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Re: Methane production
Furthermore, why didn't the near extermination of the North American Bison also
produce a mini-cooling event? There were tens of millions of bison roaming the
Great Plains, and within 50 years their numbers were reduced to a few hundred
animals in Yellowstone Park.
The number of cattle that "replaced" them was only a miniscule percentage of
the original number of bison.
Ironically, according to climatologists, the Earth was coming *out* of the
Mini-Ice Age around the time that we were beginning to "cleanse" the bison from
---------- Original Message ----------
From: Dann Pigdon <email@example.com>
Subject: Re: Methane production
Date: Fri, 04 Jun 2010 08:29:13 +1000
On Fri, Jun 4th, 2010 at 1:29 AM, "Richard W. Travsky" <firstname.lastname@example.org>
> When hunters arrived in North America and drove mammoths and other
> mammals to extinction, the methane balance of the atmosphere could
> changed as a result, triggering the global cool spell that followed.
> large grazing animals would have produced copious amounts of methane,
> 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
GIS Specialist Australian Dinosaurs
Melbourne, Australia http://home.alphalink.com.au/~dannj
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