- Jan 23, 2005
MarmoteX;33745 said:A limiting factor is not only the one that is on a low concentration, but can be the one in a high concentration.
Competition between algae and plants is not exactly the type of competition there is between species on the same niche. So I guess there wouldn`t be a total "displacement" of algae. For example potassium is an inhibitor in some algae reproduction (i don´t remember where i read it).
Mr Barr have you done experiments on algae and high concentrations of nutrients?. Like the one you did for plants for the EI. It would be interesting to see how concentration gradient of any nutrient plays roll on algae development.
You are referring to Shelford's law of tolerances, which addresses the upper inhibiting ranges as well as limiting ranges(unlike Liebig's law)?
No, not really, but I have not seen much evidence other than for BGA with respect to NO3, PO4 for Green spot, but neither of these are single variables.
Good CO2, organic matter, no BGA to start with etc are all dependent co-variables with thos, so no, I've not done it pre se, however, I've also never seen any evidence that the situation you mention exists either
I need observations 1st, and then ........can make hypothesis to test.
In algal cultures without plants, that is another question and situation.
But.........if you remove plants, it's not really applied to aquatic plants
You have to be careful applying one reference broadly to algae, like the K+ inhibitor, and b specific to the species that cause us issues, that narrows things down to 10-12 species pretty much and they are all FW warmer water species etc.