Suchergebnisse

Reactive oxygen species (ROS) are increasingly appreciated as down-stream effectors of cellular damage and dysfunction under natural and anthropogenic stress scenarios in aquatic systems. This comprehensive volume describes oxidative stress phenomena in different climatic zones and groups of organisms, taking into account specific habitat conditions and how they affect susceptibility to ROS damage. A comprehensive and detailed methods section is included which supplies complete protocols for analyzing ROS production, oxidative damage, and antioxidant systems. Methods are also evaluated with respect to applicability and constraints for different types of research. The authors are all internationally recognized experts in particular fields of oxidative stress research. This comprehensive reference volume is essential for students, researchers, and technicians in the field of ROS research, and also contains information useful for veterinarians, environmental health professionals, and decision makers

Prologue -- Water as a substance -- Rivers and lakes-their distribution, origins, and forms -- Water economy -- Light in inland waters -- Fate of heat -- Water movements -- Structure and productivity of aquatic ecosystems -- Oxygen -- Salinity of inland waters -- Inorganic carbon complex -- Nitrogen cycle -- Phosphorus cycle -- Iron, sulfur, and silica cycles -- Planktonic communities: algae and cyanobacteria -- Planktonic communities: zooplankton and their interactions with fish -- Bacterioplantton -- Land-water interfaces larger plants -- Land-water interfaces: attached microorganisms, littoral algae, and zooplankton -- Shallow lakes and ponds -- Benthic animals and fish communities -- Detritus: organic carbon cycling and ecosystem metabolism -- Past productivity: paleoliminology -- Ontogeny of inland aquatic ecosystems --Inland waters: understanding is essential for the future

Stream Ecosystems in a Changing Environment synthesizes the current understanding of stream ecosystem ecology, emphasizing nutrient cycling and carbon dynamics, and providing a forward-looking perspective regarding the response of stream ecosystems to environmental change. Each chapter includes a section focusing on anticipated and ongoing dynamics in stream ecosystems in a changing environment, along with hypotheses regarding controls on stream ecosystem functioning. The book, with its innovative sections, provides a bridge between papers published in peer-reviewed scientific journals and the findings of researchers in new areas of study

In a perspective of sustainable management, the balance between ecological dynamics, social and economic are now at the heart of ecological modeling and environmental strategies screenwriting. Diversity and marine ecosystems function illustrates biodiversity, habitat diversity, structures and food webs in various oceans of the world and systems: pelagic and benthic ecosystems, coral reefs and seagrass beds, oasis of hydrothermal vents ridges or areas rich upwelling. Appropriate observation methods, long-term monitoring and modeling reveal the complexity of systems, trophic interactions and spatiotemporal dynamics. The ecosystem approach is a prerequisite to assess the state of these systems, their living resources and ecological services involved in local and global environmental changes