首页 | 本学科首页   官方微博 | 高级检索  
     检索      


The detection of Rhizosolenia (Bacillariophyceae) in sediment of Ontario lakes and implications for paleoecology
Authors:Y -K Yung  K H Nicholls  A G Cheng
Institution:(1) Department of Botany, University of Toronto, M5S 1A1 Toronto, Ontario, Canada;(2) Institute for Environmental Studies, University of Toronto, M5S 1A1 Toronto, Ontario, Canada;(3) Aquatic Biology Section, Water Resources Branch, Ontario Ministry of the Environment, P.O. Box 213, M9W 5L1 Rexdale, Ontario, Canada
Abstract:The detection of the freshwater genus Rhizosolenia (Bacillariophyceae) remains in sediments is affected by the oxidants used in the digestion procedures. The Rhizosolenia counts decrease from 30% H2O2>50% HNO3>50% chromic acid>100% HNO3>100% H2SO4. Rhizosolenia is mostly found in Ontario lakes with summer average pH ranging from 5.6 to 8.3, Gran alkalinity from 0.2 to 120 mg L–1 as CaCO3 and water colour from 4 to 105 Hazen units. Large Rhizosolenia populations are generally found in clear lakes, neutral pH and low alkalinity.
Keywords:Rhizosolenia  paleoecology  diatoms  acidification
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号