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The Chironomidae - Biology and ecology of non-biting midges (Paperback, Softcover reprint of the original 1st ed. 1995)
Loot Price: R13,407
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The Chironomidae - Biology and ecology of non-biting midges (Paperback, Softcover reprint of the original 1st ed. 1995)
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The dipteran family Chironomidae is the most widely distributed and
frequently the most abundant group of insects in freshwater, with
rep resentatives in both terrestrial and marine environments. A
very wide range of gradients of temperature, pH, oxygen
concentration, salinity, current velocity, depth, productivity,
altitude and latitude have been exploited, by at least some
chironomid species, and in grossly polluted environments
chironomids may be the only insects present. The ability to exist
in such a wide range of conditions has been achieved largely by
behavioural and physiological adaptations with relatively slight
morphological changes. It has been estimated that the number of
species world-wide may be as high as 15000. This high species
diversity has been attributed to the antiquity of the family,
relatively low vagility leading to isolation, and evolutionary
plasticity. In many aquatic ecosystems the number of chironomid
species present may account for at least 50% of the total
macroinvertebrate species recorded. This species richness, wide
distribution and tolerance to adverse conditions has meant that the
group is frequently recorded in ecological studies but taxonomic
difficulties have in the past prevented non-specialist
identification beyond family or subfamily level. Recent works,
including genetic studies, have meant that the family is receiving
much more attention globally."
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