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Animals are a major link between the water column (pelagic) and the bottom (benthic) habitats in most shallow systems. This coupling is dominated by active processes such as suspension-feeding in which the organism actively uses energy to pump water that is then filtered to remove suspended particles that are consumed while undigested remains are deposited on the bottom. As a result of this feeding on and metabolism of particles, the animals excrete dissolved inorganic and organic waste back into the water column, and thus, become major components in the cycling and feedback of essential elements. With relatively high weight specific filtration rates of 1 10 liters/hour/gram dry tissue and a propensity to form large aggregated populations (beds, reefs, schools and swarms), these organisms can play an important role in regulating water column processes Although estuarine bivalve molluscs such as oysters and mussels dominate the suspension-feeder literature, other groups including plankton and nekton that are found in estuarine as well as other aquatic systems are also potentially important removers of suspended particles. Thus, a significant part of the NATO Advanced Research Workshop focused on suspension-feeders as controllers of plankton abundance, biomass and diversity, system metabolism, nutrient cycling and scale dependency. Systems dominated by suspension-feeders are typically impacted by human activities including recreation, aquaculture, human and industrial pollution, and bilge water from shipping. Suspension-feeders are often impacted by fisheries and over-exploitation. These impacts commonly result in changes in ecosystem structure either through the food chain concentration of harmful substances or diseases, the introduction of alien species of suspension-feeders, or the instability of suspension-feeders systems through species displacement or phase shifts in the dominance between different suspension-feeding components such as nekton or zooplankton. These issues were addressed near the close of the workshop along with conclusions and syntheses developed by the working groups.
General ecology and biosociology --- biodiversiteit --- ecologie --- ecosystemen
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Ecosystems are complex and enigmatic entities that are ultimately our life support systems. Understanding these systems to the point of being able to predict their behaviour in the face of perturbations requires that researchers adopt a number of strategies that vary in both approach and scale. This book, in a sense, is representative of some of the developments that have unfolded when math and physics met ecology. Here, some of the world's leading ecologists examine ecosystems from theoretical, experimental, and empirical viewpoints, from energetics to ecosystems. The book begins with simplifying and synthesizing nature's complex relationships. It then moves on to explore the mapping between food web structure and function and ends with the role of theory in integrating different research areas. From the breadth of systems analyzed to the rigor of approaches taken, this book is not only a useful resource for students and researchers in ecology, but also serves as a fitting tribute to the life and work of Peter Yodzis.
General ecology and biosociology --- biodiversiteit --- ecologie --- ecosystemen
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General ecology and biosociology --- Invertebrates --- biodiversiteit --- invertebraten
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This book describes the fauna of the Pernambuco Endemism Center in Brazil's Northern Atlantic Forest, an understudied global biodiversity hotspot. Through fifteen curated chapters, it provides the latest information about the fauna of the northern portion of the Atlantic Forest, gathering important information about the faunal composition of the region for the first time. The chapters address animal biodiversity including terrestrial and aquatic vertebrates (fish, amphibians, reptiles, birds, and mammals) and invertebrates (ants, butterflies, dung beetles, hervestmen, spiders, and termites). All chapters provide species lists, taxonomic aspects and richness analysis. Conservation of specific animal groups is also discussed. Finally, the book discusses human impacts on the forest and its biodiversity, emphasizing the need for conservation of this highly impacted ecosystem.
General ecology and biosociology --- Geography --- biodiversiteit --- geografie
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This edited book highlights the potential and actual contributions of the sustainable management and utilization of indigenous biological resources and environment for the development of Africa. The book centers on documenting current trends and issues in the field of resource use and conservation with the view of emphasizing their benefits to the pursuit of development within the region. By documenting the array of natural resources and environment in Africa, this book addresses the topical knowledge and understanding gaps that characterize conservation (rationale for sustainable resource exploration), utilization patterns, and conservation challenges including policy status, environmental threats, impacts of tourism, reduction in food resources, etc., and their effects on the sustainable development of Africa. Through an integrated approach, the book focuses on below and above-ground biological resources and the diverse scales of environment that characterize Africa. This collection of works is very helpful for natural and social scientists, policymakers, strategists, researchers, government and non-government organizations, biodiversity and environmental managers, climate change scientists, practitioners, activists, conservationists, academics, ecologists, undergraduate and postgraduate students, and others who want to learn about and understand the best way to use and protect Africa's resources and heritage sustainably.
General ecology and biosociology --- biodiversiteit --- ecologie
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Biogeography considers the distribution of biological units over a wide range of scales. The units range from genotypes, populations and species to families and higher taxa. Processes can be local, such as the isolation on islands due to sea-level fluctuations, or large-scale tectonic processes that separates continents and creates oceans. In all processes time is an important factor and by combining data on recent patterns with paleontological data the understanding of the distribution of extant taxa can be improved. This volume focuses on speciation due to isolation in island-like settings, and the evolution of large-scale diversity as the result of origination, maintenance and extinction.
General palaeontology --- General ecology and biosociology --- Zoology --- biodiversiteit --- zoölogie --- paleontologie
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Humans have directly modified half of the ice-free terrestrial surface and use 40% of terrestrial production. We are causing the sixth major extinction event in the history of life on Earth. With the Earth's climate, flora, and fauna changing rapidly, there is a pressing need to understand terrestrial ecosystem processes and their sensitivity to environmental and biotic changes. This book offers a framework to do just that. Ecosystem ecology regards living organisms, including people, and the elements of their environment as components of a single integrated system. The comprehensive coverage in this textbook examines the central processes at work in terrestrial ecosystems, including their freshwater components. It traces the flow of energy, water, carbon, and nutrients from their abiotic origins to their cycles through plants, animals, and decomposer organisms. As well as detailing the processes themselves, the book goes further to integrate them at various scales of magnitude those of the ecosystem, the wider landscape and the globe. It synthesizes recent advances in ecology with established and emerging ecosystem theory to offer a wide-ranging survey of ecosystem patterns and processes in our terrestrial environment. Featuring review questions at the end of each chapter, suggestions for further reading, and a glossary of ecological terms, Principles of Terrestrial Ecosystem Ecology is a vitally relevant text suitable for study in all courses in ecosystem ecology. Resource managers and researchers in many fields will welcome its thorough presentation of ecosystem essentials.
General ecology and biosociology --- Pedology --- systematische plantkunde --- biodiversiteit --- ecologie --- ecosystemen
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In The Wrong Place: Alien Marine Crustaceans - Distribution, Biology And Impacts provides a unique view into the remarkable story of how shrimps, crabs, and lobsters - and their many relatives - have been distributed around the world by human activity, and the profound implications of this global reorganization of biodiversity for marine conservation biology. Many crustaceans form the base of marine food chains, and are often prominent predators and competitors acting as ecological engineers in marine ecosystems. Commencing in the 1800s global commerce began to move hundreds - perhaps thousands - of species of marine crustaceans across oceans and between continents, both intentionally and unintentionally. This book tells the story of these invasions from Arctic waters to tropical shores, highlighting not only the importance and impact of all prominent crustacean invasions in the world's oceans, but also the commercial exploitation of invasive crabs and shrimps. Topics explored for the first time in one volume include the historical roots of man's impact on crustacean biogeography, the global dispersal of crabs, barnacle invasions, insights into the potential scale of tropical invasions, the history of the world's most widely cultured shrimp, the invasive history and management of red king crabs in Norway, Chinese mitten crabs in England, and American blue crabs in Europe, the evolutionary ecology of green crabs, and many other subjects as well, touching upon all ocean shores.
General ecology and biosociology --- Hunting. Fishery. Aquaculture --- biodiversiteit --- ecologie --- wetenschappen
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The tropical plant family Pandanaceae comprises three genera, Freycinetia, Pandanus and Sararanga. One-hundred and fourteen genera and 226 species of fungi were found on dead leaves of Pandanaceae collected in Australia, Brunei Darussalam, Fiji, Hawaii, Hong Kong, Malaysia, Mauritius, Nepal, New Zealand, Niue, Philippines, Seychelles, Vanuatu and Vietnam. Taxonomic issues within each fungus genus are discussed and reference made to preceding work. All species are written up with bibliographic details, relevant measurements of the current specimens, known habitat and distribution, collection details, and a discussion on taxonomic conclusions. New taxa (4 genera, 35 species) are fully described and illustrated, each with a plate showing relevant macro- and microscopic details. Keys and/or synoptic tables are provided to all species in 28 genera. In addition, details on almost 700 species of fungi described and recorded worldwide from the Pandanaceae are listed.
General microbiology --- General ecology and biosociology --- biodiversiteit --- microbiologie --- ecologie
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