[Coral-List] R code for power analysis of Coral Point Count datasets

Friedman, Kim Kim.Friedman at dec.wa.gov.au
Tue Mar 29 21:52:59 EDT 2011

Does anyone have any R code to look at the power of tests (get a power curve) to assist in decisions on sampling level required to detect significant changes in coral communities (cover, genus composition etc)

In addition to understanding the power attained to detect significant differences from sites records and replicates (nested in sites), I would also like to test how many images per replicate to use and how many points per image will optimise the test for detecting changes in long term repeat sampling designs.

If anyone knows of any code that I can share or is interested in assisting me in getting some code written, can you please let me know.

Kim Friedman
Principal Research Scientist
Western Australian Marine Monitoring Program
DEC Marine Science Program

Dept Environment & Conservation
17 Dick Perry Avenue, Kensington
Western Australia  6151
Tel: (61) 08 9219 9805
Mob: 0400 120 972
kim.friedman at dec.wa.gov.au

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