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Effect Of Soil Compaction And Organic Matter Removal On Genotypic Diversity Genetic Structure And Trait Expressions In Aspen
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Book Synopsis EFFECT OF SOIL COMPACTION AND ORGANIC MATTER REMOVAL ON GENOTYPIC DIVERSITY, GENETIC STRUCTURE, AND TRAIT EXPRESSIONS IN ASPEN by :
Download or read book EFFECT OF SOIL COMPACTION AND ORGANIC MATTER REMOVAL ON GENOTYPIC DIVERSITY, GENETIC STRUCTURE, AND TRAIT EXPRESSIONS IN ASPEN written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Quaking aspen (Populus tremuloides, Michx.) is a fast growing tree which is broadly distributed in North America. It reproduces both clonally through root suckers and sexually through seeds. In order to assess the effect of postharvest treatment on genotypic diversity and structure and on phenotypic trait expressions, we analyzed a total of 323 stems in three control plots and in three treatment plots in Long-Term Soil Productivity study site at Ottawa National Forest with heavy soil compaction and forest floor removal at seven highly variable microsatellite markers and for 25 phenotypic traits. Overall higher spatial aggregation of ramets from the same clonal assemblies and spatial separation of different clonal assemblies was observed in the treatment plots as compared to control plots. Phenotypic and genetic clonal delineation showed a high correspondence in two treatment plots with the most pronounced spatial genetic structure. Phenotypic delineation of clonal colonies was not possible in other plots where clonal colonies were spatially intermixed or occupied a large area. Heavy soil compaction and forest floor removal might have restricted the spread of clonal colonies in treatment plots. While treatment had little effects on genetic and phenotypic separation among plots, very high genetic differentiation was found among most plots with amaximum pairwise RST differentiation of 35.8%. One treatment plot was strongly differentiated phenotypically from all other plots likely as result of micro-environmental variation. Consequently, micro-environmental variation and genetic differences among plots should be considered when treatment effects on phenotypic trait expression are analyzed.
Book Synopsis Soil and Vegetation Response to Soil Compaction and Forest Floor Removal After Aspen Harvesting by :
Download or read book Soil and Vegetation Response to Soil Compaction and Forest Floor Removal After Aspen Harvesting written by and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil Compaction and Organic Matter Affect Conifer Seeding Nonmycorrhizal and Ectomycorrhizal Rood Tip Abundance and Diversity by :
Download or read book Soil Compaction and Organic Matter Affect Conifer Seeding Nonmycorrhizal and Ectomycorrhizal Rood Tip Abundance and Diversity written by and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aspen and White Spruce Responses to Organic Matter Removal and Soil Compaction in the BWBS Long-Term Soil Productivity Study by : Richard D. Kabzems
Download or read book Aspen and White Spruce Responses to Organic Matter Removal and Soil Compaction in the BWBS Long-Term Soil Productivity Study written by Richard D. Kabzems and published by . This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ten-year Results from the Long-Term Soil Productivity Study in Aspen Ecosystems of the Northern Great Lakes Region by : Richard Voldseth
Download or read book Ten-year Results from the Long-Term Soil Productivity Study in Aspen Ecosystems of the Northern Great Lakes Region written by Richard Voldseth and published by . This book was released on 2011 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecological Effects of Genotypic Diversity on Community and Ecosystem Function by : Megan K. Kanaga
Download or read book Ecological Effects of Genotypic Diversity on Community and Ecosystem Function written by Megan K. Kanaga and published by . This book was released on 2009 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genotypic diversity within populations can have important evolutionary consequences, but the ecological effects of intraspecific genetic variation on community and ecosystem function have only been studied in a few systems. I present the results of a three-year study designed to address the ecological impacts of genotypic diversity in quaking aspen (Populus tremuloides Michx.), using aspen genotypes planted across genotypic diversity levels (monoculture and mixture) and watering treatment levels (well-watered and water-limited). First, I demonstrated that significant variation exists among genotypes for a wide range of growth, morphological and physiological traits, and quantified high heritability and coefficient of genetic variation values for those traits. This demonstrates that heritable phenotypic variation exists within an aspen population, which could potentially have community and ecosystem implications. Secondly, I collected ground-dwelling arthropods across experimental treatment levels to determine if there are any community-level implications of genotypic diversity and watering treatment. Grounddwelling arthropods were significantly affected by the genotypic diversity x watering treatment interaction, such that arthropod taxonomic diversity was lowest in water-limited genotypic mixtures. This result runs counter to the bulk of the plant diversity-arthropod diversity literature, which predicts that plant and arthropod diversity should be positively correlated, and highlights the importance of environmental conditions in mediating the plant-arthropod diversity relationship. Lastly, I show that there are no overall effects of genotypic diversity or watering treatment on tree growth patterns. Instead, there are high levels of variation among genotypes in their responses to treatments (significant genotype x diversity x watering treatment interactions), which are often opposing in direction. I also show that there are significant collection site x diversity x watering treatment interactions, demonstrating that genotypes vary in their response to experimental treatments based in part on their original collection site conditions in the field. This study demonstrates that aspen populations contain high levels of genotypic diversity, but that the ecological effects of genotypic diversity are mediated by the environment (in this case, watering treatment) and can be considerably more complicated than found in most previous studies.
Book Synopsis Soil and Vegetation Response to Soil Compaction and Forest Floor Removal After Aspen Harvesting by : David H. Alban
Download or read book Soil and Vegetation Response to Soil Compaction and Forest Floor Removal After Aspen Harvesting written by David H. Alban and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Root Ecology written by Hans de Kroon and published by Springer Science & Business Media. This book was released on 2003-05-21 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the course of evolution, a great variety of root systems have learned to overcome the many physical, biochemical and biological problems brought about by soil. This development has made them a fascinating object of scientific study. This volume gives an overview of how roots have adapted to the soil environment and which roles they play in the soil ecosystem. The text describes the form and function of roots, their temporal and spatial distribution, and their turnover rate in various ecosystems. Subsequently, a physiological background is provided for basic functions, such as carbon acquisition, water and solute movement, and for their responses to three major abiotic stresses, i.e. hard soil structure, drought and flooding. The volume concludes with the interactions of roots with other organisms of the complex soil ecosystem, including symbiosis, competition, and the function of roots as a food source.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251312702 Total Pages :576 pages Book Rating :4.2/5 (513 download)
Book Synopsis The State of the World's Biodiversity for Food and Agriculture by : Food and Agriculture Organization of the United Nations
Download or read book The State of the World's Biodiversity for Food and Agriculture written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-03-12 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The State of the World's Biodiversity for Food and Agriculture presents the first global assessment of biodiversity for food and agriculture worldwide. Biodiversity for food and agriculture is the diversity of plants, animals and micro-organisms at genetic, species and ecosystem levels, present in and around crop, livestock, forest and aquatic production systems. It is essential to the structure, functions and processes of these systems, to livelihoods and food security, and to the supply of a wide range of ecosystem services. It has been managed or influenced by farmers, livestock keepers, forest dwellers, fish farmers and fisherfolk for hundreds of generations. Prepared through a participatory, country-driven process, the report draws on information from 91 country reports to provide a description of the roles and importance of biodiversity for food and agriculture, the drivers of change affecting it and its current status and trends. It describes the state of efforts to promote the sustainable use and conservation of biodiversity for food and agriculture, including through the development of supporting policies, legal frameworks, institutions and capacities. It concludes with a discussion of needs and challenges in the future management of biodiversity for food and agriculture. The report complements other global assessments prepared under the auspices of the Commission on Genetic Resources for Food and Agriculture, which have focused on the state of genetic resources within particular sectors of food and agriculture.
Book Synopsis Microbial Strategies for Crop Improvement by : Mohammad Saghir Khan
Download or read book Microbial Strategies for Crop Improvement written by Mohammad Saghir Khan and published by Springer Science & Business Media. This book was released on 2009-08-25 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an ever-increasing human population, the demand placed upon the agriculture sector to supply more food is one of the greatest challenges for the agrarian community. In order to meet this challenge, environmentally unfriendly agroch- icals have played a key role in the green revolution and are even today commonly recommended to circumvent nutrient de?ciencies of the soils. The use of ag- chemicals is, though, a major factor for improvement of plant production; it causes a profound deteriorating effect on soil health (soil fertility) and in turn negatively affects the productivity and sustainability of crops. Concern over disturbance to the microbial diversity and consequently soil fertility (as these microbes are involved in biogeochemical processes), as well as economic constraints, have prompted fun- mental and applied research to look for new agro-biotechnologies that can ensure competitive yields by providing suf?ciently not only essential nutrients to the plants but also help to protect the health of soils by mitigating the toxic effects of certain pollutants. In this regard, the role of naturally abundant yet functionally fully unexplored microorganisms such as biofertilizers assume a special signi?cance in the context of supplementing plant nutrients, cost and environmental impact under both conventional practices and derelict environments. Therefore, current devel- ments in sustainability involve a rational exploitation of soil microbial communities and the use of inexpensive, though less bio-available, sources of plant nutrients, which may be made available to plants by microbially-mediated processes.
Book Synopsis Real Gardens Grow Natives by : Eileen M Stark
Download or read book Real Gardens Grow Natives written by Eileen M Stark and published by Mountaineers Books. This book was released on 2014-09-24 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: CLICK HERE to download sample native plants from Real Gardens Grow Natives For many people, the most tangible and beneficial impact they can have on the environment is right in their own yard. Aimed at beginning and veteran gardeners alike, Real Gardens Grow Natives is a stunningly photographed guide that helps readers plan, implement, and sustain a retreat at home that reflects the natural world. Gardening with native plants that naturally belong and thrive in the Pacific Northwest’s climate and soil not only nurtures biodiversity, but provides a quintessential Northwest character and beauty to yard and neighborhood! For gardeners and conservationists who lack the time to read through lengthy design books and plant lists or can’t afford a landscape designer, Real Gardens Grow Natives is accessible yet comprehensive and provides the inspiration and clear instruction needed to create and sustain beautiful, functional, and undemanding gardens. With expert knowledge from professional landscape designer Eileen M. Stark, Real Gardens Grow Natives includes: * Detailed profiles of 100 select native plants for the Pacific Northwest west of the Cascades, plus related species, helping make plant choice and placement. * Straightfoward methods to enhance or restore habitat and increase biodiversity * Landscape design guidance for various-sized yards, including sample plans * Ways to integrate natives, edibles, and nonnative ornamentals within your garden * Specific planting procedures and secrets to healthy soil * Techniques for propagating your own native plants * Advice for easy, maintenance using organic methods
Book Synopsis Handbook of Plant Nutrition by : Allen V. Barker
Download or read book Handbook of Plant Nutrition written by Allen V. Barker and published by CRC Press. This book was released on 2016-04-19 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: The burgeoning demand on the world food supply, coupled with concern over the use of chemical fertilizers, has led to an accelerated interest in the practice of precision agriculture. This practice involves the careful control and monitoring of plant nutrition to maximize the rate of growth and yield of crops, as well as their nutritional value.
Book Synopsis Silvicultural Guide to Managing for Black Spruce, Jack Pine, and Aspen on Boreal Forest Ecosites in Ontario by : Ontario. Ministry of Natural Resources
Download or read book Silvicultural Guide to Managing for Black Spruce, Jack Pine, and Aspen on Boreal Forest Ecosites in Ontario written by Ontario. Ministry of Natural Resources and published by . This book was released on 1997 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Litter Decomposition: a Guide to Carbon and Nutrient Turnover by :
Download or read book Litter Decomposition: a Guide to Carbon and Nutrient Turnover written by and published by Academic Press. This book was released on 2005-11-22 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Litter Decomposition describes one of the most important processes in the biosphere - the decay of organic matter. It focuses on the decomposition process of foliar litter in the terrestrial systems of boreal and temperate forests due to the greater amount of data from those biomes. The availability of several long-term studies from these forest types allows a more in-depth approach to the later stages of decomposition and humus formation. Differences between the decay of woody matter and foliar litter is discussed in detail and a different pattern for decomposition is introduced. While teachers and students in more general subjects will find the most basic information on decomposition processes in this book, scientists and graduate students working on decomposition processes will be entirely satisfied with the more detailed information and the overview of the latest publications on the topic as well as the methodological chapter where practical information on methods useful in decomposition studies can be found. Abundant data sets will serve as an excellent aid in teaching process and will be also of interest to researchers specializing in this field as no thorough database exists at the moment. Provides over 60 tables and 90 figures Offers a conceptual 3-step model describing the different steps of the decomposition process, demonstrating changes in the organic-chemical structure and nutrient contents Includes a synthesis of the current state of knowledge on foliar litter decomposition in natural systems Integrates more traditional knowledge on organic matter decomposition with current problems of environmental pollution, global change, etc. Details contemporary knowledge on organic matter decomposition
Book Synopsis Plant Resource Allocation by : Fakhri A. Bazzaz
Download or read book Plant Resource Allocation written by Fakhri A. Bazzaz and published by Elsevier. This book was released on 1997-07-23 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant Resource Allocation is an exploration of the latest insights into the theory and functioning of plant resource allocation. An international team of physiological ecologists has prepared chapters devoted to the fundamental topics of resource allocation. Comprehensive coverage of all aspects of resource allocation in plants All contributors are leaders in their respective fields
Book Synopsis Soil Compaction Studies by : Timothy Shaun Stafford Conlin
Download or read book Soil Compaction Studies written by Timothy Shaun Stafford Conlin and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first two experiments described in this report were designed to identify early signs of compaction-related stress in lodgepole pine (Pinus contorta), Douglas-fir (Pseudotsuga menziesii), and white spruce (Picea glauca). A secondary objective was to examine the interaction of soil moisture and compaction on initial seedling growth. The third experiment was designed to examine the efforts of soil compaction on the composition of the soil atmosphere, and is continuing.
Book Synopsis Soil Organic Matter in Sustainable Agriculture by : Fred Magdoff
Download or read book Soil Organic Matter in Sustainable Agriculture written by Fred Magdoff and published by CRC Press. This book was released on 2004-05-27 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recognition of the importance of soil organic matter (SOM) in soil health and quality is a major part of fostering a holistic, preventive approach to agricultural management. Students in agronomy, horticulture, and soil science need a textbook that emphasizes strategies for using SOM management in the prevention of chemical, biological, and physical problems. Soil Organic Matter in Sustainable Agriculture gathers key scientific reviews concerning issues that are critical for successful SOM management. This textbook contains evaluations of the types of organic soil constituents—organisms, fresh residues, and well-decomposed substances. It explores the beneficial effects of organic matter on soil and the various practices that enhance SOM. Chapters include an examination of the results of crop management practices on soil organisms, organic matter gains and losses, the significance of various SOM fractions, and the contributions of fungi and earthworms to soil quality and crop growth. Emphasizing the prevention of imbalances that lead to soil and crop problems, the text also explores the development of soils suppressive to plant diseases and pests, and relates SOM management to the supply of nutrients to crops. This book provides the essential scientific background and poses the challenging questions that students need to better understand SOM and develop improved soil and crop management systems.
