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Compare results obtained in former papers.   McArthur (1955) were the first researcher to recognize the important role of Shannon’s entropy in ecological studies. In spite of the popularity of Shanon's Information  as the base for  a measure of community diversity, its interpretation in terms of unpredicitability related with high diversity and its relations with community stability have been a difficult point of understanding and agreement among ecology scientifics. According with Anad and Orlici (1996) measuring the complexity of a biological community from its randomness and unpredictability fails to adequately capture it (Ricota, **).