Tasks for Vegetation Science – serie
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81 produkter
Del 21 - Tasks for Vegetation Science
Stratification of tropical forests as seen in leaf structure
Part 2
Inbunden, Engelska, 1990
2 166 kr
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This volume is the last contribution of a series of With the present book, a further gap concern studies concerned with the plant material of one ing leaf morphology and leaf venation, as well and the same area of Venezuelan Guiana. The as some structural peculiarities of physiological importance, is closed so that an exhaustive survey studies originated through a collaboration with the forest engineer Dr. B. Rollet, the FAO expert in of bark and leaf morphology and anatomy as well forest inventory who collected the material of tree as of fruit and seed structure of the plants of a barks, leaves, fruits and seeds in Venezuelan certain well-known area is herewith given. Not Guiana around the "Rio Grande", "EI Paraiso", only were hundreds of species studied, but and "EI Dorado" camps. In the first place, tree structural characteristics were related to "forest barks of about 280 species of dicotyledons stratification", i. e. to the different micro climatic belonging to 48 families were studied (family by conditions in the forest, as the height of the trees family) by Roth in separate publications which and shrubs studied was known. It is of common mainly appeared in Acta Botanica Venezuelica knowledge that in the lower forest layers, light is a and in Acta Biol6gica Venezuelica (see the bibli limiting factor, while humidity is sufficiently avail ography in Roth 1981).
Inbunden, Engelska, 1990
2 166 kr
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Many aspects of phytogeography have gained loped numerical techniques which allow the com greatly from the recent development of analytical bination of quantitative floristic and vegetational and numerical methods. The new methods have analyses with mapping and causal or evolu opened up new avenues of research, leading to a tionary deductions. The papers selected for the better understanding of the distribution and book show approaches for higher and lower plant evolutionary patterns of species and communities. forms. Several papers dealing with relevant in During the 1987 Botanical Congress in Berlin, formation on vegetation for the respective areas Drs Nimis and Haeupler organized a symposium appear for the first time. The combination of in which examples of present-day phytogeogra new approaches successfully applied to new phic work were discussed. After the symposium problems should be very stimulating to young it was agreed that a proceedings volume should scientists as many papers demonstrate how to be edited by Drs Nimis and Crovello. From the make efficient use of the new developments in lectures presented, those dealing primarily with information science for species-oriented phyto numerical methods were selected for the book. geography. This is the second volume of the T: VS series that While the book does not intend to serve as a deals with new aspects and methods of phyto textbook, it can be viewed as a guide to the geography.
Inbunden, Engelska, 1990
1 626 kr
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This book contains papers on the topics of brought together wetland SCientists from all wetland ecology and management, most of continents and provided an opportunity to exchange valuable information on a variety of which were presented at the 2nd International Wetlands Conference in Trebon, Czechoslovakia aspects on the ecology and management of wetlands. (13-22 June 1984). The conference, hosted by the Hydrobotany Department of the Institute of Botany, was organized by the Czechoslovak This volume contains papers that represent aspects of wetland management. Like most Academy of Sciences and the International ecological topics, the papers clearly Wetlands Working Group of the International Association of Ecology (INTECOL) with demonstrate that the science of wetland management is not evenly developed around the cooperation from the SCOPE (SCientific Committee on Problems of the Environment) world. In some areas, wetlands have not even Working Group on Ecosystem Dynamics in been adequately described and there is little Freshwater Wetlands and Shallow Water Bodies, information about the impacts that man is UNESCO Man and the Biosphere (MAB) having on them. In other areas, information on Program, International Society for Ecological wetland ecology and management has developed Modelling, and the International Society for to the point where regulations and laws provide Limnology (SIL). Partial sponsorship for the some protection against development. It is our conference and these proceedings was provided hope this collection of papers will demonstrate by UNESCO (Contract SCjRPj204. 079.
Häftad, Engelska, 1991
2 166 kr
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This book is the synthesis of research on the and preparation of the book. Professor J. B. Falinski and his co-workers substantially helped dynamics of vegetation conducted in the Bialo- in organizing the study area and providing finan- wieia Primeval Forest (North-Eastern Poland), following the first book on this subject published cial support in the course of field work. in 1986 by Dr W. Junk Publishers as volume 8 in I gratefully thank Professor K. Zarzycki for his the Geobotany series [Falinski J. B. (with the unfailing support and help in these long-term assistance of K. Faliriska), Vegatation Dynamics in studies and for financing the studies with the Temperate Lowland Primeval Forests. Ecological grant, CPBP 04.04.B. The final stages of prepara- Studies in Bialowieia ForestJ. Like the first book, tion of this book (graphics and translations) were this one resulted from the work of the Bialowieza financed by the grant CPBP 04.10.07. I am grate- Geobotanical Station of Warsaw University and ful to Professors A. Szujecki and R. Andrzejewski for the administering of the grant.
Inbunden, Engelska, 1992
3 246 kr
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The symposium on high salinity tolerant plants, held at the University of Al Ain in December 1990, dealt primarily with plants tolerting salinity levels exceeding that of ocean water and which at the same time are promising for utilization in agriculture or forestry. The papers of the proceedings of this symposium have been published in two volumes. This volume (1) deals with mangroves and inland high salinity tolerant plants and ecosystems and is divided into the following categories: 1. Vegetation analyses and descriptions of mangroves; 2. Ecosystem analyses; 3. Physiological analyses; 4. Utilization of mangroves and salt-marsh plants; 5. Soil and water analyses. Volume 2 deals with the improvement of salinity tolerance for traditional crops under marginal soils and irrigation water and is published in "Tasks for Vegetation Science" series (TAVS) Vol. 28.
Inbunden, Engelska, 1993
2 166 kr
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The Symposium on high salinity tolerant plants, held at the University of Al Ain in December 1990, dealt primarily with plants tolerating salinity levels exceeding that of ocean water and which at the same time are promising for utilization in agriculture or forestry. These plants could be very useful for a country like the UAE where fresh water resources are very scarce and the groundwater available at some places is already very salty. More than 60 million woody trees/shrubs have been planted so far and more are planned for the inland plains underlain with brackish groundwater. These species were no solution for the widely barren shoreline of the UAE. Here mangrove species were of potential use, and one species, Avicennia marina, occurs widely and has been successfully planted for about a decade. Converting the tree plantations into economically useful cropping systems is still a problem requiring much research and development. The book deals in several sections with conventional irrigations systems using marginal water. The species used in these systems are mostly hybrids of conventional crops.The irrigation systems, however, have similar problems as may be expected for irrigation with seawater. Papers show the participants' experiments in this area. The volume serves as a link between scientists working for the improvement of classical irrigation systems and those interested in the application of a new dimension of salinity levels for irrigation water.
Inbunden, Engelska, 1993
2 166 kr
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This book is based on more than 1000 references to English and French articles produced in the region over many decades. A comprehensive review of the achievements in farming and research in both wet- and dryland is given, related to the grassland of: Eastern Africa, extending from Malawi to Eritrea, including Ethiopia, Kenya, Uganda, Tanzania, Somalia, Zambia, Rwanda, Burundi, Sudan and Eastern Zaire; sown grasses, within the time-proven system of mixed-farming based on crop-grass rotations;
Inbunden, Engelska, 1993
2 166 kr
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The destruction of the tropical forests continues rapidly. We all know that this has global, ecological and economic consequences. The problem is of such magnitude that it can only be compared to warfare. The destruction of tropical forests is not only detrimental to the global ecology but also poses a serious threat to the people living in these areas. Furthermore, the overutilization of such a valuable resource poses a serious threat to the next generations. Besides the problem generated for the people in these regions, and for the earth in general, there is a moral obligation to preserve the vast biological diversity in the tropical forests. We have a commitment to all species on earth as well as man and, therefore, need to preserve as many as possible, if not all. This book discusses the problem from different angles: from forestry, ecology and nature conservation. The two main problem areas are: first the wise utilization of that portion of the forest which will be used especially the introduction of planned forestry in such areas and second the development of a good plan for nature conservation in the tropics.
Inbunden, Engelska, 1994
870 kr
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This volume comprises invited contributions on aspects of plant-animal interactions in Mediterranean-type ecosystems, which was the subject of the Sixth International Conference on Mediterranean Climate Ecosystems held in Crete, Greece, from September 23 - 27, 1991. The subject of plant-animal interactions is fundamental to the Mediterranean-type ecosystems and their rational management. All five regions of the world with a Mediterranean climate are represented: the Mediterranean basin, California, Chile, South Africa and Australia. The book is divided into six parts, which reflect trends in the research of the members of the International Society of Mediterranean Ecology (ISOMED).
Del 32 - Tasks for Vegetation Science
Halophytes as a resource for livestock and for rehabilitation of degraded lands
Inbunden, Engelska, 1994
2 166 kr
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Desertification (land degradation in arid, semi-arid and dry sub-humid areas resulting mainly from adverse human impacts) is the main environmental problem of dry lands, which occupy more than 40 per cent of the total global land area. The phenomenon threatens about 3.6 billion hectares and currently affects the livelihood of about 900 million people. Thl! world is now losing annually about 1.5 million hectares of total irrigated lands (240 million hectares) due mostly to salinization, mainly in drylands. Salt affected soils are widely distributed throughout the arid and semi-arid regions, and particularly severe in China (7 million ha), India (20 million ha), Pakistan (3.2 million ha), USA (5.2 million ha), as well as Near East, southern Europe and elsewhere. Demands on production have increased the pressure on existing productive land and moved the limits of production onto increasingly marginal lands. Wise land-use practices have yet to be developed for such conditions. The Executive Director of UNEP reported to the Governing Council in February 1992 concerning the "Status of Desertification and Implementation of the United Nations Plan of Action to Comtat Desertification (PACD)". The Report concludes that major efforts to implement the PACD had gJne into supporting measures rather than concrete corrective field operations. Little evidence of progrl!ss was found in irrigated croplands, rainfed croplands or rangelands. It was recommended that every piece of land should be used in keeping with its ecological characteristics, natural capabilities and constraints.
Inbunden, Engelska, 1996
1 626 kr
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Forest vegetation is distributed in monsoon Asia continuously from boreal forests through temperate to tropical rain forests. This vegetation - the richest in the world - is being subjected to global change on an unprecedented scale. It has been predicted that boreal forests will experience the most significant change in response to global warming, while tropical forests are endangered by rapid changes in land use due to high population pressure. An increase in atmospheric CO2 concentration will severely affect ecosystem function in this area. This volume presents a review of terrestrial ecosystems in monsoon Asia and assesses possible effects of global change on the structure and function of forest ecosystems and feedback routes to the global carbon cycle. Audience: Vital reading for plant ecologists, vegetation scientists, environmental managers and government decision makers.
Inbunden, Engelska, 1999
1 626 kr
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This volume investigates biodiversity on the coenosis and landscape levels. Phytosociological and animal-ecological fields are considered, as well as theoretical approaches to biodiversity and aspects of its application in nature and landscape protection and preservation. Since biodiversity has so far been predominantly studied in the Anglo-American area, the author has discussed this complex topic from a central and southern European viewpoint, based on data gathered in these regions, to promote a global discussion.
Inbunden, Engelska, 2001
1 626 kr
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This volume contains a selection of 14 articles dealing with different aspects of biomonitoring and their relation to questions of global change. During the last 10 - 15 years, vegetation changes due to various causes have been more intensively studied in biological and environmental sciences. Especially aspects of global warming lead to a great variety of tasks for vegetation science (see e.g. the articles by Grabherr, Gottfried & Pauli; Carraro, Gianoni, Mossi, KlOtzli & Walther; Walther; Defila; Stampfli & Zeiter; Rothlisberger; Burga & Perret and Moller, WUthrich & Thannheiser). The different aspects of applied biomonitoring related to (possible) environmental changes concern various ecosystems, e.g. Central European beechwoods, Insubrian evergreen broad-leaved forests, thermophilous lowland deciduous forests, dry grasslands of the lower montane belt of the Ticino Alps, alpine mountain peaks of Switzerland and Austria, Swiss alpine timberline ecotones, and high arctic tundra vegetation. The volume is divided into three parts: A. General aspects of biomonitoring (contributions by KlOtzli; Wildi and Labasch & Otte) , B.Examples of applied biomonitoring in Germany and Switzerland (articles by Hakes; Herpin, Siewers, Kreimes & Markert; Defila; Stampfli & Zeiter; Rothlisberger and Ruoss, Burga & Eschmann), and C. Aspects of global change in the Alps and in the high arctic tundra (Grabherr, Gottfried & Pauli; Burga & Perret; Carraro, Gianoni, Mossi, KlOtzli & Walther; Walther and Moller, WUthrich & Thannheiser).
Häftad, Engelska, 2001
1 626 kr
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This volume does not aim at merely adding to the vast and increasing number of individual publications on `biodiversity'. Rather it is our objective to investigate biodiversity on the previously little studied coenosis and landscape levels. Phytosociological and animal-ecological fields are considered, as well as theoretical approaches to biodiversity and aspects of its application in nature and landscape protection and preservation. Since biodiversity has so far been predominantly studied in the Anglo-American area, it seemed to be of value to discuss this complex topic from a central and southern European viewpoint, based on data gathered in these regions, and thus to promote a global discussion.
Inbunden, Engelska, 2002
2 166 kr
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Research on sabkha (sand flat) ecology commenced only in the latter half of the 20th century, previously sabkhat were considered as wasteland. However, contemporary environmental managers realize that sabkhat are ecosystems with a research, development, and conservation value. This multidisciplinary volume is a comprehensive documentation of sabkha research in the Arabian peninsula region, including contributions from 16 countries. Topics covered include: aspects of geology; hydrology; geomorphology; zoology; botany; ecology; ecosystem analysis; past; present and future land use methods and development; and nature conservation at the landscape level.
Inbunden, Engelska, 2002
2 166 kr
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Saline land is a resource capable of significant production. Recent advances in research in breeding for salt tolerance in wheat, biotechnology in rice, and selection and rehabilitation of salt-tolerant plants are of economic importance in arid/saline conditions.This book gives some practical approaches for saline agriculture and afforestation, and describes examples of cultivating salt-tolerant/halophytic plants for commercial interest on salt-affected land or with highly salinized water in Australia, China, Central Asia, Egypt, Pakistan, and Russia. It also explores the possibilities of arid/saline agriculture and afforestation in UAE.
Inbunden, Engelska, 2004
2 166 kr
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This volume is a landmark in the development of the of pilot plantations in order to demonstrate the eco halophyte ecology research and development for the logical sustainability and the economic feasibility of saline irrigated production systems. following reasons: This book is intended to provide starting points for 1. The volume brings together contributions from work at several levels of research from physiology many countries from which otherwise little infor through chemistry and practical applications to taxon mation is available in the international literature. omy and floristic analyses. The volume is structured in this way and shows the different approaches possible 2. The volume summarises through individual con in different parts of the world limited by the interest of tributors the state of research possibilities in many the local scientists, laboratory and monetary resources developing countries. available or suggested by the type of information 3. The volume documents the latest work by the mem needed for further studies. bers of the European Union's Concerted Action Towards the end of this book we report on the initi Group "Sustainable utilisation of halophytes in the ation of the new scientific society dealing with the Mediterranean and subtropical dry regions". problems to be solved to create new cash crop halo phytes which is very much needed for the immediate 4. The volume reports contributions from the work future in many developing countries with desert or shop held at the beginning of the EXPO 2000, semi desert climates.
Del 40 - Tasks for Vegetation Science
Ecophysiology of High Salinity Tolerant Plants
Inbunden, Engelska, 2005
2 166 kr
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The halophytes are highly specialized plants, which have greater tolerance to salt. They can germinate, grow and reproduce successfully in saline areas which would cause the death of regular plants. Most halophytic species are found in salt marsh systems along seashores or around landlocked inland lakes and flat plains with high evaporation. The halophytes play very significant role in the saline areas specially in the coast by overcoming the salinity in different ways, viz. with regulating mechanisms in which excess salts are excreted and with out regulating mechanism, which may include succulents or cumulative types. Besides that they protect coast from erosion and cyclones, provide feeding ground and nursery for fish, shrimps and birds. Halophytes get increasing attention today because of the steady increase of the salinity in irrigation systems in the arid and semi-arid regions where the increasing population reaches the limits of freshwater availability. In many countries, halophytes have been successfully grown on saline wasteland to provide animal fodder and have the potential for rehabilitation and even reclamation of these sites. The value of certain salt-tolerant grass species has been recognized by their incorporation in pasture improvement programs in many salt affected regions throughout the world. There have been recent advances in selecting species with high biomass and protein levels in combination with their ability to survive a wide range of environmental conditions, including salinity.
Del 41 - Tasks for Vegetation Science
Plants and Climate Change
Inbunden, Engelska, 2006
1 626 kr
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Plants and Climate Change focuses on how climate affects or affected the biosphere and vice versa both in the present and past. The chapters describe how ecosystems from the Antarctic and Arctic and from other latitudes respond to global climate change.The papers highlight plant responses to atmospheric CO2 increase, to global warming and to increased ultraviolet-B radiation as a result of stratospheric ozone depletion.Depending on how and how well plant responses to increased temperature, atmospheric CO2 and ultraviolet-B have been preserved in the (sub)-fossil record, past climates and past atmospheric chemistry may be reconstructed. Pollen and tree-ring data reflect plant species composition and variation of temperature and precipitation over long or shorter time intervals. In addition to well preserved morphological and chemical plant properties, new analytical techniques such as stable isotopes are becoming increasingly important in this respect. The development and validation of such biotic climate and environment proxies build a bridge between biological and geological research. This highlights that plant-climate change research is becoming a multi- and transdisciplinary field of relevant research.
Del 42 - Tasks for Vegetation Science
Sabkha Ecosystems
Volume II: West and Central Asia
Inbunden, Engelska, 2006
1 626 kr
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Sabkha Ecosystems Volume I: The Arabian Peninsula and Adjacent Countries was published in 2002. It was the first comprehensive volume dealing with the subject of sabkha research, and sabkha environmental management. Valuable new information was provided for the sabkha of numerous countries on and adjacent to the Arabian Peninsula. This new volume now follows up on this important process, and provides data and information on salt desert ecosystems of numerous West and Central Asian countries, including many of which are located in the Arabian Peninsula. The information provided assists the reader to better understand sabkha geology, hydrology, geomorphology, zoology, botany, ecology, ecosystem functioning, as well as sabkha conservation, utilisation, and development. The volume is paramount literature for anyone dealing with sabkha research and development.
Inbunden, Engelska, 2008
1 626 kr
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Focusing on Venezuela and Mexico, this edited volume from the International Society of Halophyte Utilisation (ISHU) explores the environmental issues facing South and Central America's coastal ecosystems, and discusses the uses of mangrove species and other halophytes in addressing issues of both coastal pollution and upland soil salinisation.The book draws on expertise from Europe and South America to present a series of case studies that detail Venezuela’s saline ecosystems and examine the economic potential of mangrove restoration and halophyte production. It includes cutting-edge research into the establishment of new mangrove stands which could serve as prototypes for the sustainable use of halophytes, including Chenopodium quinoa and Tamarix aphylla. Moreover, the detailed examples from Venezuela and other Caribbean countries provide useful models for comparison with halophyte utilisation in other parts of the world – especially the Mediterranean region, where much of the earlier research of the ISHU had been conducted.Including insights from 50 years of research on the Venezuelan coastline this unique book provides a useful reference for researchers working on saline ecosystems and economically useful halophytes around the world.
Inbunden, Engelska, 2008
1 626 kr
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Salinity and water stress limit crop productivity worldwide and generate substantial economic losses each year, yet innovative research on crop and natural resource management can reveal cost-effective ways in which farmers can increase both their productivity and their income.Presenting recent research findings on salt stress, water stress and stress-adapted plants, this book offers insights into new strategies for increasing the efficiency of crops under stressful environments. The strategies are based on conventional breeding and advanced molecular techniques used by plant physiologists, and are discussed using specific case studies to illustrate their potential. The book emphasizes the effects of environmental factors on specific stages of plant development, and discusses the role of plant growth regulators, nutrients, osmoprotectants and antioxidants in counteracting their adverse affects.Synthesising updated information on mechansisms of stress tolerance at cell, tissue and whole-plant level, this book provides a useful reference text for post graduate students and researchers involved in the fields of stress physiology and plant physiology in general, with additional readership amongst researchers in horticulture, agronomy, crop science, conservation, environmental management and ecological restoration.
Del 40 - Tasks for Vegetation Science
Ecophysiology of High Salinity Tolerant Plants
Häftad, Engelska, 2008
2 166 kr
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The halophytes are highly specialized plants, which have greater tolerance to salt. They can germinate, grow and reproduce successfully in saline areas which would cause the death of regular plants. Most halophytic species are found in salt marsh systems along seashores or around landlocked inland lakes and flat plains with high evaporation. The halophytes play very significant role in the saline areas specially in the coast by overcoming the salinity in different ways, viz. with regulating mechanisms in which excess salts are excreted and with out regulating mechanism, which may include succulents or cumulative types. Besides that they protect coast from erosion and cyclones, provide feeding ground and nursery for fish, shrimps and birds. Halophytes get increasing attention today because of the steady increase of the salinity in irrigation systems in the arid and semi-arid regions where the increasing population reaches the limits of freshwater availability. In many countries, halophytes have been successfully grown on saline wasteland to provide animal fodder and have the potential for rehabilitation and even reclamation of these sites. The value of certain salt-tolerant grass species has been recognized by their incorporation in pasture improvement programs in many salt affected regions throughout the world. There have been recent advances in selecting species with high biomass and protein levels in combination with their ability to survive a wide range of environmental conditions, including salinity.
Inbunden, Engelska, 2019
1 626 kr
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This book is the sixth and final volume in the Tasks for Vegetation Science book series, and it concludes the most comprehensive scientific documentation dealing with hypersaline ecosystems of the world.
Inbunden, Engelska, 2016
1 626 kr
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This book is a part of the Sabkha Ecosystems series which was designed to provide information on sabkha ecosystems of different regions and to add to the collective knowledge available about saline ecosystems. The comprehensive coverage assists the reader gaining a thorough understanding of sabkha geology, hydrology, geomorphology, zoology, botany, ecology and ecosystem functioning, as well as sabkha conservation, utilization and development. Volume I focused on The Arabian Peninsula and Adjacent Countries, volume II was based on describing saline ecosystems of West and Central Asia , volume III referred to Africa and Southern Europe, while volume IV focused on Cash Crop Halophyte and Biodiversity Conservation. The present volume V focuses on Americans.
Häftad, Engelska, 2018
1 626 kr
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This book is a part of the Sabkha Ecosystems series which was designed to provide information on sabkha ecosystems of different regions and to add to the collective knowledge available about saline ecosystems. The comprehensive coverage assists the reader gaining a thorough understanding of sabkha geology, hydrology, geomorphology, zoology, botany, ecology and ecosystem functioning, as well as sabkha conservation, utilization and development. Volume I focused on The Arabian Peninsula and Adjacent Countries, volume II was based on describing saline ecosystems of West and Central Asia , volume III referred to Africa and Southern Europe, while volume IV focused on Cash Crop Halophyte and Biodiversity Conservation. The present volume V focuses on Americans.
Del 45 - Tasks for Vegetation Science
Chemical Elements in Plants and Soil: Parameters Controlling Essentiality
Inbunden, Engelska, 2009
1 626 kr
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Earlier works on plant essential elements have revealed a series of complicated, counter-intuitive relationships among various chemical elements in different plant species, due to both unlike usage of certain elements in plants and to different carriers effecting resorption and transport.In an attempt to provide a more coherent theory behind plant mineral nutrition, this groundbreaking book adopts a very different approach from the existing literature, presenting an explanation of the essentiality of chemical elements in biological systems and the application of stoichiometric network analysis (SNA) to the biological system of elements. Starting with data from biochemical environmental analysis, and a discussion of the phenomena involved in metal ion partition and autocatalytic behaviour, conditions and criteria controlling the partition of metals into biomass are investigated. Several rules are derived and investigated in terms of their interaction both in comparisons among contemporary organisms and in terms of evolution. This allows the construction, for example of a map which directly traces the biological feature of essentiality to parameters of coordination chemistry.The book will have worldwide appeal for researchers interested in fields such as soil/plant interactions, bioinorganic chemistry, plant nutrition, phytomining, bioremediation, biogeochemistry, nutrient cycling, soil chemistry, and cellular physiology.
Häftad, Engelska, 2011
2 166 kr
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The series Tasks for Vegetation Science is devoted to a variety of research aspects in vegetation science, pure as wellas applied. Of the applied problems one of the most pressing is to achieve better knowledge and improvement of the pasture vegetation in tropical and subtropical regions. As series editor I was impressed by the sheer volume of useful scientific information concerning pasture plants from East Africa collected during many years by Dr. Boonman and compiled in one manuscript. Dr. Boonman first came to East Africa in 1963 on an overland journey along the river Nile which took him from Alexandria in Egypt to Lake Victoria in Uganda and Kenya and back again. After a brief spell as a cotton agronomist in the Sudan Gezira he joined the grassland research team at Kitale, Kenya in 1966. Improvement ofseed yield oftropical grasses was his principal interest which finally led him into the fieldof breeding grasses. Well-known varieties from his work include Boma & Elmba Rhodesgrass as wellas Clone 13Elephantgrass. In 1979he was recalled to The Netherlands to head a cooperative seedcompany involved in the breeding of grasses and cereals. The author has focused this study on one region, Eastern Africa.Global application of theories runs into conflicts too easily with local types of farming, if not with bare economics. Very few books can be found that describe existing practices and seek local answers by digging deep in the stacks of old, local reports.
Häftad, Engelska, 2010
2 166 kr
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The destruction of the tropical forests proceeds Nobody at the symposium believed that the rapidly. We all know that this has global ecologi tropical forest area would remain untouched. cal and economical consequences. The problem The population explosion takes care of that argu is of such magnitude that it can only be com ment. The two main problem areas before us are pared to warfare. The destruction of tropical first the wise utilization of that portion of the forests is not only detrimental to the global forest which will be used - especially the intro ecology but also poses a serious threat to the duction of planned forestry in such areas, and people living in this area. Furthermore the over second, the development of a good plan for utilization of such a valuable resource poses a nature conservation in the tropics. serious threat to the next generations. The papers presented at the symposium will Apart from the problem generated for the most certainly not solve all the problems but we people in those regions and on earth in general hope they contribute to the very much needed, there is a moral obligation to preserve the vast continued discussion of possible solutions which biological diversity in the tropical forests. We must be implemented in the near future.
Häftad, Engelska, 2010
1 626 kr
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This volume contains a selection of 14 articles dealing with different aspects of biomonitoring and their relation to questions of global change. During the last 10 - 15 years, vegetation changes due to various causes have been more intensively studied in biological and environmental sciences. Especially aspects of global warming lead to a great variety of tasks for vegetation science (see e.g. the articles by Grabherr, Gottfried & Pauli; Carraro, Gianoni, Mossi, KlOtzli & Walther; Walther; Defila; Stampfli & Zeiter; Rothlisberger; Burga & Perret and Moller, WUthrich & Thannheiser). The different aspects of applied biomonitoring related to (possible) environmental changes concern various ecosystems, e.g. Central European beechwoods, Insubrian evergreen broad-leaved forests, thermophilous lowland deciduous forests, dry grasslands of the lower montane belt of the Ticino Alps, alpine mountain peaks of Switzerland and Austria, Swiss alpine timberline ecotones, and high arctic tundra vegetation. The volume is divided into three parts: A. General aspects of biomonitoring (contributions by KlOtzli; Wildi and Labasch & Otte) , B.Examples of applied biomonitoring in Germany and Switzerland (articles by Hakes; Herpin, Siewers, Kreimes & Markert; Defila; Stampfli & Zeiter; Rothlisberger and Ruoss, Burga & Eschmann), and C. Aspects of global change in the Alps and in the high arctic tundra (Grabherr, Gottfried & Pauli; Burga & Perret; Carraro, Gianoni, Mossi, KlOtzli & Walther; Walther and Moller, WUthrich & Thannheiser).