26/08/14 - 28/08/14
Limnology was originally defined as the science of lakes although it has now been extended to cover all open non-marine waters. In this introductory course we shall concentrate on lakes and use nearby Malham Tarn for practical work.
An understanding of lakes is only possible with reference to physics, chemistry and biology. We explore, in simple terms, the important physical processes in lakes, namely their stratification, the formation of waves and the penetration of light. One of the most important chemical factors, having a large impact on organisms, is the concentration of dissolved oxygen. We shall conduct oxygen measurements on the Tarn waters, plus some other chemical tests and see how these relate to lake organisms. Most limnological research is related to biology. This course will concentrate on the organisms that live within the water column and will involve sampling phytoplankton and zooplankton from a boat. The organisms will be examined microscopically and the results discussed in the light of the chemical analyses. Finally, consideration will be given to the origins of lakes and their evolution with reference to the historic evidence obtained from lake sediments.
This course is suitable for all ages and aims to provide an introduction to the fascinating science of lakes and the means by which they can be studied with the minimum of equipment. No previous knowledge of lakes is required. Some boat work will be necessary but is not obligatory.
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