Carlyle,
I'd have to guess that the ORIGINAL turf at St A is primarily what is STILL there today! Given the minimalistic approach to 'turf management' practised at our old Links sites, and the fabulous playing qualities of the old Bents and Fescues, Allan Robertson and Old Tom himself would have been loath (and /or too mean!) to dig it all up and re-seed with Tifdwarf/Bermuda/Paspalum/insert other latest grass fad or any other 'modern' contrivance!!!
Cue my Agronomist buddies or, better still, B Phillips, esq......go on, call me a liar!
FBD.
PS A quote from the Robert Price book that Rich mentions:
'Since most Scottish dune systems are less than 6,000 years old and, since the dunes were often used as settlement sites by early man, it is likely that there has always been some human interference in the dune system. Dunes are very rich in species of plants and animals. A survey of natural and introduced vascular plants on 43 of the more important dune systems in Britain showed that over 900 species occur on them........'
PHEW!!!