A sediment sample was collected from a deep-sea hydrothermal vent field located at a depth of 2 951 m on the Southwest Indian Ridge. Phylogenetic analyses were performed on the prokaryotic community using polymerase c...A sediment sample was collected from a deep-sea hydrothermal vent field located at a depth of 2 951 m on the Southwest Indian Ridge. Phylogenetic analyses were performed on the prokaryotic community using polymerase chain reaction（PCR） amplification of the 16 S rRNA and nifH genes. Within the Archaea, the dominant clones were from marine benthic group E（MBGE） and marine group I（MGI） belonging to the phyla Euryarchaeota and Thaumarchaeota, respectively. More than half of the bacterial clones belonged to the Proteobacteria, and most fell within the Gammaproteobacteria. No epsilonproteobacterial sequence was observed. Additional phyla were detected including the Actinobacteria, Bacteroidetes, Planctomycetes, Acidobacteria, Nitrospirae, Chloroflexi, Chlorobi, Chlamydiae, Verrucomicrobia, and candidate divisions OD1, OP11, WS3 and TM6, confirming their existence in hydrothermal vent environments. The detection of nifH gene suggests that biological nitrogen fixation may occur in the hydrothermal vent field of the Southwest Indian Ridge. Phylogenetic analysis indicated that only Clusters I and III NifH were present. This is consistent with the phylogenetic analysis of the microbial 16 S rRNA genes, indicating that Bacteria play the main role in nitrogen fixation in this hydrothermal vent environment.展开更多
The 12 th International Conference on Salt Lake Research was held in Langfang City,China from July 14 to 18,2014.Fifteen manuscripts of presentations have been retained for publication in this special issue.They are v...The 12 th International Conference on Salt Lake Research was held in Langfang City,China from July 14 to 18,2014.Fifteen manuscripts of presentations have been retained for publication in this special issue.They are very diverse,covering the biology,physics,chemistry and geology of salt lakes,the history of hydrological research on the Dead Sea,the effects of socioeconomic and environmental policies by stakeholders on human populations,and the increasing salinization of freshwater lakes around the world.展开更多
September 5,2015 Prof.Bair Namsaraev,the leader in aquatic microbiology of Siberian lakes,passed away after battle with cancer.He was 72 years old.Bair was born in 1943 in the small village in Southern Siberia in the ...September 5,2015 Prof.Bair Namsaraev,the leader in aquatic microbiology of Siberian lakes,passed away after battle with cancer.He was 72 years old.Bair was born in 1943 in the small village in Southern Siberia in the family of a school teacher.He had 6 brothers and sisters.After school he worked on the collective farm and served in the Soviet Army.In 1965 he entered Moscow State University.After graduating in 1970 Bair started his Ph D work on the hydrogen oxidizing bacteria at the Institute of Microbiology in Moscow.Since 1973 he worked at the Institute of Physiology and Biochemistry of Microorganisms展开更多
The first modem survey of the Dead Sea was performed by the Geological Survey of Israel in 1959-1960, and the report published remains the baseline study for our understanding of the physical and chemical properties o...The first modem survey of the Dead Sea was performed by the Geological Survey of Israel in 1959-1960, and the report published remains the baseline study for our understanding of the physical and chemical properties of the lake. At the time the Dead Sea was a meromictic lake with a strong salinity gradient separating the deep waters （〉40 m depth） from the less saline surface waters. A few results of analyses of deeper water samples collected in the 1930s were reported, but overall we have very little information about the structure of the lake＇s water column before the 1959-1960 survey. However, it is little known that data on the physical and the chemical structure of the Dead Sea water column were obtained already in the middle of the 19~ century, and the information collected then is highly relevant for the reconstruction of the limnological properties of the lake in earlier times. The expedition of Lieutenant William Lynch （U.S. Navy） in 1848 reported the presence of a temperature minimum at a depth of-18 m, and also retrieved a water sample collected close to the bottom for chemical analysis. In 1864, the French Dead Sea exploration by the Duc de Luynes and his crew yielded detailed density and salinity profiles for a number of sampling stations. The results of these pioneering studies are discussed here, as well as the sampling equipment and measuring instruments used by the 1848 and the 1864 expeditions.展开更多
The statement that the world’s ecosystems are rapidly deteriorating due to human intervention and global warming is nowadays commonplace.Some of the ecosystems most heavily impacted are inland salt lakes.The salt lak...The statement that the world’s ecosystems are rapidly deteriorating due to human intervention and global warming is nowadays commonplace.Some of the ecosystems most heavily impacted are inland salt lakes.The salt lakes are among the most valuable and fascinating ecosystems on Earth,and their study has both basic scientifi c interest as well as applied aspects.展开更多
Today there is a single ship on the Dead Sea:a vessel that makes monthly research cruises.But in earlier periods many kinds of boats sailed the waves of the saltiest of all lakes.Stone and wooden anchors found on the ...Today there is a single ship on the Dead Sea:a vessel that makes monthly research cruises.But in earlier periods many kinds of boats sailed the waves of the saltiest of all lakes.Stone and wooden anchors found on the newly展开更多
At the annual meeting of the editorial board of the International Journal of Systematic and Evolutionary Microbiology(IJSEM),held in Hangzhou,Zhejiang,on August 30,2015,the editors were presented with some statistics ...At the annual meeting of the editorial board of the International Journal of Systematic and Evolutionary Microbiology(IJSEM),held in Hangzhou,Zhejiang,on August 30,2015,the editors were presented with some statistics about submissions of papers to the journal from different countries.China is number 1:in 2014,31.2%of all submissions came from China,leaving South Korea with 14.8%far behind.For China there has been展开更多
基金The China Ocean Mineral Resources R&D Association(COMRA)Special Foundation under contract No.DY125-15-R-03the National Natural Science Foundation of China under contract Nos 41276173 and 41206104the Scientific Research Fund of the Second Institute of Oceanography,State Oceanic Administration under contract No.JT1011
文摘A sediment sample was collected from a deep-sea hydrothermal vent field located at a depth of 2 951 m on the Southwest Indian Ridge. Phylogenetic analyses were performed on the prokaryotic community using polymerase chain reaction（PCR） amplification of the 16 S rRNA and nifH genes. Within the Archaea, the dominant clones were from marine benthic group E（MBGE） and marine group I（MGI） belonging to the phyla Euryarchaeota and Thaumarchaeota, respectively. More than half of the bacterial clones belonged to the Proteobacteria, and most fell within the Gammaproteobacteria. No epsilonproteobacterial sequence was observed. Additional phyla were detected including the Actinobacteria, Bacteroidetes, Planctomycetes, Acidobacteria, Nitrospirae, Chloroflexi, Chlorobi, Chlamydiae, Verrucomicrobia, and candidate divisions OD1, OP11, WS3 and TM6, confirming their existence in hydrothermal vent environments. The detection of nifH gene suggests that biological nitrogen fixation may occur in the hydrothermal vent field of the Southwest Indian Ridge. Phylogenetic analysis indicated that only Clusters I and III NifH were present. This is consistent with the phylogenetic analysis of the microbial 16 S rRNA genes, indicating that Bacteria play the main role in nitrogen fixation in this hydrothermal vent environment.
文摘The 12 th International Conference on Salt Lake Research was held in Langfang City,China from July 14 to 18,2014.Fifteen manuscripts of presentations have been retained for publication in this special issue.They are very diverse,covering the biology,physics,chemistry and geology of salt lakes,the history of hydrological research on the Dead Sea,the effects of socioeconomic and environmental policies by stakeholders on human populations,and the increasing salinization of freshwater lakes around the world.
文摘September 5,2015 Prof.Bair Namsaraev,the leader in aquatic microbiology of Siberian lakes,passed away after battle with cancer.He was 72 years old.Bair was born in 1943 in the small village in Southern Siberia in the family of a school teacher.He had 6 brothers and sisters.After school he worked on the collective farm and served in the Soviet Army.In 1965 he entered Moscow State University.After graduating in 1970 Bair started his Ph D work on the hydrogen oxidizing bacteria at the Institute of Microbiology in Moscow.Since 1973 he worked at the Institute of Physiology and Biochemistry of Microorganisms
文摘The first modem survey of the Dead Sea was performed by the Geological Survey of Israel in 1959-1960, and the report published remains the baseline study for our understanding of the physical and chemical properties of the lake. At the time the Dead Sea was a meromictic lake with a strong salinity gradient separating the deep waters （〉40 m depth） from the less saline surface waters. A few results of analyses of deeper water samples collected in the 1930s were reported, but overall we have very little information about the structure of the lake＇s water column before the 1959-1960 survey. However, it is little known that data on the physical and the chemical structure of the Dead Sea water column were obtained already in the middle of the 19~ century, and the information collected then is highly relevant for the reconstruction of the limnological properties of the lake in earlier times. The expedition of Lieutenant William Lynch （U.S. Navy） in 1848 reported the presence of a temperature minimum at a depth of-18 m, and also retrieved a water sample collected close to the bottom for chemical analysis. In 1864, the French Dead Sea exploration by the Duc de Luynes and his crew yielded detailed density and salinity profiles for a number of sampling stations. The results of these pioneering studies are discussed here, as well as the sampling equipment and measuring instruments used by the 1848 and the 1864 expeditions.
文摘The statement that the world’s ecosystems are rapidly deteriorating due to human intervention and global warming is nowadays commonplace.Some of the ecosystems most heavily impacted are inland salt lakes.The salt lakes are among the most valuable and fascinating ecosystems on Earth,and their study has both basic scientifi c interest as well as applied aspects.
文摘Today there is a single ship on the Dead Sea:a vessel that makes monthly research cruises.But in earlier periods many kinds of boats sailed the waves of the saltiest of all lakes.Stone and wooden anchors found on the newly
基金National Basic Research Program of China(No.2014CB441503)National Natural Science Foundation of China(No.41406174)Natural Science Foundation of Zhejiang Province(No.LY14D060006)~~
文摘At the annual meeting of the editorial board of the International Journal of Systematic and Evolutionary Microbiology(IJSEM),held in Hangzhou,Zhejiang,on August 30,2015,the editors were presented with some statistics about submissions of papers to the journal from different countries.China is number 1:in 2014,31.2%of all submissions came from China,leaving South Korea with 14.8%far behind.For China there has been
