Originally Posted by observant_imp
My copy of the Walstad book arrived today.
It says allelopathy has been reported in 97 species of aquatic plants.
Doesn't say it occurs (in living systems), if you grind up plant juice and put in a small culture dish, that is not the same as a living plants growing together.
Allelopathy has never been show in natural aquatic system to date.
There have been exhaustive literature reviews digging for it, I've written research papers on it while at UF as a Grad student.
I've never seen any evidence for it, I've thought I have, but I later went back and was unable to reproduce the effect and others confirmed the suspect was not ocurring.
If you see it, it's more an issue of not having enough nutrients for species X vs species Y. Species X may simply need more than Y, no allelopathy involved.
As far as algae = plant allelopathy, this is even less likely.
What are the odds that all 300 species of aquatic plants produce the same similar effect with the wide array of chemical compounds produced?
A watrer change or carbon can be added to remove the compound as a control(it'll remove other nutrients also so that must be taken into account).
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