost surface (0-10 cm) act as a pivotal role in responses of carbon cycling to water level changes. Nevertheless, biogeochemical responses in deeper bog peat (10-18 cm) to water level depression can not be neglected in assessing the impacts of moisture condition changes on enzyme-involved soil organic matter decomposition.
phenol ozsidase water level peatland phenolics carbon cycling
XIANG Wu HE Ling SUN Xingting HU Xiaofang ZHANG Ran
Key Laboratory of Biogeology and Environmental Geology of Education Ministry,China University of Geosciences,Wuhan 430074,Hubei,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
84-88
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）