Author: Francis Dov Por
Publisher:
ISBN:
Category : Aquatic biology
Languages : en
Pages : 236

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Book Description

Author: Henri J. Dumont
Publisher: Springer Science & Business Media
ISBN: 1402097263
Category : Science
Languages : en
Pages : 819

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Book Description
What have we learnt about the Nile since the mid-1970s, the moment when Julian Rzóska decided that the time had come to publish a comprehensive volume about the biology, and the geological and cultural history of that great river? And what changes have meanwhile occurred in the basin? The human popu- tion has more than doubled, especially in Egypt, but also in East Africa. Locally, industrial development has taken place, and the Aswan High Dam was clearly not the last major infrastructure work that was carried out. More dams have been built, and some water diversions, like the Toshka lakes, have created new expanses of water in the middle of the Sahara desert. What are the effects of all this on the ec- ogy and economy of the Basin? That is what the present book sets out to explore, 33 years after the publi- tion of “The Nile: Biology of an Ancient River”. Thirty-seven authors have taken up the challenge, and have written the “new” book. They come from 13 different countries, and 15 among them represent the largest Nilotic states (Egypt, Sudan, Ethiopia, Uganda, and Kenya). Julian Rzóska died in 1984, and most of the - authors of his book have now either disappeared or retired from research. Only Jack Talling and Samir Ghabbour were still available to participate again.

Author: Victor R. Alekseev
Publisher: Springer Science & Business Media
ISBN: 140205680X
Category : Technology & Engineering
Languages : en
Pages : 266

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Book Description
Many authors of this new book were participants at the workshop on diapause in aquatic invertebrates (Pallanza, Italy 2003). This book consists of two major parts: phenomenology of diapause and significance of this adaptation in scientific and practical uses. It combines the theoretical part with the application of knowledge on diapause in the wide spectrum of scientific and applied fields.

Author: Stephan Gollasch
Publisher: Springer Science & Business Media
ISBN: 140205047X
Category : Science
Languages : en
Pages : 329

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Book Description
Maritime canals dissolve natural barriers to the dispersal of marine organisms, providing novel opportunities for natural dispersal, as well as for shipping-mediated transport. This book is the first to assess the impacts of the world’s three principal maritime canals – the Kiel, the Panama, the Suez – as invasion corridors for alien biota. These three canals differ in their hydrological regimes, the types of biotas they connect, and in their permeability to invasions.

Author: M. A. Brunt
Publisher:
ISBN: 9780792324621
Category : Biogeography
Languages : de
Pages : 604

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Book Description

Author: Ingo S. Wehrtmann
Publisher: Springer Science & Business Media
ISBN: 1402082789
Category : Science
Languages : en
Pages : 545

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Book Description
Life began in the sea, and even today most of the deep diversity of the planet is marine. This is often forgotten, especially in tropical countries like Costa Rica, renowned for their rain forests and the multitude of life forms found therein. Thus this book focusing on marine diversity of Costa Rica is particularly welcome. How many marine species are there in Costa Rica? The authors report a total of 6,777 species, or 3. 5% of the world’s total. Yet the vast majority of marine species have yet to be formally described. Recent estimates of the numbers of species on coral reefs range from 1–9 million, so that the true number of marine species in Costa Rica is certainly far higher. In some groups the numbers are likely to be vastly higher because to date they have been so little studied. Only one species of nematode is reported, despite the fact that it has been said that nematodes are the most diverse of all marine groups. In better studied groups such as mollusks and crustaceans, reported numbers are in the thousands, but even in these groups many species remain to be described. Indeed the task of describing marine species is daunting – if there really are about 9 million marine species and Costa Rica has 3. 5% of them, then the total number would be over 300,000. Clearly, so much remains to be done that new approaches are needed. Genetic methods have en- mous promise in this regard.

Author: Mianping Zheng
Publisher:
ISBN: 9780792340980
Category : Biology
Languages : en
Pages : 294

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Book Description

Author: National Library of Medicine (U.S.)
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1360

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Book Description
Includes subject section, name section, and 1968-1970, technical reports.

Author: Lauchlan H. Fraser
Publisher: Cambridge University Press
ISBN: 113944395X
Category : Nature
Languages : en
Pages : 500

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Book Description
This volume presents the views of leading experts on each of the world's largest wetland systems. This international team of authors share their understanding of the ecological dynamics of large wetlands and their significance, and emphasise their need of conservation.

Author: Richard J. Huggett
Publisher: Psychology Press
ISBN: 9780415154987
Category : Science
Languages : en
Pages : 292

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Book Description
Providing an up-to-date introduction to biogeography, this textbook explains where different animals and plants live, examines why, and investigates how populations grow, interact and survive.