Books in the Monographiae Biologicae series

From single-celled organisms in Black Sea sand to endemic cave crustaceans, from mountain glacial relict insects to the most diverse bird fauna in Europe, the fauna of Bulgaria has been a subject of study for more than a century.

How many marine species are there in Costa Rica? 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. Indeed the task of describing marine species is daunting - if there really are about 9 million marine species and Costa Rica has 3.

But it was only after the Second World War that this interest could be intensified, the lake now being an alkaline, turbid body of water confined by the vast areas of Phragmites which had come into existence after the lake last dried out in 1868.

What have we learnt about the Nile since the mid-1970s, the moment when Julian Rzoska decided that the time had come to publish a comprehensive volume about the biology, and the geological and cultural history of that great river?

2 In China, there are more than 2,759 lakes with surface area greater than 1km , and 2 the total lake area is 91,019km . Lake Taihu is the third largest freshwater lake in China, with an area of about 2 2338km and a mean depth of 1.