Hi Friend and colleague,

Anybody is working in field of algae can respond to me. I had query about Pamer index. 1969 and Shannon index .

Which index is better for studying water pollution in relation to algae

Because some of research article showed use of

Staub et. al. (1970) : shannon diversity is based on diversity index D

3.0 - 4.5 : Slight pollution

2.0 - 3.0 : Light pollution

1.0 - 2.0 : Moderate pollution

0.0 - 1.0 : Heavy pollution

Wilhm and Dorris (1968) proposed the following relationship between diversity index (D) and pollution status. D Condition

> 3 Clean water

1 - 3 Moderately polluted

< 1 Heavily polluted

Trivedi (1980 and 1981) on correlation of diversity index (D) and the degree of pollution as follows : Condition

> 4.0 : Clean water

3.0 - 4.0 : Very light pollution

2.0 - 3.0 : Moderate pollution

< 2.0 : Heavy pollution