The Role of SHE Analysis in Definig Species Diversity Components of birds in Hasan langi, kolahi and tiab estuaries

Numerical index of diversity, Combination of species richness and evenness are two important components But one of the Important problems of This indexes is this Do not separate the contributions of these two components is the numeric index value. One of the most effective and efficient methods to compute Contribution of these two components is the numeral diversity of SHE analysis The method of calculating the two components permits. This review is from mid- winter census water birds of Hasan langhi(Namaki), kolahi and tiab estuaries During the six years(1385-1390) In order to clarify Factors influencing the Numerical index of diversity was used. Calculation of diversity indices showed The variation in tiab, Hasan langhi and kolahi estuaries In order to 1388,1388,1389 Higher than other years, Shannon Wiener diversity index, Pielou J Richness index was the same frequency as and Evenness index, where (H'=3/15),(44) and (j'=0/75);( H'=3/2),(41) and (j'=0/79);( H'=2/99),(37)and(j'=0/74) Respectively. The results indicate that the factors influencing the numerical index variation is uniform in all three components of the estuary. In this period of intense change the landscape for birds Been observed in three assorted which means that the species composition have been relatively consistent.