Hi Brian, EnviroNetrs,

Still haven't found the article on organisms in the upper (not sub) ocean that 
may have been involved with a huge previous Global Warming spell, YET I 
found this one that I thought my interest you since you are an expert on 
Ozone.  You might already have it. For others it should be interesting to see 
some of the science involved.

http://gsa.confex.com/gsa/2005ESP/finalprogram/abstract_88582.htm

<The spores and pollen of terrestrial land plants can increase their investment 
in UV-B screening pigments when exposed to elevated levels of UV-B radiation. 
Here, we report an increase in UV-B protecting pigments from a historical 
record of the spores of Lycopodium magellanicum growing in South Georgia and 
exposed to a progressive thinning of stratospheric ozone and a corresponding 
increase in UV-B radiation. Our data records a strong three fold linear increase 
in the concentration of UV-B protecting pigments in response to a 14% 
thinning of the ozone column. Our results were obtained using micro FT-IR 
analysis of sporopollenin, which is readily preserved in the fossil record. 
Therefore, this newly identified response offers a potential tool for 
investigating natural changes in the stratospheric ozone layer and UV-B flux 
over geological time. 

We are initially targeting the Permo-Triassic boundary for further investigation, 
as recent work has suggested a global collapse in the stratospheric ozone due 
to the emplacement of the Siberian Traps. This hypothesis can now be 
thoroughly tested using a combined approach, involving the examination of 
extant plants subjected to experimentally manipulated UV-B radiation, the 
geochemical study of fossil spores and pollen and the long-term modelling of 
stratospheric ozone. 
 
Earth System Processes 2 (8-11 August 2005) 
 
YiEngr, MA/NY DDave
Yours in Engineering, Dave