中文摘要：

采用平面光电极技术研究了霍甫水丝蚓（Limnodrilus hoffmeisteri）扰动对湖泊沉积物-水界面二维pH值分布特征的影响.结果表明水丝蚓扰动能将沉积物-水界面处pH值的变化梯度由2.5 mm内降低1.6个pH值单位减缓至约1 cm内降低0.6个pH值单位,并在界面处形成约1 cm深的pH值缓冲区域.水丝蚓的造穴活动也会对沉积物的二维pH值分布产生影响,洞穴内的pH值高于洞穴周边沉积物约0.6个pH值单位.

英文摘要：

The presented study measured the 2 dimensional pH value at sediment-water interface under the bioturbation of Limnodrilus hoffmeisteri using the planar optode technique. The result showed pH gradient was alleviated,which decreased from 1. 6 pH /2. 5 mm to 0. 6 pH /1 cm. A 1 cm-depth buffer zone for the pH was formed in the vicinity of the sediment-water interface（ SWI）.The process of digging burrows by Limnodrilus hoffmeisteri had significant effects on the distribution of the pH around the SWI,and the pH in the burrow was 0. 6 pH higher than that of the outside.