Hi everyone,
I performed multiple regression and a nonmetric multidimensional scaling analyses in order to understand which environmental factors have the biggest impact on the abundance of several nitrogen cycling genes. From what I have been reading, the vectors fitted onto the ordination plot are calculated performing some kind of correlation analysis, so I was hoping to obtain similar results; however they seem to contradict each other.
Why is that?
Here are my multiple regression analysis results and the NMDS plot (colors represent the sampled stations and the shapes represent the sampled depth)
In my opinion, from your table and figure, your two results are consistent instead of contradictory.
Guangshan is correct...your results largely support each other. When a vector points toward a gene, it is positively correlated with it, and when a gene is ordinated opposite of where a vector points, it is strongly negatively correlated. Thus, the table and the NMDS largely agree.
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