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The Importance To Upland Vegetation Of Enhanced Nitrogen Deposition At High Altitude
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Book Synopsis The Importance to Upland Vegetation of Enhanced Nitrogen Deposition at High Altitude by : William Kevin Hicks
Download or read book The Importance to Upland Vegetation of Enhanced Nitrogen Deposition at High Altitude written by William Kevin Hicks and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of enhanced nitrogen deposition to upland vegetation by : I D (Ian) Leith
Download or read book Effects of enhanced nitrogen deposition to upland vegetation written by I D (Ian) Leith and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The importance to vegetation of increased nitrogen deposition at high altitude by : K. Hicks
Download or read book The importance to vegetation of increased nitrogen deposition at high altitude written by K. Hicks and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Enhanced Nitrogen Deposition on Upland Vegetation Using Open-top Chambers by : I. D. (Ian) Leith
Download or read book Effects of Enhanced Nitrogen Deposition on Upland Vegetation Using Open-top Chambers written by I. D. (Ian) Leith and published by . This book was released on 1995 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study is designed as a 3-year project to quantify the magnitude of effects of current inputs of fixed N (as wet deposition NO3- NO4+ and dry deposition NO2, NH3 and HNO3) over seminatural vegetation, e.g. for the UK uplands and heathiand. This report summarises work for year I, and so is at an early stage in the work. Simulated mist containing additional NH4 NO3 applied at a rate of 60 kg N ha-1 yr-1 stimulates above ground biomass production in dwarf shrubs and upland grasses by approximately 80-90%. No significant effect on root growth was found in any of the 4 species by increased N application. Therefore high N deposition alters biomass allocation in the upland species examined. Application of high N treatment significantly increased flower production in the dwarf shrub E. cinerea but not in either of the grasses. Changes in root/shoot ratios were found between species with E. cinerea and E. vugimtum having increased root partitioning. This may reflect the requirement of these ...
Book Synopsis Effects of enhanced nitrogen deposition to native upland plant communities. Progress report by : I D (Ian) Leith
Download or read book Effects of enhanced nitrogen deposition to native upland plant communities. Progress report written by I D (Ian) Leith and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impacts of Nitrogen Deposition on Upland Vegetation. Final Report by : I. D. (Ian) Leith
Download or read book Impacts of Nitrogen Deposition on Upland Vegetation. Final Report written by I. D. (Ian) Leith and published by . This book was released on 1998 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impacts of Nitrogen Deposition on Upland Vegetation. Annual Report by : David Fowler
Download or read book Impacts of Nitrogen Deposition on Upland Vegetation. Annual Report written by David Fowler and published by . This book was released on 1996 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impacts of nitrogen deposition on upland vegetation. Interim report by : I D (Ian) Leith
Download or read book Impacts of nitrogen deposition on upland vegetation. Interim report written by I D (Ian) Leith and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Nitrogen Deposition on Plant Community Dynamics in a Heterogeneous Savanna Landscape by : Elise M. Tulloss
Download or read book The Effects of Nitrogen Deposition on Plant Community Dynamics in a Heterogeneous Savanna Landscape written by Elise M. Tulloss and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Urbanization and agricultural intensification in California has increased N emissions and, consequently, deposition to adjacent oak savanna landscapes. The total amount and chemical form of this deposition varies across the landscape at multiple spatial scales and through time. At a coarse scale, there is a non-linear gradient in N deposition across the California oak savanna region such that savanna sites closest to sources of N emissions receive greater deposition than sites in more remote areas. At a fine scale within savanna sites, a strong research foundation in oak woodland systems has described heterogeneity in soil resources created by the existence of oak canopies. This phenomenon, termed islands of fertility, is a net result of enhanced nutrient inputs and retention facilitated by the tree, with nitrogen deposition being recently suggested as a primary cause of enhanced inputs. The interaction between the regional-scale gradient of N deposition, the local-scale island of fertility, and the seasonal variability of N deposition results in heterogeneous soil N resources. Nitrogen availability is greatest beneath oaks and at sites on the high end of the regional gradient and during seasonal pulses of N deposition associated with precipitation events. These heterogeneous soil N resources play a critical role in structuring plant communities under current and increased N deposition. The aim of this dissertation was to investigate how N deposition varies at multiple scales depending on specific landscape drivers, such as site context and vegetation structure, and tease apart the effect of that heterogeneous N deposition on native and exotic competitive dynamics relative to multiple controlling factors. I quantified a gradient of N deposition across 6 oak savanna sites in north-central California. At the regional scale, sites closer to pollutant emissions received greater N deposition and sites in remote areas received less. At the local, within-site scale, the oak canopy was a hotspot of higher N deposition. The magnitude of the hotspot effect beneath oaks was not constant across the regional gradient, but rather oaks at the high end of the regional gradient received proportionally more N deposition than oaks at the low end of the gradient. This finding emphasized the importance of landscape context to within-site dynamics. The N deposition gradient was complex because several other soil and climate variables co-varied. Subsequent research was designed to experimentally tease apart the relative effect of N deposition on plant community dynamics from other factors that varied across this complex gradient, including soil type, which varied across the regional scale, and light availability, which varied between canopy and open areas at the local scale. A greenhouse experiment examined competitive interactions among native and exotic grasses in response to N fertilization, soil type, and light availability. Native and exotic grasses were both most sensitive to N deposition during the period of rapid vegetative growth in early spring. Invasive exotic grass was not becoming competitively dominant under increased N. Overall, N increased plant biomass, height, and seed mass altering the outcome of species interactions in a few cases, and thus, was important not as a single driving factor, but rather in the context of the other environmental factors I manipulated. This result indicated that N deposition must be considered together with the complex suite of environmental factors to predict effects to plant communities. In advancing our understanding of landscape and ecosystem ecology, the dissertation research highlighted the importance of landscape context and complex interactions among spatially and temporally heterogeneous factors in influencing dynamics within wildlands.
Book Synopsis Eutrophication by : The Open University
Download or read book Eutrophication written by The Open University and published by The Open University. This book was released on with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 12-hour free course explained how eutrophication occurs, its effects on different types of habitat, and how it might be managed.
Book Synopsis Effects of nitrogen deposition on upland vegetation in Northern Britain by : S J. Woodin
Download or read book Effects of nitrogen deposition on upland vegetation in Northern Britain written by S J. Woodin and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of nitrogen deposition on ecosystems above and belowground by : Hui Wang
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:
Book Synopsis Atmospheric Nitrogen Deposition to Global Forests by : Enzai Du
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
Book Synopsis Biogeochemical Responses to Atmospheric Nitrogen Deposition in Subalpine Ecosystems of the Cascades by : Justin Paul Poinsatte
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.
Book Synopsis Atmospheric Ammonia by : Mark Sutton
Download or read book Atmospheric Ammonia written by Mark Sutton and published by Springer Science & Business Media. This book was released on 2008-12-30 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic emissions of ammonia cause a host of environmental impacts, including loss of biodiversity, soil acidification and formation of particulate matter in the atmosphere. Under the auspices of the UNECE Convention on Long Range Transboundary Air Pollution, around 80 international experts met to review the state of scientific knowledge. This book reports their analysis. It concludes that threshold levels for ammonia effects have been underestimated and sets new values, it assesses the independent evidence to verify reported reductions in regional ammonia emissions, and it reviews the uncertainties in modelling ammonia, both in "hot spots" and at the regional scale.
Download or read book Heathlands written by R. Aerts and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increased atmospheric nitrogen deposition and changes in the management of heathlands have caused a significant change in the species composition of the NW-European heathlands. This change from ericaceous towards gramineous dominance is analysed in detail in Heathlands: Patterns and Processes in a Changing Environment. Special emphasis is put on the effects of increased atmospheric nutrient input on nutrient cycling, competition between plant species and plant--herbivore interactions. The possibilities for the long-term conservation of heathlands are discussed by considering regeneration from seed and the usefulness of mathematical management models. The book provides a synthesis of pure and applied plant ecology. It is vital reading for plant ecologists, biological conservationists, heathland managers and government decision makers.
Book Synopsis Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards by :
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2006 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: