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Re: Methane production

On Fri, Jun 4th, 2010 at 1:29 AM, "Richard W. Travsky" <rtravsky@uwyo.edu> 

> http://www.newscientist.com/article/mg20627623.300-did-early-hunters-cause-climate-
> When hunters arrived in North America and drove mammoths and other
> large 
> mammals to extinction, the methane balance of the atmosphere could
> have 
> changed as a result, triggering the global cool spell that followed.
> The 
> large grazing animals would have produced copious amounts of methane,
> a 
> potent greenhouse gas, from their digestive systems. 
> [...]

Surely if large herbivores got rarer, wouldn't something else simply be eating 
the vegetation they 
would have otherwise consumed (like lots of smaller herbivores)? A certain 
quote from Baruch 
Spinoza comes to mind. :-)

And if not, wouldn't all that 'extra' vegetation eventually decompose to form 
methane anyway?


Dann Pigdon
GIS Specialist                         Australian Dinosaurs
Melbourne, Australia               http://home.alphalink.com.au/~dannj