title: [Distribution of diatoms in central city of Beijing].
abstract: OBJECTIVE
  To explore the quantity and distribution of diatoms in main rivers and lakes in Xicheng, Dongcheng, Chaoyang, Haidian, Fengtai and Shijingshan Districts of the city of Beijing.
  
  
  METHODS
  Water samples were examined through the method of disorganizing, which were collected from 16 rivers and lakes in the central city of Beijing in September and October 2011. Diatom species and proportions of water samples were analyzed using DotSlide microscope station.
  
  
  RESULTS
  A total of 10 species of diatoms were detected. Cyclotella, Synedra and Melosira etc. were found to be the dominant species via quantitative analysis. Significant differences were observed for diatom species and proportions among the different rivers and lakes. Melosira was found to be the dominant species in the Chang River; Synedra, in the Zhuan River, the Kunyu River and the Taoranting Park; Cyclotella, in the East Moat River, the Ba River, the Liangshui River and the Yongding River; and Navicula, in the Liangma River; Nitzschia, in the diversion canal of the Yongding River.
  
  
  CONCLUSIONS
  The features of distribution of diatoms in the central city of Beijing are outlined. The morphological and relative constituent ratio database of diatoms are established in central city of Beijing.
authors.affiliation: Department of Forensic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Li
authors.forename: Ting-Yi
authors.initials: TY
authors.lastname: Sun
authors.forename: Hong-Xia
authors.initials: HX
authors.lastname: Liu
authors.forename: Hai-Dong
authors.initials: HD
authors.lastname: Zhang
authors.forename: Ying-Jie
authors.initials: YJ
authors.lastname: Bai
authors.forename: Rong-Shuai
authors.initials: RS
authors.lastname: Wang
authors.forename: Liang
authors.initials: L
authors.lastname: Liu
mesh_terms: D044822:Biodiversity; D002681:China; D002947:Cities; D017377:Diatoms / Q000145:classification / Q000302:isolation & purification; D017753:Ecosystem; D005554:Forensic Medicine / Q000379:methods; D005618:Fresh Water / Q000032:analysis*; D010839:Phytoplankton / Q000145:classification / Q000302:isolation & purification; D045483:Rivers; D013045:Species Specificity