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Samenvatting 18de Hoofdstuk Elements of Ecology 9th Edition

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Samenvatting van het 18de hoorcollege van 'Ecologie: organismen in hun milieu' en het bijbehorende hoofdstuk in Elements of Ecology 9th Edition, over de biogeochemische cycli

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18. Biogeochemische cycli
Samenvatting


INLEIDING

 Input:
- Erosie gesteenten (bv. graniet)  wel verlies van enkele nutriënten
- Atmosferische input

 Output: sedimentatie (bv uit de zee)  CaCO3 op de bodem



1. DE 2 TYPES VAN BIOGEOCHEMISCHE CYCLI

 Gas: belangrijke poel in de atmosfeer of in de oceanen
- N, O, C

 Sedimentair: belangrijke poel in parentale rots
- P, K
- Rots fase  zout fase  rots fase  …
o Gaan in de zoutfase, waardoor het wordt opgelost in de zee. Nu kan het opgenomen
worden. Na een lange periode kan het terug in de rotsfase gaan

 Water is erg belangrijk! Het maakt nutriënten beschikbaar voor organismen



2. NUTRIËNTEN INPUTS

 Atmosfeer
- Natval  regen
- Droogval  zandstormen
- Doorval  vooral in een interne cyclus, zoals een boom
o Niet echt een input, maar bevat wel veel meer nutriënten
- Kracht input  bliksem

 Parentale rots
- Fysieke verwering
- Chemische verwering
- Biologische verwering




3. NUTRIËNTEN OUTPUTS
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