Results also showed that microbial diversity index H and E showed a trend of increasing under five years of continuous tabacco cropping and then decreasing afterward.

The biodiversity index was slightly lower in the OTC than in the CK.

In this paper,the two important functions of Excel were firstly presented for calculating the biodiversity index;Then how to calculate parameters on biodiversity was described by the example in Excel;At last,the advantage of Excel was indicated in ecological statistical evaluation.

Nine biodiversity indices calculated on the basis of phytoplankton data were studied for their usefulness for eutrophication studies in landscaping water body.

Importance value, species diversity index (Shannon-Wiener Index), evenness index, ecological dominance of the community in relation to thent layers, i.

The author comparatively analyzed flora composition,life form spectrum ,vertical stratification,species diversity index,ecological dominance index and evenness index between an artificial Robinia pseudoacacia community and a herbal shrub community distributing typically at a disturbed slope near residential area in Longquanguan,Fuping County in Taihang Mountain.

The classification of community(fifty-six quadrats belonging to twelve plots) of Huoshan Mountain vegetation in Shanxi Province was carried out by TWINSPAN,and the species diversity at different succession stages was also comparatively analyzed by using species diversity index,richness index and evenness index.