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Query Percent Cover

 

Stratum

Species / Life Form

Year Range   to



table of pools and the strata they contain


Note: Pool 4, 2003 data does not include backwater isolated and Lake Pepin strata

Percent cover estimates the average coverage of rooted floating leaf and emergent species. Percent cover is estimated using the following formula:

Percent Cover Formula

where Lj denotes the midpoint of the cover rating range at the jth site and m is the number of sampled sites in the given stratum. Midpoints of the ranges associated with our six cover rating categories are 0%, 10%, 30%, 50%, 70% and 90%.


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/percent_cover_query.shtml
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Page Last Modified: November 2, 2009