Home > Preview
The flashcards below were created by user
on FreezingBlue Flashcards.
Limiting Factor in phosphorus cycle
P is generally the nutrient limiting primary productivity of freshwater marshes, bogs, and lakes
N is generally the limiting nutrient in salt marshes and many forests
Limiting factor- a material whose supply is less than optimal for growth and reproduction of organisms and which, if the supply is increased, results in increased production
Liebig's law of the minimum
the essential material most closely approaching a critical minimum will tend to be the single limiting nutrient under a steady set of conditions
What elements or compounds tend to precipitate phosphate?
precipitation by Fe3+, Al 3+ or Ca 2+
al3+ + H2PO4- +2H20 = 2H+ +Al(OH)2H2PO4
3Ca2+ + 2H2PO4= Ca3(PO4)2 + 4H+
Reduction-oxidation and Fe/P release relationship
- Fe(III)-->Fe(II) soluble
- -Releases PO4 bound to Fe hydrous oxides and other forms
- Soluble P may be "trapped" by Fe(III) forms as it diffuses into oxidized zone
- Al may still bind P in anaerobic zones
What would you like to do?
Home > Flashcards > Print Preview