R. M said:I am currently reading Wild Brews: beer beyond the influence of brewers yeast - Jeff Sparrow.
The other books I have from the same "Culture and Craftsmanship in the Belgian Tradition" series are also well worth reading:
"Farmhouse Ales" by Phil Markowski, which deals with Saisons and Bier de Gardes.
"Brew Like a Monk" by Stan Hieronymus, which deals with trappist and abbey ales.
R. M also said:I
had originally thought about trying to sweet talk a Pajottenland lambic
brewer into sparing me at least some wood from one of their casks - but
having to fumigate in order to get it back to Australia would mitigate
this.
How much do you think the terrain/natural environment plays in the quality/outcome of the lambic or is this marketing spin?
Considering how rapidly yeast and bacteria can mutate it is highly likely that most of the lambic and trappic brewers have considerably different strains. Some of the trappist breweries are so protective of their strains of yeast that they use a different yeast to bottle condition the beer with so that nobody can culture their distinct strain.
Whitelabs and wyeast both provide yeasts containing Brettanomyces strains, as well as lactobacillus and pediococcus bacteria which you can use to produce a lambic style beer. I have heard of second hand wine casks being inoculated with B. lambicus or B. bruxellensis by home brewers to produce a more authentic lambic style beer.
However, the nuances between lambic and trappist beers are also due to other genera of yeasts such as candida/pichia, and bacteria such as enterobacteria (including escherichia coli 'fecal coliforms' for example)
. Supposedly there are over 80 different yeasts and bacteria found in the air around Belgium that contribute detectable flavours to their beers. These are so important that sour beers produced outside Pajottenland are not considered to be true lambics as they have a different range of yeast and bacteria strains.