Trophodynamics Of The Benthic Food Webs In The Chukchi And Beaufort Seas Alaska

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Trophodynamics of the Benthic Food Webs in the Chukchi and Beaufort Seas, Alaska

Author : Nathan David McTigue
Publisher :
ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (872 download)

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Book Synopsis Trophodynamics of the Benthic Food Webs in the Chukchi and Beaufort Seas, Alaska by : Nathan David McTigue

Download or read book Trophodynamics of the Benthic Food Webs in the Chukchi and Beaufort Seas, Alaska written by Nathan David McTigue and published by . This book was released on 2013 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chukchi and Beaufort Sea shelves host diverse and productive seafloor ecosystems important for carbon and nitrogen cycling for the Arctic Ocean. The benthic food web transfers energy from primary producers to high trophic level organisms (e.g., birds, fish, and mammals), which are important for cultural practices and subsistence hunting by Native Alaskans. This work focuses on the trophic ecology of arctic food webs through use of several different approaches. First, variation in the natural abundance of stable carbon and nitrogen isotopes facilitated the identification of trophic pathways and, subsequently, allowed the comparison of trophic guilds and food webs from the Chukchi and Beaufort Seas. Compared to water column and sedimentary organic matter end-members, second trophic level grazers and suspension feeders were conspicuously 13C-enriched throughout the Chukchi Sea, which supports the hypothesis that microbial degradation of organic matter occurred prior to metazoan assimilation. Second, food web recovery from disturbances caused by exploratory oil drilling at the seafloor that had occurred approximately 20 years prior were assessed in both the Chukchi and Beaufort Seas. Based on isotopic trophic niche overlap between organisms common to drilled and reference sites in the Chukchi and Beaufort Seas, the oil drilling sites had similar food web structure, indicating recovery from the activity associated with the drilling process. Third, photosynthetic pigment biomarkers were used to better understand the diagenetic process, specifically focusing on how both microbial and metazoan grazing pathways degrade organic matter in relation to seasonal sea ice retreat in the Chukchi Sea. The benthic macrofaunal and microbial food web caused rapid degradation of organic matter upon the initial pulse of microalgal food sources to the seafloor. These diagenetic pathways are linked to the 13C-enrichment of residual organic matter, which corresponds to the stable isotope values measured in the benthic macrofauna. Lastly, high-precision liquid chromatography and spectrophotometry were compared for estimating sedimentary pigments in the marine environment. Substantial differences in pheopigment (chlorophyll degradation products) concentrations were observed between the two techniques, suggesting the need for revisions to the monochromatic spectrophotometric equation that relates absorbance to pigment concentrations. One pheopigment, pheophorbide, was found to interfere with the accuracy of the spectrophotometric equation and caused the overestimation of pheopigments.

Canadian Journal of Zoology

Author :
Publisher :
ISBN 13 :
Total Pages : 512 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Canadian Journal of Zoology by :

Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2013 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Marine Fishes of Arctic Canada

Author : Brian W. Coad
Publisher : University of Toronto Press
ISBN 13 : 1442647108
Total Pages : 633 pages
Book Rating : 4.4/5 (426 download)

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Book Synopsis Marine Fishes of Arctic Canada by : Brian W. Coad

Download or read book Marine Fishes of Arctic Canada written by Brian W. Coad and published by University of Toronto Press. This book was released on 2018-01-01 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Fishes of Arctic Canada is an accessible and up-to-date study on the diverse marine fish population existing in Canadian waters.

The Alaskan Beaufort Sea

Author : Peter W. Barnes
Publisher : Elsevier
ISBN 13 : 148326839X
Total Pages : 483 pages
Book Rating : 4.4/5 (832 download)

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Book Synopsis The Alaskan Beaufort Sea by : Peter W. Barnes

Download or read book The Alaskan Beaufort Sea written by Peter W. Barnes and published by Elsevier. This book was released on 2013-09-17 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaskan Beaufort Sea: Ecosystems and Environments provides an interdisciplinary view into almost all aspects of the environment, with a detailed survey of the background literature. This book focuses on the Alaskan Beaufort Shelf environment. Organized into four parts encompassing 20 chapters, this book begins with an overview of the characteristics and history of the region in which the research took place and defines the objectives of the studies program. This text then examines the subsynoptic meteorological networks along the Beaufort Sea coast and shelf. Other chapters consider the thermally generated mesoscale effects on surface winds and the orographic mesoscale effects on surface winds. This book discusses as well the phytoplankton associations and relative phytoplankton production in the area between the 20-m depth contour and the edge of the ice in summer. The final chapter deals with the characteristics of the ice cover and oil-ice interactions that will affect cleanup activities after blowout. This book is a valuable resource for scientists and conservationists.

Zooplankton Ecology

Author : Maria Alexandra Teodosio
Publisher : CRC Press
ISBN 13 : 135102180X
Total Pages : 460 pages
Book Rating : 4.3/5 (51 download)

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Book Synopsis Zooplankton Ecology by : Maria Alexandra Teodosio

Download or read book Zooplankton Ecology written by Maria Alexandra Teodosio and published by CRC Press. This book was released on 2020-11-19 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims at providing students and researchers an advanced integrative overview on zooplankton ecology, covering marine and freshwater organisms, from microscopic phagotrophic protists, to macro-jellyfishes and active fish larvae. The first book section addresses zooplanktonic organisms and processes, the second section is devoted to zooplankton spatial and temporal distribution patterns and trophic dynamics, and the final section is dedicated to emergent methodological approaches (e.g., omics). Book chapters include comprehensive synthesis, observational and manipulative studies, and sediment-based analysis, a vibrant imprint of benthic-pelagic coupling and ecosystem connectivity. Most chapters also address the impacts of anticipated environmental changes (e.g., warming, acidification).

The Environment of the Deep Sea

Author : Wallace Gary Ernst
Publisher : Prentice Hall
ISBN 13 :
Total Pages : 392 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis The Environment of the Deep Sea by : Wallace Gary Ernst

Download or read book The Environment of the Deep Sea written by Wallace Gary Ernst and published by Prentice Hall. This book was released on 1982 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Natural History of an Arctic Oil Field

Author : Joe C. Truett
Publisher : Elsevier
ISBN 13 : 0080512410
Total Pages : 461 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis The Natural History of an Arctic Oil Field by : Joe C. Truett

Download or read book The Natural History of an Arctic Oil Field written by Joe C. Truett and published by Elsevier. This book was released on 2000-06-09 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of the harsh conditions that characterize the Arctic, it is a surprisingly fragile ecosystem. The exploration for oil in the Arctic over the past 30 years has had profound effects on the plants and animals that inhabit this frozen clime. The Natural History of an Arctic Oil Field synthesizes decades of research on these myriad impacts. Specialists with years of field experience have contributed to this volume to create the first widely available synopsis of the ecology and wildlife biology of animals and plants living in close association with an actively producing oil field. First widely available synthesis of arctic oil field ecology and wildlife biology Concise yet readable treatment of a diverse polar ecosystem Useful for land managers, policy makers as well as ecologists, and population biologists Chapters authored by recognized authorities and contributions are peer-reviewed for accuracy and scientific rigor Illustrations attractively designed to enhance comprehension

A Little Less Arctic

Author : Steven H. Ferguson
Publisher : Springer Science & Business Media
ISBN 13 : 9048191211
Total Pages : 313 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis A Little Less Arctic by : Steven H. Ferguson

Download or read book A Little Less Arctic written by Steven H. Ferguson and published by Springer Science & Business Media. This book was released on 2010-05-30 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Arctic Canada, Hudson Bay is a site of great exploration history, aboriginal culture, and a vast marine wilderness supporting large populations of marine mammals and birds. These include some of the most iconic Arctic animals like beluga, narwhal, bowhead whales, and polar bears. Due to the challenges of conducting field research in this region, some of the mysteries of where these animals move, and how they are able to survive in such seemingly inhospitable, ice-choked habitats are just now being unlocked. For example, are polar bears being replaced by killer whales? This new information could not be more salient, as the Hudson Bay Region is undergoing rapid environmental change due to global warming, as well as increased pressures from industrial development interests. A Little Less Arctic brings together some of the world’s leading Arctic scientists to present the current state of knowledge on the physical and biological characteristics of Hudson Bay.

Combining Iñupiaq and Scientific Knowledge

Author : Alex V. Whiting
Publisher :
ISBN 13 : 9781566121613
Total Pages : 0 pages
Book Rating : 4.1/5 (216 download)

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Book Synopsis Combining Iñupiaq and Scientific Knowledge by : Alex V. Whiting

Download or read book Combining Iñupiaq and Scientific Knowledge written by Alex V. Whiting and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Geographic Information Systems in Oceanography and Fisheries

Author : Vasilis D. Valavanis
Publisher : CRC Press
ISBN 13 : 0203303180
Total Pages : 209 pages
Book Rating : 4.2/5 (33 download)

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Book Synopsis Geographic Information Systems in Oceanography and Fisheries by : Vasilis D. Valavanis

Download or read book Geographic Information Systems in Oceanography and Fisheries written by Vasilis D. Valavanis and published by CRC Press. This book was released on 2002-05-23 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last two decades there has been increasing recognition that problems in oceanography and fisheries sciences and related marine areas are nearly all manifest in the spatio-temporal domain. Geographical Information Systems (GIS), the natural framework for spatial data handling, are being recognized as powerful tools with useful applications

Isoscapes

Author : Jason B. West
Publisher : Springer Science & Business Media
ISBN 13 : 9048133548
Total Pages : 495 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Isoscapes by : Jason B. West

Download or read book Isoscapes written by Jason B. West and published by Springer Science & Business Media. This book was released on 2009-11-25 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stable isotope ratio variation in natural systems reflects the dynamics of Earth systems processes and imparts isotope labels to Earth materials. Carbon isotope ratios of atmospheric CO2 record exchange of carbon between the biosphere and the atmosphere; the incredible journeys of migrating monarchs is documented by hydrogen isotopes in their wings; and water carries an isotopic record of its source and history as it traverses the atmosphere and land surface. Through these and many other examples, improved understanding of spatio-temporal isotopic variation in Earth systems is leading to innovative new approaches to scientific problem-solving. This volume provides a comprehensive overview of the theory, methods, and applications that are enabling new disciplinary and cross-disciplinary advances through the study of "isoscapes": isotopic landscapes. "This impressive new volume shows scientists deciphering and using the natural isotope landscapes that subtly adorn our spaceship Earth.", Brian Fry, Coastal Ecology Institute, Louisiana State University, USA "An excellent timely must read and must-have reference book for anybody interested or engaged in applying stable isotope signatures to questions in e.g. Anthropology, Biogeochemistry, Ecology, or Forensic Science regarding chronological and spatial movement, changes, or distribution relating to animals, humans, plants, or water.", Wolfram Meier-Augenstein, Centre for Anatomy & Human Identification, University of Dundee, UK "Natural resources are being affected by global change, but exactly where, how, and at what pace? Isoscapes provide new and remarkably precise answers.", John Hayes, Woods Hole Oceanographic Institution, USA "This exciting volume is shaping a new landscape in environmental sciences that is utilizing the remarkable advances in isotope research to enhance and extend the capabilities of the field.", Dan Yakir, Weizmann Institute of Science, Israel

POLAR NIGHT Marine Ecology

Author : Jørgen Berge
Publisher : Springer Nature
ISBN 13 : 303033208X
Total Pages : 380 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis POLAR NIGHT Marine Ecology by : Jørgen Berge

Download or read book POLAR NIGHT Marine Ecology written by Jørgen Berge and published by Springer Nature. This book was released on 2020-04-08 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Until recently, the prevailing view of marine life at high latitudes has been that organisms enter a general resting state during the dark Polar Night and that the system only awakens with the return of the sun. Recent research, however, with coordinated, multidisciplinary field campaigns based on the high Arctic Archipelago of Svalbard, have provided a radical new perspective. Instead of a system in dormancy, a new perspective of a system in full operation and with high levels of activity across all major phyla is emerging. Examples of such activities and processes include: Active marine organisms at sea surface, water column and the sea-floor. At surface we find active foraging in seabirds and fish, in the water column we find a high biodiversity and activity of zooplankton and larvae such as active light induced synchronized diurnal vertical migration, and at seafloor there is a high biodiversity in benthic animals and macroalgae. The Polar Night is a period for reproduction in many benthic and pelagic taxa, mass occurrence of ghost shrimps (Caprellides), high abundance of Ctenophores, physiological evidence of micro- and macroalgal cells that are ready to utilize the first rays of light when they appear, deep water fishes found at water surface in the Polar night, and continuous growth of bivalves throughout the winter. These findings not only begin to shape a new paradigm for marine winter ecology in the high Arctic, but also provide conclusive evidence for a top-down controlled system in which primary production levels are close to zero. In an era of environmental change that is accelerated at high latitudes, we believe that this new insight is likely to strongly impact how the scientific community views the high latitude marine ecosystem. Despite the overwhelming darkness, the main environmental variable affecting marine organisms in the Polar Night is in fact light. The light regime during the Polar Night is unique with respect to light intensity, spectral composition of light and photoperiod.

The Pacific Arctic Region

Author : Jacqueline M. Grebmeier
Publisher : Springer
ISBN 13 : 9401788634
Total Pages : 461 pages
Book Rating : 4.4/5 (17 download)

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Book Synopsis The Pacific Arctic Region by : Jacqueline M. Grebmeier

Download or read book The Pacific Arctic Region written by Jacqueline M. Grebmeier and published by Springer. This book was released on 2014-06-10 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pacific Arctic region is experiencing rapid sea ice retreat, seawater warming, ocean acidification and biological response. Physical and biogeochemical modeling indicates the potential for step-function changes to the overall marine ecosystem. This synthesis book was coordinated within the Pacific Arctic Group, a network of international partners working in the Pacific Arctic. Chapter topics range from atmospheric and physical sciences to chemical processing and biological response to changing environmental conditions. Physical and biogeochemical modeling results highlight the need for data collection and interdisciplinary modeling activities to track and forecast the changing ecosystem of the Pacific Arctic with climate change.

Molecular Microbial Ecology

Author : Mark Osborn
Publisher : Taylor & Francis
ISBN 13 : 1135320411
Total Pages : 370 pages
Book Rating : 4.1/5 (353 download)

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Book Synopsis Molecular Microbial Ecology by : Mark Osborn

Download or read book Molecular Microbial Ecology written by Mark Osborn and published by Taylor & Francis. This book was released on 2004-06-02 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microoganisms are distributed across every ecosystem, and microbial transformations are fundamental to the operation of the biosphere. Microbial ecology is the study of this interaction between microorganisms and their environment, and arguably represents one of the most important areas of biological research. Yet for many years our study of microbial flora was severely limited: the primary method of culturing microorganisms on media allowed us to study only between 0.1 and 10% of the total microbial flora in any given environment. Molecular Microbial Ecology gives a comprehensive guide to the recent revolution in the study of microorganisms in the environment. Details are given on molecular methods for isolating some of the previously uncultured and numerically dominant microbial groups. PCR-based approaches to studying prokaryotic systematics are described, including ribosomal RNA analysis and stable isotope probing. Later chapters cover DNA hybridisation techniques (including fluorescent in situ hybridisation), as well as genomic and metagenomic approaches to microbial ecology. Gathering together some of the world’s leading experts, this book provides an invaluable introduction to the modern theory and molecular methods used in studying microbial ecology.

Environment of the Cape Thompson Region, Alaska

Author : United States. Committee on Environmental Studies for Project Chariot
Publisher :
ISBN 13 :
Total Pages : 1250 pages
Book Rating : 4.:/5 (66 download)

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Book Synopsis Environment of the Cape Thompson Region, Alaska by : United States. Committee on Environmental Studies for Project Chariot

Download or read book Environment of the Cape Thompson Region, Alaska written by United States. Committee on Environmental Studies for Project Chariot and published by . This book was released on 1966 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scenarios and Responses to Future Deep Oil Spills

Author : Steven A. Murawski
Publisher : Springer
ISBN 13 : 3030129632
Total Pages : 542 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Scenarios and Responses to Future Deep Oil Spills by : Steven A. Murawski

Download or read book Scenarios and Responses to Future Deep Oil Spills written by Steven A. Murawski and published by Springer. This book was released on 2019-07-04 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has often been said that generals prepare for the next war by re-fighting the last. The Deepwater Horizon (DWH) oil spill was unlike any previous – an underwater well blowout 1,500 meters deep. Much has been learned in the wake of DWH and these lessons should in turn be applied to both similar oil spill scenarios and those arising from “frontier” explorations by the marine oil industry. The next deep oil well blowout may be at 3,000 meters or even deeper. This volume summarizes regional (Gulf of Mexico) and global megatrends in marine oil exploration and production. Research in a number of key areas including the behavior of oil and gas under extreme pressure, impacts on biological resources of the deep sea, and the fate of oil and gas released in spills is synthesized. A number of deep oil spills are simulated with detailed computer models, and the likely effects of the spills and potential mitigation measures used to combat them are compared. Recommended changes in policies governing marine oil exploration and development are proposed, as well as additional research to close critical and emerging knowledge gaps. This volume synthesizes state-of-the-art research in deep oil spill behavior and response. It is thus relevant for government and industry oil spill responders, policy formulators and implementers, and academics and students desiring an in-depth and balanced overview of key issues and uncertainties surrounding the quest for deep oil and potential impacts on the environment.

Influence of Climate Change on the Changing Arctic and Sub-Arctic Conditions

Author : Jacques Nihoul
Publisher : Springer
ISBN 13 : 1402094604
Total Pages : 236 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Influence of Climate Change on the Changing Arctic and Sub-Arctic Conditions by : Jacques Nihoul

Download or read book Influence of Climate Change on the Changing Arctic and Sub-Arctic Conditions written by Jacques Nihoul and published by Springer. This book was released on 2009-01-25 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current warming trends in the Arctic may shove the Arctic system into a seasonally ice-free state not seen for more than one million years. The melting is accelerating, and researchers were unable to identify natural processes that might slow the deicing of the Arctic. Such substantial additional melting of Arctic and Antarctic glaciers and ice sheets would raise the sea level worldwide, flooding the coastal areas where many of the world's population lives. Studies, led by scientists at the National Center for Atmospheric Research (NCAR) and the University of Arizona, show that greenhouse gas increases over the next century could warm the Arctic by 3-5°C in summertime. Thus, Arctic summers by 2100 may be as warm as they were nearly 130,000 years ago, when sea levels eventually rose up to 6 m higher than today.