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spacer tree Vegetation Data - Graphical Vegetation Database Browser

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Diversity Indexes

Two different diversity metrics are offered in the Vegetation Graphical Database Browser, Species Eveness and Species Richness .

Species Eveness
species eveness

Querying for species eveness allows you to see how diverse the pools vegetation species are. It allows you to query based on lifeform and a year range. The diversity index and eveness are calculated using Shannon's diversity index.

Species Richness

Species richness is a measure of the diversity within each study area. The total number of species observed each year is plotted as a time series for each study area.

species richness chart

 

Graphical Vegetation Home Page | About the LTRMP Veg Component | Help Page
Frequency | Abundance Index | Percent Cover | Distribution maps | Species List
Community Composition | Vegetation Species Information | Community Similarity | Diversity Index

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URL: http://www.umesc.usgs.gov/data_library/vegetation/graphical/diversity_metrics.html
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Page Last Modified: October 2, 2007