PMID- 16885301 OWN - NLM STAT- MEDLINE DCOM- 20061005 LR - 20181113 IS - 0099-2240 (Print) IS - 1098-5336 (Electronic) IS - 0099-2240 (Linking) VI - 72 IP - 8 DP - 2006 Aug TI - Bacterioplankton community composition along a salinity gradient of sixteen high-mountain lakes located on the Tibetan Plateau, China. PG - 5478-85 AB - The influence of altitude and salinity on bacterioplankton community composition (BCC) in 16 high-mountain lakes located at altitudes of 2,817 to 5,134 m on the Eastern Qinghai-Xizang (Tibetan) Plateau, China, spanning a salinity gradient from 0.02% (freshwater) to 22.3% (hypersaline), was investigated. Three different methods, fluorescent in situ hybridization, denaturing gradient gel electrophoresis (DGGE) with subsequent band sequencing, and reverse line blot hybridization (RLB) with probes targeting 17 freshwater bacterial groups, were used for analysis of BCC. Furthermore, the salt tolerances of 47 strains affiliated with groups detected in or isolated from the Tibetan habitats were investigated. Altitude was not found to influence BCC significantly within the investigated range. Several groups of typical freshwater bacteria, e.g., the ACK-M1 cluster and the Polynucleobacter group, were detected in habitats located above 4,400 m. Salinity was found to be the dominating environmental factor controlling BCC in the investigated lakes, resulting in only small overlaps in the BCCs of freshwater and hypersaline lakes. The relative abundances of different classes of Proteobacteria showed a sharp succession along the salinity gradient. Both DGGE and RLB demonstrated that a few freshwater bacterial groups, e.g., GKS98 and LD2, appeared over wide salinity ranges. Six freshwater isolates affiliated with the GKS98 cluster grew in ecophysiological experiments at maximum salinities of 0.3% to 0.7% (oligosaline), while this group was detected in habitats with salinities up to 6.7% (hypersaline). This observation indicated ecologically significant differences in ecophysiological adaptations among members of this narrow phylogenetic group and suggested ecological significance of microdiversity. FAU - Wu, Qinglong L AU - Wu QL AD - Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, East Beijing Road 73, Nanjing 210008, People's Republic of China. FAU - Zwart, Gabriel AU - Zwart G FAU - Schauer, Michael AU - Schauer M FAU - Kamst-van Agterveld, Miranda P AU - Kamst-van Agterveld MP FAU - Hahn, Martin W AU - Hahn MW LA - eng SI - GENBANK/AM182266 SI - GENBANK/AM182267 SI - GENBANK/AM182268 SI - GENBANK/AM182269 SI - GENBANK/AM182270 SI - GENBANK/AM182271 SI - GENBANK/AM182272 SI - GENBANK/AM182273 SI - GENBANK/AM182274 SI - GENBANK/AM182275 SI - GENBANK/AM182276 SI - GENBANK/AM182277 SI - GENBANK/AM182278 SI - GENBANK/AM182279 SI - GENBANK/AM182280 SI - GENBANK/AM182281 SI - GENBANK/AM182282 SI - GENBANK/AM182283 SI - GENBANK/AM182284 SI - GENBANK/AM182285 SI - GENBANK/AM182286 SI - GENBANK/AM182287 SI - GENBANK/AM182288 SI - GENBANK/AM182289 SI - GENBANK/AM182290 SI - GENBANK/AM182291 SI - GENBANK/AM182292 SI - GENBANK/AM182293 SI - GENBANK/AM182294 SI - GENBANK/AM182295 SI - GENBANK/AM182296 SI - GENBANK/AM182297 SI - GENBANK/AM182298 SI - GENBANK/AM182299 SI - GENBANK/AM182300 SI - GENBANK/AM182301 SI - GENBANK/AM182302 SI - GENBANK/AM182303 SI - GENBANK/AM182304 SI - GENBANK/AM182305 SI - GENBANK/AM182306 SI - GENBANK/AM182307 SI - GENBANK/AM182308 SI - GENBANK/AM182309 SI - GENBANK/AM182310 SI - GENBANK/AM182311 SI - GENBANK/AM182312 SI - GENBANK/AM182313 SI - GENBANK/AM182314 SI - GENBANK/AM182315 SI - GENBANK/AM182316 SI - GENBANK/AM182317 SI - GENBANK/AM182318 SI - GENBANK/AM182319 SI - GENBANK/AM182320 SI - GENBANK/AM182321 SI - GENBANK/AM182322 SI - GENBANK/AM182323 SI - GENBANK/AM182324 SI - GENBANK/AM182325 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Appl Environ Microbiol JT - Applied and environmental microbiology JID - 7605801 RN - 0 (DNA, Bacterial) RN - 0 (DNA, Ribosomal) RN - 0 (RNA, Ribosomal, 16S) RN - 451W47IQ8X (Sodium Chloride) SB - IM MH - *Altitude MH - Animals MH - China MH - Colony Count, Microbial MH - DNA, Bacterial/analysis MH - DNA, Ribosomal/analysis MH - Ecosystem MH - Fresh Water/chemistry/*microbiology MH - Genes, rRNA MH - In Situ Hybridization, Fluorescence MH - Molecular Sequence Data MH - Plankton/classification/drug effects/genetics/*growth & development MH - Proteobacteria/classification/drug effects/genetics/*growth & development MH - RNA, Ribosomal, 16S MH - Sequence Analysis, DNA MH - Sodium Chloride/*pharmacology PMC - PMC1538701 EDAT- 2006/08/04 09:00 MHDA- 2006/10/06 09:00 PMCR- 2006/12/01 CRDT- 2006/08/04 09:00 PHST- 2006/08/04 09:00 [pubmed] PHST- 2006/10/06 09:00 [medline] PHST- 2006/08/04 09:00 [entrez] PHST- 2006/12/01 00:00 [pmc-release] AID - 72/8/5478 [pii] AID - 0767-06 [pii] AID - 10.1128/AEM.00767-06 [doi] PST - ppublish SO - Appl Environ Microbiol. 2006 Aug;72(8):5478-85. doi: 10.1128/AEM.00767-06.