Download or read book A Molecular Analysis of Subsurface Microbial Communities Across a Hydrothermal Gradient in Okinawa Trough Sediments written by Leah Brandt and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Decades ago, life in the deep subseafloor was assumed to be non-existent. At thousands of meters under the surface and decoupled from the photic zone, the deep marine world is a hostile environment. However, the discovery of life thriving around deep-sea hydrothermal vent systems revolutionized our perception of the extent and tenacity of life on Earth and set in motion a movement to understand life at the seafloor and its significant in global biogeochemical and nutrient cycling. Seafloor sediments host an incredible diversity of microbial life, and much interest has sought to understand the spatial and stratigraphic extent of the biosphere, and also taxonomic and functional capacities of such resilient organisms. This dissertation represents a series of studies centered around these concepts I analyze samples from a sediment profile exposed to a hydrothermal gradient as a scaled-down proxy for how microbial life may exist and/or adapt to conditions as they become buried deeper into the subsurface.I have focused on the application of culture-independent, molecular methods to understand whether the taxonomic and functional data reflect changes through this temperature gradient in support of a more temperature-adapted microbial community. In chapter 2, I examined the microbial community composition at approximately meter intervals by analyzing the taxonomically specific 16S rRNA marker gene. We presumed the biosphere to be restricted to only the upper 15 m, based on phylotype vetting and decreased sequencing recovery below. However, we observed a significant proportion of archaeal sequences throughout the 15 m, with a particularly high abundance in the deepest 15 m horizon. An in-depth look at the taxa at 15 m indicates an appearance of an uncultured, high-temperature taxon here, and an abundance of a thermophilic, methane-oxidizing archaeon, which suggests thermophilic niche at this particular temperature/depth regime. The exciting results from Chapter 2 were the motivation for a continued metagenomics analysis of select samples in the same sediment profile for Chapter 3. Probing through total genomic DNA from six samples, I found evidence for temperature-dependent trends through the detection of genes of specific proteins involved in thermal processes, and attempted to correlate these genes with a taxonomic identity. I found that the deepest, hottest sample encompassed organisms from both thermophilic and hyperthermophilic temperature regimes. The dichotomy reflected between the existence of two temperature-specific niches implies that, due to the dynamic nature of the hydrothermal vent system, the deepest horizon may be undergoing a transition in temperature, thus, microbial community. Lastly, Chapter 4 was intended to provide a dataset from extractable RNA in order to distinguish representatives of the active microbial population from those represented from extant DNA; however, many challenges encountered in extraction and sequencing yield have restricted the dataset and ability to make reliable interpretations.Considering the current state of knowledge in the marine subsurface due to its challenges in sampling, low biomass yield, and diversity distantly related to what is known from surface life, this work herein contributes greatly to our understanding of microbial biogeography in terms of temperature constraints in marine subsurface sediments. The challenges in phylotype vetting and need for quality controls speak to the degree of complexities in performing and interpreting molecular analyses from subseafloor sediments. Moreover, I have also produced significant datasets, both 16S rRNA gene and metagenomics, that can continue to be used for future investigations and comparisons of microbial life in the marine seafloor.
Download or read book Microbial Life of the Deep Biosphere written by Jens Kallmeyer and published by Walter de Gruyter. This book was released on 2014-04-01 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last two decades, exploration of the deep subsurface biosphere has developed into a major research area. New findings constantly challenge our concepts of global biogeochemical cycles and the ultimate limits to life. In order to explain our observations from deep subsurface ecosystems it is necessary to develop truly interdisciplinary approaches, ranging from microbiology and geochemistry to physics and modeling. This book aims to bring together a wide variety of topics, covering the broad range of issues that are associated with deep biosphere exploration. Not only does the book present case studies of selected projects, but also treats questions arising from our current knowledge. Despite nearly two decades of research, there are still many boundaries to exploration caused by technical limitations and one section of the book is devoted to these technical challenges and the latest developments in this field. This volume will be of high interest to biologists, chemists and earth scientists all working on the deep biosphere.
Download or read book Past and Present Water Column Anoxia written by Lev N. Neretin and published by Springer Science & Business Media. This book was released on 2006-01-02 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop, held in Yalta, Crimea, Ukraine, 4-8 October 2003
Download or read book Microbial Sulfur Metabolism written by Christiane Dahl and published by Springer Science & Business Media. This book was released on 2007-09-09 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revealing book details recent developments in the study of the relationship between sulfur and the microbial agents that affect its metabolism. In recent years, new methods have been applied to study the biochemistry and molecular biology of reactions of the global sulfur cycle, the microorganisms involved and their physiology, metabolism and ecology. These activities have uncovered fascinating new insights for the understanding of aerobic and anaerobic sulfur metabolism.
Download or read book Deep Carbon written by Beth N. Orcutt and published by Cambridge University Press. This book was released on 2019-10-17 with total page 687 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide to carbon inside Earth - its quantities, movements, forms, origins, changes over time and impact on planetary processes. This title is also available as Open Access on Cambridge Core.
Download or read book Marine Geochemistry written by Horst D. Schulz and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of the latest research in this field. The topics comprise the sedimentological examination and physical properties of the sedimentary solid phase, pore water and pore water constituents, organic matter as the driving force of most microbiological processes, biotic and abiotic redox reactions, carbonates and stable isotopes as proxies for paleoclimate reconstruction, metal enrichments in ferromanganese nodules and crusts as well as in hot vents and cold seeps on the seafloor. The current model conceptions lead to the development of different types of computer models, allowing the global mass exchanges between oceans and sediments to be balanced.
Download or read book The Prokaryotes written by Edward F. DeLong and published by Springer. This book was released on 2014-10-13 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Prokaryotes is a comprehensive, multi-authored, peer reviewed reference work on Bacteria and Achaea. This fourth edition of The Prokaryotes is organized to cover all taxonomic diversity, using the family level to delineate chapters. Different from other resources, this new Springer product includes not only taxonomy, but also prokaryotic biology and technology of taxa in a broad context. Technological aspects highlight the usefulness of prokaryotes in processes and products, including biocontrol agents and as genetics tools. The content of the expanded fourth edition is divided into two parts: Part 1 contains review chapters dealing with the most important general concepts in molecular, applied and general prokaryote biology; Part 2 describes the known properties of specific taxonomic groups. Two completely new sections have been added to Part 1: bacterial communities and human bacteriology. The bacterial communities section reflects the growing realization that studies on pure cultures of bacteria have led to an incomplete picture of the microbial world for two fundamental reasons: the vast majority of bacteria in soil, water and associated with biological tissues are currently not culturable, and that an understanding of microbial ecology requires knowledge on how different bacterial species interact with each other in their natural environment. The new section on human microbiology deals with bacteria associated with healthy humans and bacterial pathogenesis. Each of the major human diseases caused by bacteria is reviewed, from identifying the pathogens by classical clinical and non-culturing techniques to the biochemical mechanisms of the disease process. The 4th edition of The Prokaryotes is the most complete resource on the biology of prokaryotes. The following volumes are published consecutively within the 4th Edition: Prokaryotic Biology and Symbiotic Associations Prokaryotic Communities and Ecophysiology Prokaryotic Physiology and Biochemistry Applied Bacteriology and Biotechnology Human Microbiology Actinobacteria Firmicutes Alphaproteobacteria and Betaproteobacteria Gammaproteobacteria Deltaproteobacteria and Epsilonproteobacteria Other Major Lineages of Bacteria and the Archaea
Download or read book Geomicrobiology Molecular and Environmental Perspective written by Alexander Loy and published by Springer Science & Business Media. This book was released on 2010-07-23 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction of microorganisms with geological activities results in processes influencing development of the Earth’s geo- and biospheres. In assessing these microbial functions, scientists have explored short- and longterm geological changes attributed to microorganisms and developed new approaches to evaluate the physiology of microbes including microbial interaction with the geological environment. As the field of geomicrobiology developed, it has become highly interdisciplinary and this book provides a review of the recent developments in a cross section of topics including origin of life, microbial-mineral interactions and microbial processes functioning in marine as well as terrestrial environments. A major component of this book addresses molecular techniques to evaluate microbial evolution and assess relationships of microbes in complex, natural c- munities. Recent developments in so-called ‘omics’ technologies, including (meta) genomics and (meta)proteomics, and isotope labeling methods allow new insights into the function of microbial community members and their possible geological impact. While this book summarizes current knowledge in various areas, it also reveals unresolved questions that require future investigations. Information in these chapters enhances our fundamental knowledge of geomicrobiology that contributes to the exploitation of microbial functions in mineral and environmental biotechn- ogy applications. It is our hope that this book will stimulate interest in the general field of geomicrobiology and encourage others to explore microbial processes as applied to the Earth.
Download or read book Metalliferous Sediments of the World Ocean written by Evgeny G. Gurvich and published by Springer Science & Business Media. This book was released on 2006-01-16 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dramatic advances in understanding global tectonics have been made in the last half century and the information and specific data acquired on the floor of the World Ocean by the scientific community probably has exc- ded that available in all previous time. With the benefit of new technology and advanced concepts in the earth sciences extensive exploration of the deep seabed became possible, and has been carried out in many parts of the world. Many features have been recognized and data recorded that are vital for understanding the fundamental processes that shape the earth=s surface and control the habitable environment. The data collected to date on the o- an floor and its physical environment greatly exceeds our understanding and appreciation of their fundamental importance in the earth sciences, and our ability to apply this knowledge effectively in improving our way of life. With his extensive scientific knowledge and unique experience from - ny cruises in association with scientists throughout the world, Dr. Evgeny Gurvich has made an outstanding contribution in acquiring basic data on hydrothermal and sedimentation processes in the ocean, as well as in the synthesis of data and concepts available from cruise reports and an extensive literature.
Download or read book Geochemistry of Marine Sediments written by David J. Burdige and published by Princeton University Press. This book was released on 2020-08-04 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The processes occurring in surface marine sediments have a profound effect on the local and global cycling of many elements. This graduate text presents the fundamentals of marine sediment geochemistry by examining the complex chemical, biological, and physical processes that contribute to the conversion of these sediments to rock, a process known as early diagenesis. Research over the past three decades has uncovered the fact that the oxidation of organic matter deposited in sediment acts as a causative agent for many early diagenetic changes. Summarizing and discussing these findings and providing a much-needed update to Robert Berner's Early Diagenesis: A Theoretical Approach, David J. Burdige describes the ways to quantify geochemical processes in marine sediment. By doing so, he offers a deeper understanding of the cycling of elements such as carbon, nitrogen, and phosphorus, along with important metals such as iron and manganese. No other book presents such an in-depth look at marine sediment geochemistry. Including the most up-to-date research, a complete survey of the subject, explanatory text, and the most recent mathematical formulations that have contributed to our greater understanding of early diagenesis, Geochemistry of Marine Sediments will interest graduate students of geology, geochemistry, and oceanography, as well as the broader community of earth scientists. It is poised to become the standard text on the subject for years to come.
Download or read book Subseafloor Biosphere Linked to Hydrothermal Systems written by Jun-ichiro Ishibashi and published by Springer. This book was released on 2015-01-10 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the comprehensive volume of the TAIGA (“a great river ” in Japanese) project. Supported by the Japanese government, the project examined the hypothesis that the subseafloor fluid advection system (subseafloor TAIGA) can be categorized into four types, TAIGAs of sulfur, hydrogen, carbon (methane), and iron, according to the most dominant reducing substance, and the chemolithoautotrophic bacteria/archaea that are inextricably associated with respective types of TAIGAs which are strongly affected by their geological background such as surrounding host rocks and tectonic settings. Sub-seafloor ecosystems are sustained by hydrothermal circulation or TAIGA that carry chemical energy to the chemosynthetic microbes living in an extreme environment. The results of the project have been summarized comprehensively in 50 chapters, and this book provides an overall introduction and relevant topics on the mid-ocean ridge system of the Indian Ocean and on the arc-backarc systems of the Southern Mariana Trough and Okinawa Trough.
Download or read book Fundamentals of Geobiology written by Andrew H. Knoll and published by John Wiley & Sons. This book was released on 2012-03-30 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2012 PROSE Award, Earth Science: Honorable Mention For more than fifty years scientists have been concerned with the interrelationships of Earth and life. Over the past decade, however, geobiology, the name given to this interdisciplinary endeavour, has emerged as an exciting and rapidly expanding field, fuelled by advances in molecular phylogeny, a new microbial ecology made possible by the molecular revolution, increasingly sophisticated new techniques for imaging and determining chemical compositions of solids on nanometer scales, the development of non-traditional stable isotope analyses, Earth systems science and Earth system history, and accelerating exploration of other planets within and beyond our solar system. Geobiology has many faces: there is the microbial weathering of minerals, bacterial and skeletal biomineralization, the roles of autotrophic and heterotrophic metabolisms in elemental cycling, the redox history in the oceans and its relationship to evolution and the origin of life itself.. This book is the first to set out a coherent set of principles that underpin geobiology, and will act as a foundational text that will speed the dissemination of those principles. The chapters have been carefully chosen to provide intellectually rich but concise summaries of key topics, and each has been written by one or more of the leading scientists in that field.. Fundamentals of Geobiology is aimed at advanced undergraduates and graduates in the Earth and biological sciences, and to the growing number of scientists worldwide who have an interest in this burgeoning new discipline. Additional resources for this book can be found at: http://www.wiley.com/go/knoll/geobiology.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extremophiles in Deep Sea Environments written by K. Horikoshi and published by Springer Science & Business Media. This book was released on 1999-11-01 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many organisms in deep-sea environments are extremophiles thriving in extreme conditions: high pressure, high or low temperature, or high concentrations of inorganic compounds. This book presents the microbiology of extremophiles living in the deep sea and describes the isolation, cultivation, and taxonomic identification of microorganisms retrieved from the Mariana Trench, the world's deepest point. Also explained are techniques for recovering pressure-loving bacteria, the barophiles (piezophiles), and for whole genome analysis of Bacillus halodurans C-125. Physiological analysis of the pressure effect in Saccharomyces cerevisiae and Escherichia coli is used to answer the question of how deep-sea organisms survive under high hydrostatic pressure. These research results are useful in both basic science and industrial applications. Readers discover a new microbial world in the ocean depths, with state-of-the-science information on extremophiles.
Download or read book Marine Hydrocarbon Seeps written by Andreas Teske and published by Springer Nature. This book was released on 2020-02-04 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date overview of the microbiology, biogeochemistry, and ecology of marine hydrocarbon seeps, a globally occurring habitat for specialized microorganisms and invertebrates that depend on natural hydrocarbon seepage as a food and energy source. Prominent examples include the briny hydrocarbon seeps and mud volcanoes on the continental slope of the Gulf of Mexico and in the Mediterranean, the hydrothermally heated hydrocarbon seeps at Guaymas Basin (Mexico), and the oil and gas seeps off the coast of California and in the Gulf of Mexico. Featuring topical chapters by leading researchers in the area, the book describes geological settings, chemical characteristics of hydrocarbon seepage, hydrocarbon-dependent microbial populations, and ecosystem structure and trophic networks at hydrocarbon seeps. Further, it also discusses applied aspects such as bioremediation potential (oil-degrading microorganisms).
Download or read book Subsea Mineral Resources written by Vincent Ellis McKelvey and published by . This book was released on 1986 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earth and Life Processes Discovered from Subseafloor Environments written by and published by Elsevier. This book was released on 2014-12-03 with total page 829 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Integrated Ocean Drilling Program (IODP: 2000-2013) has provided crucial records of past and present processes and interactions within and between the biosphere, cryosphere, atmosphere, hydrosphere and geosphere. Research in IODP encompasses a wide range of fundamental and applied issues that affect society, such as global climate change, biodiversity, the origin of life, natural hazards involving the study of earthquakes processes, and the internal structure and dynamics of our planet. This compilation of major findings from the 2003-2013/14 phase of IODP, focusing on scientific results rather than description of data acquisition and early inferences, provides invaluable information. Anyone wondering what scientific drilling can achieve will gain quick understanding of the range of questions that are uniquely addressed with this methodology and the ways these data dovetail with other regional information. The excitement of breakthrough findings that occasionally accompanies a drilling project will be evident. IODP obtained unique records from the global ocean basins during the 2003-2013 program phase. This book highlights findings in three theme areas: Subseafloor life and the marine biosphere; Earth's changing environments; and Dynamics of the solid Earth. Each core or borehole log provides a window revealing insights that no other data achieve. - Presents syntheses of key results from the Integrated Ocean Drilling Program - Encompasses a wide range of issues that affect society - Describes the Integrated Ocean Drilling Program and its expeditions
