In 2016 I started thinking about using sum to zero contrasts and wrote a brief blog post about them. Someone read it! I got this email the other day:
Thank you for this post. I have difficulties understanding it though because the text below the first R output seems not to match with the model output. At first, one cannot see which species is species1,2 etc. Second the numbers are also not correct… Would be cool if you could check it and correct it because then it would be a useful post!