Raymond W. Arritt wrote:
> Alastair wrote:
>> Yes, I gave you a bum steer referring to grasses. What I should have
>> said was that the evolution of the C4 pathway could have been the
>> cause or a contributing factor leading to the current Pliestocene ice
>> age.
>> http://en.wikipedia.org/wiki/C4_carbon_fixation
>
> The C4 mechanism confers an advantage at low CO2, so it's more likely
> that changes in C4 abundance during the Plasticine were driven by
> fluctuations in CO2 than the other way around.
I understand that interpretations of that era are still quite malleable.
James
(sorry, it's a holiday tomorrow so today is an official Friday)
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