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Books > Earth & environment > Geography > Physical geography
Hotspots are enigmatic surface features that are not easily explained in the framework of plate tectonics. Investigating their origin is the goal of this thesis, using field evidence collected in the Cape Verde Islands, a prominent hotspot archipelago in the eastern Atlantic Ocean. The approach taken is to document uplift of the islands relative to sea level and use the uplift features to test various models of hotspot development. Island uplift is thought to arise from the growth of the anomalously shallow seafloor on which the islands rest, known as the bathymetric swell, which is characteristic of hotspots. The work comprises a geological summary and detailed mapping of paleo sea level markers on Cape Verde. Isotopic dating of the markers shows that uplift on the islands over the last 6 Myr is up to 400 m, and that the uplift chronology varies among islands. Two processes act to raise the Cape Verde Islands. The dominant process is one that is local to individual islands. The regional, swell-related component is smaller, and possibly episodic. The observations provide strong constraints on swell development and on hotspot models.
The mystique of the rainforest has captured the imaginations of generations of young people, explorers, authors, and biologists. It is a delicate ecosystem whose myriad sounds and smells, whose vibrancy of life, is balanced by constant cycles of death and decay. It is a place of fierce competition where unusual partnerships are forged and creative survival strategies are the norm. In this book, you will meet the scientific pioneers who first attempted to quantify and understand the vast diversity of these tropical forests, as well as their successors, who utilize modern tools and technologies to dissect the chemical nature of rainforest interactions. This book provides a general background on biodiversity and the study of chemical ecology before moving into specific chemical examples of insect defenses and microbial communication. It finishes with first-hand accounts of the trials and tribulations of a canopy biology pioneer and a rainforest research novice, while assessing the state of modern tropical research, its importance to humanity, and the ecological, political, and ethical issues that need to be tackled in order to move the field forward.
This Brief deals with the reconstruction of Holocene paleoenvironment in the central part of Bangladesh in relation to relative sea-level (RSL) changes which is 200 km north from the present coastline. Lithofacies characteristics, mangal peat, diatom and paleophysiographical evidences were considered to reconstruct the past position and C-14 ages were used to determine the time of formation of the relative sea-level during the Holocene. With standard reference datum the required m.s.l. at the surface of five sections are calculate and the RSL curve suggests that Bangladesh has experienced two mid Holocene RSL transgressions punctuated by regressions. The abundant marine diatom and mangrove pollens indicates that the highest RSL transgression in Bangladesh is around 6000 cal BP which is attained at least 4.5 to 5m higher than the modern m.s.l. After this phase, the relative sea-level started to fall and consequently a freshwater peat developed around 5980 5700 cal BP. The abundant mangrove pollens in salt-marsh succession shows the regression around 5500 cal BP and, the height was 1 2 m higher than the modern sea level. These and more interesting findings are discussed in this Brief.
With increased climate variability, aggravated natural hazards in the form of extreme events are affecting the lives and livelihoods of many people. This work serves as a basis for formulating a 'preparedness plan' to ensure the effective policy formulation for planned development. Increased demand and competition with a high degree of variability have forced people to struggle in order to prosper. Good governance and innovative policy formulation are necessary to create a resilient society. This may promote a paradigm shift in the mindset on and perceptions of natural hazards and their impacts on development and growth. This new perspective will make people more concerned about minimizing the loss of life, property, and environmental damage and directly safeguard the development process. This book presents a detailed methodological approach to monitoring meteorological, hydrological, and climate change aspects to help resolve issues related to our environment, resources, and economies in the changing climate situation.
Reports of natural disasters fill the media with regularity. Places in the world are affected by natural disaster events every day. Such events include earthquakes, cyclones, tsunamis, wildfires - the list could go on for considerable length. In the 1990s there was a concentrated focus on natural disaster information and mitigation during the International Decade for Natural Disasters Reduction (IDNDR). The information was technical and provided the basis for major initiatives in building structures designed for seismic safety, slope stability, severe storm warning systems, and global monitoring and reporting. Mitigation, or planning in the event that natural hazards prevalent in a region would suddenly become natural disasters, was a major goal of the decade-long program. During the IDNDR, this book was conceptualized, and planning for its completion began. The editors saw the need for a book that would reach a broad range of readers who were not actively or directly engaged in natural disasters relief or mitigation planning, but who were in decision-making positions that provided an open window for addressing natural disaster issues. Those people were largely elected public officials, teachers, non-governmental organization staff, and staff of faith-based organizations. Those people, for the most part, come to know very well the human and physical characteristics of the place in which they are based. With that local outreach in mind, the editors intended the book to encourage readers to: 1.
In Chapter 1 the methodological principles of systemization and visualization of multidimensional ecological information for its operational dissemination among potential users are stated. Their realization results in creation of the geographic-and ecologic model of marine basin as an information base for diagnosis of the marine ecosystem state, estimation of consequences of economic activity, and modelling of its changes with the use of mathematical tools. In Chapter 2 the geographic-and-ecological aspects of mathematical modelling of marine ecosystems, the possibilities and peculiarities of the most adequate models, the Russian hydrodynamic model of oil spills "SPILLMOD" and hydroecological model of organogenic compound transformation in the sea, are investigated. In the following six Chapters the examples of practical realization of geographic-and-ecological (as information source) and mathematical (as computing apparatus) modelling at the investigations of specific ecological problems associated with consequences of natural hazards and economic activity on aquatory and within the whole Black Sea basin are given. "
The story of the Snowdonia National Park and the Society, dedicated to conserving and enhancing its unique landscape, is one which will fascinate and inform those who live and work within it as well as being of interest to visitors, be they picnickers or sightseers or committed hill walkers, climbers, canoeists and mountain bikers. This book commemorates the fortieth anniversary of the Snowdonia Society and is a record of its sometimes turbulent history and the ever-changing but still inspiring landscape of the National Park. Created in 1951, the Snowdonia National Park is a landscape of rugged grandeur, great natural diversity and cultural associations going back thousands of years. The vision of its founders was that this very special region should be protected from harmful development for all time. From the beginning, however, there were problems? Out of these difficulties grew the idea of an independent society dedicated to conserving and enhancing the landscape. Today the Snowdonia Society has a membership of over 2,500 and has a close working relationship with both the Snowdonia National Park Authority and the Council for National Parks. This lively narrative chronicles the story of the Snowdonia Society ? its successes and failures, its internal conflict and the personalities involved ? as well as discussing the wider issues which have affected this unique landscape over the last forty years. This lavishly illustrated book will appeal to anyone who loves the rugged landscape of Snowdonia, published in dual language text of English and Welsh.
This volume explores the yellow-brown seaweed species attributed to the class Tribophyceae. The description of each species incorporates notes on ecology and distribution and many are supported by line illustrations. This is a reprint edition of ISBN 0113100043 published in 1987.
Academics and practitioners from across Asia and beyond revisit the issues and impact of climate change in Asia. They examine the preconditions for good governance regarding climate change, and the role of state and non-state actors in climate change governance, and explore different political-legal frameworks.
The Middle East region holds the world's largest oil and natural gas proven reserves. Several Middle Eastern States are major oil producers and consumers. Given price fluctuations and environmental concerns many countries have sought to diversify their energy mix. The Middle East is no exception. Gawdat Bahgat analyzes the geopolitical, economic and strategic forces behind this diversification in the Middle East. He highlights the main advantages and disadvantages of each source of energy.
Researchers and practitioners explore the effect of evolving global economic and political powers on energy security within the UK and puts forward practical options for moving towards a more energy secure system over both the short and long terms.
From climate change over shale gas to the race for the Arctic, energy makes headlines in international politics almost daily. Thijs Van de Graaf argues that energy is in dire need of global governance. He traces the history of international energy cooperation from the notorious 'Seven Sisters' oil-companies cartel to the recent creation of the International Renewable Energy Agency (IRENA). He analyses how international institutions have been created for securing oil rents, coordinating consumer-countries' energy security policies, promoting producer-consumer dialogue, managing regional gas markets, and dealing with energy-related environmental externalities. Drawing on the emerging regime complexity literature, he constructs a novel analytical framework to explain the fragmented architecture of global energy governance, and studies prospects for institutional reform at the International Energy Agency (IEA) and the G8/G20.
In the advent of important crises of both climate change and energy supply (in)security, questions are being asked about changes in energy governance. Caroline Kuzemko explains how and why change takes place and discusses the convoluted UK energy governance system that has emerged between 2000 and the present day. She applies a complex theoretical approach based on new institutional concepts of policy paradigm change, but which also utilises concepts of (de)politicisation and securitization. UK energy governance, like energy policy elsewhere, is moving from one heavily influenced by neoliberal economic ideas to one where state intervention is more commonplace. Moreover, the new governance system is informed not by one but by multiple perspectives on energy and governance geopolitical, climate change and pro-market.
Beth Edmondson and Stuart Levy examine why it is so difficult for the international community to respond to global climate change. In doing so, they analyse and explain some of the strategies that might ultimately provide the foundations for appropriate responses.
It is an honor and pleasure for me to write the foreword of this book comprising the of Forest Resources for proceedings of the Fourth Symposium on the Improvement Recyclable Forest Products. The symposium was organized by Dr. Toshihiro Ona, Associate Professor at the Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Japan, as part of the "Development of Forest Resources with High Performance for Paper Recycling" research project. This was supported by the Core Research for Evolutional Science and Technology (CREST) team at the Japan Science and Technology Agency Foundation (lST) and by Kyushu University. As a colleague of Dr. Ona, I commend his efforts in organizing the symposium and editing this book. In the forest, there is a multitude of resources, including trees, herbal plants, fruits, fungi, mammals, birds, insects, fishes, reptiles, water, landscapes, and tourist attractions. Nowadays, even the environment is regarded as a kind of forest resource. These resources can provide a diversity of forest products, such as timber for buildings, pulp and paper, charcoal, herbal medicines, wild vegetables, animal protein, edible mushrooms, and nonwoody fibers. From these resources, major forest products are produced using various species of trees. For example, softwood is suitable as building material, while hardwood is suitable for furniture production; pulp and paper are produced from both softwood and hardwood. Therefore, forest locations and forest management methods should vary according to the tree species used for production of different forest products.
Experts from business, academia, governmental agencies and non-profit think tanks to form a transnational and multi-disciplinary perspectives on the combined challenges of environmental sustainability and energy security in the United States and Germany.
How and why do business organisations contribute to climate change governance? The contributors' findings on South Africa, Kenya and Germany demonstrate that business contributions to the mitigation and adaptation to climate change vary significantly.
This volume describes important sites in the Pleistocene deposits of the Thames terrace system laid down by the Thames and its tributaries. It correlates the Thames sequence with deposits found elsewhere in Britain, on the European continent and on the ocean floor.
Forest ecosystems are characterized by a steady change in their structure of function. Natural developments are more and more radically disturbed by human impact. Air pollution leads to soil acidification, change in nutrient budget and to a decreasing vitality of the trees. Forest management can prevent natural succession and often leads to less stable forests. In this book, selected results of 10 years of interdisciplinary ecosystem research are presented. Not only growth and physiological reactions on environmental stress, but also natural succession processes are described and analysed. Besides the description of forest development processes, based on longterm experiments and observation, conclusions for practical forest management are given.
This fully updated second edition presents a conceptual framework of outdoor recreation management in the form of a series of management matrices. It then illustrates this framework through new and updated case studies in the US national parks, and concludes with the principles of outdoor recreation management. Written by an author team with extensive academic and practical experience in the field of outdoor recreation, the book: - Develops and presents a matrix-based framework of strategies and practices for managing outdoor recreation in a sustainable way. - Illustrates application of best management practices through a series of case studies in diverse national parks. - Includes lecture slides and online matrices to aid the teaching of outdoor recreation management to a new generation. Managing Outdoor Recreation, 2nd Edition is an essential resource for undergraduate and graduate students of parks, outdoor recreation and related subjects, as well as a helpful tool for practitioners.
Annual desert plant species of unrelated taxa in the Negev Desert of Israel have developed complementary sets of adaptations and survival strategies as ecological equivalents with physiological, morphological and anatomical resemblances, in the various stages of their life cycles. After 40 years of research in hot deserts Yitzchak Gutterman provides a comprehensive treatise of such adaptations and strategies. In doing so he covers the following topics: post-maturation primary seed dormancy, which prevents germination of maturing seeds before the summer; seed dispersal mechanisms with escape or protection strategies; cautious or opportunistic germination strategies; seedling drought tolerance. The day-length is an important factor in regulating flowering as well as the phenotypic plasticity of seed germination which is also affected by maternal factors.
Despite our growing awareness of the vital role they play in the global environment, wetlands remain among the most endangered ecosystems on Earth and are still being destroyed and degraded at an alarming rate. This much-needed publication, which includes contributions from leading researchers and practitioners, presents a holistic perspective on the restoration of wetland ecosystems such as shallow lakes, streams, floodplains and bogs. Through the use of carefully chosen case studies, the authors examine European wetland restoration projects from Scandinavia to Bulgaria and from Ireland to Belarus, focusing on the lessons they can teach to a new generation of conservationists. As well as reviewing the sum of current knowledge on the subject, the text is a store of practical know-how, covering a wide range of conservation approaches and techniques. It analyzes the major problems in the field and identifies key principles for achieving sustainability in wetland restoration. The topics covered include: * the role of wetlands in landscape functioning * human interference with natural processes such as water and matter cycles and energy dissipation * the impact of land use on global problems such as climate change, floods and droughts * the role played by diversity in wetland functioning The work shows that without sustainable land use over the totality of their catchment areas, and without cohesive inter-agency cooperation, individual restoration projects will have a short life span. The balance between scientific background and practical restoration makes this book a valuable resource for scientists as well as wetland managers, decision makers and land use planners, as well as students of ecology, nature conservation and environmental protection.
Accretionary prisms in convergent margins are natural laboratories for exploring initial orogenic processes and mountain building episodes. They are also an important component of continental growth both vertically and laterally. Accretionary prisms are seismically highly active and their internal deformation via megathrusting and out-of-sequence faulting are a big concern for earthquake and tsunami damage in many coastal cities around the Pacific Rim. The geometries and structures of modern accretionary prisms have been well imaged seismically and through deep drilling projects of the Ocean Drilling Program (and recently IODP) during the last 15 years. Better understanding of the spatial distribution and temporal progression of accretionary prism deformation, structural and hydrologic evolution of the decollement zone (tectonic interface between the subducting slab and the upper plate), chemical gradients and fluid flow paths within accretionary prisms, contrasting stratigraphic and deformational framework along-strike in accretionary prisms, and the distribution and ecosystems of biological communities in accretionary prism settings is most important in interpreting the evolution of ancient complex sedimentary terrains and orogenic belts in terms of subduction-related processes. This book is a collection of interdisciplinary papers documenting the geological, geophysical, geochemical, and paleontological features of modern accretionay prisms and trenches in the northwestern Pacific Ocean, based on many submersible dive cruises, ODP drilling projects, and geophysical surveys during the last 10 years. It also includes several papers presenting the results of systematic integrated studies of recent to ancient on-land accretionary prisms in comparison to modern analogues. The individual chapters are data and image rich, providing a major resource of information and knowledge from these critical components of convergent margins for researchers, faculty members, and graduate and undergraduate students. As such, the book will be a major and unique contribution in the broad fields of global tectonics, geodynamics, marine geology and geophysics, and structural geology and sedimentology.
The Siberian environment is a unique region of the world that is both very strongly affected by global climate change and at the same time particularly vulnerable to its consequences. The news about the melting of sea ice in the Arctic Ocean and the prospect of an ice-free shipping passage from Scandinavia to Alaska along the Russian north coast has sparked an international debate about natural resource exploitation, national boundaries and the impacts of the rapid changes on people, animals and plants. Over the last decades Siberia has also witnessed severe forest fires to an extent that is hard to imagine in other parts of the world where the po- lation density is higher, the fire-prone ecosystems cover much smaller areas and the systems of fire control are better resourced. The acceleration of the fire regime poses the question of the future of the boreal forest in the taiga region. Vegetation models have already predicted a shift of vegetation zones to the north under s- narios of global climate change. The implications of a large-scale expansion of the grassland steppe ecosystems in the south of Siberia and a retreat of the taiga forest into the tundra systems that expand towards the Arctic Ocean would be very signi- cant for the local population and the economy. I have studied Russian forests from remote sensing and modelling for about 11 years now and still find it a fascinating subject to investigate. |
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