Post-Viking Microbiology: New Approaches, New Data, New Insights

  title={Post-Viking Microbiology: New Approaches, New Data, New Insights},
  author={Kenneth H. Nealson},
  journal={Origins of life and evolution of the biosphere},
  • K. Nealson
  • Published 2004
  • Environmental Science
  • Origins of life and evolution of the biosphere
In the 20 years since the Viking experiments, major advances have been made in the areas of microbial systematics, microbial metabolism, microbial survival capacity, and the definition of environments on earth, suggesting that life is more versatile and tenacious than was previously appreciated. Almost all niches on earth which have available energy, and which are compatible with the chemistry of carbon-carbon bonds, are known to be inhabited by bacteria. The oldest known bacteria on earth… 
Archaea: Ecology, Application, and Conservation
Archaea are the inhabitants of extreme environments on the earth. They commonly live at extreme acidity, temperature, and alkalinity or in hypersaline water, hot springs, hydrothermal vents, and
Can Martian Life Exist Under Dry Conditions
Recently, we have begun to hear more and more about news comingfromMars. With the recent confirmation of evidence ofliquidwater in Mars' past, evidence indicating liquid water in Mars' present, and
Microbial Resource Conservation
Majority of the biomass and biodiversity of life on the earth are accounted by microbes, and so far about 10% of the earth’s microbial diversity has been characterized. They play a significant role
Microbial Life and Temperature: A Semi Empirical Approach
  • León Garzón
  • Physics
    Origins of life and evolution of the biosphere
  • 2004
It is shown that an equation (the GLE equation) deduced from the Theory of Rate Processes is more accurate than the Arrhenius equation and that organisms survive longer at low temperatures than at normal temperatures.
Organic host analogues and the search for life on Mars
Abstract Mars analogue sites represent vital tools in our continued study of the Red Planet; the similar physico-chemical processes that shape a given analogue environment on Earth allow researchers
Survival of Microorganisms under the Extreme Conditions of the Atacama Desert
The solar fluences causing 63% loss in viability (F37-values) have been determined and data are discussed with respect to possible similarities between the climatic conditions of the recent Atacama Desert and the deserts of early Mars.
Biological HRPs in wastewater
Fluorescence characteristics of humic-like fluorescent dissolved organic matter produced by various taxa of marine bacteria
The discovery that one bacterial strain showed productivity of humic-like FDOM that was 1 order of magnitude higher than most of the bacterial strains implies that the relative importance of Humic- like FDOM production is different among bacterial genera in the ocean.
Gene annotation and functional analysis of a newly sequenced Synechococcus strain.
The phylogenetic tree based on 16S rRNA sequences indicated that Synechococcus PCC 7336 is highly likely to represent a new branch.
Bacterial biodiversity from Roopkund Glacier, Himalayan mountain ranges, India
The results of principal component analysis based on the 16S rRNA gene clone library data, percentages of OTUs and biogeochemical data revealed that the lake soil samples were different from the glacier soil sample and theBiogeochemical properties affected the diversity of microbial communities in the soil samples.


Photosynthetic Carbon Incorporation and Turnover in Antarctic Cryptoendolithic Microbial Communities: Are They the Slowest-Growing Communities on Earth?
Though microbial community biomass was well within the range of values determined for other microbial communities, community lipid carbon turnover times were among the longest on Earth (ca. 20,000 years).
Geochemical constraints on chemolithoautotrophic reactions in hydrothermal systems
The amount of energy available was more than enough for organic synthesis from CO2 or CO, and/or polymer formation, indicating that the vicinity of hydrothermal systems at the sea floor was an ideal location for the emergence of the first chemolithoautotrophic metabolic systems.
Iron and manganese in anaerobic respiration: environmental significance, physiology, and regulation.
Field studies of iron and/or manganese reduction suggest that organisms with such metabolic abilities play important roles in coupling the oxidation of organic carbon to metal reduction under anaerobic conditions.
Microelectrode studies of the photosynthesis and O2, H2S, and pH profiles of a microbial mat1
The profiles of O,, H,S, and pH within a microbial mat of the hypcrsaline pond Solar Lake, Sinai, were measured by 2-208pm-thick microelectrodes during diurnal and artificial light cycles. The oxygen
Anaerobic oxidation of ferrous iron by purple bacteria, a new type of phototrophic metabolism
Anoxic iron-rich sediment samples that had been stored in the light showed development of brown, rusty patches and the existence of ferrous iron-oxidizing anoxygenic phototrophic bacteria may offer an explanation for the deposition of early banded-iron formations in an assumed anoxic biosphere in Archean times.
Deep bacterial biosphere in Pacific Ocean sediments
ALTHOUGH around 70% of the Earth's surface is marine, little is known about the microbiology of underlying sediments, which can be more than a kilometre deep1. Selective degradation of organic matter
Phylogenetic analysis of the hyperthermophilic pink filament community in Octopus Spring, Yellowstone National Park
The phylogenetic diversity of a well-known pink filament community associated with the 84 to 88 degrees C outflow from Octopus Spring, Yellowstone National Park, was examined and a single sequence type was examined closely related to Aquifex pyrophilus.
Microelectrode Studies of Interstitial Water Chemistry and Photosynthetic Activity in a Hot Spring Microbial Mat
Microelectrodes were used to measure oxygen, pH, and oxygenic photosynthetic activity in a hot spring microbial mat (Octopus Spring, Yellowstone National Park), where the cyanobacterium Synechococcus lividus is the dominant primary producer of the mat.
Halococcus salifodinae sp. nov., an Archaeal Isolate from an Austrian Salt Mine
A novel extremely halophilic archaeon (archaebacterium) was isolated from rock salt obtained from an Austrian salt mine and it is proposed that this isolate should be recognized as a new species and should be named Halococcus salifodinae.
History of water on Mars: a biological perspective.