Lake Kivu

Author: Jean-Pierre Descy
Publisher: Springer Science & Business Media
ISBN: 9400742436
Format: PDF, Docs
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In the heart of Africa, a unique lake attracts the attention of scientists since the beginning of the 20th century. At the foot of the Virunga volcano chain, Lake Kivu harbors a vast amount of dissolved carbon dioxide and methane, making this lake the most dangerous lake on Earth. But the lake furnishes also many goods and services for surrounding populations and may soon become the most important energy supplier in the area. At the beginning of gas exploitation, the time has come for gathering the large amount of scientific information acquired during past and present research on Lake Kivu. The eleven chapters cover many aspects of the physics, geochemistry and biology of the lake, with a particular focus on the unique physical and geochemical features of the water column and on the ecological functioning of the surface waters. The impacts of the introduced fish species and the potential impacts of methane exploitation are also summarized. This multi-disciplinary book may also be used as an introduction to the limnology and biogeochemistry of large tropical lakes, as it covers various aspects of the physics, geochemistry, biology and ecology of the African Great Rift lakes.​

The inland water fishes of Africa

Author: Didier Paugy
Publisher: IRD Éditions
ISBN: 2709924013
Format: PDF, ePub, Docs
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The equilibrium of inland hydrosystems is presently a cause for concern, with species extinction rates there estimated to be 5 times higher than for terrestrial fauna in the 21st century. Urgent measures must be taken to conserve these ecosystems particularly with regard to fishes, which represent an especially rich and diverse evolutionary heritage. Fishes were long unaffected by human activity on the African continent, but anthropogenic pressure has increased in recent decades. Good management of African continental waters is thus of paramount importance in terms of heritage and economics, as fishes are a vital natural resource for the people in sub-Saharan Africa. In view of biodiversity conservation, African fishes are investigated here as a biological model owing to their enormous ecological and genetic diversity. It is essential to know the ecology and structure of various communities, and to understand the impact of human activity. This book discusses the diversity of environments, the origin and evolution of species, survival and adaptive strategies, the structure of fish communities, and the impact of human activity. It also devotes a section to fisheries and fish culture. This ambitious project summarizes the current state of knowledge on African fishes and their populations, highlighting the mechanisms regulating their equilibrium and the causes contributing to their erosion. It is a reference not just for readers involved in African aquatic environments, but for anyone interested in biodiversity conservation in general.

Ecology of Meromictic Lakes

Author: Ramesh D. Gulati
Publisher: Springer
ISBN: 3319491431
Format: PDF, ePub, Mobi
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This volume presents recent advances in the research on meromictic lakes and a state-of-the art overview of this area. After an introduction to the terminology and geographic distribution of meromictic lakes, three concise chapters describe their physical, chemical and biological features. The following eight chapters present case studies of more than a dozen meromictic lakes, showing the variety of physical and biochemical processes that promote meromixis. The result is a broad picture of the ecology and biochemistry of meromictic lakes in tropical and cold regions, in man-made pit lakes and euxinic marine lakes, and in freshwater as well as hypersaline lakes. In the final chapter the editors provide a synthesis of the topic and conclude that the study of meromictic lakes also offers new insights into the limnology of inland lakes. The book appeals to researchers in the fields of ecology, limnology, environmental physics and biophysics.

Communications

Author:
Publisher:
ISBN: 9783510520237
Format: PDF, Mobi
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Nos.1-12 issued as Its Committee on Limnological Methods. Publication, no.1-12.

Erdmessung und Satellitengeod sie

Author: Reiner Rummel
Publisher: Springer-Verlag
ISBN: 3662471000
Format: PDF, ePub, Docs
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Das Handbuch der Geodäsie ist ein hochwertiges, wissenschaftlich fundiertes Werk über die Geodäsie unserer Zeit und bietet anhand von in sechs Bänden zusammengestellten Einzelthemen ein repräsentatives Gesamtbild des Fachgebiets. Satelliten führten zu einer Revolution in der Geodäsie. Erst mit Hilfe von Satelliten wurde die Erdmessung tatsächlich global und dreidimensional. Ozeane und Eisschilde stellen keine Hindernisse mehr dar, sie lassen sich heute mit gleicher Präzision vermessen wie die Kontinente. Verfeinerungen resultieren aus der Kombination von Raumverfahren mit terrestrischen Messmethoden. Damit gelingt es der Erdmessung, fundamentale Beiträge zum Verständnis des Erdsystems und des Klimawandels zu liefern. Voraussetzung für diese Entwicklung sind sehr moderne Messverfahren und Auswertemethoden und deren extrem genaue Verknüpfung in einem globalen erd- und raumfesten Referenzsystem. Im Band Erdmessung und Satellitengeodäsie werden exemplarisch die historischen Wurzeln, methodischen Grundlagen, verwendeten Messverfahren sowie die Forschungstrends vorgestellt.