These vivid colours are caused by a survival mechanism within the trees leaves…
Sciencemadesimple at Concordia University have a very clear explanation of the chemistry involved.
Just search for “leaves autumn sugar colour”.

Like this:
Like Loading...
Related
March 23, 2011 at 8:31 pm
And how does Spring seem to you, now that it is here?
March 24, 2011 at 9:03 am
Very vivid, in a blaze of pinks and yellows.In fact, we are just back from Autumn in Australia, so the change in the seasons is a bit of a visual shock.Many thanks for taking time to post, Walls.Regards, M.