How to interpret IndVal value?

11 July 2023 1 6K Report

Hello, could someone help on how to interpret an IndVal value? I have run an Indicator Species Test in PAST (I have no Primer and R doesn't take missing values, I was only able to run my data in PAST) and it has given me results with .30 or below as significant. Is there a cut-off of value for IndVal? Is .30 low? Does "low value" mean it is not an indicator species of a group? I have scoured the internet for an answer and have not found any. Thank you!

Andrew Paul McKenzie Pegman

I couldn't find anything either, but 0.3 seems a reasonable cut-off, since it reflects mid-range products of fidelity x specificity values. So I would stick to 0.3. But the significance is a different thing, being based on statistical comparisons between IndVal values :)

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