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Pelagic Nutrient Cycles
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Book Synopsis Pelagic Nutrient Cycles by : Tom Andersen
Download or read book Pelagic Nutrient Cycles written by Tom Andersen and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of the interactions between pelagic food web processes and element cycling in lakes. While some findings are examined in terms of classical concepts from the ecological theory of predator-prey systems, special emphasis is placed on exploring how stoichiometric relationships between primary producers and herbivores influence the stability and persistence of planktonic food webs. The author develops simple dynamic models of the cycling of mineral nutrients through plankton algae and grazers, and then goes on to explore them both analytically and numerically. The results thus obtained are of great interest to both theoretical and experimental ecologists. Moreover, the models themselves are of immense practical use in the area of lake management.
Book Synopsis Factors Governing Sedimentation and Pelagic Nutrient Cycles in the Northern Baltic Sea by : Anna-Stiina Heiskanen
Download or read book Factors Governing Sedimentation and Pelagic Nutrient Cycles in the Northern Baltic Sea written by Anna-Stiina Heiskanen and published by . This book was released on 1998 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Crustacean Zooplankton in Pelagic Nutrient Cycling by : Tobias Vrede
Download or read book The Role of Crustacean Zooplankton in Pelagic Nutrient Cycling written by Tobias Vrede and published by . This book was released on 1998 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nutrient cycling in pelagic systems by : V. SMETACEK
Download or read book Nutrient cycling in pelagic systems written by V. SMETACEK and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Eutrophication in Planktonic Ecosystems: Food Web Dynamics and Elemental Cycling by : T. Tamminen
Download or read book Eutrophication in Planktonic Ecosystems: Food Web Dynamics and Elemental Cycling written by T. Tamminen and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PELAG 1996 Symposium Proceedings provides the reader with the latest advances in the study of planktonic cycling of matter and energy, placing a strong emphasis on the effects of eutrophication on these processes. This book covers a wide range of topics in the field, including: Nutrient limitation of phytoplankton growth Nutrient cycles in the planktonic food web DOM sources, composition, and uptake Resource limitation vs. shaping of the food web by grazing Spatio-temporal variability: coupling of physical and biological processes Processes controlling sinking losses from the pelagic system Planktonic food web modelling . The book should be of interest to everybody involved in planktonic ecosystem research, from the advanced student to the distinguished scientist. This volume brings to the reader the expertise of internationally renowned authors on the main issues of today's ecological plankton research.
Book Synopsis Eutrophication and the Baltic Sea by : Timo Tamminen
Download or read book Eutrophication and the Baltic Sea written by Timo Tamminen and published by . This book was released on 1990 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Marine Biogeochemical Cycles by : Rachael James
Download or read book Marine Biogeochemical Cycles written by Rachael James and published by Butterworth-Heinemann. This book was released on 2005 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Volume belongs to a series on Oceanography. It is designed so that it can be read on its own, or used as a supplement in oceanogrphy courses. After a brief introduction to sea-floor sediments, the book shows how the activities of marine organisms cycle nutrients and other dissolved constituents within the oceans, and influence the rates at which both solid and dissolved material is removed to sediments. It goes on to review the carbonate system and shows how sediments that come from continental areas may be transported to the deep sea, explores what sea-floor sediments have taught us about the history of the oceans, and describes the biological and chemical processes that continue long after sediments have been deposited on the deep sea-floor. * Covers the basics on the occurrence, distribution, and cycling of chemical elements in the ocean * Features full-color photographs and beautiful illustrations throughout * Reader-friendly layout, writing, and graphics * Pedagogy includes chapter summaries, chapter questions with answers and comments at the end of the book; highlighted key terms; and boxed topics and explanations * Can be used alone, as a supplement, or in combination with other Open University titles in oceanography
Book Synopsis Benthic-pelagic Oxygen and Nutrient Cycles in a Seasonally Hypoxic Coastal Basin by : Subhadeep Rakshit
Download or read book Benthic-pelagic Oxygen and Nutrient Cycles in a Seasonally Hypoxic Coastal Basin written by Subhadeep Rakshit and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biogeochemical cycling of nutrients and oxygen in the coastal ocean is of high importance given that anthropogenic nutrient inputs have doubled the preindustrial nutrient load to water bodies. In particular, excess nitrogen (N) causes eutrophication and hypoxia in the coastal ocean, which is further exacerbated by increased stratification due to global warming. Owing to relatively shallow waters in coastal regions, processes within the sediment and water column play equally important roles in key biogeochemical cycles. To understand the factors that regulate the nutrient and oxygen cycle in seasonally hypoxic coastal basins, this thesis employs high-resolution field observations conducted in Bedford Basin, coupled with numerical modeling, to investigate the impact of various geochemical, biological, and physical drivers. In Chapter 2, field observations of weekly CTD casts and measured benthic oxygen uptake were used to develop and parameterize a numerical model to understand the development of hypoxia in Bedford Basin and quantify different sources and sinks of oxygen in three contrasting years. Chapter 3 is focused on understanding the annual development of the nitrogen cycle based on weekly timeseries of geochemical parameters and phylogenetic marker genes in bottom waters over four consecutive years. Measured geochemical and biological parameters were incorporated into a box model to simulate the nitrification dynamics and identify the controlling factors. Through this approach, a novel mechanism of nitrification was identified whereby strong physical mixing dilutes the resident nitrifier biomass leading to delayed and decoupled nitrification. Weak physical mixing during winter may have the reverse effect. In Chapter 4, benthic biogeochemical processes were studied through seasonal measurements of organic matter remineralization rate, benthic fluxes, sediment geochemical profiles, along with reaction-transport modeling. Overall, this thesis studied the development of hypoxia in a coastal basin, nutrient cycles in the water column and sediment, and the physical and biological drivers of coupled biogeochemical cycles.
Book Synopsis Flows of Energy and Materials in Marine Ecosystems by : M. J. R. Fasham
Download or read book Flows of Energy and Materials in Marine Ecosystems written by M. J. R. Fasham and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impetus for the conference held at Bombannes, France in May, 1982 arose out of a Scientific Committee on Oceanic Research (SCOR) Working Group on "Mathematical Models in Biological Oceanography". This group was chaired by K.H. Mann and held two meetings in 1977 and 1979. At both meetings it was felt that, although reductionist modelling of marine ecosystems had achieved some successes, the future progress lay in the development of holistic ecosystem models. The members of the group (K.H. Mann, T. Platt, J.M. Colebrook, D.F. Smith, M.J.R. Fasham, J. Field, G. Radach, R.E. Ulanowicz and F. Wulff) produced a critical review of reductionist and holistic models which was published by the Unesco Press (Platt, Mann and Ulanowicz, 1981). One of the conclusions of this review was that, whether holistic or reductionist models are preferred, it is critically important to increase the scientific effort in the measurement of physiological rates for the computation of ecological fluxes. The Working Group therefore recommended that an international meeting should be organized which would attempt to bring together theoretical ecologists and biological oceanographers to assess the present and future capability for measuring ecological fluxes and incorporating these data into models. An approach was made to the Marine Sciences Panel of the NATO Science Committee who expressed an interest in funding such a meeting. They awarded a planning grant and a planning group was formed consisting of M.J.R. Fasham, M.V. Angel, T. Platt, R.E.
Download or read book Plankton Ecology written by Ulrich Sommer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: All relevant ecological aspects of plankton, especially seasonal changes in the species composition, the role of competition for limiting resources in species replacements, the role of parasitism, predation and competition in seasonal succession are treated in detail considering phytoplankton, zooplankton and bacteroplankton. In addition to its use as a valid reference book for plankton ecology, this monograph may well be used as a model for other kinds of ecological communities.
Book Synopsis Nitrogen in the Marine Environment by : Edward J. Carpenter
Download or read book Nitrogen in the Marine Environment written by Edward J. Carpenter and published by Elsevier. This book was released on 2013-10-22 with total page 919 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen in the Marine Environment provides information pertinent to the many aspects of the nitrogen cycle. This book presents the advances in ocean productivity research, with emphasis on the role of microbes in nitrogen transformations with excursions to higher trophic levels. Organized into 24 chapters, this book begins with an overview of the abundance and distribution of the various forms of nitrogen in a number of estuaries. This text then provides a comparison of the nitrogen cycling of various ecosystems within the marine environment. Other chapters consider chemical distributions and methodology as an aid to those entering the field. This book discusses as well the enzymology of the initial steps of inorganic nitrogen assimilation. The final chapter deals with the philosophy and application of modeling as an investigative method in basic research on nitrogen dynamics in coastal and open-ocean marine environments. This book is a valuable resource for plant biochemists, microbiologists, aquatic ecologists, and bacteriologists.
Download or read book Oxford Bibliographies written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Terrestrial Ecosystem Ecology by : F Stuart Chapin III
Download or read book Principles of Terrestrial Ecosystem Ecology written by F Stuart Chapin III and published by Springer Science & Business Media. This book was released on 2006-04-10 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Features review questions at the end of each chapter; Includes suggestions for recommended reading; Provides a glossary of ecological terms; Has a wide audience as a textbook for advanced undergraduate students, graduate students and as a reference for practicing scientists from a wide array of disciplines
Book Synopsis Clean Coastal Waters by : National Research Council
Download or read book Clean Coastal Waters written by National Research Council and published by National Academies Press. This book was released on 2000-08-17 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental problems in coastal ecosystems can sometimes be attributed to excess nutrients flowing from upstream watersheds into estuarine settings. This nutrient over-enrichment can result in toxic algal blooms, shellfish poisoning, coral reef destruction, and other harmful outcomes. All U.S. coasts show signs of nutrient over-enrichment, and scientists predict worsening problems in the years ahead. Clean Coastal Waters explains technical aspects of nutrient over-enrichment and proposes both immediate local action by coastal managers and a longer-term national strategy incorporating policy design, classification of affected sites, law and regulation, coordination, and communication. Highlighting the Gulf of Mexico's "Dead Zone," the Pfiesteria outbreak in a tributary of Chesapeake Bay, and other cases, the book explains how nutrients work in the environment, why nitrogen is important, how enrichment turns into over-enrichment, and why some environments are especially susceptible. Economic as well as ecological impacts are examined. In addressing abatement strategies, the committee discusses the importance of monitoring sites, developing useful models of over-enrichment, and setting water quality goals. The book also reviews voluntary programs, mandatory controls, tax incentives, and other policy options for reducing the flow of nutrients from agricultural operations and other sources.
Book Synopsis Impacts of Pelagic Fish on Organic Carbon Cycling as Recorded in Marine Sediments by : Lucas Kavanagh
Download or read book Impacts of Pelagic Fish on Organic Carbon Cycling as Recorded in Marine Sediments written by Lucas Kavanagh and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The field of biogeochemistry has established that life plays a key role in dictating the chemical regime of the world's oceans. Focus has been placed on primary producers and microbes but the role of upper trophic levels and overall ecosystem structure remains uncertain. In contrast, the link between fish stocks and lake eutrophication in fresh water ecology has been well established for decades and numerous observations demonstrate similar dynamics are possible in the marine environment. To gain a long-term perspective of natural fish fluctuations and marine biogeochemical dynamics,published high-resolution coastal sediment records were compiled and concentrations of fish scales, a proxy for pelagic fish abundance, were compared with total organic carbon, a proxy for export production. Despite the challenges of using sediment records and the potential convolution of ecological and climatic signals, statistically significantrelationships are observed at four out of eight sites. The strongest of these correlations are negative, an intriguing result as the opposite would be expected from bottom-up control of an ecosystem or a purely preservation related signal. These negative relationships could be due to upwelling-driven oxygen and nutrient dynamics or a result of pelagic fish stocks increasing the recycling of carbon in the upper ocean. Correlations are strongest with counts of scales belonging to specific species, rather than aggregates of all fish scales, implying that the trophic level of the fish is of key importance.The results point to an underexploited opportunity to quantify the relationships between marine fish populations and biogeochemical cycles on timescales that cannot be observed directly." --
Book Synopsis Sustainable Increase of Marine Harvesting: Fundamental Mechanisms and New Concepts by : Olav Vadstein
Download or read book Sustainable Increase of Marine Harvesting: Fundamental Mechanisms and New Concepts written by Olav Vadstein and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: "How can we increase the production and harvest of living marine resources in the new millennium? Bridging potentials and environmental constraints". This was the theme of the 1st Maricult Conference arranged in Trondheim, Norway in June 2000 in connection with termination of the Norwegian research programme Maricult (1996-2000; www.maricult.org). The intention for the conference was not only to present a state of the art overview of the research conducted as part of the programme, but also to describe other experiences and to discuss the ideas and the scientific status of the programme with the international scientific community. A total of 50 oral communications and 8 posters were presented at the conference. Sixteen of them are included in the present volume. They deal with such topics as strategies for improving marine harvest, underlying mechanisms for marine productivity, new concepts of mariculture with emphasize on mussels, and nutrient supply and environmental impact.
