The measured factors are the concentration of alginate, fucoidan, and trace elements. Also, the reproductive stage of the thallus was considered (thallus non-reproductive, with developing reproductive structures, and reproductive)

I am considering doing a PCA to visualize the relationships among all the factors (including arsenic) and PERMANOVA to determine if there are differences between the possible clusters by reproductive stage.

I thought of making a multiple correlation analysis or using generalized linear models to determine the weight of the cited factors in the concentration of arsenic. However, I am not sure if they are adequate because there is a correlation between arsenic and at least some trace elements.