Sugar
Phloem transports sugar from a sugar source to a sugar sink.
The number of primary consumers would increase because they would not get eaten.
The genetics of red hair appear to be associated with the melanocortin-1 receptor (MC1R), which is found on chromosome 16. Eighty percent of redheads have an MC1R gene variant.
I cannot find this source for this I'm sorry. I meant to add it but I lost the site
