Phosphorous Cycle: Basics: Dr.A Flashcards
1
Q
Why is PHOSPHATE ESSENTIAL?
A
Makes up:
- ATP
- Phospholipid –> Cell Membrane
- DNA / RNA Molecules
2
Q
Why does the Nature of the PHOSPHOROUS CYCLE LIMIT plant and animal GROWTH?
A
- PO4 is found in LOW CONC.
- ESPECIALLY in AQUATIC systems
3
Q
Why is the RELEASE of PHOSPHATE IONS so SLOW?
A
- Because WEATHERING is a very SLOW process
- Which is the MAIN cause of the RELEASE of PO4
4
Q
What can INCREASE the SA of a plants ROOTS?
A
Mycorrhizae
5
Q
What OCCURS when WEATHERING happens?
A
- PO4 in SEDIMENTARY ROCKS
- “LEACHES” into SOILS and WATERWAYS
6
Q
How are PHOSPHATES absorbed into the ECOSYSTEM of a RIVER?
A
- AQUATIC PLANTS such as ALGAE absorb PO4
- Which is then MOVED UP the FOOD CHAIN through FEEDING
7
Q
How do SEA BIRDS contribute to the PHOSPHOROUS CYCLE?
A
- Their shit has HIGH PO4 content
- Which is RETURNED in LARGE amounts to SOILS & COASTAL AREAS
- Can be used as a NATURAL FERTILISER
8
Q
A
