Re: alleochemicals V1 #39
<(Darn those complex systems!  I will point out that
<for VERY arid climates, vegetation may be so far apart
<that competition does not exist between individuals or
<among populations, and allelochemicals thus have no value;
<the vegetation is thin because harsh conditions "thin" the

The reason vegetation is so far apart in VERY arid climates is
often due to alleochemicals. There is so much competition for a
very scarce resource, water, that plants actively discourage any
other plants from growing within the sphere of influence of their
roots, not even their own offspring are permitted to grow in this