Download or read book Environmental Metagenomics to Assess Microbial Community Diversity in the Deep sea Using 16S RDNA Amplification written by Mandy Hyun-Joo Kim and published by . This book was released on 2005 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The New Science of Metagenomics written by National Research Council and published by National Academies Press. This book was released on 2007-06-24 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although we can't usually see them, microbes are essential for every part of human life-indeed all life on Earth. The emerging field of metagenomics offers a new way of exploring the microbial world that will transform modern microbiology and lead to practical applications in medicine, agriculture, alternative energy, environmental remediation, and many others areas. Metagenomics allows researchers to look at the genomes of all of the microbes in an environment at once, providing a "meta" view of the whole microbial community and the complex interactions within it. It's a quantum leap beyond traditional research techniques that rely on studying-one at a time-the few microbes that can be grown in the laboratory. At the request of the National Science Foundation, five Institutes of the National Institutes of Health, and the Department of Energy, the National Research Council organized a committee to address the current state of metagenomics and identify obstacles current researchers are facing in order to determine how to best support the field and encourage its success. The New Science of Metagenomics recommends the establishment of a "Global Metagenomics Initiative" comprising a small number of large-scale metagenomics projects as well as many medium- and small-scale projects to advance the technology and develop the standard practices needed to advance the field. The report also addresses database needs, methodological challenges, and the importance of interdisciplinary collaboration in supporting this new field.
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 Computational Methods for Evaluating Microbial Diversity written by David Alexander Wolfgang Soergel and published by . This book was released on 2010 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and evaluation of methods for describing the diversity of microbial life in environmental samples is a critical step towards understanding life on earth and towards making prudent interventions in a wide variety of microbe-driven systems. Microbes in the environment, including bacteria, archaea, viruses, and single-celled eukaryotes, are primary drivers of numerous geological and atmospheric processes, such as carbon fixation and sequestration, nutrient cycling, soil formation, and even cloud formation. Cyanobacteria in the surface of the ocean are estimated to be responsible for half of the primary production on earth. Microbes living in and on the human body are intimately involved in health and disease, even when they are not explicitly pathogenic; for instance, the gut is teeming with bacteria that are essential for digestion, but anomalies in this microbial community may contribute to disorders such as Crohn's disease. Environmental bacteria are critically important to climate change, agriculture, and public health, so understanding them has immediate practical importance, in addition to satisfying our scientific curiosity. Environmental microbiology has long been limited by the fact that over 99% of bacteria found in the environment cannot yet be cultured, because the conditions required for growth have not yet been determined. In many cases, bacteria live in interdependent communities of species, making the growth conditions extremely complex and difficult to recreate, even if they could be determined. Thus, it is not possible to perform experiments on these organisms in the lab, or to acquire sufficient DNA to sequence their genomes in isolation. These limitations can be sidestepped through the use of culture-independent surveying techniques. With the availability of ever-cheaper DNA sequencing, methods that involve direct sequencing of DNA from environmental samples have now gained prominence, and are producing a deluge of data. However, the computational methods needed to make sense of these data are still in their infancy. I evaluated methodological choices required for two kinds of culture-independent environmental sequencing techniques: taxonomic surveys using the 16S rRNA, and surveys of both taxonomy and function through shotgun sequencing. In both cases my goals were to increase the effectiveness of future studies in extracting biologically relevant information from environmental sequence datasets, and especially to head off misinterpretations of such datasets due to errors in methodology that have been overlooked to date. Microbial community composition using the 16S ribosomal RNA sequence PCR amplification and sequencing of the gene for the 16S ribosomal RNA subunit directly from environmental samples is a long-standing method of measuring species richness and relative abundance. I demonstrated that the use of sequencing reads that are much shorter than the gene itself (as has recently become economical and thus popular) has the potential to introduce substantial error in such studies. However, I also established, through exhaustive computational experiments, that a judicous choice of PCR and sequencing primers can avoid these errors. In particular, I found that the region following primer E517F provides the maximum available taxonomic information in diverse environments, and that sequencing more than 100nt provides little added value--a fact that justifies the use of next-generation sequencing technologies that are limited to a short read length. Notably, I obtained the same result both regarding supervised classification of sequences into known taxa and regarding unsupervised clustering of similar sequences into potentially unknown taxa. These are very different problems, so the congruence of results confirms that the region following E517F is indeed more informative than other regions. Microbial species identification from environmental shotgun sequencing The second culture-independent sequencing approach I addressed, known as "metagenomics" or "environmental genomics", does not target any specific gene but rather samples DNA sequences from the entire pool in an environment through shotgun sequencing. These data allow assessment of the range of metabolic functions present in a mixture of potentially many thousands of microbial species. A foundational problem in metagenomics is the assignment of sequences to known taxa, and the clustering of sequences into potentially unknown taxa. The surprising finding that sequence composition (i.e., statistical descriptions of the distribution of short words) can be discriminative of species identity has led to a wide range of proposed methods for both the supervised and the unsupervised variants of this "binning" problem, but the validation procedures applied to them have been both inconsistent and unrealistic. It has thus not been clear which method is best, or what performance can be expected in classifying real data. I reimplemented nearly all of the methods in the literature as special cases of a more general framework, allowing me to compare them on a common footing designed to mirror real circumstances. Infrastructure for large-scale reproducible computational research Each of the above projects relies on large-scale simulations, which require careful coordination of thousands of compute jobs and management of their inputs and outputs. This can be particularly daunting in the face of frequent updates to both input datasets and analysis programs, requiring recomputation of dependent results. To manage these computations, I developed Verdant (the "Versioned Data Analysis Tool"), a system for describing, sharing, and executing computational workflows on a cluster that guarantees reproducibility of results. It provides a means of ensuring that a set of computational results are up-to-date with respect to the inputs and thus that they are internally consistent. It also provides a means of sharing inputs, intermediate results, and final outputs in a manner that facilitates collaboration while avoiding redundant computation.
Download or read book Metagenomics for Microbiology written by Jacques Izard and published by Academic Press. This book was released on 2014-11-07 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concisely discussing the application of high throughput analysis to move forward our understanding of microbial principles, Metagenomics for Microbiology provides a solid base for the design and analysis of omics studies for the characterization of microbial consortia. The intended audience includes clinical and environmental microbiologists, molecular biologists, infectious disease experts, statisticians, biostatisticians, and public health scientists. This book focuses on the technological underpinnings of metagenomic approaches and their conceptual and practical applications. With the next-generation genomic sequencing revolution increasingly permitting researchers to decipher the coding information of the microbes living with us, we now have a unique capacity to compare multiple sites within individuals and at higher resolution and greater throughput than hitherto possible. The recent articulation of this paradigm points to unique possibilities for investigation of our dynamic relationship with these cellular communities, and excitingly the probing of their therapeutic potential in disease prevention or treatment of the future. Expertly describes the latest metagenomic methodologies and best-practices, from sample collection to data analysis for taxonomic, whole shotgun metagenomic, and metatranscriptomic studies Includes clear-headed pointers and quick starts to direct research efforts and increase study efficacy, eschewing ponderous prose Presented topics include sample collection and preparation, data generation and quality control, third generation sequencing, advances in computational analyses of shotgun metagenomic sequence data, taxonomic profiling of shotgun data, hypothesis testing, and mathematical and computational analysis of longitudinal data and time series. Past-examples and prospects are provided to contextualize the applications.
Download or read book Microbial Metagenomics Metatranscriptomics and Metaproteomics written by and published by Academic Press. This book was released on 2013-09-19 with total page 683 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new volume of Methods in Enzymology continues the legacy of this premier serial with quality chapters authored by leaders in the field. This volume covers microbial metagenomics, metatranscriptomics, and metaproteomics, and includes chapters on such topics as in-solution FISH for single cell genome preparation, preparation of BAC libraries from marine microbial community DNA, and preparation of microbial community cDNA for metatranscriptomic analysis in marine plankton. Continues the legacy of this premier serial with quality chapters authored by leaders in the field Covers microbial metagenomics, metatranscriptomics, and metaproteomics Contains chapters on such topics as in-solution fluorescence in situ hybridization (FISH) for single cell genome preparation, preparation of BAC libraries from marine microbial community DNA, and preparation of microbial community cDNA for metatranscriptomic analysis in marine plankton
Download or read book Metagenomic Data Analysis written by Suparna Mitra and published by Springer Nature. This book was released on 2023-05-31 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes different sequencing methods, pipelines and tools for metagenome data analyses. Chapters guide readers through quality control of raw sequence data, metagenomics databases for bacterial annotations such Greengenes, SILVA, RDP and GTDB, guide to 16S rRNA microbiome analysis and pipelines such as mothur, DADA2, QIIME2 , whole genome shotgun metagenomics data analyses pipeline using MEGAN and DIAMOND, web service such as PATRIC, RDP, mothur, Kaiju, PhyloPythiaS, MG-RAST, WebMGA, MicrobiomeAnalyst, WHAM!, METAGENassist and MGnify: EBI-Metagenomics, MG-RAST Metagenomics Analysis. Then the chapters inform the readers regarding Third-generation sequencing (TGS) approaches as MinION sequencing and teaches use of Ubuntu Linux Virtual Machine configuration, clinical and environmental resistomes, use of FISH techniques and designing FISH probes, protocols for viral metagenomics, and comprehensive guideline for microbiome analysis using most used R packages. Written in the format of the highly successful Methods in Molecular Biology series, each chapter includes an introduction to the topic, lists necessary materials and methods, includes tips on troubleshooting and known pitfalls, and step-by-step, readily reproducible protocols. Authoritative and cutting-edge, Metagenomic Data Analysis: Methods and Protocols aims to be comprehensive guide for researchers to specialize in the metagenomics field.
Download or read book Marine Metagenomics written by Takashi Gojobori and published by Springer. This book was released on 2019-07-24 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-art marine metagenome research and explains the method of marine metagenomic analysis in an easy-to-understand manner. Changes in the marine environment due to global warming and pollution have become a major global problem. Maintaining a healthy marine ecosystem requires advanced environmental monitoring and assessment systems. As such, the book presents a novel metagenomic monitoring method, which has been developed for comprehensive analyses of the DNA of microorganisms living in seawater to further our understanding of the dynamics of the marine environment. The book can be used as a primer for new researchers and as a manual on experimental methods.
Download or read book The New Science of Metagenomics written by National Research Council and published by National Academies Press. This book was released on 2007-05-24 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although we can't usually see them, microbes are essential for every part of human life-indeed all life on Earth. The emerging field of metagenomics offers a new way of exploring the microbial world that will transform modern microbiology and lead to practical applications in medicine, agriculture, alternative energy, environmental remediation, and many others areas. Metagenomics allows researchers to look at the genomes of all of the microbes in an environment at once, providing a "meta" view of the whole microbial community and the complex interactions within it. It's a quantum leap beyond traditional research techniques that rely on studying-one at a time-the few microbes that can be grown in the laboratory. At the request of the National Science Foundation, five Institutes of the National Institutes of Health, and the Department of Energy, the National Research Council organized a committee to address the current state of metagenomics and identify obstacles current researchers are facing in order to determine how to best support the field and encourage its success. The New Science of Metagenomics recommends the establishment of a "Global Metagenomics Initiative" comprising a small number of large-scale metagenomics projects as well as many medium- and small-scale projects to advance the technology and develop the standard practices needed to advance the field. The report also addresses database needs, methodological challenges, and the importance of interdisciplinary collaboration in supporting this new field.
Download or read book Marine Microbiomes Towards Standard Methods and Best Practices written by Stéphane Pesant and published by Frontiers Media SA. This book was released on 2023-12-14 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: A decade of technological advances and research on the human microbiome has re-defined our understanding of biological systems, and now offers diagnostic tools and new approaches to human health. Likewise, marine ecosystems are driven by their microbiome, the ensemble of microscopic organisms that inhabit the water column, sediments and aquatic organisms, and regulate most fluxes of energy and matter. While the human microbiome is composed principally of bacteria, the marine microbiome has a much broader ensemble of microscopic organisms with sizes spanning from viruses of a few tens of nanometres to metazoans of several centimetres. Advances in high throughput imaging and sequencing are emerging in aquatic science, providing important insights into ecosystem structure and functions, and contributing to develop new indicators of ecosystem health and potential hazards to living resources and humans. A number of research exploration and monitoring programs such as the Tara Oceans global expedition and the Marine Biological Observing Network (MBON), and the rising popularity of environmental DNA (eDNA) already led to a wealth of data. However, the wide range of methodologies used in this early exploration phase poses a challenge to integrative studies, prompting community responses such as the Genomic Standards Consortium. This Research Topic will foster cross-community exchange of standards and best practices. It is an opportunity for the different communities working on marine microbiomes to discuss the advantages and the limitations of their sampling and analysis methods. The collection of papers will constitute a knowledge base aimed at (1) addressing the integration of existing observations from heterogenous methods and data types, and (2) working towards cross-communities standards and best practices for future observations and experiments. This Research Topic will publish comprehensive methodological papers that review a sufficiently large body of field or experimental work. Supporting (meta)data, such as environmental context, sampling materials, sample treatments, extraction and imaging yields, must be provided and should preferably be uploaded to an online sample registry such as BioSamples. Protocols and analytical methods should preferably be uploaded to an online repository such as Protocols.io. We welcome contributions from communities working in different environments: · focus on marine systems, but also interested in estuarine and freshwater systems · coastal, open ocean and deep-sea regions · benthic, pelagic and aerosol environments We strongly encourage contributions from communities involved in: · networks of local observatories and long-term monitoring programs · regional & basin-scale surveys, and global expeditions · biodiscovery linked to economic sectors such as pharmaceutics and bioengineering · environmental and health assessments linked to economic sectors such as aquaculture, fisheries, seabed mining, wind-farms, and oil and gas
Download or read book Using Genomics Metagenomics and Other Omics to Assess Valuable Microbial Ecosystem Services and Novel Biotechnological Applications written by Diana Elizabeth Marco and published by Frontiers Media SA. This book was released on 2019-05-15 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most ecosystem services and goods human populations use and consume are provided by microbial populations and communities. Indeed, numerous provisioning services (e.g. food and enzymes for industrial processes), regulating services (e.g. water quality, contamination alleviation and biological processes such as plant-microbial symbioses), and supporting services (e.g. nutrient cycling, agricultural production and biodiversity) are mediated by microbes. The fast development of metagenomics and other meta-omics technologies is expanding our understanding of microbial diversity, ecology, evolution and functioning. This enhanced knowledge directly translates into the emergence of new applications in an unlimited variety of areas across all microbial ecosystem services and goods. The varied topics addressed in this Research Topic include the development of innovative industrial processes, the discovery of novel natural products, the advancement of new agricultural methods, the amelioration of negative effects of productive or natural microbiological processes, as well as food security and human health, and archeological conservation. The articles compiled provide an updated, high-quality overview of current work in the field. This body of research makes a valuable contribution to the understanding of microbial ecosystem services, and expands the horizon for finding and developing new and more efficient biotechnological applications.
Download or read book Functional Metagenomics Tools and Applications written by Trevor C. Charles and published by Springer. This book was released on 2017-10-09 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the latest tools available for functional metagenomics research are described.This research enables scientists to directly access the genomes from diverse microbial genomes at one time and study these “metagenomes”. Using the modern tools of genome sequencing and cloning, researchers have now been able to harness this astounding metagenomic diversity to understand and exploit the diverse functions of microorganisms. Leading scientists from around the world demonstrate how these approaches have been applied in many different settings, including aquatic and terrestrial habitats, microbiomes, and many more environments. This is a highly informative and carefully presented book, providing microbiologists with a summary of the latest functional metagenomics literature on all specific habitats.
Download or read book Integrated omics Study of Deep sea Microbial Community and New Pseudoalteromonas Isolate written by Jieying Wu and published by . This book was released on 2013 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis research focuses on phylogenetic and functional studies of microbial communities in deep-sea water, an untapped reservoir of high metabolic and genetic diversity of microorganisms. The presence of photosynthetic cyanobacteria and diatoms is an interesting and unexpected discovery during a 16S ribosomal rRNA-based community structure analyses for microbial communities in the deep-sea water of the Pacific Ocean. Both RT-PCR and qRT-PCR approaches were employed to detect expression of the genes involved in photosynthesis of photoautotrophic organisms. Positive results were obtained and further proved the functional activity of these detected photosynthetic microbes in the deep-sea. Metagenomic and metatranscriptomic data was obtained, integrated, and analyzed from deep-sea microbial communities, including both prokaryotes and eukaryotes, from four different deep-sea sites ranging from the mesopelagic to the pelagic ocean. The RNA/DNA ratio was employed as an index to show the strength of metabolic activity of deep-sea microbes. These taxonomic and functional analyses of deep-sea microbial communities revealed a `defensive' life style of microbial communities living in the deep-sea water. Pseudoalteromonas sp. WG07 was subjected to transcriptomic analysis by application of RNA-Seq technology through the transcriptomic annotation using the genomes of closely related surface-water strain Pseudoalteromonas haloplanktis TAC125 and sediment strain Pseudoalteromonas sp. SM9913. The transcriptome survey and related functional analysis of WG07 revealed unique features different from TAC125 and SM9913 and provided clues as to how it adapted to its environmental niche. Also, a comparative transcriptomic analysis of WG07 revealed transcriptome changes between its exponential and stationary growing phases.
Download or read book Hot Brines and Recent Heavy Metal Deposits in the Red Sea written by Egon T. Degens and published by Springer. This book was released on 1969 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accessing Uncultivated Microorganisms written by Karsten Zengler and published by . This book was released on 2008 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a comprehensive overview and discussing developments in the field, this book details various innovative methods used in microbial ecology and environmental microbiology. It also includes all aspects of microbial diversity from bacteria and fungi to protists.
Download or read book The Social Biology of Microbial Communities written by Institute of Medicine and published by National Academies Press. This book was released on 2013-01-10 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with the germ theory of disease in the 19th century and extending through most of the 20th century, microbes were believed to live their lives as solitary, unicellular, disease-causing organisms . This perception stemmed from the focus of most investigators on organisms that could be grown in the laboratory as cellular monocultures, often dispersed in liquid, and under ambient conditions of temperature, lighting, and humidity. Most such inquiries were designed to identify microbial pathogens by satisfying Koch's postulates.3 This pathogen-centric approach to the study of microorganisms produced a metaphorical "war" against these microbial invaders waged with antibiotic therapies, while simultaneously obscuring the dynamic relationships that exist among and between host organisms and their associated microorganisms-only a tiny fraction of which act as pathogens. Despite their obvious importance, very little is actually known about the processes and factors that influence the assembly, function, and stability of microbial communities. Gaining this knowledge will require a seismic shift away from the study of individual microbes in isolation to inquiries into the nature of diverse and often complex microbial communities, the forces that shape them, and their relationships with other communities and organisms, including their multicellular hosts. On March 6 and 7, 2012, the Institute of Medicine's (IOM's) Forum on Microbial Threats hosted a public workshop to explore the emerging science of the "social biology" of microbial communities. Workshop presentations and discussions embraced a wide spectrum of topics, experimental systems, and theoretical perspectives representative of the current, multifaceted exploration of the microbial frontier. Participants discussed ecological, evolutionary, and genetic factors contributing to the assembly, function, and stability of microbial communities; how microbial communities adapt and respond to environmental stimuli; theoretical and experimental approaches to advance this nascent field; and potential applications of knowledge gained from the study of microbial communities for the improvement of human, animal, plant, and ecosystem health and toward a deeper understanding of microbial diversity and evolution. The Social Biology of Microbial Communities: Workshop Summary further explains the happenings of the workshop.
Download or read book Environmental DNA written by Pierre Taberlet and published by Oxford University Press. This book was released on 2018-02-02 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental DNA (eDNA) refers to DNA that can be extracted from environmental samples (such as soil, water, feces, or air) without the prior isolation of any target organism. The analysis of environmental DNA has the potential of providing high-throughput information on taxa and functional genes in a given environment, and is easily amenable to the study of both aquatic and terrestrial ecosystems. It can provide an understanding of past or present biological communities as well as their trophic relationships, and can thus offer useful insights into ecosystem functioning. There is now a rapidly-growing interest amongst biologists in applying analysis of environmental DNA to their own research. However, good practices and protocols dealing with environmental DNA are currently widely dispersed across numerous papers, with many of them presenting only preliminary results and using a diversity of methods. In this context, the principal objective of this practical handbook is to provide biologists (both students and researchers) with the scientific background necessary to assist with the understanding and implementation of best practices and analyses based on environmental DNA.
