Biogeochemical processes of micro/trace elements and their impacts on marine ecosystems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Biogeochemical processes of micro/trace elements and their impacts on marine ecosystems write by Wen Zhuang. This book was released on 2024-01-02. Biogeochemical processes of micro/trace elements and their impacts on marine ecosystems available in PDF, EPUB and Kindle.
Marine Biogeochemical Cycles
Marine Biogeochemical Cycles - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Marine Biogeochemical Cycles write by Rachael James. This book was released on 2005. Marine Biogeochemical Cycles available in PDF, EPUB and Kindle. 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
Trace Metals in Estuarine and Coastal Waters
Trace Metals in Estuarine and Coastal Waters - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Trace Metals in Estuarine and Coastal Waters write by Camille Gaulier. This book was released on 2020. Trace Metals in Estuarine and Coastal Waters available in PDF, EPUB and Kindle. Estuarine and coastal ecosystems provide multiple ecological, social and economic services. They are a source of food, income and are at the heart of marine trade, merchant shipping and sea transport. They therefore play a key role in our modern world and their conservation from an environmental point of view is today critical. Despite all the efforts done in environmental management, pollution associated with the rapid coastal development and intensive industrialization was inevitable and still remains one of the main threats towards marine ecosystems today. Specifically, trace metal contamination is of specific concern as coastal areas are generally prone to accumulate them. Most trace metals exhibit a dual role in marine waters: they act as nutrients in low concentrations, yet rapidly have toxic effects in higher concentration ranges. Continuous monitoring of their concentrations in estuarine and coastal ecosystems is therefore needed to better understand their biogeochemical behavior in such marine environments. However, limited knowledge exists on their bioavailability towards marine organisms: especially as the toxicity of these metals is not only related to their concentration but also strongly linked with their speciation which shows both seasonal and spatial variations. Thus, the main objective of this PhD research was to investigate the biogeochemical cycles of various trace metals and unravel their speciation and bioavailability in various aquatic systems: from very dynamic mixing zones of the Scheldt estuary to coastal harbors and shallow seawaters of the North Sea, and even to deeper and anoxic regions of the Baltic Sea. Trace metal concentrations and speciation were explored seasonally and spatially along horizontal and vertical gradients, and a comparison of classic active samplings of dissolved trace metals with a passive sampling technique (Diffusive Gradients in Thin-films; DGT) was carried out. The DGT technique was successfully used for the in-situ measurement of labile metals and eventually constitutes a good surrogate to the biomonitoring of trace elements (e.g. use of mussels, algae, etc.). This method offsets the lack of knowledge in terms of water quality monitoring and the results challenge the classic criteria which are used by international regulatory requirements (e.g. WFD, MSFD) and local commitments (e.g. OSPAR, HELCOM). Indeed, new criteria based on labile metal species instead of total dissolved species should be considered in the future. Such approach of trace metal speciation and assessment in aquatic systems could surely lead to a more integrated environmental management and improve our knowledge on anthropogenic impacts and pollutant fluxes. Moreover, it is eventually the main key to explain and predict bioavailability and potential toxicity of trace metals to the marine fauna and flora. This work therefore invites you to dive into a journey along our coasts, from urbanized areas to wild open seas, from their surface to their deepest waters.
Marine Microbiome and Biogeochemical Cycles in Marine Productive Areas
Marine Microbiome and Biogeochemical Cycles in Marine Productive Areas - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Marine Microbiome and Biogeochemical Cycles in Marine Productive Areas write by Alejandro A. Murillo. This book was released on 2020-01-16. Marine Microbiome and Biogeochemical Cycles in Marine Productive Areas available in PDF, EPUB and Kindle.
Biogeochemistry of Marine Dissolved Organic Matter
Biogeochemistry of Marine Dissolved Organic Matter - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Biogeochemistry of Marine Dissolved Organic Matter write by Dennis A. Hansell. This book was released on 2014-10-02. Biogeochemistry of Marine Dissolved Organic Matter available in PDF, EPUB and Kindle. Marine dissolved organic matter (DOM) is a complex mixture of molecules found throughout the world's oceans. It plays a key role in the export, distribution, and sequestration of carbon in the oceanic water column, posited to be a source of atmospheric climate regulation. Biogeochemistry of Marine Dissolved Organic Matter, Second Edition, focuses on the chemical constituents of DOM and its biogeochemical, biological, and ecological significance in the global ocean, and provides a single, unique source for the references, information, and informed judgments of the community of marine biogeochemists. Presented by some of the world's leading scientists, this revised edition reports on the major advances in this area and includes new chapters covering the role of DOM in ancient ocean carbon cycles, the long term stability of marine DOM, the biophysical dynamics of DOM, fluvial DOM qualities and fate, and the Mediterranean Sea. Biogeochemistry of Marine Dissolved Organic Matter, Second Edition, is an extremely useful resource that helps people interested in the largest pool of active carbon on the planet (DOC) get a firm grounding on the general paradigms and many of the relevant references on this topic. Features up-to-date knowledge of DOM, including five new chapters The only published work to synthesize recent research on dissolved organic carbon in the Mediterranean Sea Includes chapters that address inputs from freshwater terrestrial DOM
