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Upper Midwest Environmental Sciences Center
folder Long Term Resource Monitoring Program
spacer tree Vegetation Data - Graphical Vegetation Database Browser

about ltrmp vegetation componenthelp page

Query For Percent Frequency

 

Stratum

Species / Life Form

table of pools and the strata they contain

Pool 4 2003 does not include backwater isolated or Lake Pepin Stratum.

Percent frequency is a measure of how often a species is encountered. It is calculated by dividing the number of sites where a species occurs by the total number of sites sampled and multiplying by 100.

 

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Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://umesc.usgs.gov/data_library/vegetation/graphical/percent_frequency_query.shtml
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified: December 31, 2012