Characterizing Phosphorus Dynamics in Freshwater Streams Spanning Both Agricultural and Urban Gradients PDF Download
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Author: Angela Byrne Publisher: ISBN: Category : Eutrophication Languages : en Pages : 62
Book Description
Land use modifications have led to both the intensification of agricultural land and the urbanization that we have been seeing throughout New Zealand since colonization. These land use trends can significantly impact on freshwater stream ecology, with additional nutrients, contaminants and sediments often having degrading effects through loading and deposition. These factors can essentially lead to the streams becoming eutrophic, lacking oxygen and possessing increased aquatic growth. Monitoring these nutrient and sediment controls is vital for understanding stream processes and how these can be affected. This study reflects on nutrient concentrations, like phosphorus and nitrogen, which have shown levels of excess nutrients across many stream environments. Phosphorus will be more greatly covered, identifying nutrient fluxes with the water column and within the sediment, finding the point where phosphorus is neither adsorbed or desorbed, how the phosphorus is bound within sediments, and at what nutrient uptake capacity varying streams have leading to their saturation point of phosphorus. Keywords: nutrients loading, sediment deposition, freshwater streams, land use change, equilibrium point, phosphorus fractionation, uptake capacity
Author: Angela Byrne Publisher: ISBN: Category : Eutrophication Languages : en Pages : 62
Book Description
Land use modifications have led to both the intensification of agricultural land and the urbanization that we have been seeing throughout New Zealand since colonization. These land use trends can significantly impact on freshwater stream ecology, with additional nutrients, contaminants and sediments often having degrading effects through loading and deposition. These factors can essentially lead to the streams becoming eutrophic, lacking oxygen and possessing increased aquatic growth. Monitoring these nutrient and sediment controls is vital for understanding stream processes and how these can be affected. This study reflects on nutrient concentrations, like phosphorus and nitrogen, which have shown levels of excess nutrients across many stream environments. Phosphorus will be more greatly covered, identifying nutrient fluxes with the water column and within the sediment, finding the point where phosphorus is neither adsorbed or desorbed, how the phosphorus is bound within sediments, and at what nutrient uptake capacity varying streams have leading to their saturation point of phosphorus. Keywords: nutrients loading, sediment deposition, freshwater streams, land use change, equilibrium point, phosphorus fractionation, uptake capacity
Author: K. Ramesh Reddy Publisher: CRC Press ISBN: 0429531931 Category : Science Languages : en Pages : 926
Book Description
The globally important nature of wetland ecosystems has led to their increased protection and restoration as well as their use in engineered systems. Underpinning the beneficial functions of wetlands are a unique suite of physical, chemical, and biological processes that regulate elemental cycling in soils and the water column. This book provides an in-depth coverage of these wetland biogeochemical processes related to the cycling of macroelements including carbon, nitrogen, phosphorus, and sulfur, secondary and trace elements, and toxic organic compounds. In this synthesis, the authors combine more than 100 years of experience studying wetlands and biogeochemistry to look inside the black box of elemental transformations in wetland ecosystems. This new edition is updated throughout to include more topics and provide an integrated view of the coupled nature of biogeochemical cycles in wetland systems. The influence of the elemental cycles is discussed at a range of scales in the context of environmental change including climate, sea level rise, and water quality. Frequent examples of key methods and major case studies are also included to help the reader extend the basic theories for application in their own system. Some of the major topics discussed are: Flooded soil and sediment characteristics Aerobic-anaerobic interfaces Redox chemistry in flooded soil and sediment systems Anaerobic microbial metabolism Plant adaptations to reducing conditions Regulators of organic matter decomposition and accretion Major nutrient sources and sinks Greenhouse gas production and emission Elemental flux processes Remediation of contaminated soils and sediments Coupled C-N-P-S processes Consequences of environmental change in wetlands# The book provides the foundation for a basic understanding of key biogeochemical processes and its applications to solve real world problems. It is detailed, but also assists the reader with box inserts, artfully designed diagrams, and summary tables all supported by numerous current references. This book is an excellent resource for senior undergraduates and graduate students studying ecosystem biogeochemistry with a focus in wetlands and aquatic systems.
Author: National Research Council Publisher: National Academies Press ISBN: 9780309045346 Category : Technology & Engineering Languages : en Pages : 580
Book Description
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.
Author: National Research Council Publisher: National Academies Press ISBN: 0309125391 Category : Nature Languages : en Pages : 611
Book Description
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.
Author: Geneviève M. Carr Publisher: UNEP/Earthprint ISBN: 9789295039513 Category : Business & Economics Languages : en Pages : 132
Book Description
This document is intended to provide an overview of the major components of surface and ground water quality and how these relate to ecosystem and human health. Local, regional and global assessments of water quality monitoring data are used to illustrate key features of aquatic environments, and to demonstrate how human activities on the landscape can influence water quality in both positive and negative ways. Clear and concise background knowledge on water quality can serve to support other water assessments.
Author: National Research Council Publisher: National Academies Press ISBN: 0309082951 Category : Science Languages : en Pages : 449
Book Description
The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
Author: Angela Byrne
Author: Angela Byrne
Author: James F. Coles
Author: 
Author: Vijay P. Singh
Author: Earl Shaver
Author: K. Ramesh Reddy
Author: National Research Council
Author: National Research Council
Author: Geneviève M. Carr
Author: National Research Council