Download or read book Grazing Research at Northern Latitudes written by Olafur Gudmundsson and published by Springer. This book was released on 1986-08-31 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the papers, recommendations and conclusions of the Workshop on Grazing Research at Northern Latitudes held at Hvanneyri in Iceland, 5-10 August, 1985. As the name indicates, the Workshop was dedicated to the study of plant-animal interactions in ecosystems that have evolved under boreal conditions and are therefore typically fragile. The sensitivity of vast areas of northern grazing lands to the impact of grazing animals has in many areas led to irreversible plant and soil losses. However, northern areas of the world offer tremendous potential for production of red meat. One of the means of efficiently utilizing these vast rangelands is by grazing animals that are able to forage over extensive areas. This is an efficient way to convert primary production into much needed protein to help satisfy increasing requirements throughout the world. Because of increased development of the resources of the northern regions as well as the population increase in general, an increase in food production in these areas is necessary. Strengthening of agriculture in the north further helps to improve the standard of living. Since the traditional mid-latitude farming methods are not well suited to the northern conditions, it is important to develop and learn new production techniques that fit the short summers and long winters. A logical first step is to utilize the enormous grazing value of the northern areas.
Download or read book Grazing Research at Northern Latitudes written by Olafur Gudmundsson and published by Springer. This book was released on 1986-08-31 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the papers, recommendations and conclusions of the Workshop on Grazing Research at Northern Latitudes held at Hvanneyri in Iceland, 5-10 August, 1985. As the name indicates, the Workshop was dedicated to the study of plant-animal interactions in ecosystems that have evolved under boreal conditions and are therefore typically fragile. The sensitivity of vast areas of northern grazing lands to the impact of grazing animals has in many areas led to irreversible plant and soil losses. However, northern areas of the world offer tremendous potential for production of red meat. One of the means of efficiently utilizing these vast rangelands is by grazing animals that are able to forage over extensive areas. This is an efficient way to convert primary production into much needed protein to help satisfy increasing requirements throughout the world. Because of increased development of the resources of the northern regions as well as the population increase in general, an increase in food production in these areas is necessary. Strengthening of agriculture in the north further helps to improve the standard of living. Since the traditional mid-latitude farming methods are not well suited to the northern conditions, it is important to develop and learn new production techniques that fit the short summers and long winters. A logical first step is to utilize the enormous grazing value of the northern areas.
Download or read book Grasslands and Grassland Sciences in Northern China written by National Research Council and published by National Academies Press. This book was released on 1992-02-01 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes one of the most extensive grassland ecosystems and the efforts of Chinese scientists to understand it. Leading Chinese scientists attribute the decline in China's grasslands to overgrazing and excessive cultivation of marginal areas and discuss measures to limit the damage. The book gives its view on the Chinese approach to the study of grasslands and the relevance of this activity in China to global scientific concerns.
Download or read book Grazing Research written by and published by . This book was released on 1989 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Grassland Ecophysiology and Grazing Ecology written by Gilles Lemaire and published by CABI. This book was released on 2000-11-03 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents edited key papers from the International Symposium on Grassland Ecophyisiology and Grazing Ecology held in Curitiba, Brazil in August 1999. It considers how plants within grasslands respond to and are adapted to grazing animals.
Download or read book Livestock Grazing Strategies written by Janet E. Dombrowski and published by . This book was released on 1991 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Behaviour of the African Buffalo written by H.H.T Prins and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 30 years or so, research effort in behaviour and ecology has progressed from simple documentation of the habits or habitats of differ ent species to asking more searching questions about the adaptiveness of the patterns of behaviour observed; moved from documenting simply what occurs, to trying to understand why. Increasingly, studies of behav iour or ecology explore the function of particular responses or patterns of behaviour in individuals or populations - looking for the adaptiveness that has led to the adoption of such patterns either at a proximate level (what environmental circumstances have favoured the adoption of some particular strategy or response from within the animal's repertoire at that specific time) or at an evolutionary level (speculating upon what pres sures have led to the inclusion of a particular pattern of behaviour within the repertoire in the first place). Many common principles have been established - common to a wide diversity of animal groups, yet showing some precise relationship between a given aspect of behaviour or population dynamics and some particular ecological factor. In particular, tremendous advances have been made in understanding the foraging behaviour of animals - and the 'decision rules' by which they seek and select from the various resources on offer - and patterns of social organization and behaviour: the adap tiveness of different social structures, group sizes or reproductive tactics.
Download or read book Caribou Herds of Northwest Alaska 1850 2000 written by Ernest S. Burch Jr. and published by University of Alaska Press. This book was released on 2012-09-15 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: In his final, major publication Ernest S. “Tiger” Burch Jr. reconstructs the distribution of caribou herds in northwest Alaska using data and information from research conducted over the past several decades as well as sources that predate western science by more than one hundred years. Additionally, he explores human and natural factors that contributed to the demise and recovery of caribou and reindeer populations during this time. Burch provides an exhaustive list of published and unpublished literature and interviews that will intrigue laymen and experts alike. The unflinching assessment of the roles that humans and wolves played in the dynamics of caribou and reindeer herds will undoubtedly strike a nerve. Supplemental essays before and after the unfinished work add context about the author, the project of the book, and the importance of both.
Download or read book Global Change and Arctic Terrestrial Ecosystems written by Walter C. Oechel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global warming is likely to have the greatest impact at high latitudes, making the Arctic an important region both for detecting global climate change and for studying its effects on terrestrial ecosystems. The chapters in this volume address current and anticipated impacts of global climate change on Arctic organisms, populations, ecosystem structure and function, biological diversity, and the atmosphere.
Download or read book Agricultural Ecology and Environment written by B.R. Stinner and published by Elsevier. This book was released on 2012-12-02 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increased use of chemical fertilizers and pesticides in crop production has adversely affected both the environment and the agricultural economy. Not only has it led to environmental pollution, but also the increasing costs of chemical inputs and the low prices received for agricultural products have contributed to economic unprofitability and instability.The International Symposium on Agricultural Ecology and Environment was organised in order to discuss ways of achieving the goals of economically and environmentally sustainable agriculture. It is apparent that a truly multidisciplinary effort is required and for this reason the meeting was attended by authors from many different disciplines and geographical locations. Although their papers reflect a wide diversity of agroecosystem types and examples, several common themes emerge: the increased importance of biotic control of ecosystem processes in lower input systems; the key role of soil organic matter in stabilizing nutrient cycling; the importance of agricultural landscape diversity and complexity; the importance of studying ecological processes in natural and agricultural ecosystems; the critical need to integrate socio-economic and ecological approaches.
Download or read book Housing Husbandry and Welfare of Sheep and Goats written by D'Anna J. B. Jensen and published by . This book was released on 1994 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic Ecosystems in a Changing Climate written by F. Stuart Chapin III and published by Academic Press. This book was released on 2012-12-02 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: The arctic region is predicted to experience the earliest and most pronounced global warming response to human-induced climatic change. This book synthesizes information on the physiological ecology of arctic plants, discusses how physiological processes influence ecosystem processes, and explores how climate warming will affect arctic plants, plant communities, and ecosystem processes. Reviews the physiological ecology of arctic plants Explores biotic controls over community and ecosystems processes Provides physiological bases for predicting how the Arctic will respond to global climate change
Download or read book Bibliographies and Literature of Agriculture written by and published by . This book was released on 1990 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rangeland Desertification written by Olafur Arnalds and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Desertification has occurred worldwide. The biophysical and socio-economic complexity of this phenomenon has challenged our ability to categorize, inventory, monitor and repair the condition of degraded lands. One of the most important distinctions to be made in relation to land degradation is between cultivated land used for annual crop production and `rangelands'. Grazing by free-roaming livestock is the traditional primary use of the world's rangelands. However, there is growing recognition of the importance of these vast acreages for wildlife habitat, hydrology and ground water recharge, recreation and aesthetics. This text focuses on the desertification of rangelands and explores processes, problems and solutions. Chapters in the first section evaluate interactions between `natural' and human-induced disturbance regimes, thresholds, and non-linear change with respect to vegetation, hydrology, nutrients and erosion. Chapters in the second section examine socio-economic constraints and approaches for preventing and reversing degradation. The book provides a contemporary, process-oriented perspective on rangeland degradation of value to students, policy-makers and professionals alike.
Download or read book Imperfect Institutions written by Thráinn Eggertsson and published by University of Michigan Press. This book was released on 2009-10-27 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emergence of New Institutional Economics toward the end of the twentieth century profoundly changed our ideas about the organization of economic systems and their social and political foundations. Imperfect Institutions explores recent developments in this field and pushes the discussion forward by allowing for incomplete knowledge of social systems and unexpected system dynamics and, above all, by focusing explicitly on institutional policy. Empirical studies extending from Africa to Iceland are cited in support of the theoretical argument. In Imperfect Institutions Thráinn Eggertsson extends his attempt to integrate and develop the new field that began with his acclaimed Economic Behavior and Institutions (1990), which has been translated into six languages. This latest work analyzes why institutions that create relative economic backwardness emerge and persist and considers the possibilities and limits of institutional reform. Thráinn Eggertsson is Professor of Economics at the University of Iceland and Global Distinguished Professor of Politics at New York University. Previously published works include Economic Behavior and Institutions (1990) and Empirical Studies in Institutional Change with Lee Alston and Douglass North (1996).
Download or read book Evaluation of the Energy Value of Feeds for Ruminants written by and published by Nordic Council of Ministers. This book was released on 1994 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
