Spatial Variation of Atmospheric Nitrogen Deposition and Critical Loads for Aquatic Ecosystems in the Greater Yellowstone Area
Author:
Publisher:
Published: 2017
Total Pages:
ISBN-13:
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Atmospheric Nitrogen Deposition to Global Forests
Author: Enzai Du
Publisher: Elsevier
Published: 2023-02-15
Total Pages: 304
ISBN-13: 0323911404
DOWNLOAD EBOOKAtmospheric Nitrogen Deposition in Global Forests: Spatial Variation, Impacts, and Management Implications provides the most updated and comprehensive knowledge on spatial variation and ecological impacts of reactive nitrogen deposition in global forests, as well as forest management options to mitigate the negative impacts. Written and edited by international experts in the field, this book synthesizes recent research developments and insights in monitoring and modeling of nitrogen deposition in global forests. It also assesses ecological impacts of enhanced nitrogen deposition on forest structure and function, and responses of forest ecosystems to decreasing nitrogen deposition in regions such as the European Union and North America. This book also reviews indicators and thresholds for nitrogen saturation in global forests and analyzes remediation options to reduce impacts of excess nitrogen deposition. Atmospheric Nitrogen Deposition in Global Forests: Spatial Variation, Impacts, and Management Implications is an important resource for researchers in forestry and biodiversity conservation, as well as graduate students, policymakers and others who want to understand environmental issues of reactive nitrogen deposition in global forests. Presents spatial variation of nitrogen deposition in forests at global scale Offers a systematic view of ecological impacts of enhanced nitrogen deposition Discusses responses of forest ecosystems r to decreasing nitrogen deposition Provides expert research and findings on forest management options to remediate negative impacts
Critical Nitrogen Deposition Loads in High-elevation Lakes of the Western US Inferred from Paleolimnological Records
Author: Jasmine E. Saros
Publisher:
Published: 2010
Total Pages: 10
ISBN-13:
DOWNLOAD EBOOKCritical loads of nitrogen (N) from atmospheric deposition were determined for alpine lake ecosystems in the western US using fossil diatom assemblages in lake sediment cores. Changes in diatom species over the last century were indicative of N enrichment in two areas, the eastern Sierra Nevada, starting between 1960 and 1965, and the Greater Yellowstone Ecosystem, starting in 1980. In contrast, no changes in diatom community structure were apparent in lakes of Glacier National Park. To determine critical N loads that elicited these community changes, we modeled wet nitrogen deposition rates for the period in which diatom shifts first occurred in each area using deposition data spanning from 1980 to 2007. We determined a critical load of 1.4 kg N ha-1 year-1 wet N deposition to elicit key nutrient enrichment effects on diatom communities in both the eastern Sierra Nevada and the Greater Yellowstone Ecosystem.
Air Pollution and Its Impacts on U.S. National Parks
Author: Timothy J. Sullivan
Publisher: CRC Press
Published: 2017-02-03
Total Pages: 565
ISBN-13: 1351671928
DOWNLOAD EBOOKA variety of air pollutants are emitted into the atmosphere from human-caused and natural emissions sources throughout the United States and elsewhere. These contaminants impact sensitive natural resources in wilderness, including the national parks. The system of national parks in the United States is among our greatest assets. This book provides a compilation and synthesis of current scientific understanding regarding the causes and effects of these pollutants within national park lands. It describes pollutant emissions, deposition, and exposures; it identifies the critical (tipping point) loads of pollutant deposition at which adverse impacts are manifested.
Atmospheric Nitrogen Deposition in the Western United States
Author: Sarah Marie Anderson
Publisher:
Published: 2017
Total Pages: 131
ISBN-13:
DOWNLOAD EBOOKAnthropogenic activities have greatly modified the way nitrogen moves through the atmosphere and terrestrial and aquatic environments. Excess reactive nitrogen generated through fossil fuel combustion, industrial fixation, and intensification of agriculture is not confined to anthropogenic systems but leaks into natural ecosystems with consequences including acidification, eutrophication, and biodiversity loss. A better understanding of where excess nitrogen originates and how that changes over time is crucial to identifying when, where, and to what degree environmental impacts occur. A major route into ecosystems for excess nitrogen is through atmospheric deposition. Excess nitrogen is emitted to the atmosphere where it can be transported great distances before being deposited back to the Earth's surface.
Biogeochemical Responses to Atmospheric Nitrogen Deposition in Subalpine Ecosystems of the Cascades
Author: Justin Paul Poinsatte
Publisher:
Published: 2017
Total Pages: 183
ISBN-13:
DOWNLOAD EBOOKWe examined the influence of snow regime on subalpine ecosystem C and N cycling at Mount Rainier under ambient conditions and in climate change scenarios. Timing of snow release influenced ecosystem C and N storage and loss. Climate change may reduce snow accumulation by up to 80% at Mount Rainier by 2050. Snowpack loss may enhance ecosystem C and N accumulation during the growing season and increase winter N leaching.
Ecological Dynamics on Yellowstone's Northern Range
Author: National Research Council
Publisher: National Academies Press
Published: 2002-02-01
Total Pages: 199
ISBN-13: 0309083451
DOWNLOAD EBOOKEcological Dynamics on Yellowstone's Northern Range discusses the complex management challenges in Yellowstone National Park. Controversy over the National Park Service's approach of "natural regulation" has heightened in recent years because of changes in vegetation and other ecosystem components in Yellowstone's northern range. Natural regulation minimizes human impacts, including management intervention by the National Park Service, on the park ecosystem. Many have attributed these changes to increased size of elk and other ungulate herds. This report examines the evidence that increased ungulate populations are responsible for the changes in vegetation and that the changes represent a major and serious change in the Yellowstone ecosystem. According to the authors, any human intervention to protect species such as the aspen and those that depend on them should be prudently localized rather than ecosystem-wide. An ecosystem-wide approach, such as reducing ungulate populations, could be more disruptive. The report concludes that although dramatic ecological change does not appear to be imminent, approaches to dealing with potential human-caused changes in the ecosystem, including those related to climate change, should be considered now. The need for research and public education is also compelling.
Relationship Between Microbes and the Environment for Sustainable Ecosystem Services, Volume 1
Author: Jastin Samuel
Publisher: Elsevier
Published: 2022-05-18
Total Pages: 400
ISBN-13: 0323910564
DOWNLOAD EBOOKRelationship Between Microbes and Environment for Sustainable Ecosystem Services, Volume One: Microbial Products for Sustainable Ecosystem Services promotes advances in sustainable solutions, value-added products, and fundamental research in microbes and the environment. Topics include advanced and recent discoveries in the use of microbes for sustainable development. Users will find reference information ranging from the description of various microbial applications for sustainability in different aspects of food, energy, the environment and social development. Volume One includes the direct and indirect role of bacteria, fungi, actinomycetes, viruses, mycoplasma and protozoans in the development of products contributing towards sustainable. The book provides a holistic approach to the most recent advances in the application of various microbes as a biotechnological tool for a vast range of sustainable applications, modern practices, exploring futuristic strategies to harness its full potential. Covers the latest developments, recent applications and future research avenues in microbial biotechnology for sustainable development Includes expressive tables and figures with concise information about sustainable ecosystem services Provides a wide variety of applications and modern practices of harnessing the potential of microbes in the environment
Mapping and Estimation of Nitrogen and Sulfur Atmospheric Deposition Fluxes in Central Region of the Mexican Bajio
Author: Rosa Maria Ceron Breton
Publisher:
Published: 2022
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKThe objective of this study was to assess the spatial and temporal distribution of nitrogen and sulfur deposition and its relationship with meteorological conditions in the metropolitan area of Le√≥n in Guanajuato, M√©xico. N and S atmospheric deposition was collected using passive samplers (IER) in 10 sites in Le√≥n City during three climatic seasons in 2018. Nitrate, ammonium, and sulfate concentrations and deposition fluxes of N and S were determined. From wind and air-mass trajectories analysis, mechanisms and possible sources contributing to N and S deposition in the study area were assessed. Atmospheric deposition fluxes were compared to critical load values reported for sensitive ecosystems in Europe. It was found that mean deposition flux for N (5.82 Kg N ha,àí1 year,àí1) was within the range of values reported for sensitive ecosystems in Nuevo M√©xico, Europe, and California. On the other hand, the mean deposition flux for S (13.77 S Kg ha,àí1 year,àí1) exceeded the critical load values proposed for Europe, suggesting that current S deposition could be a risk for ecosystems and water bodies in the region.
Nitrogen Cycling in the North Atlantic Ocean and its Watersheds
Author: Robert W. Howarth
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 300
ISBN-13: 9400917767
DOWNLOAD EBOOKHuman activity has dramatically altered the global nitrogen cycle in recent decades. These changes are not evenly distributed around the world; rather, they are greatest in regions of significant industrial and agricultural activity, as the synthesis and use of inorganic fertilizers, cultivation of legumes, burning of fossil fuels, and the simple act of concentrating humans and animals in dense populations all lead to the release of excess, reactive forms of nitrogen into the environment. In part because reactive nitrogen is frequently a limiting nutrient in many terrestrial and aquatic systems, an excess can lead to a variety of adverse effects on both environmental and human health. The North Atlantic Ocean and its contributing watersheds constitute a region which has seen perhaps the greatest increase in anthropogenically-derived nitrogen. In May of 1994, the International Scope Nitrogen Project, with funding from the Andrew Mellon Foundation, the United Nations Environment Program, and the World Meteorological Organization, sponsored a workshop held on Block Island, RI, USA, entitled `Nitrogen Dynamics of the North Atlantic Basin'. More than 50 scientists from 12 different countries convened with a unique set of goals: an integrated and comprehensive estimate of the current nitrogen cycle of the ocean, coastal systems, and contributing watersheds of the North Atlantic region; an analysis of human-induced changes to those cycles; and an assessment of the current and future effects of human-induced changes to nitrogen cycling throughout the globe.
