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mass extinctions in the cretaceous and later
A widely circulating news article about a UN report of the Convention
on Biological Diversity stated that humans have caused the biggest
extinction since the demise of the dinosaurs.
They claim that 844 plants and animals are known to have gone extinct
in the last 500 years. I thought that there are several million
different species out there in our Biosphere currently so the 844
number seems tiny to me. I was under the impression that at the end
of the Cretaceous that 75 percent of all species (land and water)
were wiped out. Additionally, haven't several very significant
extinctions occurred later at the end of the eocene and the
Pleistocene that were much more significant than the 1 percent "we"
have killed off.
This news cyclel sounds like more of the psychology described in
"State of Fear" (Michael Chichons latest).
I know that I personally have killed a significant percentage of the
mosquitos/ticks/mice/yellow jackets/black widows/rattlesnakes that I
run into. Durn humans give the rest of the biome no respect I
guess. Harvester ants are being pressured locally too as they
collect fossils and if I see a Harvester Ant hill, it is immediately
I would ask the DML just to set the record straight, what were the
"major extinctions in the last 65 million years and what proportions
of the biota died off during each event?
The link to the Reuters article is: http://today.reuters.com/news/
Frank (Rooster) Bliss