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Author : Hui Wang
Publisher : Frontiers Media SA
ISBN 13 : 2832517056
Total Pages : 245 pages
Book Rating : 4.8/5 (325 download)
Download or read book Effects of nitrogen deposition on ecosystems above and belowground written by Hui Wang and published by Frontiers Media SA. This book was released on 2023-03-09 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark A. Sutton
Publisher : Springer Science & Business Media
ISBN 13 : 9400779399
Total Pages : 537 pages
Book Rating : 4.4/5 (7 download)
Download or read book Nitrogen Deposition, Critical Loads and Biodiversity written by Mark A. Sutton and published by Springer Science & Business Media. This book was released on 2014-04-10 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together extended reviews and papers of new scientific research on atmospheric nitrogen deposition impacts globally. While there is a wealth of evidence on the magnitude, components and effects of nitrogen disposition on floral biodiversity in Europe and North America, there is an obvious lack of information on impacts on above- and below-ground fauna, and all impacts in other parts of the world, with no clear overview of how the different strands of evidence fit together. This overall synthesis is targeted at the international conventions, but is equally readable for scientists, environmental managers, conservation agencies and policy makers. 'This timely book highlights the global nitrogen deposition problem. Major regions of the world are exceeding sustainability thresholds for adverse effects on ecosystem function and biodiversity. This highlights the importance of ongoing work, including under the Convention on Biological Diversity, in developing indicators and monitoring nitrogen deposition effects to enable appropriate measures. This book presents a milestone towards this global goal as the international community works toward meeting the Aichi Biodiversity Targets, especially Target 8: "By 2020, pollution, including from excess nutrients, has been brought to levels that are not detrimental to ecosystem function and biodiversity". Braulio Ferreira de Souza Dias, Executive Secretary, Convention on Biological Diversity “This key volume highlights the global challenge to reduce atmospheric nitrogen pollution resulting from energy production, transport and agricultural activities. It takes forward the agenda recently launched in the UNEP commissioned report ‘Our Nutrient World”. Dr. Anjan Datta, UNEP.
Author : Jennifer Hansen
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (811 download)
Download or read book Assessment of Atmospheric Nitrogen Deposition written by Jennifer Hansen and published by . This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric N deposition is becoming a stressor on ecosystems in the western U.S. There are few National Atmospheric Deposition Program (NADP) monitoring sites and little is known about N deposition impacts on terrestrial ecosystems in the Intermountain West. Alpine ecosystems may be particularly sensitive to changes in N inputs because of the shallow soils, short growing seasons, and sparse plant cover. This study focused on N deposition effects on an alpine ecosystem in Grand Teton National Park located along a modeled N deposition gradient (Moose Basin high, Paint Brush Medium, Rendezvous Mtn. low) and across contrasting edaphic conditions using a two factorial design. At each location, we estimated N deposition and measured soil moisture and temperature across edaphic conditions, soil parameters (total and extractable N, available N, net mineralization, and nitrification potential), and plant community characteristics (species richness, species composition, percent cover, plant and root biomass, N content, and above and below ground plant components). These response variables were used to test whether there is a north to south N deposition gradient, if N deposition and N status are affected by soil moisture content, and whether soil and/or plant properties were affected by N deposition and edaphic conditions and if the response variables can serve as indicators as early warning signs of N saturation. The Tetons receive 1.42 kg N ha-1 yr-1 with more in winter (0.85-1.17 kg N ha-1 yr-1) than during the summer (0.25 kg N ha-1 yr-1). Soil moisture content was related to snowpack accumulations and melt but did not affect N status. Moose Basin (i.e., high N deposition) showed characteristics of an N-rich site shown by higher soil N content and extractable soil NH4 +, higher nitrification potential, low C:N ratios, more aboveground biomass, and higher foliar N content compared to the RDV location. Rendezvous Mountain (i.e., low N deposition) showed characteristics of an N-poor site having lower soil extractable N, high C:N ratios in soil and roots, and low N mineralization potential. Paint Brush was highly variable in soil and plant characteristics and most clearly showed differences between wet and dry sites. In terms of N status, it was intermediate and shared similarities with both N-poor and N-rich sites. This study shows that it is important to consider both soil and plant indicators (i.e., total and extractable N in soils, soil nitrification potential, above and below-ground biomass, and N content) together to assess N status. The C:N ratio of plants and soils was less informative than anticipated. Species richness and composition was a less sensitive indicator of N-induced change and should be considered for long-term assessments only.
Author : S.J. Langan
Publisher : Springer
ISBN 13 : 9401733562
Total Pages : 258 pages
Book Rating : 4.4/5 (17 download)
Download or read book The Impact of Nitrogen Deposition on Natural and Semi-Natural Ecosystems written by S.J. Langan and published by Springer. This book was released on 2014-11-14 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date synthesis of the understanding of the interaction between the emission of nitrogen, its deposition and impact on the most important components of natural and semi-natural ecosystems. The work consists of contributions from internationally renowned research scientists. Individual chapters deal with the factors and processes related to nitrogen deposition and soils, non-forest vegetation communities, forest ecosystems, and surface waters. The assessment of these impacts is discussed in terms of setting critical loads. The book is aimed at researchers, advanced course students and policy makers/advisors involved with aspects of the impact of air pollution.
Download or read book Effects of Nitrogen Additions on Above- and Belowground Carbon Dynamics in Two Tropical Forests written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic nitrogen (N) deposition is increasing rapidly in tropical regions, adding N to ecosystems that often have high background N availability. Tropical forests play an important role in the global carbon (C) cycle, yet the effects of N deposition on C cycling in these ecosystems are poorly understood. We used a field N-fertilization experiment in lower and upper elevation tropical rain forests in Puerto Rico to explore the responses of above- and belowground C pools to N addition. As expected, tree stem growth and litterfall productivity did not respond to N fertilization in either of these Nrich forests, indicating a lack of N limitation to net primary productivity (NPP). In contrast, soil C concentrations increased significantly with N fertilization in both forests, leading to larger C stocks in fertilized plots. However, different soil C pools responded to N fertilization differently. Labile (low density) soil C fractions and live fine roots declined with fertilization, while mineral-associated soil C increased in both forests. Decreased soil CO2 fluxes in fertilized plots were correlated with smaller labile soil C pools in the lower elevation forest (R2 = 0.65, p\0.05), and with lower live fine root biomass in the upper elevation forest (R2 = 0.90, p\0.05). Our results indicate that soil C storage is sensitive to N deposition in tropical forests, even where plant productivity is not N-limited. The mineral-associated soil C pool has the potential to respond relatively quickly to N additions, and can drive increases in bulk soil C stocks in tropical forests.
Author : Mark A. Sutton
Publisher : Cambridge University Press
ISBN 13 : 1139501372
Total Pages : 665 pages
Book Rating : 4.1/5 (395 download)
Download or read book The European Nitrogen Assessment written by Mark A. Sutton and published by Cambridge University Press. This book was released on 2011-04-14 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting the first continental-scale assessment of reactive nitrogen in the environment, this book sets the related environmental problems in context by providing a multidisciplinary introduction to the nitrogen cycle processes. Issues of upscaling from farm plot and city to national and continental scales are addressed in detail with emphasis on opportunities for better management at local to global levels. The five key societal threats posed by reactive nitrogen are assessed, providing a framework for joined-up management of the nitrogen cycle in Europe, including the first cost-benefit analysis for different reactive nitrogen forms and future scenarios. Incorporating comprehensive maps, a handy technical synopsis and a summary for policy makers, this landmark volume is an essential reference for academic researchers across a wide range of disciplines, as well as stakeholders and policy makers. It is also a valuable tool in communicating the key environmental issues and future challenges to the wider public.
Author : Georgina Elizabeth Southon
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (827 download)
Download or read book Responses To, and Bioindicators Of, Atmospheric Nitrogen Deposition on Lowland Heathland Ecosystems at Both Experimental and Field-scale Levels written by Georgina Elizabeth Southon and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reactive nitrogen (N) as a result of anthropogenic activities (e.g. fossil fuel combustion, fertiliser manufacturing and intensive agricultural practices), now dominates the global nitrogen cycle. For sensitive ecosystems across the globe, perturbation of the nitrogen cycle as a result of increased inputs of reactive N, has been seen to have a profoundly detrimental impact on biodiversity and ecosystem structure and function. Concerns surrounding the conservation and protection of both natural and semi-natural habitats from the damaging effects of N deposition, have prompted widescale research, that aims to understand and quantify ecosystem responses to elevated N inputs. Much of this research is in the experimental domain, based upon the simulation of N deposition within controlled conditions. The research outlined in this thesis, is principally focused on the findings of a long-term experimental approach on a lowland heathland system in the south east of England. N additions of 30 kg N, ha−1, yr−1 were seen to cause large, persistent effects on Calluna growth, phenology and chemistry, retard the development of lower plant groups and alter soil biogeochemical processes. Interactions between N inputs and climatic stress were also observed, with N additions seen to significantly modify Calluna's response to drought conditions. Interactions between N deposition and climate were also evident at a larger scale, following a nationwide survey of UK heathlands across broad pollution, climatic and geographic gradients. Representing one of the first surveys to test both above and below ground responses to ambient N deposition across UK heathlands, the findings provide compelling evidence that many N driven changes observed within an experimental context, are also occurring at a nationwide scale. Such findings facilitate the identification of robust bioindicators of N deposition that could be successfully integrated into heathland conservation measures. Given that current emissions and deposition rates of N are predicted to double by 2050, and in regard to the future climate changes that are expected, research of the kind presented within this field of research is of the upmost importance if heathlands, and other sensitive ecosystems, are to be preserved.
Author : Xuejun Liu
Publisher : Springer Nature
ISBN 13 : 9811385149
Total Pages : 331 pages
Book Rating : 4.8/5 (113 download)
Download or read book Atmospheric Reactive Nitrogen in China written by Xuejun Liu and published by Springer Nature. This book was released on 2019-10-04 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric reactive nitrogen (N) emissions, as an important component of global N cycle, have been significantly altered by anthropogenic activities, and consequently have had a global impact on air pollution and ecosystem services. Due to rapid agricultural, industrial, and urban development, China has been experiencing an increase in reactive N emissions and deposition since the late 1970s. Based on a literature review, this book summarizes recent research on: 1) atmospheric reactive N in China from a global perspective (Chapter 1); 2) atmospheric reactive N emissions, deposition and budget in China (Chapters 2-5); 3) the contribution of atmospheric reactive N to air pollution (e.g., haze, surface O3, and acid deposition) (Chapters 6-8); 4) the impacts of N deposition on sensitive ecosystems (e.g., forests, grasslands, deserts and lakes) (Chapters 9-12); and 5) the regulatory strategies for mitigation of atmospheric reactive N pollution from agricultural and non-agricultural sectors in China (Chapters 13-14). As such it offers graduate students, researchers, educators in agricultural, ecological and environmental sciences, and policy makers a glimpse of the environmental issues related to reactive N in China .
Author : Ernst-Detlef Schulze
Publisher : Springer Science & Business Media
ISBN 13 : 3642572197
Total Pages : 520 pages
Book Rating : 4.6/5 (425 download)
Download or read book Carbon and Nitrogen Cycling in European Forest Ecosystems written by Ernst-Detlef Schulze and published by Springer Science & Business Media. This book was released on 2013-12-01 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume quantifies carbon storage in managed forest ecosystems not only in biomass, but also in all soil compartments. It investigates the interaction between the carbon and nitrogen cycles by working along a north-south transect through Europe that starts in northern Sweden, passes through a N-deposition maximum in central Europe and ends in Italy. For the first time biogeochemical processes are linked to biodiversity on a large geographic scale and with special focus on soil organisms. The accompanying CD-ROM provides a complete database of all flux, storage and species observations for modellers.
Author : Enzai Du
Publisher : Elsevier
ISBN 13 : 0323998488
Total Pages : 306 pages
Book Rating : 4.3/5 (239 download)
Download or read book Atmospheric Nitrogen Deposition to Global Forests written by Enzai Du and published by Elsevier. This book was released on 2023-10-22 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric Nitrogen Deposition in Global Forests: Spatial Variation, Impacts, and Management Implications provides the most 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 nitrogen deposition in global forests. The book 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. Finally, the book reviews indicators and thresholds for nitrogen saturation in global forests and analyzes remediation options to reduce impacts of excess nitrogen deposition. This 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. Offers a systematic view of the ecological impacts of enhanced nitrogen deposition Provides the most comprehensive knowledge on spatial variation and the ecological impacts of reactive nitrogen deposition in global forests Presents expert research and findings on forest management options to remediate negative impacts
Author :
Publisher :
ISBN 13 :
Total Pages : 291 pages
Book Rating : 4.:/5 (758 download)
Download or read book Assessment of Nitrogen Deposition Effects and Empirical Critical Loads of Nitrogen for Ecoregions of the United States written by and published by . This book was released on 2011 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report synthesizes current research relating atmospheric nitrogen (N) deposition to effects on terrestrial and aquatic ecosystems in the United States and to identify empirical critical loads for atmospheric N deposition. The report evaluates the following receptors: freshwater diatoms, mycorrhizal fungi and other soil microbes, lichens, herbaceous plants, shrubs, and trees. The main responses reported fell into two categories: (1) biogeochemical; and (2) individual species, population, and community responses. The range of critical loads for nutrient N reported for U.S. ecoregions, inland surface waters, and freshwater wetlands is presented. This range spans the range of N deposition observed over most of the country. The empirical critical loads for N tend to increase in the following sequence for four different life forms: diatoms, lichens and bryophytes, mycorrhizal fungi, herbaceous plants, shrubs, trees.
Author : B A. Emmett
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (74 download)
Download or read book Natural abundance of 15N in forests across a nitrogen deposition gradient written by B A. Emmett and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chronic atmospheric nitrogen deposition can alter the rate of internal nitrogen cycling and increase the magnitude of N leaching losses in forested ecosystems, As fractionation of nitrogen in favour of the lighter N-14 occurs during various transformations associated with N-enrichment and nitrogen loss, it has been proposed that the N-15 Signal of vegetation may provide a useful tool in evaluating the past and current N status of forested ecosystems. A series of coniferous forests across a European nitrogen deposition gradient within the NITREX project provided an opportunity to test the relationships between nitrogen supply from atmospheric deposition and the relative N-15-enrichment of vegetation to soil, across a large geographical area. Most delta(15)N values for above-and below-ground tree components, soil at four depths, bulk precipitation and/or throughfall water and soil solution or outflow water values were within those observed elsewhere except for a few notable exceptions. There was a significant positive relationship between the delta(15)N enrichment of the tree foliage relative to the soil horizons (or the enrichment factor), and nitrogen flux in the throughfall if Aber forest, N. Wales, was excluded from the regression analysis. An unusually high enrichment factor at the Aber site indicated that a the high rate of N cycling at the site was in excess of that predicted from current N deposition. This was attributed to the effect of ploughing and tree planting on the relatively N- and clay-rich mineral horizons at Aber compared to other sites. Highly significant relationships (P
Author : Dave Reay
Publisher : CABI
ISBN 13 : 1845931890
Total Pages : 306 pages
Book Rating : 4.8/5 (459 download)
Download or read book Greenhouse Gas Sinks written by Dave Reay and published by CABI. This book was released on 2007 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this first comprehensive handbook of the earth's sinks for greenhouse gases, leading researchers from around the world provide an expert synthesis of current understanding and uncertainties. It will be a valuable resource for students, researchers and practitioners in conservation, ecology and environmental studies.
Author : Justin Paul Poinsatte
Publisher :
ISBN 13 :
Total Pages : 183 pages
Book Rating : 4.:/5 (111 download)
Download or read book Biogeochemical Responses to Atmospheric Nitrogen Deposition in Subalpine Ecosystems of the Cascades written by Justin Paul Poinsatte and published by . This book was released on 2017 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: We 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.
Author :
Publisher :
ISBN 13 :
Total Pages : 39 pages
Book Rating : 4.:/5 (665 download)
Download or read book Soil Nitrogen Amendments and Insect Herbivory Alter Above-and Belowground Plant Biomass in an Old-field Ecosystem written by and published by . This book was released on 2010 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutrient availability and herbivory can regulate primary production in ecosystems, but little is known about how, or whether, they may interact with one another. Here I investigate how nitrogen availability and insect herbivory interact to alter above- and belowground plant community biomass in an old-field ecosystem. In 2004, 36 experimental plots were established in which soil nitrogen (N) availability (at three levels) was manipulated and insect abundance (at two levels) in a completely randomized plot design. In 2009, after six years of treatment, I measured aboveground biomass and assessed root production at peak growth. Overall, I found a significant effect of soil N availability on both above- and belowground plant biomass while insects affected only aboveground biomass of subdominant plant species and coarse root production; there were no statistical interactions between N availability and insect herbivory for any response variable. Specifically, responses of aboveground and belowground community biomass to nutrients were driven by reductions in soil N, but not additions, indicating that soil N may not be primarily limiting production in this ecosystem. Insect herbivory altered the aboveground biomass of the subdominant plant species and altered allocation patterns to coarse root production belowground. Overall, the results of six years of nutrient amendments and insect removals suggest strong bottom-up influences on total plant community productivity.
Author : Stefan Löfgren
Publisher : Nordic Council of Ministers
ISBN 13 : 9788773036044
Total Pages : 64 pages
Book Rating : 4.0/5 (36 download)
Download or read book Influence of Atmospheric Nitrogen Deposition on Nitrogen Leakage to Surface Water in Forest Ecosystems written by Stefan Löfgren and published by Nordic Council of Ministers. This book was released on 1991 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David A. Wardle
Publisher : Princeton University Press
ISBN 13 : 0691074879
Total Pages : 400 pages
Book Rating : 4.6/5 (91 download)
Download or read book Communities and Ecosystems written by David A. Wardle and published by Princeton University Press. This book was released on 2002-05-12 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil.
