Download or read book Identification of Free Living and Particle Associated Microbial Communities Present in Hadal Regions of the Mariana Trench written by Jonathan Tarn and published by . This book was released on 2016 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Relatively few studies have described the microbial populations present in ultra-deep hadal environments, largely as a result of difficulties associated with sampling. Here we report Illumina-tag V6 16S rRNA sequence-based analyses of the free-living and particle-associated microbial communities recovered from locations within two of the deepest hadal sites on Earth, the Challenger Deep (10,918 meters below surface-mbs) and the Sirena Deep (10,667 mbs) within the Mariana Trench, as well as one control site (Ulithi Atoll, 761 mbs). Seawater samples were collected using an autonomous lander positioned ~1 m above the seafloor. The bacterial populations within the Mariana Trench bottom water samples were dissimilar to other deep-sea microbial communities, though with overlap with those of diffuse flow hydrothermal vents and deep-subsurface locations. Distinct particle-associated and free-living bacterial communities were found to exist. The hadal bacterial populations were also markedly different from one another, indicating the likelihood of different chemical conditions at the two sites. In contrast to the bacteria, the hadal archaeal communities were more similar to other less deep datasets and to each other due to an abundance of cosmopolitan deep-sea taxa. The hadal communities were enriched in 34 bacterial and 4 archaeal operational taxonomic units (OTUs) including members of the Gammaproteobacteria, Epsilonproteobacteria, Marinimicrobia, Cyanobacteria, Deltaproteobacteria, Gemmatimonadetes, Atribacteria, Spirochaetes, and Euryarchaeota. Sequences matching cultivated piezophiles were notably enriched in the Challenger Deep, especially within the particle-associated fraction, and were found in higher abundances than in other hadal studies, where they were either far less prevalent or missing. Our results indicate the importance of heterotrophy, sulfur-cycling, and methane and hydrogen utilization within the bottom waters of the deeper regions of the Mariana Trench, and highlight novel community features of these extreme habitats.
Download or read book Climate Change and Microbial Diversity written by Suhaib A. Bandh and published by CRC Press. This book was released on 2022-08-18 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ongoing global climate change triggered by greenhouse gas growth has had a significant effect on the microbial dynamics of plants and soils. This volume explores the various microbial responses of plants and soils caused directly or indirectly by climate change resulting from rising greenhouse gases and other factors. The book considers the rapidly changing environment and the important role of microbiomes in restoring soil and plant health and in creating sustainable approaches. It discusses the adaptation and mitigation of plants and soils, specifically addressing such topics as biogeochemical processes, antimicrobial resistance, the dynamics of bacteria and fungus in extreme environments, bacterial siderophores for sustainability, and more. The volume also looks at edaphic and regeneration performance of tree species in the temperate forests.
Download or read book Tectonic and Environmental Reconstructions Perspectives from Geochemistry and Isotopes of Sedimentary Rocks written by Kai-Jun Zhang and published by Frontiers Media SA. This book was released on 2022-06-02 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deep Carbon Science written by Isabelle Daniel and published by Frontiers Media SA. This book was released on 2021-01-04 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composition and Functional Potential of Hadal Microbial Communities written by Logan Peoples and published by . This book was released on 2018 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hadal trenches, oceanic locations deeper than 6,000 m, are one of the most enigmatic environments on Earth. Characterized by hydrostatic pressures reaching 16,000 pounds per square inch, these sites are expected to contain microbial diversity adapted to in situ conditions and distinct from that found at shallower depths. In this dissertation, we describe the composition and functional potential of microbial communities in the Mariana and Kermadec trenches, two hadal sites in the Pacific Ocean, using high-throughput 16S rRNA gene sequencing, meta- and single-cell genomics, and culture-based analyses. We show that hadopelagic microbial communities, which are distinct from those at abyssal depths, appear adapted to in situ hydrostatic pressure conditions and contain a number of putative hadal bathytypes, including members related to the Marinimicrobia, Rhodobacteraceae, Rhodospirilliceae, and Aquibacter. Hadal sediment consortia contained many novel microbial lineages not previously identified in other datasets, especially within deeper sediment horizons. We characterized the functional potential of these sediment microbes using metagenomics and single-cell sequencing and showed that members of these communities have pathways for diverse carbon utilization and nitrogen and sulfur cycling. Mariana and Kermadec trench pelagic and sediment communities were distinct between one another, in part because of higher primary productivity in the overlying water column in the Kermadec relative to the Mariana Trench. Although trenches are geographically isolated, many abundant lineages in both the pelagic and sediment habitats were related to those found in other hadal and abyssal datasets. Comparisons of genomes from both trenches indicate some members may belong to the same species. These findings show the possibility for dispersal of microbes in the deep-ocean and the connectivity of trenches with each other and shallower sites. Finally, we look to the future of hadal exploration by describing the development of a new full-ocean depth lander and water sampler capable of maintaining high hydrostatic pressure upon recovery. Deployments in the Mariana Trench at depths exceeding 10,700 m and the collection of genomes from the hadal lineages Aquibacter and Marinimicrobia show the power of this instrumentation. This dissertation provides a deep dive into microbial community composition and functional potential within hadal trenches.
Download or read book The Hadal Zone written by Alan Jamieson and published by Cambridge University Press. This book was released on 2015-01-29 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hadal zone represents one of the last great frontiers in marine science, accounting for 45% of the total ocean depth range. Despite very little research effort since the 1950s, the last ten years has seen a renaissance in hadal exploration, almost certainly as a result of technological advances that have made this otherwise largely inaccessible frontier, a viable subject for research. Providing an overview of the geology involved in trench formation, the hydrography and food supply, this book details all that is currently known about organisms at hadal depths and linkages to the better known abyssal and bathyal depths. New insights on how, where and what really survives and thrives in the deepest biozone are provided, allowing this region to be considered when dealing with sustainability and conservation issues in the marine environment.
Download or read book Microbial Community Structure and Function on Sinking Particles in the North Pacific Subtropical Gyre written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sinking particles mediate the transport of carbon and energy to the deep-sea, yet the specific microbes associated with sedimenting particles in the ocean's interior remain largely uncharacterized. In this study, we used particle interceptor traps (PITs) to assess the nature of particle-associated microbial communities collected at a variety of depths in the North Pacific Subtropical Gyre. Comparative metagenomics was used to assess differences in microbial taxa and functional gene repertoires in PITs containing a preservative (poisoned traps) compared to preservative-free traps where growth was allowed to continue in situ (live traps). Live trap microbial communities shared taxonomic and functional similarities with bacteria previously reported to be enriched in dissolved organic matter (DOM) microcosms (e.g., Alteromonas and Methylophaga), in addition to other particle and eukaryote-associated bacteria (e.g., Flavobacteriales and Pseudoalteromonas). Poisoned trap microbial assemblages were enriched in Vibrio and Campylobacterales likely associated with eukaryotic surfaces and intestinal tracts as symbionts, pathogens, or saprophytes. The functional gene content of microbial assemblages in poisoned traps included a variety of genes involved in virulence, anaerobic metabolism, attachment to chitinaceaous surfaces, and chitin degradation. The presence of chitinaceaous surfaces was also accompanied by the co-existence of bacteria which encoded the capacity to attach to, transport and metabolize chitin and its derivatives. Distinctly different microbial assemblages predominated in live traps, which were largely represented by copiotrophs and eukaryote-associated bacterial communities. Predominant sediment trap-assocaited eukaryotic phyla included Dinoflagellata, Metazoa (mostly copepods), Protalveolata, Retaria, and Stramenopiles. In conclusion, these data indicate the central role of eukaryotic taxa in structuring sinking particle microbial assemblages, as well as the rapid responses of indigenous microbial species in the degradation of marine particulate organic matter (POM) in situ in the ocean's interior.
Download or read book Microbial Ecology of Extreme Environments written by Caroline Chénard and published by Springer. This book was released on 2017-03-15 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores microbial lifestyles, biochemical adaptations, and trophic interactions occurring in extreme environments. By summarizing the latest findings in the field it provides a valuable reference for future studies. Spark ideas for biotechnological and commercial exploitation of microbiomes at the extremes of life are presented. Chapters on viruses complement this highly informative book. In a vertical journey through the microbial biosphere it covers aspects of cold environments, hot environments, extreme saline environments, and extreme pressure environments, and more. From the deep sea, through polar deserts, up to the clouds in the air - the diversity of microbial life in all habitats is described, explored, and comprehensively reviewed. Possible biotechnical applications are discussed. This book aims to provide a useful reference for those who want to start a research program in extreme microbiology and, hopefully, inspire new research directions.
Download or read book Microbial Communities of Polar and Alpine Soils written by Laura Zucconi and published by Frontiers Media SA. This book was released on 2021-11-10 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Status of Natural Resources on the High seas written by Southampton Oceanography Centre and published by IUCN. This book was released on 2001 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Sampling in the Deep Sea written by Malcolm R. Clark and published by John Wiley & Sons. This book was released on 2016-03-16 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The deep sea covers over 60% of the surface of the earth, yet less than 1% has been scientifically investigated. There is growing pressure on deep-sea resources and on researchers to deliver information on biodiversity and the effects of human impacts on deep-sea ecosystems. Although scientific knowledge has increased rapidly in recent decades, there exist large gaps in global sampling coverage of the deep sea, and major efforts continue to be directed into offshore research. Biological Sampling in the Deep Sea represents the first comprehensive compilation of deep-sea sampling methodologies for a range of habitats. It reviews the real life applications of current, and in some instances developing, deep-sea sampling tools and techniques. In creating this book the authors have been able to draw upon the experiences of those at the coal face of deep-sea sampling, expanding on the existing methodological texts whilst encompassing a level of technical detail often omitted from journal publications. Ultimately the book will promote international consistency in sampling approaches and data collection, advance the integration of information into global databases, and facilitate improved data analyses and consequently uptake of science results for the management and conservation of the deep-sea environment. The book will appeal to a range of readers, including students, early-career through to seasoned researchers, as well as environmental managers and policy makers wishing to understand how the deep-sea is sampled, the challenges associated with deep survey work, and the type of information that can be obtained.
Download or read book Ecosystems of the Deep Oceans written by P.A. Tyler and published by Elsevier. This book was released on 2003-03-27 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume examines the deep sea ecosystem from a variety of perspectives. The initial chapters examine the deep-sea floor, the deep pelagic environment and the more specialised chemosynthetic environments of hydrothermal vents and cold seeps. These environments are examined from the perspective of the relationship of deep-sea animals to their physico-chemical environment.Later chapters examine the biogeography of the main deep oceans (Atlantic, Pacific and Indian) with particular attention to the downward flux of surface-derived organic matter and how this drives the processes within the deep-sea ecosystem. The peripheral deep seas including the polar seas and the marginal deep seas (inter alia the Mediterranean, Red, Caribbean and Okhotsk seas) are explored in the same context. The final chapters examine the processes occurring in the deep sea and include an analysis of why the deep sea has high species diversity, how the fauna respond to organic input and how species have adapted reproductive activity in the deep sea. The volume concludes with an analysis of the anthropogenic impact on the deep sea.
Download or read book High pressure Microbiology written by Chris Michiels and published by . This book was released on 2008 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important volume will be crucial not only to microbiologists researching high pressure but also to those interested in microbial stress responses, microbial physiology, and extreme environments.
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 Method Comparison for the Characterisation of Particale Associated vs Free living Microbial Communities written by Lucy S. Henshall and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Carbon Biogeochemistry written by Jack J. Middelburg and published by Springer. This book was released on 2019-01-25 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book discusses biogeochemical processes relevant to carbon and aims to provide readers, graduate students and researchers, with insight into the functioning of marine ecosystems. A carbon centric approach has been adopted, but other elements are included where relevant or needed. The book focuses on concepts and quantitative understanding of primary production, organic matter mineralization and sediment biogeochemistry. The impact of biogeochemical processes on inorganic carbon dynamics and organic matter transformation are also discussed.
Download or read book World Atlas of Biodiversity written by Brian Groombridge and published by Univ of California Press. This book was released on 2002 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global biological diversity, ecosystem diversity.
