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Hypersaline Lake Environments Exhibit Reduced Microbial Dormancy
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Book Synopsis Hypersaline Lake Environments Exhibit Reduced Microbial Dormancy by : Joshua Christopher Vert
Download or read book Hypersaline Lake Environments Exhibit Reduced Microbial Dormancy written by Joshua Christopher Vert and published by . This book was released on 2013 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: From acid seeps and deep-sea thermal vents to glacial ice and hypersaline lakes, extreme environments contain relatively simplified communities consisting of extremophiles that have evolved to survive and thrive under adverse abiotic conditions. In more neutral environments, microorganisms use dormancy as a common life history strategy to weather temporal fluctuations of resources or stresses until more 'optimal' conditions are present. It is unclear if dormancy is an essential survival mechanism for microorganisms in extreme environments; however, recent studies suggest that extreme environments may create stable conditions for extremophiles to the extent that dormancy is of less ecological importance. Using lake salinity levels as measurements of "extreme," we evaluated the dormancy of bacterial and archaeal phyla and lake chemistry in five hypersaline and five freshwater lakes across the western United States. Dormancy was calculated using targeted metagenomics to analyze 16S rDNA and rRNA tag sequences. It was hypothesized that bacteria and archaea in hypersaline lake communities would exhibit lower levels dormancy than bacterial and archaeal communities in geologically similar freshwater lake controls. It was also hypothesized that microbial dormancy would decrease as the dominant extreme environmental variable increased in the lakes. As hypothesized, overall dormancy decreased at least 2-fold in hypersaline compared to freshwater lakes for both bacteria and archaea. Of the predominant phyla and subclasses, Firmicutes, Bacteroidetes, and Gammaproteobacteria each demonstrated at least a seven-fold decrease in dormancy in hypersaline lakes compared to freshwater lakes. Specifically, species within the genus Clostridium were responsible for 85% of the dormancy observed in the phylum Firmicutes. Also as hypothesized, microbial dormancy decreased as salinity increased in lakes. Lower dormancy in hypersaline lakes correlated with increasing salinity while lower dormancy in freshwater lakes correlated with increasing total phosphorus levels. These results suggest that dormancy is a less common life history strategy for microorganisms in extreme environments; it is proposed that this is due to the relatively stable environment in hypersaline lakes and the reduced number of available microbial niches. These results also suggest that the dominant extreme stress (i.e., salinity) may override other driving factors in an environment to ultimately determine microbial community composition, diversity and richness.
Book Synopsis HALOPHILIC BACTERIA by : Francisco Rodriguez-Valera
Download or read book HALOPHILIC BACTERIA written by Francisco Rodriguez-Valera and published by Springer. This book was released on 1988 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Mountain Conservation in a Changing World by : Jordi Catalan
Download or read book High Mountain Conservation in a Changing World written by Jordi Catalan and published by Springer. This book was released on 2017-08-03 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides case studies and general views of the main processes involved in the ecosystem shifts occurring in the high mountains and analyses the implications for nature conservation. Case studies from the Pyrenees are preponderant, with a comprehensive set of mountain ranges surrounded by highly populated lowland areas also being considered. The introductory and closing chapters will summarise the main challenges that nature conservation may face in mountain areas under the environmental shifting conditions. Further chapters put forward approaches from environmental geography, functional ecology, biogeography, and paleoenvironmental reconstructions. Organisms from microbes to large carnivores, and ecosystems from lakes to forest will be considered. This interdisciplinary book will appeal to researchers in mountain ecosystems, students and nature professionals. This book is open access under a CC BY license.
Book Synopsis Ecology of Meromictic Lakes by : Ramesh D. Gulati
Download or read book Ecology of Meromictic Lakes written by Ramesh D. Gulati and published by Springer. This book was released on 2017-02-22 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents recent advances in the research on meromictic lakes and a state-of-the art overview of this area. After an introduction to the terminology and geographic distribution of meromictic lakes, three concise chapters describe their physical, chemical and biological features. The following eight chapters present case studies of more than a dozen meromictic lakes, showing the variety of physical and biochemical processes that promote meromixis. The result is a broad picture of the ecology and biochemistry of meromictic lakes in tropical and cold regions, in man-made pit lakes and euxinic marine lakes, and in freshwater as well as hypersaline lakes. In the final chapter the editors provide a synthesis of the topic and conclude that the study of meromictic lakes also offers new insights into the limnology of inland lakes. The book appeals to researchers in the fields of ecology, limnology, environmental physics and biophysics.
Download or read book Saline Lakes written by John M. Melack and published by Springer Science & Business Media. This book was released on 2002-04-30 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publications from 7th International Conference on Salt Lakes, held in Death Valley National Park, California, USA, September 1999
Book Synopsis Model Ecosystems in Extreme Environments by :
Download or read book Model Ecosystems in Extreme Environments written by and published by Academic Press. This book was released on 2019-05-29 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model Ecosystems in Extreme Environments, Second Edition examines ecosystems at the most extreme habitats and their interaction with the environment, providing a key element in our understanding of the role and function of microorganisms in nature. The book highlights current topics in the field, such as biodiversity and the structure of microbial communities in extreme environments, the effects of extreme environmental conditions on microbial ecosystems, and ecological and evolutionary interactions in extreme environments, among other topics. It will be a valuable text for faculty and students working with extremophiles and/or microbial ecology and researchers, including astrobiologists, biologists, evolutionary scientists, astronomers, geochemists and oceanographers. - Explores, in detail, how microbial ecosystems thrive in extreme environments - Highlights the relevance of extremophiles as model ecosystems to the study of microbial ecology - Examines how extreme ecosystems can help our search for life on other planets
Book Synopsis Hypersaline Environments by : Barbara J. Javor
Download or read book Hypersaline Environments written by Barbara J. Javor and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypersaline environments are the principal habitats of petroleum deposition. They are also of intense evolutionary and ecological interest. This book presents a cross-disciplinary examination of the variety of halophilic microorganisms and their roles in modifying the ecology and geochemistry of hypersaline environments. The book also covers in detail the various inland and coastal habitats where halophilic microorganisms thrive. Geographically, hypersaline environments extend from the tropics to the poles, and from the terrestrial to the submarine. Organisms capable of living in such environments have faced unique evolutionary challenges.
Book Synopsis Halophilic Microorganisms and their Environments by : Aharon Oren
Download or read book Halophilic Microorganisms and their Environments written by Aharon Oren and published by Springer Science & Business Media. This book was released on 2006-04-06 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This water" he told me, "runs out to the eastern region, and flows into the Arabah; and when it comes into the sea, into the sea of foul waters [i. e. , the Dead Sea], the water will become wholesome. Every living creature that swarms will be able to live wherever this stream goes; the fish will be very abundant once these waters have reached there. It will be wholesome, and everything will live wherever this stream goes. Fishermen shall stand beside it all the way from En-gedi to En-eglaim; it shall be a place for drying nets; and the fish will be of various kinds [and] most plentiful, like the fish of the Great Sea. " Ezekiel’s prophecy (Ezekiel 47: 8-10) for revival and purification of the Dead Sea waters This new book on "Halophilic Microorganisms and their Environments" is the fifth volume in the COLE series (Cellular Origin and Life in Extreme Habitats (see: http://www. wkap. nl/prod/s/COLE). In the previous books we covered aspects of enigmatic microorganisms, microbial diversity, astrobiology, and symbiosis, so this book on halophilic microbes adds a fitting link to the rest of series' books. Since ancient times hypersaline habitats have been considered extreme environments, and some were thought not to sustain life at all. Yet, every organism requires salt for its existence. Salty places have been compared to an environment of extinction (e. g. , the Dead Sea).
Book Synopsis Freshwater Microbiology by : David C. Sigee
Download or read book Freshwater Microbiology written by David C. Sigee and published by John Wiley & Sons. This book was released on 2005-09-27 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique textbook takes a broad look at the rapidly expanding field of freshwater microbiology. Concentrating on the interactions between viruses, bacteria, algae, fungi and micro-invertebrates, the book gives a wide biological appeal. Alongside conventional aspects such as phytoplankton characterisation, seasonal changes and nutrient cycles, the title focuses on the dynamic and applied aspects that are not covered within the current textbooks in the field. Complete coverage of all fresh water biota from viruses to invertebrates Unique focus on microbial interactions including coverage of biofilms, important communities on all exposed rivers and lakes. New information on molecular and microscopical techniques including a study of gene exchange between bacteria in the freshwater environment. Unique emphasis on the applied aspects of freshwater microbiology with particular emphasis on biodegradation and the causes and remediation of eutrophication and algal blooms.
Book Synopsis Polyextremophiles by : Joseph Seckbach
Download or read book Polyextremophiles written by Joseph Seckbach and published by Springer Science & Business Media. This book was released on 2013-05-13 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many Microorganisms and some macro-organisms can live under extreme conditions. For example, high and low temperature, acidic and alkaline conditions, high salt areas, high pressure, toxic compounds, high level of ionizing radiation, anoxia and absence of light, etc. Many organisms inhabit environments characterized by more than one form of stress (Polyextremophiles). Among them are those who live in hypersaline and alkaline, hot and acidic, cold/hot and high hydrostatic pressure, etc. Polyextremophiles found in desert regions have to copy with intense UV irradiation and desiccation, high as well as low temperatures, and low availability of water and nutrients. This book provides novel results of application to polyextremophiles research ranging from nanotechnology to synthetic biology to the origin of life and beyond.
Book Synopsis Freshwater Microbiology by : Suhaib A. Bandh
Download or read book Freshwater Microbiology written by Suhaib A. Bandh and published by Academic Press. This book was released on 2019-08-01 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freshwater Microbiology: Perspectives of Bacterial Dynamics in Lake Ecosystems provides a comprehensive and systematic analysis of microbial ecology in lakes. It offers basic information on how well the bacterial community composition varies along the spatio-temporal and trophic gradients along with the evaluation of the bioindicator species of bacteria so as to act as a key to predict the trophic status of lake ecosystems. The book helps to identify the factors of potential importance in structuring the bacterial communities in lakes as it delves into the dynamics and diversity of bacterial community composition in relation to various water quality parameters. It helps to identify the possibility of bioremediation plans and devising future policy decisions, with better conservation and management practices. - Provides a comprehensive and systematic analysis of microbial ecology - Helps to identify the factors of potential importance in structuring the bacterial community composition - Gives insight into the bacterial diversity of freshwater lake ecosystems along with their industrial potential - Caters to the needs and aspirations of students and professional researchers
Book Synopsis Halophilic Microorganisms by : Antonio Ventosa
Download or read book Halophilic Microorganisms written by Antonio Ventosa and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various groups of microorganisms - bacteria, archaea, algae and even fungi - have adapted to a life in a hypersaline environment. Halophilic Microorganisms explores the many-fold aspects of life under these extreme conditions. Several contributions analyze the microbial communities in different hypersaline environments such as salterns, soda lakes, and the Dead Sea or salt sediments. Reviews of their biodiversity, phylogeny, and genetics are given as well as of the diverse adaptation strategies of salt-tolerant or salt-requiring microorganisms. Microorganisms that have adapted to moderate salt concentrations or to habitats with drastic fluctuations are also treated in addition to the extreme halophiles. Their physiological, biochemical and molecular mechanisms developed in response to salinity and high osmotic pressure as well as current and future biotechnological applications are presented.
Book Synopsis Extremophiles as Astrobiological Models by : Joseph Seckbach
Download or read book Extremophiles as Astrobiological Models written by Joseph Seckbach and published by John Wiley & Sons. This book was released on 2021-01-13 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The data in this book are new or updated, and will serve also as Origin of Life and evolutionary studies. Endospores of bacteria have a long history of use as model organisms in astrobiology, including survival in extreme environments and interplanetary transfer of life. Numerous other bacteria as well as archaea, lichens, fungi, algae and tiny animals (tardigrades, or water bears) are now being investigated for their tolerance to extreme conditions in simulated or real space environments. Experimental results from exposure studies on the International Space Station and space probes for up to 1.5 years are presented and discussed. Suggestions for extaterrestrial energy sources are also indicated. Audience Researchers and graduate students in microbiology, biochemistry, molecular biology and astrobiology, as well as anyone interested in the search for extraterrestrial life and its technical preparations.
Book Synopsis Microorganisms in Environmental Management by : T. Satyanarayana
Download or read book Microorganisms in Environmental Management written by T. Satyanarayana and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 827 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbes and their biosynthetic capabilities have been invaluable in finding solutions for several intractable problems mankind has encountered in maintaining the quality of the environment. They have, for example, been used to positive effect in human and animal health, genetic engineering, environmental protection, and municipal and industrial waste treatment. Microorganisms have enabled feasible and cost-effective responses which would have been impossible via straightforward chemical or physical engineering methods. Microbial technologies have of late been applied to a range of environmental problems, with considerable success. This survey of recent scientific progress in usefully applying microbes to both environmental management and biotechnology is informed by acknowledgement of the polluting effects on the world around us of soil erosion, the unwanted migration of sediments, chemical fertilizers and pesticides, and the improper treatment of human and animal wastes. These harmful phenomena have resulted in serious environmental and social problems around the world, problems which require us to look for solutions elsewhere than in established physical and chemical technologies. Often the answer lies in hybrid applications in which microbial methods are combined with physical and chemical ones. When we remember that these highly effective microorganisms, cultured for a variety of applications, are but a tiny fraction of those to be found in the world around us, we realize the vastness of the untapped and beneficial potential of microorganisms. At present, comprehending the diversity of hitherto uncultured microbes involves the application of metagenomics, with several novel microbial species having been discovered using culture-independent approaches. Edited by recognized leaders in the field, this penetrating assessment of our progress to date in deploying microorganisms to the advantage of environmental management and biotechnology will be widely welcomed.
Book Synopsis Exploring the Limits of Life in the Extreme Environment of Don Juan Pond, Antarctica by : Amanda Kim Chan
Download or read book Exploring the Limits of Life in the Extreme Environment of Don Juan Pond, Antarctica written by Amanda Kim Chan and published by . This book was released on 2008 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bacterial Metabolism by : H. W. Doelle
Download or read book Bacterial Metabolism written by H. W. Doelle and published by Academic Press. This book was released on 2014-06-28 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bacterial Metabolism focuses on metabolic events that occur in microorganisms, as well as photosynthesis, oxidation, polysaccharide formation, and homofermentation. The book first discusses the thermodynamics of biological reactions, photosynthesis and photometabolism, and chemosynthesis. Free energy, photosynthesis, enzymes, and terminology in bacterial metabolism are elaborated. The manuscript then examines acetic acid bacteria and lactic acid bacteria. Discussions focus on lactate, ethanol, glucose, and glycerol metabolism, glycol oxidation, homofermentation, polysaccharide formation, and electron transport systems. The publication takes a look at pseudomonadaceae and nitrogen metabolism as an energy source for anaerobic microorganisms. Topics include metabolism of pairs of amino acids, single amino acid metabolism, oxidation of glycolate and malonate, and oxygenases. The book is a dependable source of information for readers interested in bacterial metabolism.
Book Synopsis Thermophilic Bacteria by : Jakob K. Kristjansson
Download or read book Thermophilic Bacteria written by Jakob K. Kristjansson and published by CRC Press. This book was released on 1991-11-22 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermophilic Bacteria is a comprehensive volume that describes all major bacterial groups that can grow above 60-65°C (excluding the Archaea). Over 60 different species of aerobic and anaerobic thermophilic bacteria are covered. Isolation, growth methods, characterization and identification, ecology, metabolism, and enzymology of thermophilic bacteria are examined in detail, and an extensive compilation of recent biotechnological applications and the properties of many thermostable enzymes are also included. Major topics discussed in the book include a general review on thermophilic bacteria and archaea; heterotropic bacilli; the genus Thermus; new and rare genera of aerobic heterophophs, such as Saccharococcus, Rhodothermus, and Scotohermus; aerobic chemolithoautotrophic thermophilic bacteria; obligately anaerobic thermophilic bacteria; and hyperthermophilic Thermotogales and thermophilic phototrophs. Extensive bibliographies are also provided for each chapter. The vast amount of information packed into this one volume makes it essential for all microbiologists, biochemists, molecular biologists, and students interested in the expanding field of thermophilicity. Biotechnologists will find the book useful as a source of information on thermophiles or thermostable enzymes of possible industrial use.
