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Author: Jean-Jacques Symoens
Publisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 212
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Book Description
Author: Jean-Jacques Symoens
Publisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 212
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Book Description
Author: Thomas C Johnson
Publisher: Routledge
ISBN: 1351435329
Category : Science
Languages : en
Pages : 679
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Book Description
The large lakes of the East African Rift Valley are among the oldest on Earth, and are vital resources for the people of their basins. They are unique among the large lakes of the world in terms of their sensitivity to climatic change, rich and diverse populations of endemic species, circulation dynamics and water-column chemistry, and long, continuous records of past climatic change. A comprehensive study of the large African lakes is long overdue. The scientific justification for such an effort is noted in the previous paragraph and is illustrated in great detail in this volume. Societal need for the sustainable utilization of these lakes offers an even more compelling reason for examination of biological food webs, water quality, and past climate variability in East Africa. The lakes provide the most important source of protein for the people of the African Rift Valley, and fish populations are shifting dramatically in response to fishing pressure, introduction of exotic species, land use impact on water quality, and perhaps climatic change. Current estimates of primary productivity, the underpinning of the food resource, are extremely crude and based on only a few spot measurements.
Author: A.Ivan Johnson
Publisher: Routledge
ISBN: 1351435310
Category : Science
Languages : en
Pages : 682
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Book Description
The large lakes of the East African Rift Valley are among the oldest on Earth, and are vital resources for the people of their basins. They are unique among the large lakes of the world in terms of their sensitivity to climatic change, rich and diverse populations of endemic species, circulation dynamics and water-column chemistry, and long, continuous records of past climatic change. A comprehensive study of the large African lakes is long overdue. The scientific justification for such an effort is noted in the previous paragraph and is illustrated in great detail in this volume. Societal need for the sustainable utilization of these lakes offers an even more compelling reason for examination of biological food webs, water quality, and past climate variability in East Africa. The lakes provide the most important source of protein for the people of the African Rift Valley, and fish populations are shifting dramatically in response to fishing pressure, introduction of exotic species, land use impact on water quality, and perhaps climatic change. Current estimates of primary productivity, the underpinning of the food resource, are extremely crude and based on only a few spot measurements.
Author: Patrick Denny
Publisher: Springer Science & Business Media
ISBN: 9400955049
Category : Science
Languages : en
Pages : 355
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Book Description
Interest in the biology of African 'wetlands' was initiated in the last century with the hypothesis that Lake Tanganyika was once part of a Jurassic sea, and was furthered by Cunnington's expedition at the beginning of this century which proved that it was not. In the late 1920's, ecological studies, encouraged by the growing importance of inland fisheries, were started hy British, French and Belgian biologists. Some twenty years later several government limnological research centres and fishery departments were established in tropical Africa, and scientific progress was accelerated. Scientific collaboration between the regions south of the Sahara was started formally in 1951 by the Scientific Council for Africa and stimulated by the International Biological Programme (1964-74) with its emphasis on biological productivity. Some of its interests were takcn on by SCOPE which recently selected continental wetlands as a Special Project; hence this book. The five authors, with-Patrick Denny as editor, have made a very valuable contribution both to science and to thc management of Africa's natural rcsourccs: thcy have filled a gap in the synthesis of knowledge about Africa's environments which is long overdue. The term 'wetland' is used today in several different contexts. For this purpose, it excludes the seas and large open inland waters. which are too deep for rooted plants, but includes the huge areas of floodplains and dambos which may change seasonally from standing water to very dry lands.
Author: L. A. Lewis
Publisher: Taylor & Francis
ISBN: 1136880968
Category : Business & Economics
Languages : en
Pages : 421
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Book Description
First published in 1988, this work provides a comprehensive picture of the range of physical environments in Africa, focusing upon those characteristics and issues central to the management of environmental resources. Beginning with an overview of the geographical and environmental history of Africa, the authors also provide to the evolution of the management of resources and then details a broadly defined ecosystem approach, in which major environmental resource issues are identified and addressed in the tropical rainforest, the Savannah dry-forest, the arid and semi-arid areas, the highlands, and the extra-tropical zones of Northern and Southern Africa. The book is designed to contribute to a better understanding of African environmental and resource-management problems and this reissue should be welcomed by students of Africa and of environmental resource management problems in general.
Author: Food and Agriculture Organization of the United Nations. Committee for Inland Fisheries of Africa
Publisher: Food & Agriculture Org.
ISBN: 9789251035771
Category : Science
Languages : en
Pages : 132
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Book Description
Author: 国立国会図書館 (Japan)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 672
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Book Description
Author: John Francis Talling
Publisher: Cambridge University Press
ISBN: 9780521621151
Category : Nature
Languages : en
Pages : 456
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Book Description
A synthesis of tropical freshwater systems which illustrates the basic theory of freshwater biology.
Author: Food and Agriculture Organization of the United Nations. Committee for Inland Fisheries of Africa. Working Party on Pollution and Fisheries. Session
Publisher: Food & Agriculture Org.
ISBN: 9789251042311
Category : Fisheries
Languages : en
Pages : 36
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Book Description
Author: Rose
Publisher: CRC Press
ISBN: 1135241104
Category : Nature
Languages : en
Pages : 472
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Book Description
This compilation of papers provides useful insights on the differing approaches to water quality and the diversity of strategies in water quality management worldwide. Considering the current situation and looking to the future, the aim of this publication is to provide a sensible addition to the literature by concentrating on several important aspects of water and the environment.
