Download or read book Spatial and Temporal Dynamics of Biogeochemical Processes in the Fraser River Canada written by Britta Marie Voss and published by . This book was released on 2014 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The great geologic and climatic diversity of the Fraser River basin in southwestern Canada render it an excellent location for understanding biogeochemical cycling of sediments and terrigenous organic carbon in a relatively pristine, large, temperate watershed. Sediments delivered by all tributaries have the potential to reach the ocean due to a lack of main stem lakes or impoundments, a unique feature for a river of its size. This study documents the concentrations of a suite of dissolved and particulate organic and inorganic constituents, which elucidate spatial and temporal variations in chemical weathering (including carbonate weathering in certain areas) as well as organic carbon mobilization, export, and biogeochemical transformation. Radiogenic strontium isotopes are employed as a tracer of sediment provenance based on the wide variation in bedrock age and lithology in the Fraser basin. The influence of sediments derived from the headwaters is detectable at the river mouth, however more downstream sediment sources predominate, particularly during high discharge conditions. Bulk radiocarbon analyses are used to quantify terrestrial storage timescales of organic carbon and distinguish between petrogenic and biospheric organic carbon, which is critical to assessing the role of rivers in long-term atmospheric CO2 consumption. The estimated terrestrial residence time of biospheric organic carbon in the Fraser basin is 650 years, which is relatively short compared to other larger rivers (Amazon, Ganges-Brahmaputra) in which this assessment has been performed, and is likely related to the limited floodplain storage capacity and non-steady-state post-glacial erosion state of the Fraser River. A large portion of the dissolved inorganic carbon load of the Fraser River (>80%) is estimated to derive from remineralization of dissolved organic carbon, particularly during the annual spring freshet when organic carbon concentrations increase rapidly. This thesis establishes a baseline for carbon cycling in a largely unperturbed modern mid-latitude river system and establishes a framework for future process studies on the mechanisms of organic carbon turnover and organic matter-mineral associations in river systems.
Download or read book Biogeochemical Dynamics at Major River Coastal Interfaces written by Thomas Bianchi and published by Cambridge University Press. This book was released on 2014 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art synthesis of biogeochemical dynamics and the impact of human alterations at major river-coastal interfaces for advanced students and researchers.
Download or read book Dynamics and Biogeochemistry of River Corridors and Wetlands written by A. Louise Heathwaite and published by . This book was released on 2005 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temporal and Spatial Scaling of Coupled Hydrological and Biogeochemical Processes in River Basins written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Geomorphology in River Biogeochemical Processing written by Elise LeNoir Chapman and published by . This book was released on 2014 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although once treated as simple downstream transporters of material, river networks are now recognized for their role in processing, or transformation, storage, and removal, of carbon and nutrients during transport. The linkages between channel geomorphic structure, biogeochemistry, and ecology of lotic ecosystems are important to their functioning. The overarching goal of this research was to develop a better understanding of the relationships among geomorphology, ecosystem metabolism, and carbon and nutrient dynamics in a larger river. This research exploited natural changes in river form associated with broad-scale geologic transitions in the Cahaba River, AL. Spatial and temporal patterns of ecosystem metabolism along the Cahaba indicated an important effect of regional geology. In the Coastal Plain this effect was expressed through strong seasonal changes in plankton productivity, driving high rates of gross primary production and ecosystem respiration. Anthropogenic activity associated with Birmingham, AL, causes elevated water-column nutrient concentrations. However, downstream nutrient levels are comparable to upstream of Birmingham. Corresponding to the location of this decline is a broad geomorphic transition creating shoal habitat, which supports expansive crops of macrophytes. We found whole ecosystem metabolism, and the biomass of macrophytes, could significantly contribute to water column nutrient declines. Recent models of organic matter export from rivers have identified the potential significance of seasonal pulses of autochthonous production and the dearth of knowledge regarding the fate of riverine algal production. Our evaluation of phytoplankton production, in the Coastal Plain, confirmed an important role in fueling water column processing and provided evidence of phytoplankton delivery to sediments. The identity and characteristics of primary producers appears to be constrained by broad geomorphologic transitions and has widespread ecological consequences including altering the timing and character of nutrient and carbon delivery downstream and the spatially and temporally dynamic nature of the relative importance of water-column and benthic processes. Overall, this research contributes to our understanding of river biogeochemistry by highlighting the complexity and variability of interactions among factors influencing rates of carbon and nutrient processing. Expanding the spatial and temporal scales of empirical measurements of ecosystem processes is critical to accurately predicting the biogeochemical activity of river networks.
Download or read book Aquatic Organic Matter Fluorescence written by Paula G. Coble and published by Cambridge University Press. This book was released on 2014-07-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A core text on principles, laboratory/field methodologies, and data interpretation for fluorescence applications in aquatic science, for advanced students and researchers.
Download or read book Estuarine Ecology written by Byron C. Crump and published by John Wiley & Sons. This book was released on 2022-10-07 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estuarine Ecology A detailed and accessible exploration of the fundamentals and the latest advances in estuarine ecology In the newly revised third edition of Estuarine Ecology, a team of distinguished ecologists presents the current knowledge in estuarine ecology with particular emphasis on recent trends and advances. The book is accessible to undergraduate students while also providing a welcome summary of up-to-date content for a more advanced readership. This latest edition is optimized for classroom use, with a more intuitive mode of presentation that takes into account feedback from the previous edition’s readers. Review questions and exercises have been added to assist in the learning and retention of complex concepts. Estuarine Ecology remains the gold standard for the discipline by taking stock of the manifold scientific breakthroughs made in the field since the last edition was written. It also offers: Thorough introductions to estuarine geomorphology, circulation, and chemistry In-depth treatments of estuarine primary and secondary production, including coastal marshes and mangrove wetlands A holistic view of estuarine ecosystems, their modeling and analysis, as well as the impact of human activities and climate change A companion website with detailed answers to exercise questions Perfect for students of estuarine ecology, environmental science, fisheries science, oceanography, and natural resource management, Estuarine Ecology will also earn a place in the libraries of professionals, government employees, and consultants working on estuary and wetlands management and conservation.
Download or read book Oceanic Abstracts written by and published by . This book was released on 1996 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1992 with total page 1198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanic Abstracts with Indexes written by and published by . This book was released on 1985 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Climate Change 2001 Impacts Adaptation and Vulnerability written by Intergovernmental Panel on Climate Change. Working Group II. and published by Cambridge University Press. This book was released on 2001-07-02 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some issues addressed in this Working Group III volume are mitigation of greenhouse gas emissions, managing biological carbon reservoirs, geo-engineering, costing methods, and decision-making frameworks.
Download or read book Ecology Abstracts written by and published by . This book was released on 1996 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Download or read book Critical Zones written by Bruno Latour and published by MIT Press. This book was released on 2020-10-13 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Artists and writers portray the disorientation of a world facing climate change. This monumental volume, drawn from a 2020 exhibition at the ZKM Center for Art and Media, portrays the disorientation of life in world facing climate change. It traces this disorientation to the disconnection between two different definitions of the land on which modernizing humans live: the sovereign nation from which they derive their rights, and another one, hidden, from which they gain their wealth—the land they live on, and the land they live from. Charting the land they will inhabit, they find not a globe, not the iconic “blue marble,” but a series of critical zones—patchy, heterogenous, discontinuous. With short pieces, longer essays, and more than 500 illustrations, the contributors explore the new landscape on which it may be possible for humans to land—what it means to be “on Earth,” whether the critical zone, the Gaia, or the terrestrial. They consider geopolitical conflicts and tools redesigned for the new “geopolitics of life forms.” The “thought exhibition” described in this book can opens a fictional space to explore the new climate regime; the rest of the story is unknown. Contributors include Dipesh Chakrabarty, Pierre Charbonnier, Emanuele Coccia, Vinciane Despret, Jerôme Gaillarde, Donna Haraway, Joseph Leo Koerner, Timothy Lenton, Richard Powers, Simon Schaffer, Isabelle Stengers, Bronislaw Szerszynski, Jan A. Zalasiewicz, Siegfried Zielinski Copublished with ZKM | Center for Art and Media Karlsruhe
Download or read book Environmental Toxicology and Chemistry written by and published by . This book was released on 2001 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide to Geography Programs in North America written by and published by . This book was released on 2003 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wetland Carbon and Environmental Management written by Ken W. Krauss and published by John Wiley & Sons. This book was released on 2021-11-23 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores how the management of wetlands can influence carbon storage and fluxes. Wetlands are vital natural assets, including their ability to take-up atmospheric carbon and restrict subsequent carbon loss to facilitate long-term storage. They can be deliberately managed to provide a natural solution to mitigate climate change, as well as to help offset direct losses of wetlands from various land-use changes and natural drivers. Wetland Carbon and Environmental Management presents a collection of wetland research studies from around the world to demonstrate how environmental management can improve carbon sequestration while enhancing wetland health and function. Volume highlights include: Overview of carbon storage in the landscape Introduction to wetland management practices Comparisons of natural, managed, and converted wetlands Impact of wetland management on carbon storage or loss Techniques for scientific assessment of wetland carbon processes Case studies covering tropical, coastal, inland, and northern wetlands Primer for carbon offset trading programs and how wetlands might contribute The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity.Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.
Download or read book Thriving on Our Changing Planet written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-01-20 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live on a dynamic Earth shaped by both natural processes and the impacts of humans on their environment. It is in our collective interest to observe and understand our planet, and to predict future behavior to the extent possible, in order to effectively manage resources, successfully respond to threats from natural and human-induced environmental change, and capitalize on the opportunities â€" social, economic, security, and more â€" that such knowledge can bring. By continuously monitoring and exploring Earth, developing a deep understanding of its evolving behavior, and characterizing the processes that shape and reshape the environment in which we live, we not only advance knowledge and basic discovery about our planet, but we further develop the foundation upon which benefits to society are built. Thriving on Our Changing Planet presents prioritized science, applications, and observations, along with related strategic and programmatic guidance, to support the U.S. civil space Earth observation program over the coming decade.
