Download or read book An Exploratory Study of the Terrestrial Biogeochemical Silicon Cycle at a Forested Watershed in Northern Vermont written by Christopher John Garvin and published by . This book was released on 2006 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biogeochemical Cycle of Silicon in the Ocean written by Bernard Quéguiner and published by John Wiley & Sons. This book was released on 2016-06-16 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the biogeochemical dynamics of marine ecosystems, silicon is a major element whose role has, for a long time, been underestimated. It is however indispensable to the activity of several biomineralizing marine organisms, some of which play an essential role in the biological pump of oceanic carbon. This book presents notions indispensable to the knowledge on the silicon biogeochemical cycle in ocean systems, first of all describing the main quantitative analysis techniques and examination of the major organisms involved in the cycle. The author then moves on to study the most up-to-date processes to control the use of silicon and its regeneration in natural conditions, before mentioning the central role played by this original element in the control of all the biogeochemical cycles in the global ocean. The available information finally enables the global biogeochemical budget of silicon in the marine environment to be quantified.
Download or read book Analysis of Biogeochemical Cycling Processes in Walker Branch Watershed written by Dale W Johnson and published by . This book was released on 1988-12-01 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Observations on the Biogeochemical Cycle of Silica in Stockbridge Bowl Lake written by Stuart D. Ludlam and published by . This book was released on 1974 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Species Diversity and Functionality on Soil Biogenic Silicon written by Yutong Jiang and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Silicon (Si) has many beneficial effects on plants. Its cycling in terrestrial ecosystems plays a vital role in the global biogeochemical cycle. Temperate tree species differ greatly in their capacity to accumulate Si, but the implications for such variations for soil biogenic silica (BSi) concentration remains poorly understood. This study aims to (i) explain the effect of tree species on soil BSi by assessing leaf and soil BSi in 19 temperate tree species; (ii) study the effects of species and functional diversity on leaf and soil BSi; and (iii) link leaf Si to plant functional traits. The study was conducted at the International Diversity Experiment Network with Trees (IDENT) plantation in Sainte-Anne-de-Bellevue, QC. The plantation included 19 monocultures and 35 mixed plots replicated in four blocks. Soils were sampled in May of 2019, and leaves in August of 2019. Leaf Si and nutrients (N, P, K, Ca, Mg and Mn), and soil BSi and soil parameters (pH and Mehlich P, K, Ca, Mg and Mn) were assessed. Soil BSi and leaf Si were extracted with NaOH, and determined by spectrophotometry. For hardwoods, soil BSi concentration was higher under Si accumulating species (i.e., maples) and lower under Si excluders (i.e., yellow birch), and increased with the proportion of maples in the plots. The opposite trend was observed for conifer species. Soil BSi concentration was significantly correlated with soil potassium (K) and phosphorous (P). However, species richness and functional diversity were not correlated with soil BSi concentration. Leaf Si concentration was consistently high in shade-tolerant species and was negatively correlated with litter carbon and growth rate, suggesting a beneficial role of Si in shade tolerant trees. Overall, this study emphasizes the importance of tree species and some soil parameters for controlling soil BSi concentration and therefore Si cycle in temperate forests. The large variability of Si concentrations in soil and leaves and their relation to soil nutrients and plant traits suggest that Si plays an important role in a variety of ecological processes in forest ecosystems"--
Download or read book Cycling of Carbon Nitrogen Sulfur and Phosphorus in Terrestrial and Aquatic Ecosystems written by J. R. Freney and published by Springer. This book was released on 2011-11-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing stress is being placed on the environment by man's activities including those of changing land usage for increased food production and the release of carbon dioxide due to fossil fuel combustion. Further stresses may occur if agricultural practice is modified by using plant products for liquid fuels. Rational management of these activities can only occur if there is a thorough under standing of the biogeochemical cycles of the major plant nutrients, carbon, nitrogen, sulfur and phosphorus. A vital part of this understanding concerns the interactions between these cycles, where in various limiting processes the cycle of one element exerts a controlling influence over the cycle of one or more of the other elements. A well known example of this interaction is the role of sulfur, nitrogen and phosphorus as limiting factors in plant growth i.e. carbon uptake by the biosphere. A related effect is the suggested increase in nitrogen fixation by legumes due to CO2 enrichment in the atmosphere. Other interactions occur during the mineralisation of nitrogen, sulfur and phosphorus associated with the release of organic carbon during the decay of plant material and between the carbon substrate and mineral forms of nitrogen and sulfur during denitrification and bacterial sulfate reduction. Increased sulfur dioxide and nitrogen oxide emissions to the atmosphere in some areas are causing acid rain which appears to be affecting the productivity of some land and aquatic ecosystems.
Download or read book The role of terrestrial vegetation in the global carbon cycle written by George M. Woodwell and published by . This book was released on 1989 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tracing Human Imprints on the Terrestrial Silica Cycle written by Floor Vandevenne and published by . This book was released on 2015 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precipitation Partitioning by Vegetation written by John T. Van Stan, II and published by Springer Nature. This book was released on 2020-01-01 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents research on precipitation partitioning processes in vegetated ecosystems, putting them into a global context. It describes the processes by which meteoric water comes into contact with the vegetation's canopy, typically the first surface contact of precipitation on land. It also discusses how precipitation partitioning by vegetation impacts the amount, patterning, and chemistry of water reaching the surface, as well as the amount and timing of evaporative return to the atmosphere. Although this process has been extensively studied, this is the first review of the global literature on the partitioning of precipitation by forests, shrubs, crops, grasslands and other less-studies plant types. The authors offer global contextualization combined with a detailed discussion of the impacts for the climate and terrestrial ecohydrological systems. As such, this comprehensive overview is a valuable reference tool for a wide range of specialists and students in the fields of geoscience and the environment.
Download or read book Drinking Water from Forests and Grasslands written by and published by . This book was released on 2000 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phytoliths written by Dolores R. Piperno and published by Rowman Altamira. This book was released on 2006-01-30 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of phytoliths—inorganic silica remnants plants leave behind when they die and decay—has developed dramatically over the last twenty years. New publications have documented a diverse array of phytoliths from many regions around the globe, while new understandings have emerged as to how and why plants produce phytoliths. Together, these developments make phytoliths a powerful tool in reconstructing past environments and human uses of plants. In Phytoliths, Dolores Piperno makes sense of the discipline for both those working directly with phytoliths in the field or the lab as well as for those who rely on the results of phytolith studies for their own research. Including over a hundred images, Piperno's book will be of great benefit to archaeologists and paleobotanists in the classroom or the lab.
Download or read book Biochar for Environmental Management written by Dr. Johannes Lehmann and published by Earthscan. This book was released on 2009 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Biochar is the carbon-rich product when biomass (such as wood, manure, or crop residues) is heated in a closed container with little or no available air. It can be used to improve agriculture and the environment in several ways, and its stability in soil and superior nutrient-retention properties make it an ideal soil amendment to increase crop yields. In addition to this, biochar sequestration, in combination with sustainable biomass production, can be carbon-negative and therefore used to actively remove carbon dioxide from the atmosphere, with major implications for mitigation of climate change. Biochar production can also be combined with bioenergy production through the use of the gases that are given off in the pyrolysis process.This book is the first to synthesize the expanding research literature on this topic. The book's interdisciplinary approach, which covers engineering, environmental sciences, agricultural sciences, economics and policy, is a vital tool at this stage of biochar technology development. This comprehensive overview of current knowledge will be of interest to advanced students, researchers and professionals in a wide range of disciplines"--Provided by publisher.
Download or read book Urban Stormwater Management in the United States written by National Research Council and published by National Academies Press. This book was released on 2009-03-17 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.
Download or read book Successes Limitations and Frontiers in Ecosystem Science written by Michael L. Pace and published by Springer Science & Business Media. This book was released on 2013-12-01 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecosystem research has emerged in recent decades as a vital, successful, and sometimes controversial approach to environmental science. This book emphasizes the idea that much of the progress in ecosystem research has been driven by the emergence of new environmental problems that could not be addressed by existing approaches. By focusing on successes and limitations of ecosystems studies, the book explores avenues for future ecosystem-level research.
Download or read book Stream Corridor Restoration written by and published by National Technical Info Svc. This book was released on 1998 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is a cooperative effort among fifteen Federal agencies and partners to produce a common reference on stream corridor restoration. It responds to a growing national and international interest in restoring stream corridors.
Download or read book Restoration of Aquatic Ecosystems written by National Research Council and published by National Academies Press. This book was released on 1992-01-01 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
Download or read book Hydrogeophysics written by Yorum Rubin and published by Springer Science & Business Media. This book was released on 2006-05-06 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: This ground-breaking work is the first to cover the fundamentals of hydrogeophysics from both the hydrogeological and geophysical perspectives. Authored by leading experts and expert groups, the book starts out by explaining the fundamentals of hydrological characterization, with focus on hydrological data acquisition and measurement analysis as well as geostatistical approaches. The fundamentals of geophysical characterization are then at length, including the geophysical techniques that are often used for hydrogeological characterization. Unlike other books, the geophysical methods and petrophysical discussions presented here emphasize the theory, assumptions, approaches, and interpretations that are particularly important for hydrogeological applications. A series of hydrogeophysical case studies illustrate hydrogeophysical approaches for mapping hydrological units, estimation of hydrogeological parameters, and monitoring of hydrogeological processes. Finally, the book concludes with hydrogeophysical frontiers, i.e. on emerging technologies and stochastic hydrogeophysical inversion approaches.
