环境工程学报2011，Vol.5Issue(5)：1071-1076,6.
水丝蚓生物扰动对沉积物磷释放的影响
Influence of Limnodrilus hoffmeisteri bioturbation on phosphorus release from sediment
摘要
Abstract
Influence of Limnodrilus hoffmeisteri bioturbation on phosphorus release from sediment in different Limnodrilus hoffmeisteri densities and different environments was studied in this paper. The results showed that bioturbation of Limnodrilus hoffmeisteri improved the phosphorus release from sediment obviously. Compared with control test before adding Limnodrilus hoffmeisteri, when the Limnodrilus hoffmeisteri density was 1 ind./cm2 and 2 ind./cm2, the average concentration of total phosphorus in overlying water was improved by 190％ and 230％, respectively. The increase of temperature would increase the effects of Limnodrilus hoffmeisteri bioturbation on phosphorus release. Compared with 5 ℃ the total phosphorus release increment increased by 90％ and 225％ , respectively when temperature was 15 ℃ and 25 ℃. In acidic and alkali environment, the bioturbation of Limnodrilus hoffmeisteri would be enhanced, which would has a positive effect on phosphorus release. When the pH was 5 and 9, the total phosphorus release increment increased 22％ and 41％, respectively compared with pH 7. Limnodrilus hoffmeisteri had strong adaptability and survivability to anaerobic environment. In anaerobic environment, the bioturbation of Limnodrilus hoffmeisteri was improved and the total phosphorus release increment was twice than that in aerobic environment.关键词
霍甫水丝蚓/沉积物/磷释放/生物扰动Key words
Limnodrilus hoffmeisteri/ sediment/ phosphorus release/ bioturbation分类
资源环境引用本文复制引用
吴方同,闫艳红,孙士权,谭万春..水丝蚓生物扰动对沉积物磷释放的影响[J].环境工程学报,2011,5(5):1071-1076,6.基金项目
湖南省科学技术厅科技计划项目(2010SK3022) （2010SK3022）
水沙科学与水灾害防治湖南省重点实验室开放基金项目(2010SS04,2010SS05) （2010SS04,2010SS05）
