COMING SOON (but likely just links to smarter people's web pages!)
Multicollinearity and why you should care (not just about community ecology, but IMPORTANT)
Good resources on using and interpreting ordination:
https://www.davidzeleny.net/anadat-r/doku.php/en:ordination
http://ordination.okstate.edu/
http://dmcglinn.github.io/quant_methods/lessons/multivariate_models.html
https://sites.google.com/site/mb3gustame/home
Using package vegan :
https://rpubs.com/an-bui/vegan-cheat-sheet
Structural Equation Modeling
https://stats.oarc.ucla.edu/r/seminars/rsem/