THE SEASONAL VARIATION OF ABIOTIC AND BIOTIC FACTORS IN NATURAL, TRANSFORMED AND ARTIFICIAL AQUATIC ECOSYSTEMES
Abstract
Abiotic factors are very important in the aquatic ecosystems because they create the frame in which the organisms develop. In order to evaluate the seasonal variation of the abiotic and biotic factors, three different aquatic ecosystems were investigated: a natural ecosystem, a transformed ecosystem and an artificial ecosystem. The physical, chemical and bacteriological parameters of water, A Chlorophyll, as well as the aquatic invertebrates from surface and benthic zone were determined. A comparative analyze of the seasonal dynamics in the three lakes shows us that the artificial ecosystem is the less stabile of all. The biodiversity of aquatic ecosystems is maximal in the natural ecosystem, followed by far by the transformed and artificial ecosystems
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