Ecological Studies – serie
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367 produkter
367 produkter
Del 169 - Ecological Studies
Fire in Tropical Savannas
The Kapalga Experiment
Inbunden, Engelska, 2003
1 633 kr
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Fire is a major agent of disturbance in many biomes of the world but is a particularly important feature of tropical savannas. Up to 50% of the ext- sive tropical savanna landscapes of northern Australia are burnt each year. This includes prestigious conservation reserves such as World Heritage— listed Kakadu National Park, in the Top End of the Northern Territory. As in other savanna regions of the world, the responses of biota to different ?re regimes are poorly understood, such that ?re management represents one of the greatest challenges to conservation managers and researchers alike. This is the context within which a landscape-scale ?re experiment was established at Kapalga Research Station in Kakadu,which aimed to provide a sound scienti?c basis for conservation management in the region. The experiment was established by The Australian Commonwealth Scienti?c and Industrial Research Organization (CSIRO),but involved collaborators from a range of universities and government agencies, including the m- agers of Kakadu,the Australian Nature Conservation Agency (ANCA:now Parks Australia North). This book summarizes the ?ndings from the Kapalga ?re experiment and explores the implications for conservation management. We believe that Kapalga has provided important insights into the ?re ecology of tropical savannas and has broad relevance for the conservation management of ?- prone landscapes in general. This book should be of interest to researchers, graduate students, and land management agencies. vii viii Preface We are extremely grateful to all our collaborators,both inside and outside CSIRO, for their involvement in the Kapalga experiment.
Inbunden, Engelska, 2003
1 091 kr
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Large-scale experimentation allows scientists to test the specific responses of ecosystems to changing environmental conditions. Researchers at Oak Ridge National Laboratory together with other Federal and University scientists conducted a large-scale climatic change experiment at the Walker Branch Watershed in Tennessee, a model upland hardwood forest in North America. This volume synthesizes mechanisms of forest ecosystem response to changing hydrologic budgets associated with climatic change drivers. The authors explain the implications of changes at both the plant and stand levels, and they extrapolate the data to ecosystem-level responses, such as changes in nutrient cycling, biodiversity and carbon sequestration. In analyzing data, they also discuss similarities and differences with other temperate deciduous forests. Source data for the experiment has been archived by the authors in the U.S. Department of Energy's Carbon Dioxide Information and Analysis Center (CDIAC) for future analysis and modeling by independent investigators.
Del 174 - Ecological Studies
Pollination Ecology and the Rain Forest
Sarawak Studies
Inbunden, Engelska, 2005
1 633 kr
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Rain Forest Biology and the Canopy System, Sarawak, 1992–2002 The rain forest takes an immense breath and then exhales, once every four or ?ve years, as a major global weather pattern plays out, usually heralded by El Nin ˜o–Southern Oscillation. While this powerful natural cycle has occurred for many millennia, it is during the past decade that both the climate of Earth and the people living on it have had an increasing in?uence on the weather pattern itself, with many biological consequences. In Southeast Asia, as also in most of the Neotropics, El Nin ˜o accompanies one of the most exuberant o- pourings of nature’s diversity. After several years of little activity, the incredibly diverse rain forests suddenly burst into ?ower—a phenomenon referred to as General Flowering in Asia. Plant populations are rejuvenated and animals are fed, but the process involves a delicate and complex balance. When the canopy access system was under construction at Lambir Hills - tional Park in the early 1990s, it made use of an underlying technology that was already in place: bridges. For centuries, bridges have spanned the natural chasms over rivers. This existing network of bridges and the people who built and use them produced the technology we needed to gain access to the canopy. Bridge builders were our natural allies in the quest for biological knowledge of the high canopy.
Inbunden, Engelska, 2005
2 174 kr
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Extensive research in geology, atmospheric science, and paleontology provides a detailed history of CO2 in the atmosphere and an understanding of factors that have influenced changes in the past. This knowledge is used to illuminate the role of atmospheric CO2 in the modern carbon cycle and in the evolution of plants and animals. With an understanding of the history and dynamics of the biosphere, the authors address the future role of atmospheric CO2 and its likely effects on ecosystems. This book incorporates the advances of various earth science, environmental, and ecological fields into an overall account of global change and the changing dynamics of life on Earth.
Inbunden, Engelska, 2004
2 174 kr
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Photosynthetic Adaptation: Chloroplast to Landscape thoroughly studies photosynthetic mechanisms at each structural level, from cells to leaves, crown, and canopy. The authors question whether photosynthetic adaptations take place primarily at the metabolic and biochemical level or through changes in structure and form, or both. In the interest of genetic engineering and agricultural applications, the authors analyze the relative importance of genes that control both metabolic and light reactions as well as the structure, arrangement, and orientation of photosynthesis.
Inbunden, Engelska, 2006
2 174 kr
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Coral reefs around the world are sustaining massive damage at an alarming rate. Geological Approaches to Coral Reef Ecology provides a uniquely historical perspective on the destruction - through both natural and human processes - of coral reef ecosystems. Chapters applying the principles of geophysics, paleontology, geochemistry, and physical and chemical oceanography supply novel insights into the workings of coral reefs, complementing real-time ecological studies and providing critical information for crafting realistic environmental policy.By reconstructing the ecological history of coral reefs, the authors are able to evaluate whether or not recent, dramatic changes to reef ecosystems are novel events or part of a long-term trend or cycle. The contributions examine the interacting causes of change, which include hurricane damage, regional outbreaks of coral-consuming predators, disease epidemics, sea-level rise, nutrient loading, global warming and acidification of the oceans. Crucial predictions about the future of coral reefs lead to practical strategies for the successful restoration and management of reef ecosystems. Geological Approaches to Coral Reef Ecology will be of particular interest to students and professionals in ecology and marine biology, including environmental managers.
Del 196 - Ecological Studies
Western North American Juniperus Communities
A Dynamic Vegetation Type
Inbunden, Engelska, 2007
1 091 kr
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In North America Juniperus woodlands occupy approximately 55 million hectares, an area larger than the state of Texas. Various species of Juniperus have been increasing in density and are expanding into associated grasslands, reducing the size of the grasslands. The reason for the Juniperus expansion is highly debated, but has important implications for global change and fire regime studies. Western North American Juniperus Communities addresses various aspects of the biology, ecology, and management of Juniperus woodlands and savannas, by synthesizing past, current, and proposed future research. The book will provide professionals with a solid background in Juniperus ecosystems, enabling them to manage the communities for maximum sustained productivity and diversity. Although the book focuses on Juniperus communities in North America, a discussion of other regions and larger research implications is included as well.
Del 203 - Ecological Studies
Continental-Scale Greenhouse Gas Balance of Europe
Inbunden, Engelska, 2008
1 633 kr
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The human interference with the climate system, the perturbation of the carbon cycle through massive release of greenhouse gases, caused by fossil fuel burning and land-use change, is threatening society and represents a key challenge for research and policies in the twenty-first century. Growing evidence of hum- induced climate change has raised public concern calling for urgent international policy actions. Initiatives culminated in the establishment of the United Nations Framework Convention for Climate Change (UNFCCC) and the Kyoto Protocol (1997), where Parties for the first time agreed on legally binding commitments to reduce greenhouse gas emissions. It is worth noting that the unfinished ‘sink’ business, the Articles in the Kyoto Protocol dealing with terrestrial biospheric carbon dioxide sources and sinks, gave carbon cycle research a real boost. In the 1990s, the regional carbon balance and how the different ecosystems contribute at different timescales under different environmental conditions were hardly known. During the fourth Framework Programme (1994–1998), the European Union supported more than 20 research projects studying the components of the carbon cycle. These projects provided a solid basis for a more integrated attempt to tackle the research challenges and demands imposed by the Kyoto Protocol at European scale. Both the European Commission and the scientific community felt that it was time to develop an integrated carbon cycle research programme taking the new challenges on board.
Del 41 - Ecological Studies
Forest Island Dynamics in Man-Dominated Landscapes
Häftad, Engelska, 1981
1 091 kr
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by the authors. This beach-head is only one of several which have recently been made in landscape ecology, striving to invade and occupy a fairly new territory on the map of science. This volume's editors and collaborators made another landing in analysis of space-time patterns of forest islands. Their contribution to the First International Conference on Landscape Ecology (3) and some related analyses (4, 5, 6, 7, 8) expressed the amount of area of a given landscape type as a function of rates of income minus rates of loss in simulation models for land use and cover change. Such models of landscape change as a Markov process complement others of ecological succession for replacement of one species by another (9, 10, 11, 12), and for competition in the growth and survival of individuals while competing for limited resources on a plot "island" in a "sea" of mixed landscape terrain (9, 13). Further analysis of the meaning of terrain and the geologic and soil boundary conditions which constrain ecosystem equations is provided by George Bowen's recent thesis (14) analyzing forest island pattern in Ohio. Percent cover of forest and a density parameter (number of islands per unit area) or else a dissection index for the glaciated and (rougher) unglaciated terrain embodied much of the pattern information that was expressed more abstractly in a factor analysis.
Del 101 - Ecological Studies
Effects of Land-Use Change on Atmospheric CO2 Concentrations
South and Southeast Asia as a Case Study
Inbunden, Engelska, 1993
1 091 kr
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Roger C. Dahlman Environmental Sciences Division U.S. Department of Energy Washington, D.C. The potential for humans to alter Earth's atmosphere has been recognized since the end of the 19th century when Arrhenius estimated that a doubling of atmospheric carbon dioxide could alter the atmospheric radiation balance and raise average global temperature. Today, atmospheric CO concentrations play an important part in the 2 climate-change debate. Sources and sinks of CO associated with land use can be 2 significant determinants of the rate and magnitude of atmospheric CO change. 2 Combustion of fossil fuels and the deforestation associated with land-use change both contribute CO to the atmosphere; in contrast, biological processes on land create 2 potential sinks for the excess CO . Thus, land-use change and associated biological 2 processes become important elements in assessments of future atmospheric CO 2 increase; land-cover properties also affect the Earth's albedo, which is a climate feedback.
Del 82 - Ecological Studies
Quantitative Methods in Landscape Ecology
The Analysis and Interpretation of Landscape Heterogeneity
Häftad, Engelska, 1994
1 958 kr
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Landscape ecology as a modern interdisciplinary science is making use increasingly of quantitative research techniques adopted from other fields. So far, no synthetic reference has been available to those wishing to acquaint themselves with new approaches to quantitative analysis of spatial heterogeneity at the landcape level. This book seeks to meet this need by providing a conceptual framework and illustrating potential applications for methods such as pattern analysis, spatial statistics, fractals, spatial modeling, broad-scale studies, and extrapolation across scales. Each technique is discussed in sufficient detail to be adaptable to a variety of research problems. Quantitative Methods in Landscape Ecology is an important resource for researchers and students of landscape and ecosystem ecology in understanding and analyzing the dynamics of complex spatial systems.
Inbunden, Engelska, 1995
2 174 kr
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Regions with Mediterranean-type climates include parts of California, South America, Australia, and of course, Europe. The effect of global climate change on these heavily populated areas will have major social and political ramifications.This volume addresses issues in these areas, from processes at the leaf level to the individual, ecosystem, and landscape levels. This book will serve to raise awareness on the significance of these types of ecosystems, and on their sensitivity to the threat that global change represents.
Inbunden, Engelska, 1996
1 633 kr
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Alaska's great size is mirrored by the large number and diversity of its freshwater ecosystems. This volume reviews and synthesizes research on a variety of Alaskan freshwaters including lakes, rivers and wetlands. The vast range of Alaskan habitats ensures that the chapters in this book will provide valuable information for readers interested in freshwaters, particularly nutrient dynamics, biotic adaptations, recovery mechanisms of aquatic biota, stream succession and the management of human-induced changes in aquatic habitats.
Del 118 - Ecological Studies
Impact of Air Pollutants on Southern Pine Forests
Inbunden, Engelska, 1995
1 633 kr
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The public's attitude toward air pollution in the United States evolved substantially during the 1960s. One of the results of the nation's emerging environmental ethic was the creation of the U. S. Environmental Protection Agency (EPA) in December of 1970. Prior to this time, research was focused on the impacts of air pollution on human health and welfare and was largely conducted by several federal research agencies, which included the Department of Health, Education, and Welfare; the National Oceanic and Atmospheric Administration; and the U. S. Department of Agricul ture. After the creation of the EPA, much of this work was consolidated in one regulatory agency, which resulted in periodic evaluations of the various effects of atmospheric pollution on human health, materials, agriculture, and forest ecosystems. At the same time that environmental interest was growing in the United States, concern increased in the European scientific community and public over the ecological impacts of acidic deposition. As the magnitude of the damage to European lakes and streams and the widespread decline in Norway spruce and silver fir was reported, concern that similar problems were occurring in the United States increased substantially. This concern was heightened by press reports of high elevation spruce-fir forest declines in the Adirondack and Appalachian Mountains and the decline and death of sugar maples in the northeastern United States and Canada.
Del 199 - Ecological Studies
Hydrological and Biological Responses to Forest Practices
The Alsea Watershed Study
Inbunden, Engelska, 2007
1 633 kr
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The Alsea Logging and Aquatic Resources Study, commissioned by the Oregon Legislature in 1959, marked the beginning of four decades of research in the Pacific Northwest devoted to understanding the impacts of forest practices on water quality, water quantity, aquatic habitat, and aquatic organism popu- tions. While earlier watershed research examined changes in runoff and erosion from various land uses, this study was the first watershed experiment to focus so heavily on aquatic habitat and organism response to forest practices. The Alsea Watershed Study, as it came to be known, extended over 15 years with seven years of pretreatment calibration measurements, a year of treatment, and seven years of post-treatment monitoring. The research was a cooperative effort with scientists from Oregon State University, Oregon Department of Fish and Wildlife, the U.S. Geological Survey, and the U.S. Environmental Protection Agency. Cooperating landowners included the Georgia-Pacific Corporation, the U.S. Forest Service, and a local rancher. It was a remarkable 15-year partnership marked by excellent cooperation among the participants and outstanding coordination among the scientists, many of whom participated actively for the entire period.
Del 116 - Ecological Studies
High-Latitude Rainforests and Associated Ecosystems of the West Coast of the Americas
Climate, Hydrology, Ecology, and Conservation
Inbunden, Engelska, 1995
1 633 kr
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Regional intercomparisons between ecosystems on different continents can be a powerful tool to better understand the ways in which ecosystems respond to global change. Large areas are often needed to characterize the causal mechanisms governing interactions between ecozones and their environments. Factors such as weather and climate patterns, land-ocean and land-atmosphere interactions all play important roles. As a result of the strong physical north-south symmetry between the western coasts of North and South America, the similarities in climate, coastal oceanography and physiography between these two regions have been extensively documented. High Latitude Rain Forests and Associated Ecosystems of the West Coast of the Americas presents current research on West Coast forest and river ecology, and compares ecosystems of the Pacific Northwest with those of South America.
Del 125 - Ecological Studies
Ecology and Conservation of Great Plains Vertebrates
Inbunden, Engelska, 1996
1 633 kr
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The frontier images of America embrace endless horizons, majestic herds of native ungulates, and romanticized life-styles of nomadie peoples. The images were mere reflections of vertebrates living in harmony in an ecosystem driven by the unpre dictable local and regional effects of drought, frre, and grazing. Those effects, often referred to as ecological "disturbanees," are rather the driving forces on which species depended to create the spatial and temporal heterogeneity that favored ecological prerequisites for survival. Alandscape viewed by European descendants as monotony interrupted only by extremes in weather and commonly referred to as the "Great American Desert," this country was to be rushed through and cursed, a barrier that hindered access to the deep soils of the Oregon country, the rich minerals of California and Colorado, and the religious freedom sought in Utah. Those who stayed (for lack of resources or stamina) spent a century trying to moderate the ecological dynamics of Great Plains prairies by suppressing fires, planting trees and exotic grasses, poisoning rodents, diverting waters, and homogenizing the dynamies of grazing with endless fences-all creating bound an otherwise boundless vista. aries in Historically, travelers and settlers referred to the area of tallgrasses along the western edge of the deciduous forest and extending midway across Kansas as the "True Prairie. " The grasses thlnned and became shorter to the west, an area known then as the Great Plains.
Del 179 - Ecological Studies
Lamto
Structure, Functioning, and Dynamics of a Savanna Ecosystem
Inbunden, Engelska, 2006
2 174 kr
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Known as "a dream place for scientists" the Lamto savannas, located on the edge of the Cote d'Ivoire rain forests, are some of the only savannas in the world where ongoing ecological research has endured for over forty years. Drawing from and synthesizing this abundance of research, the book examines the structure, function, and dynamics of the Lamto humid savanna. Beginning with the history of the Lamto ecology station, proceeding on to an overview of the major enivronmental conditions of the site, and specifically examining the integrative view of energy and nutrient fluxes relative to the dynamics of the region's vegetation, this exacting work is as unique and treasured as Lamto itself.
Del 152 - Ecological Studies
Global Biodiversity in a Changing Environment
Scenarios for the 21st Century
Inbunden, Engelska, 2001
549 kr
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The scientific community has voiced two general concerns about the future of the earth. Climatologists and oceanographers have focused on the changes in our physical environment -- changes in the climate, the oceans, and the chemistry of the air we breathe. Environmental biologists, on the other hand, have addressed issues of conservation and the extinction of species. There is increasing evidence that these two broad concerns are intertwined and mutually dependent. Past changes in biodiversity have both responded to and caused changes in Earth's environment. In its discussions of ten key terrestrial biomes and freshwater ecosystems, this volume uses our broad understanding of global environmental change to present the first comprehensive scenarios of biodiversity for the twenty-first century. Combining physical earth science with conservation biology, Future Scenarios of Global Biodiversity provides a starting point for regional assessments on all scales. The book will be of interest to those concerned with guiding research on the changing environment of the earth and with planning future policy, especially in accordance with the Global Biodiversity Convention.
Del 152 - Ecological Studies
Global Biodiversity in a Changing Environment
Scenarios for the 21st Century
Häftad, Engelska, 2001
549 kr
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The scientific community has voiced two general concerns about the future of the earth. Climatologists and oceanographers have focused on the changes in our physical environment -- changes in the climate, the oceans, and the chemistry of the air we breathe. Environmental biologists, on the other hand, have addressed issues of conservation and the extinction of species. There is increasing evidence that these two broad concerns are intertwined and mutually dependent. Past changes in biodiversity have both responded to and caused changes in Earth's environment. In its discussions of ten key terrestrial biomes and freshwater ecosystems, this volume uses our broad understanding of global environmental change to present the first comprehensive scenarios of biodiversity for the twenty-first century. Combining physical earth science with conservation biology, Future Scenarios of Global Biodiversity provides a starting point for regional assessments on all scales. The book will be of interest to those concerned with guiding research on the changing environment of the earth and with planning future policy, especially in accordance with the Global Biodiversity Convention.
Del 156 - Ecological Studies
Urban Air Pollution and Forests
Resources at Risk in the Mexico City Air Basin
Inbunden, Engelska, 2002
1 633 kr
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At present, roughly half of the world's population lives in urban centers. There are now more than 20 cities with a population of over 10 million inhabitants, compared to less than 5 about 50 years ago. This tendency toward urbanization is expected to continue, particularly in the developing world. A consequence of this growing trend is that millions of people are being exposed to harmful levels of urban air pollutants caused mainly by emissions from motor vehicles and from industrial and domestic activities involving the combustion of fossil fuels. The driving force for the design and implementation of emission control strate gies aimed at improving air quality has been the protection of the health of the population in urban centers. There are, however, other consequences of the pres ence of air pollutants besides the direct effect on human health. Reduced visibil ity, damage to monuments and buildings, and many other such consequences indirectly affect our quality of life. Another set of consequences involves damage to ecological systems. In fact, the nature of "photochemical smog" was first uncovered in the 1950s in connection with observations of its harmful effects on crops and plants in the vicinity of Los Angeles.
Del 160 - Ecological Studies
Fire and Climatic Change in Temperate Ecosystems of the Western Americas
Inbunden, Engelska, 2002
1 681 kr
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Both fire and climatic variability have monumental impacts on the dynamics of temperate ecosystems. These impacts can sometimes be extreme or devastating as seen in recent El Nino/La Nina cycles and in uncontrolled fire occurrences. This volume brings together research conducted in western North and South America, areas of a great deal of collaborative work on the influence of people and climate change on fire regimes. In order to give perspective to patterns of change over time, it emphasizes the integration of paleoecological studies with studies of modern ecosystems. Data from a range of spatial scales, from individual plants to communities and ecosystems to landscape and regional levels, are included. Contributions come from fire ecology, paleoecology, biogeography, paleoclimatology, landscape and ecosystem ecology, ecological modeling, forest management, plant community ecology and plant morphology. The book gives a synthetic overview of methods, data and simulation models for evaluating fire regime processes in forests, shrublands and woodlands and assembles case studies of fire, climate and land use histories. The unique approach of this book gives researchers the benefits of a north-south comparison as well as the integration of paleoecological histories, current ecosystem dynamics and modeling of future changes.
Del 58 - Ecological Studies
Ecology of Biological Invasions of North America and Hawaii
Häftad, Engelska, 1989
1 123 kr
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The diversity of the earth's climates superimposed upon a complex configuration of physical features has provided the conditions for the evolution of a remarkable array of living things which are linked together into complex ecosystems. The kinds of organisms comprising the ecosystems of the world, and the nature of their interactions, have constantly changed through time due to coevolutionary interactions along with the effects of a continually changing physical environ ment. In recent evolutionary time there has been a dramatic and ever-accelerating rate of change in the configuration of these ecosystems because of the increasing influence of human beings. These changes range from subtle modifications caused by anthropogenically induced alterations in atmospheric properties to the total destruction of ecosystems. Many of these modifications have provided the fuel, food, and fiber which have allowed the expansion of human populations. Unfortunately, there have been many unanticipated changes which accompanied these modifications which have had effects detrimental to human welfare in cluding substantial changes in water and air quality. For example, the use of high-sulfur coal to produce energy in parts of North America is altering the properties of freshwater lakes and forests because of acidification.
Del 131 - Ecological Studies
Structuring Role of Submerged Macrophytes in Lakes
Inbunden, Engelska, 1997
2 174 kr
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Submerged macrophytes have been the object of intensive research, and a large body of literature exists on their growth, reproduction, and physiology. Several studies have focused on the interactions between submerged macrophytes and other autotrophic components and the impact of the plants on the dynamics of nutrients, dissolved organic and inorganic carbon, oxygen, and pH. Comparatively few studies have dealt with the ability of submerged macrophytes to modulate the structure and dynamics of pelagic and benthic food webs. Recently, however, the amount of research into the structuring role of submerged macrophytes in food webs has markedly increased, and the results obtained so far suggest that sub merged macrophytes are of significant importance for the food web interactions and environmental quality of lakes, even at relatively low areal plant coverage. For example, plants affect the interactions between predacious, planktivorous, and benthivorous fish and between fish and invertebrates, including key organisms such as large zooplankton and snails. Changes in these interactions in turn may have cascading effects on the entire food web in both the pelagial and the littoral zone. To provide a forum for discussion of recent results in this growing field of research and to define future research needs, a workshop was held on 16 to 20 June, 1996, at the Freshwater Centre in Silkeborg, Denmark. The present book is a result of the workshop. It is divided into three parts.
Del 132 - Ecological Studies
Vegetation of the Tropical Pacific Islands
Inbunden, Engelska, 1997
1 091 kr
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Mueller-Dombois and the late F.R. Fosberg are recognized as the leading authorities on the plant diversity and ecology of Pacific islands. This book is a majesterial synthesis of the vegetation and landscapes of the islands of the Pacific Ocean. These islands encompass a vast range of climate, geography and geology. The authors' great efforts in assembling the existing information into an integrated, comprehensive format will be welcomed by biogeographers, plant ecologists, conservation biologists, and all scientists with an interest in island biology.
Häftad, Engelska, 1997
1 091 kr
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Mueller-Dombois and the late F.R. Fosberg are recognized as the leading authorities on the plant diversity and ecology of Pacific islands. This book is a majesterial synthesis of the vegetation and landscapes of the islands of the Pacific Ocean. These islands encompass a vast range of climate, geography and geology. The authors' great efforts in assembling the existing information into an integrated, comprehensive format will be welcomed by biogeographers, plant ecologists, conservation biologists, and all scientists with an interest in island biology.
Del 134 - Ecological Studies
Oxidant Air Pollution Impacts in the Montane Forests of Southern California
A Case Study of the San Bernardino Mountains
Inbunden, Engelska, 1998
2 174 kr
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Since the 1950s, the pines native to the San Bernardino Mountains in Southern California have shown symptoms of decline that have proven to result from exposure to ozone, a major plant-damaging gas in photochemical oxidant air pollution. Because of their proximity to major urban areas, the San Bernardino Mountains have served as a natural laboratory for studying effects of oxidant and acidic air pollution on a mixed-conifer forest. This volume presents a body of research conducted over more than thirty years, including an intensive interdisciplinary five-year study begun in 1991. Chapters include studies of the relationships of biogeography and climate to the region's air pollution, the chemical and physiological mechanisms of ozone injury, as well as the impacts of nitrogen-containing pollutants and natural stresses on polluted forests. The synthesis of such long-term studies provides insights into the combined influences of pollutants on ecosystem function in forested regions with Mediterranean-type climates.
Del 201 - Ecological Studies
Everglades Experiments
Lessons for Ecosystem Restoration
Inbunden, Engelska, 2008
2 174 kr
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In the late 1960s, I worked as a graduate teaching assistant in plant ecology for the late Dr. John Henry Davis at the University of Florida. On one of our visits to the Everglades, he mentioned to me that he had been studying problems of the Everglades since the early 1930s, and that rapid growth in Florida, unless checked, was about to doom the Everglades. He hoped his vegetation survey of the Everglades and his v- etation map could someday be used to help restore the Everglades to some semblance of what it had been prior to the turn of the century. These long-forgotten discussions with Dr. Davis were rekindled when, during a wetland conference in Orlando, Florida in the late 1980s, I was asked what might be responsible for the reported massive invasion of cattails that had been noted during the past decade in the Everglades. Several hypotheses were presented at the meeting, including some preliminary data on the significant inputs of nutrients from agricultural lands and Lake Okeechobee to the north. The shifts in the hydrologic conditions and flow patterns of the existing Everglades were also mentioned. Because of the extensive work on phosphorus and nutrient retention then being done at the Duke University Wetland Center, I was asked in early 1989 to do a preliminary survey and analysis of the ecological status of the Everglades. From this early work, carried out by Dr.
Del 159 - Ecological Studies
Big-Leaf Mahogany
Genetics, Ecology, and Management
Inbunden, Engelska, 2002
2 174 kr
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Big-Leaf Mahogany is the most important commercial timber species of the tropics. Current debate concerning whether to protect it as an endangered species has been hampered by the lack of complete, definitive scientific documentation. This book reports on vital research on the ecology of big-leaf mahogany, including genetic variations, regeneration, natural distribution patterns and the silvicutural and trade implications for the tree.
Inbunden, Engelska, 2001
1 091 kr
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Aerial photography has revealed the striking, widespread phenomenon of repeating patterns of vegetation in more arid areas of the world. Two interdependent phases, bands of dense and sparse vegetation, alternate in the landscape. This volume synthesizes half a centurys accumulated knowledge of both theoretical and applied landscape functions from a variety of these regions. It covers structure, dynamics, and methods of study, as well as disturbances to these landscapes and relevant management issues. Chapters are included to discuss the role of modeling in answering questions about the origins and complex processes of banded landscapes. Studies of banded landscapes have yielded valuable lessons for understanding other semi-arid landscapes as well, leading to a knowledge base facilitating sustainable use and rehabilitation.