吉林大学学报（理学版）Issue(6)：1334-1340,7.DOI:10.13413/j.cnki.jdxblxb.2015.06.50
颤蚓及其生物扰动对表层沉积物微环境 pH 和溶解氧的影响
Effects of Tubificids and Their Bioturbation on pH and Dissolved Oxygen in the Microenvironment of Surface Sediment
摘要
Abstract
Tubificid was selected as the bioturbator.High-resolution distribution and variation of pH and dissolved oxygen (DO)in the microenvironment of sediment near the tubificids’burrows were investigated by laboratory simulation experiments via microelectrodes.The results indicate that the pH value of sediment increased with time going at first,and then decreased.The bioturbation of tubificids had an inhibitory effect on this decrease of pH value.At the same bioturbation time,the surface pH value of the sediment around the tubificid burrows declined (up to 0.3 pH units).This effect of declining could become effective in an area of 1 mm radius around the burrows.Without tubificids,DO value level of the microenvironment near water-sediment interface decreased with time going.In the presence of tubificids,the DO value level near the water-sediment interface around the tubificid burrows increased (increased by 9.2—17.0 μmol/L ) in the horizontal direction. The penetration depth of DO also increased,and the maximum penetration depth increased from 3 mm to 5 mm.Therefore,the presence of tubificids would affect the contaminants in the water-sediment interface by changing the distribution and variation pattern of pH and DO of the sediment microenvironment.关键词
生物扰动/沉积物/颤蚓/pH 值/溶解氧/微电极Key words
bioturbation/sediment/tubificid/pH value/dissolved oxygen/microelectrode分类
资源环境引用本文复制引用
李耀睿,花修艺,毛丹,政芳,董德明,梁大鹏..颤蚓及其生物扰动对表层沉积物微环境 pH 和溶解氧的影响[J].吉林大学学报（理学版）,2015,(6):1334-1340,7.基金项目
国家自然科学基金(批准号:20607007 （）
21277056)和中央高校基本科研业务费专项基金(批准号:201103113) （批准号:201103113）
