title: [Microbial diversity of sediments from the coasts of Dalian Changshan Islands].
abstract: OBJECTIVE
  To understand the impacts of anthropogenic activities on structure and composition of bacterial communities and to evaluate how bacterial communities respond to environmental gradients at coastal sediments.
  
  
  METHODS
  The diversity of bacterial communities in sediments from tourist and mariculture zones at coastal area of Dalian Changshan Islands was assessed using terminal restriction fragment length polymorphism (t-RFLP) and denaturing gradient gel electrophoresis (DGGE) approaches. Meanwhile, 16S rRNA clone library was constructed to reveal the composition and structure of bacterial communities in the most seriously polluted site (D4).
  
  
  RESULTS
  There were much higher values of richness, Shannon-wiener and evenness index at D4 site by the analysis of terminal restriction fragments (t-RFs). The clustering result on the t-RFs areas and DGGE patterns showed that the bacterial diversity of tourist zone were more similar, while the distinction was increased with pollution levels among the tourist and mariculture zones. The 16S rRNA clone of D4 revealed that the Proteobacteria were the dominant phylum, and gamma-proteobacteria was the main class within Proteobacteria.
  
  
  CONCLUSIONS
  The study documented changes in bacterial community structure by human impacts of mariculture than geographical location.
authors.affiliation: Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. jlli@yic.ac.cn
authors.forename: Jialin
authors.initials: J
authors.lastname: Li
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Wang
authors.forename: Song
authors.initials: S
authors.lastname: Qin
authors.forename: Guangyi
authors.initials: G
authors.lastname: Wang
mesh_terms: D001419:Bacteria / Q000145:classification* / Q000235:genetics; D044822:Biodiversity; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D058645:Denaturing Gradient Gel Electrophoresis; D017753:Ecosystem; D019015:Geologic Sediments / Q000382:microbiology*; D010802:Phylogeny; D012150:Polymorphism, Restriction Fragment Length; D020560:Proteobacteria / Q000145:classification / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S