![]() |
Welcome to Loot.co.za!
Sign in / Register |Wishlists & Gift Vouchers |Help | Advanced search
|
Your cart is empty |
||
|
Books > Professional & Technical > Agriculture & farming > Forestry & silviculture: practice & techniques
Restoration ecology, as a scientific discipline, developed from practitioners' efforts to restore degraded land, with interest also coming from applied ecologists attracted by the potential for restoration projects to apply and/or test developing theories on ecosystem development. Since then, forest landscape restoration (FLR) has emerged as a practical approach to forest restoration particularly in developing countries, where an approach which is both large-scale and focuses on meeting human needs is required. Yet despite increased investigation into both the biological and social aspects of FLR, there has so far been little success in systematically integrating these two complementary strands. Bringing experts in landscape studies, natural resource management and forest restoration, together with those experienced in conflict management, environmental economics and urban studies, this book bridges that gap to define the nature and potential of FLR as a truly multidisciplinary approach to a global environmental problem. The book will provide a valuable reference to graduate students and researchers interested in ecological restoration, forest ecology and management, as well as to professionals in environmental restoration, natural resource management, conservation, and environmental policy.
This book takes a multi-disciplinary and critical look at what has changed over the last ten years in one of the world's most important and dynamic ecosystems, the Amazon floodplain or varzea. It also looks forward, assessing the trends that will determine the fate of environments and people of the varzea over the next ten years and providing crucial information that is needed to formulate strategies for confronting these looming realities.
Airborne laser scanning (ALS) has emerged as one of the most promising remote sensing technologies to provide data for research and operational applications in a wide range of disciplines related to management of forest ecosystems. This book provides a comprehensive, state-of-the-art review of the research and application of ALS in a broad range of forest-related disciplines, especially forest inventory and forest ecology. However, this book is more than just a collection of individual contributions – it consists of a well-composed blend of chapters dealing with fundamental methodological issues and contributions reviewing and illustrating the use of ALS within various domains of application. The reviews provide a comprehensive and unique overview of recent research and applications that researchers, students and practitioners in forest remote sensing and forest ecosystem assessment should consider as a useful reference text.
The plant fossil record indicates that the genus Metasequoia was widely distributed throughout the Northern Hemisphere from the early Late Cretaceous to the Plio-Pleistocene. Today the genus has shrunk to one species with approximately 5,000 mature individuals in southeastern China's Xiahoe Valley. This book distills the current understanding of the biology, ecology and physiology of fossil and living Metasequoia, current research directions and problems that remain unresolved.
In the last half century, because of the raising world population and because of the many environmental issues posed by the industrialization, the amount of arable land per person has declined from 0.32 ha in 1961-1963 to 0.21 ha in 1997-1999 and is expected to drop further to 0.16 ha by 2030 and therefore is a severe menace to food security (FAO 2006). At the same time, about 12 million ha of irrigated land in the developing world has lost its productivity due to waterlogging and salinity. Waterlogging is a major problem for plant cultivation in many regions of the world. The reasons are in part due to climatic change that leads to the increased number of precipitations of great intensity, in part to land degradation. Considering India alone, the total area suffering from waterlogging is estimated to be about 3.3 million ha (Bhattacharya 1992), the major causes of waterlogging include super- ous irrigation supplies, seepage losses from canal, impeded sub-surface drainage, and lack of proper land development. In addition, many irrigated areas are s- jected to yield decline because of waterlogging due to inadequate drainage systems. Worldwide, it has been estimated that at least one-tenth of the irrigated cropland suffers from waterlogging.
Forest inventories throughout the world have evolved gradually over time. The content as well as the concepts and de?nitions employed are constantly adapted to the users' needs. Advanced inventory systems have been established in many countries within Europe, as well as outside Europe, as a result of development work spanning several decades, in some cases more than 100 years. With continuously increasing international agreements and commitments, the need for information has also grown drastically, and reporting requests have become more frequent and the content of the reports wider. Some of the agreements made at the international level have direct impacts on national economies and international decisions, e. g. , the Kyoto Protocol. Thus it is of utmost importance that the forest information supplied is collected and analysed using sound scienti?c principles and that the information from different countries is comparable. European National Forest Inventory (NFI) teams gathered in Vienna in 2003 to discuss the new challenges and the measures needed to get data users to take full advantage of existing NFIs. As a result, the European National Forest Inventory Network (ENFIN), a network of NFIs, was established. The ENFIN members decided to apply for funding for meetings and collaborative activities. COST- European Cooperation in Science and Technology - provided the necessary ?n- cial means for the realization of the program.
The book is a fundamental reference source on reaction wood for wood scientists and technologists, plant biologists, silviculturists, forest ecologists, and anyone involved in the growing of trees and the processing of wood. It brings together our current understanding of all aspects of reaction wood, and is the first book to discuss both compression wood and tension wood. Trees produce reaction wood to maintain the vertical orientation of their stems and the optimum angle of each branch. They achieve this by laying down fibre cell walls in which differences in physical and chemical structure from those of normal fibres are expressed as differential stresses across the stem or branch. This process, while of obvious value for the survival of the tree, causes serious problems for the utilisation of timber. Timber derived from trees containing significant amounts of reaction wood is subject to dimensional instability on drying, causing twisting, bending and splitting. It is also difficult to work as timber, and for the pulp and paper industry the cost of removing the increased amount of lignin in compression wood is substantial. This has both practical and economic consequences for industry. Understanding the factors controlling reaction wood formation and its effect on wood structure is therefore fundamental to our understanding of the adaptation of trees to their environment and to the sustainable use of wood. The topics covered include: -Morphology, anatomy and ultrastructure of reaction wood -Cell-wall polymers in reaction wood and their biosynthesis -Changes in tree proteomes during reaction wood formation -The biomechanical action and biological functions of reaction wood - Physical and mechanical properties of reaction wood from the scale of cell walls to planks -The detection and characterisation of compression wood -Effects of reaction wood on the performance of wood and wood-based products - Commercial implications of reaction wood and the influence of forest management on its formation
Research and publications on the potato crop have burgeoned since the first edition of this book was published in 1978. However, the warm reception of the first edition suggested that it had a useful part to play in promoting the scientific basis for understanding and improving the yield and quality of the crop. Since the first edition was out of print and a second reprint would not have taken into account the contributions made by research over the intervening years, it became obvious that a complete revision was necessary. There was, in particular, a need to take account of the rapid extension of interest in the crop into climates and farming systems with which it has not been traditionally associa,ted. Those involved with the crop will be sadly aware that a number of contributors to the first edition are no longer with us. Their contribution to our knowledge of the crop will however be a permanent legacy of their achievement. I would like to thank all those who have contributed to the book for their willingness to cooperate in the difficult task of bringing their particular subject up to date. This is even more noteworthy for the pressure of time appears to be almost an order of magnitude higher than it was when the first edition was tackled.
Plants use resources, i.e. carbon, nutrients, water and energy, either for growth or to defend themselves from biotic and abiotic stresses. This volume provides a timely understanding of resource allocation and its regulation in plants, linking the molecular with biochemical and physiological-level processes. Ecological scenarios covered include competitors, pathogens, herbivores, mycorrhizae, soil microorganisms, carbon dioxide/ozone regimes, nitrogen and light availabilities. The validity of the "Growth-Differentiation Balance Hypothesis" is examined and novel theoretical concepts and approaches to modelling plant resource allocation are discussed. The results presented can be applied in plant breeding and engineering, as well as in resource-efficient stand management in agriculture and forestry.
This work assesses the issues facing biodiversity maintenance on tropical islands, and the impacts of biodiversity loss. The emphasis is on the Indo-West Pacific region, which includes many small islands where the biodiversity is under threat as a result of not only climate change and habitat destruction, but invasions by organisms previously absent from an island. The contributors are distinguished biodiversity scientists from inside and outside the region, and cover topics ranging from the state of conservation action in South-East Asia, the role of parks, and the status and threat to endemics, to impacts of oil and gas exploration and forest fragmentation. Issues needing still to be addressed, especially in relation to implications of biodiversity loss or change for the maintenance of ecosystem processes, are highlighted. The conclusions and case studies have lessons for all involved in the conservation of the biotas and ecosystems of islands. Previously published in Biodiversity and Conservation 19:2 2010
China has been undertaking unprecedented ecological restoration efforts to deal with its problems of soil erosion, flooding, dust storms, and habitat loss. While there have been studies of these efforts, questions remain concerning whether they have been effectively implemented, what their induced socioeconomic and ecological impacts are, and how their performance can be improved. Tackling these important questions in an integrated manner, "An Integrated Assessment of China's Ecological Restoration Programs" is extraordinary for its broad coverage and methodological rigor. It provides a substantial improvement over the conventional approach of simply reporting projects undertaken and accepting uncritically the government assessment, and thus fills an important knowledge gap of the restoration efforts being implemented upon a variety of ecosystems in China.
Plant-driven volatile organic compound (BVOC) emissions play a major role in atmospheric chemistry, including ozone and photochemical smog formation in the troposphere, and they extend the atmospheric lifetime of the key greenhouse gas, methane. Furthermore, condensation of photo-oxidation products of BVOCs leads to formation of secondary organic aerosols with profound implications for the earth's solar radiation budget and climate. Trees represent the plant life form that most contributes to BVOC emissions, which gives global forests a unique role in regulating atmospheric chemistry. Written by leading experts in the field, the focus is on recent advancements in understanding the controls on plant-driven BVOC emissions, including efforts to quantitatively predict emissions using computer models, particularly on elicitation of emissions under biotic and abiotic stresses, molecular mechanisms of volatile synthesis and emission and the role of emissions in plant stress tolerance.
Offers basic data on more than 3,600 radionuclides. Emphasizes practical application such as basic research, acheo0logy and dating, medical radiology and industrial. Balanced and informative details on the biological effects of radiation and resultant controversy. Trimmed down student version of a product that costs many times the price.
This monograph has been written in the hope that it will prove of value to medical students and clinicians, to Honours undergradu ates in appropriate branches of the natural sciences, and to repro ductive biologists in general. It would be pleasing if the text also caught the attention of veterinary undergraduates, since there is much information bearing on reproduction in domestic animals. First and foremost, however, the intended audience is a medical one, for scientific studies of human reproduction have been cata lyzed by the intense interest in procedures of fertilization in vitro. Some would judge that this very activity has narrowed our view of physiological events occurring within the Fallopian tubes. The pre sent work may therefore serve as a useful counterbalance to the overwhelming series of publications on procedures of in vitro fer tilization, and offer opportunities to those in the clinical field for extending their knowledge of the scientific background to much of the current work.
The past two decades have seen rapid advances in the technology used to produce pot plants. Glasshouses designed and orientated to give maxi mum light transmission, fully automatic heating and ventilating systems, carbon dioxide enrichment of the atmosphere, controlled photoperiods using automatic blackouts and incandescent lamps which enable plants such as chrysanthemum to be flowered at any time of the year, mist propagation techniques, chemical growth regulators which control the height of plants, automatic watering and feeding systems, etc.: these are only some of the developments which have transformed pot plant culture. There have also been many changes in the composts and systems used to grow the plants. Mineral soils, which formed the basis of the John Innes composts, are now either too expensive or too difficult to obtain in suitable quality and sufficient quantity. Consequently the grower has been forced to seek other materials such as peat, perlite, vermiculite, plastic foam, shredded bark, etc. New types of fertilizers, new methods of heat sterilization and new chemical sterilizing agents are also being used.
Thisbookisconcernedwiththewaysinwhichcropsmightbedevelopedfor soilsthatare,atthepresent,agriculturallyunproductivebecauseofexcesses and/ordeficienciesofcertainminerals. Wehaveconcentratedonsoils,rather thanonenvironmentalconditionsthatlimitproductivity,sincetherehavebeen anumberofrecenttextsdealingwithtopicssuchasdroughtandtemperature. Theaimisthatthoseworkingtoderivecropsforgrowthonthese"problem" soilsshouldbeawareofthemanydiverseavenuesthatareavailable. These comefromthedisciplinesofplantbreeding,geneticsandphysiology,andthe interfacesthataredevelopingbetweenthem. Thebackground,therequirementstofeedtheprojectedincreaseinhuman population,issetoutintheintroductorychapter. Thenextfivechaptersthen dealwiththeapproachestocropimprovement:themeritsofaconventional breedingprogramme,theimportanceofphysiologicalcharactersinmaking selections,theuseofinvitrotechniques,ofcytogenetics,andthevalueof developingnativeplantsintocropsintheirownright. Althoughsalinityisoften usedasanexample,reflectingtheresearchinterestsofmanyoftheauthors,the methodsandapproachesdescribedhavemuchwiderapplicability. Twochap- tersarethenconcernedmorespecificallywithbreedingfortolerancetoother metaltoxicitiesandwithdeficienciesandtoxicitiesofmicronutrients. Finally,in theconcludingchapter,wesummariseandfindcommongroundbetweenthe differentapproachesandpointsofview. Brighton,April1994 ANTHONYR. YEO TIMOTHY J. FLOWERS Contents Chapter1 Introduction:WorldPopulationandAgriculturalProductivity T. 1. Flowers 1. 1 HowManyPeopleAreThere? . 1 1. 2 AgriculturalRequirements. . 2 1. 2. 1 FoodRequirements...2 1. 2. 2 FoodSupply...4 1. 3 Population-CarryingCapacity...5 1. 4 HowMuchLandIsThere? . 6 1. 5 IncreasingFoodProduction . 7 References...9 Chapter2 ConventionalPlantBreedingforTolerancetoProblemSoils C. N. ChaubeyandD. Senadhira 2. 1 ScreeningTechniques . 11 2. 2 VariabilityinToleranceforSoilStresses . 14 Rice . 15 2. 2. 1 2. 3 GeneticsofToleranceforSoilStresses...16 19 2. 3. 1 GeneLocationandLinkages...CorrelatedChanges...20 2. 3. 2 2. 4 Crop-Improvement . 21 2. 4. 1 Introduction...21 2. 4. 2 PureLineandMassSelection...21 2. 4. 3 HybridisationandSelection. 23 2. 4. 3. 1 PedigreeMethod...23 2. 4. 3. 2 BulkMethod...23 BackcrossBreeding...2. 4. 3. 3 26 2. 4. 3. 4 RecurrentSelection...26 2. 4. 3. 5 RapidGenerationAdvanceProcedures...27 2. 4. 4 MutationBreeding...28 2. 4. 5 PolyploidBreeding. 28 2. 4. 6 HeterosisBreeding. 29 2. 5 Summary...29 References...29 VIII Contents Chapter3 PhysiologicalCriteriainScreeningandBreeding A. R. Yeo 3. 1 Introduction...37 3. 2 ReasonsfortheUseofPhysiologicalSelection . 38 3. 2. 1 TheComplexityofTolerance...38 3. 2. 2 ImportingTolerancefromWildRelatives . 39 3. 2. 3 MeasuringStressTolerance . 40 3. 2. 4 InteractionBetweenEnvironmentalStresses...42 3. 2. 5 LimitationstotheUseofYieldasaSelectionCriterion...42 3. 3 Salinity . 43 3. 3. 1 BasicProblems...43 SaltExclusion...44 3. 3. 2 3. 3. 3 ConditionsRequiringOsmoticAdjustment. . 45 3. 3. 4 CharacteristicsNeededinSalt-TolerantPlants . 46 3. 3. 4. 1 ControlofSaltUptake...
Forest fIres are considered a major environmental problem in many European Union Member States as well as in other parts of the world. According to a recent report of the European Commission, forest fues are a dominant feature of the landscapes of the fIve Southern European Member States - Portugal, Spain, France, Italy and Greece, and almost a half of the Community's forests have been classed as fue-risk areas. Protection from forest fues is an interdisciplinary endeavour, which needs to be addressed from both the technological and methodological point of view, and which necessitates a wide spectrum of various scientifIc disciplines. It also implies the solution of numerous practical problems (both of a generic nature and of a specifIc one) and the consideration of the characteristics of the specifIc areas in which fue fIghting is carried out. ScientifIc research is offering a major contribution to forest fIre fIghting. The European Commission (DG XII, Directorate General for Science, Research and Development) has supported since the 1980s a number of multinational research projects through its successive RTD programmes in the fIeld of the Environment.
Forest stands are thinned all over the world. Yet, there was hitherto no consistent theory which allowed deriving unambiguous conditions for thinnings as the harvest of trees prior to the rotation age. Renke Coordes closes this gap by proposing a new, more general view on the Faustmann model as the basic investment model in forest resource economics. With the introduction of mutual interdependencies between the trees growing in a stand and the opportunity to harvest trees prior to the rotation age, optimal thinning regimes can be derived and analyzed. The implications of the proposed model are thoroughly discussed against the background of practical forest management decisions. The author closes with adaptations to the problems of the management of mixed, multiple-use and uneven-aged stands and entire forests. In this way, a unified perspective on the management of forests as natural resources is offered.
The present volume contains papers developed from courses given at the International Union of Forest Research Organizations (IUFRO) Bio chemical Genetics Workshop (Working Party S.04-5) held at the Univer sity of Gottingen, Germany on July 5 through 28, 1973. The workshop was organized by Professor Robert G. Stanley and was held in memory of Professor Klaus Stern. Unfortunately, both met with untimely deaths. Professor Stanley was also instrumental in initiating the process of having the workshop proceedings published. I was asked by the workshop participants to complete this task, and I wish to acknowledge their cooperation, advice and encouragement. In addition to the courses and subsequent papers resulting from the above workshop, we have included some papers by colleagues who were unable to attend the meeting. The contents of this text may, there fore, be considered a working-manual of generally "modern" techniques that are applicable to forest genetics and breeding programs. The chapters are placed in five major categories. The first three categories follow according to classes of chemical constituents in herent to plants which are nucleic acids (DNA, RNA), primary gene products (amino acids, proteins and enzymes) and primary and secon dary metabolites (carbohydrate polymers, resins, phenolics, pigments, etc.). The fourth category is concerned with the interaction of en vironment and gene systems. Indirect selection, crossing and proto plasmic and flowering manipulation are factors covered in the fifth category."
From ugly duckling of agricultural crops to the Cinderella crop, the significance of oilseed brassicas in international trade has increased tremendously with global produc- tion having almost trebled in the past three decades. Over 13. 2% of the world's edible oil requirement is now met from this source. The stimulus for this dramatic reversal was provided by the identification of rapeseed genotypes with greatly reduced levels of nutritionally undesirable erucic acid and meal glucosinolates during the early 1960s. Since then, rapeseed breeding has been oriented towards the need to improve oil quality. Though past achievements have been impressive, greater strides are expected in upgrading productivity through the development ofF hybrids and better mobiliza- 1 tion of genetic diversity available in wild allies. Recent emphasis on cellular and molec- ular biology will help to bypass sexual constraints for genetic enrichment of crop bras- sicas, and to reduce the time frame for cultivar development. The present book was conceived to bring together critical and comprehensive reviews on research approaches, achievements and limitations to breeding better brassicas. As the book has a strong practical bias, certain topics like taxonomy, cytogenetics, etc. are dealt with in relatively lesser detail. Thus, 'Brassica crops and wild allies', edited by S. Tsunoda, K. Hinata and C. Gomez-Campa, will serve as an ideal companion book. It is a matter of immense sorrow that the senior editor, Prof. K. S.
Jointly published with INRA, Paris.
Aimed at taking the mystery out of soil science, Soils: Principles, Properties and Management is a text for undergraduate/graduate students who study soil as a natural resource. Written in a reader-friendly style, with a host of examples, figures and tables, the book leads the reader from the basics of soil science through to complex situations, covering such topics as: the origin, development and classification of soil physical, chemical and biological properties of soil water and nutrient management management of problem soils, wetland soils and forest soils soil degradation Further, the ecological and agrological functions of soil are emphasized in the context of food security, biodiversity and climate change. The interactions between the environment and soil management are highlighted. Soil is viewed as an ecosystem itself and as a part of larger terrestrial ecosystems.
As biotechnology produces an unprecedented number of new plantvarieties, automated transplant production systems offer the means for their large-scale introduction via a rapid, efficient and economic method. As labour costs increase, so will automated systems assume even greater importance. Reforestation and afforestation projects, anti-des-ertification plantings and an increasing demand for urban greenery also create enormous demands for the mass production of high quality transplants, in addition to the commercial needs of the agriculture industry. The application of engineering techniques to modern micropropagation techniques and plant production means that many tasks can be automated, especially physical manipulation and close control of the microenvironment. This volume provides overviews of the main con-cepts -- plug seedling production, micropropagation, robotization, model development, measurement and environmental control -- with an emphasis on practical considerations. Examples are drawn from flower, vegetable and forest tree species to show how disciplines such as robotics and image analysis have a part to play in plant production.
This book is the result of 14 years of collecting Entolomataceae in the native forests of Tasmania, Australia. Although initially involving only the Tasmanian residents Genevieve Gates and David Ratkowsky, who made twice- or thrice-weekly forays into the forests throughout the year, the project was subsequently joined by agaric specialist Machiel Noordeloos from the Netherlands, and by fungi photographer Michael Pilkington from the United Kingdom. The international character of the project is further evidenced by the earlier contributions of American mycologist Tim Baroni to the Tasmanian Rhodocybe species which form the basis of the chapter on the now-expanded concept of Clitopilus, and a visit of several months in 2010 by Brazilian Ph.D. candidate Fernanda Karstedt, who tested the keys to the Entoloma species. Consequently, several thousand well-annotated collections were found during this inventory and form the basis of this monographic treatment of the Entoloma and Clitopilus of Tasmania. The resulting 90 Entoloma species and 10 Clitopilus species are well documented with standardized descriptions, line drawings of fruit bodies and diagnostic microscopic characters, and, when available, with colour photographs. Thanks to the intensive search, it was possible to illustrate most species in colour. Dichotomous keys facilitate identification of the species. The species concept used is morphologically based; in several cases, however, identification to species level is supported by molecular data.
Leaf longevity is a fundamental process underlying patterns of variation in foliar phenology and determining the distinction between deciduous and evergreen plant species. Variation in leaf longevity is associated with a wide array of differences in the physiology, anatomy, morphology and ecology of plants. This book brings together for the first time information scattered widely in the botanical literature to provide a clear and comprehensive introduction to the nature and significance of variation in leaf longevity. It traces the development of ideas about leaf longevity from the earliest descriptive studies to contemporary theory of leaf longevity as a key element in the function of leaves as photosynthetic organs. An understanding of variation in leaf longevity reveals much about the nature of adaptation at the whole plant level and provides fundamental insights into the basis of variation in plant productivity at the ecosystem level. The analysis of leaf longevity also provides a process-based perspective on phenological shifts associated with the changing climate. Readers will find this an informative synthesis summarizing and illustrating different views in a readily accessible narrative that draws attention to a central but too often unappreciated aspect of plant biology. The nature and causes of seasonal patterns in the birth and death of individual plant leaves are essential to the understanding of the health of plant communities, biomes, and consequently our planet. |
You may like...
Reënboogrant Maats: Omnibus 2 (3 in 1)
Maritha Snyman, Lorraine Hattingh
Paperback
|