" On the other hand, biological systems can reproduce from very small
 spores, and generate a real lot of them. Again, cf the early Chtorr  books"

One need not even look to fiction.  Read up on the problem of Eurasian
Milfoil in Minnesota lakes and streams.  We have many examples of invasive
species in the Earth's biosphere already, and can use them as a baseline
model for our understanding of potential alien biotic invasions.

-- 
Si hoc legere scis, nimium eruditionis habes.
--
jl hatlen linnell - [email protected]
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