I am doing a SIMPER analysis (in R) with the values ​​relating to individuals contacted in different reproductive seasons to see how the surveyed bird community has changed, and which species contribute most to this dissimilarity.

I find everything clear, except the p-values. Do the resulting values ​​of the various "p" tell me whether the contribution of that specific species is significantly relevant in the total dissimilarity between the two monitoring seasons? Or do they indicate something else?

A thousand thanks