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Long-term population monitoring is an important tool in our investigations of the role waterbirds play in their environment. This book is international in scope and presents information on species as diverse as the Common Loon, Harlequin Duck, and Semi-Palmated Sandpiper, and habitat in locations ranging from Iceland to Japan. Papers presented in this volume further our understanding of the important role that limnology plays in determining habitat suitability for waterbirds.
The rapid growth of the discipline of aquatic ecology has been driven both by scientific interest in the complexities of aquatic ecosystems and by their enormous environmental importance and sensitivity. This book focuses on the remarkably diverse roles played by underwater plants, and is divided into three parts: 10 thematic chapters, followed by 18 case studies, and rounded off by three integrative chapters. The topics range from macrophytes as fish food to macrophytes as mollusc and microbe habitat, making this of interest to aquatic ecologists as well as limnologists, ecosystem ecologists, microbial ecologists, fish biologists, and environmental managers.
This book gives a comparative treatment of topics accross lake, reservoir, and rive ecosystems. These analysis do indeed indicate differences among the properties of lakes, land-water interface regions, reservoirs, and rivers. Importantly, these analysis also indicate marked commonality in function.
The present volume comprises aspects of both basic and applied limnology. They include works on physical, chemical, and biological limnology, as well as experimental approaches in selected areas. Contributions from investigators regarding aquatic conservation and biodiversity were specifically not available and therefore, these aspects are considered in various included works. Most manuscripts deal with lentic aquatic resources. This is not surprising since Mexican limnology followed the general study trend of that from temperate limnology. Despite this, we must emphasize that lotic resources in Mexico are quite important both locally and regionally. This does not mean that rivers are not under limnological research in Mexico, just that their study has only recently begun. It is the intention of the volume to stimulate a larger section of limnologists to further research in this field. It is to be hoped that policy-framing governmental authorities in Mexico will benefit from it, and consider some of the aspects described so that further damage to the epicontinental waterbodies can be halted, and remedial measures can be considered in the future.
For senior-level undergraduate or graduate courses in limnology or aquatic management in the Life Sciences and Biology departments. Written from an ecosystem perspective, this user-friendly and thorough text discusses events that happen below the waterline of lakes, rivers, and wetlands. The text links them back to the attributers of the drainage basins, the overlying atmosphere and climate, which have a major impact on inland waters and their biota. It also contains a large number of easy-to-comprehend figures and tables that reinforce the written material and provide evidence for statements made.
Australia is the world's driest inhabited continent. Water is our limiting resource. It might therefore be thought that our water resources would be the subject of the most intensive study. Certain aspects, it must be conceded, have received much attention, notably the availability of water in terms of actual quantity. The size of the surface water and the groundwater resource is well understood and indeed receives about as much study as can reasonably be expected in a country with as sparse a population and level of scientific manpower as ours. Although the importance of understanding the water resource in terms of quantity is widely accepted, what has not been generally appreciated is that for this resource to be 'available' to human society for all the different uses to which it is put, it is not sufficient that there exists within easy reach of the end users a certain total volume of water. For that water to fulfil its functions-for agriculture, industry, the home, recreation, biological conservation-it must be in a certain state: it must conform to certain chemical, physical and biological criteria, and what has not been sufficiently appreciated in Australian society is that the condition a water is in depends very much on the ecology of the waterbody in which it resides. There are waterbodies in the world, for example high-altitude glacial lakes, which are naturally so pristine that their water could be used for any purpose without treatment.
Birds are an integral part of most freshwater ecosystems (lakes, rivers, wetlands) but their role in the trophic dynamics of these water bodies has often been overlooked. As a conspicuous part of the biota of water bodies, aquatic birds are indicators of their trophic state both in terms of species composition (quality) as well as occupancy and breeding (quantity). Birds may also influence the trophic state of a water body by importing nutrients (.e.g. resident or migrating birds feeding on adjacent watersheds or the sea). Because of anthropogenic activities, predation or their mobility, birds may not utilize otherwise suitable aquatic habitat. These factors complicate the relationship between aquatic bird production and the trophic status of habitats. As a consequence, the role of aquatic birds in freshwater ecosystems has usually been ignored. This volume contains a wide range of papers selected from those presented at the symposium and reviewed.
Wetlands occur expansively all over the world in all the climatic zones and are appraised to harbour nearly 6.4% of the Earth’s surface, of which India domiciles about 18.4% of global wetlands and Gujarat 36% of country wetlands. As per Millennium Ecosystem Assessment (MEA), wetlands deliver 45% of the world’s natural productivity and ecosystem services of which the benefits are estimated at $20 trillion a year. Thus, wetlands exhibit enormous diversity according to their genesis, geographical location, water regime and chemistry, dominant plants and soil or sediment characteristics. Wetlands directly and indirectly support millions of people in providing services such as food, fibre and raw materials, storm and flood control, clean water supply, scenic beauty and educational and recreational benefits. Apart from beneficiary contribution of wetlands to the ecosystem, biotic and abiotic components, and human inhabitants, the very subsistence of these unique natural resources is under intimidation due to developmental activities, population pressure, and anthropogenic stress. Globally, the areal extent of wetland ecosystems ranges from 917 million hectares (m ha) to more than 1275 m ha with an estimated economic value of about USD 15 trillion a year. Overall, 1052 Sites in Europe; 289 Sites in Asia; 359 Sites in Africa; 175 Sites in South America; 211 Sites in North America; and 79 Sites in Oceania region have been recognized as per international recognition for designation to be handled under protected areas. It gives us an immense pleasure in presenting this comprehensive book on Ecosystem Analysis of Two Tropical Community Reservoirs of India. This book covers an extensive research on two significant wetlands of national importance of Central Gujarat, India, listed in ‘Asian Directory of Wetlands’, highlighting point and non-point sources of pollution, nutrient budget and recycling of nutrients in surface water and bottom sediments, planktons as indicators and markers of pollution, macrophytes as indicators of quality of wetlands, suitability of habitat for waterfowl conservation, and conservation and site-specific management strategies for sustainable use of biotic resources with recommendations and mitigating measures. We hope that this book will be of a great help to students, teachers, scientists, wetland conservationists, policy makers and government authorities, in enhancing their knowledge in the field of wetland ecology, biodiversity, conservation, restoration, and management for sustaining prevailing abiotic and biotic resources for better future.