Volume No. 4 Issue No.: 1 Page No.: 254-257 July-Sept 2009

 

A NEW DIVERSITY INDEX FOR EVALUATION OF ENVIRONMENTAL QUALITY

 

K. Virupaksha*, S. Shrihari, M. N. Madhyastha and K. S. Babu Narayan

Department of Civil Engineering National Institute of Technology Karnataka Surathkal
Srinivasanagar, Surathkal, Mangalore

 

Received on : May 20, 2009

 

ABSTRACT

 

A new diversity index for quantifying the ecological status of any ecosystem was proposed, which was derived from the represented species abundance data. In situations where there is only the data of species or genus abundance is available, the new index is helpful by responding to altered community structure and also to the diversity. This index was derived from mathematical normalization technique, wherein the sum of proportions of all the represented species abundance to the maximum abundant species. The index value can range from zero to maximum (n). Though this index was initially designed to assess species diversity, the implications of this index can be extended in delineating the resilient species and dominant species in any ecosystem. Moreover this simple index can be derived with minimum computational efforts and can be applied universally irrespective of the geographical region, the ecosystem and the community.

 

Keywords : Diversity index, Species abundance, Species dominance, Environmental quality.

 

 

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