13.3 - Phosphorus Cycle Flashcards
Why phosphorus is important The movement of phosphorus through ecosystems The role of mycorrhizae in ion uptake
Why is phosphorus important?
It is required for the formation of key biological molecules:
* Phospholipids
* Nucleic acids (DNA and RNA)
* ATP
Where is phosphorus mainly found in the non-living environment?
Sedimentary rock deposits
What form does phosphorus mainly exist in living parts of ecosystems?
Phosphate ions (PO43-) dissolved in water
What is the phosphorus cycle?
Movement of phosphate through ecosystems
What are the key steps of the phosphorus cycle?
Weathering
What is the role of seabird guano?
Transfers phosphates from ocean to land
What are mycorrhizae?
Associations between fungi and plant roots
What are the benefits of mycorrhizae?
Increased root surface area
What do plants supply to mycorrhizal fungi?
Organic compounds like sugars and amino acids
What type of relationship is mycorrhizae?
Mutualism
