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Samenvatting Biologie Thema 7 Interacties organismen en omgeving

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Samenvatting Thema 7 Interacties organismen en omgeving - Biologie 4 ASO

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Thema 7 interacties organismen en omgeving
Uploaded on
July 6, 2021
Number of pages
2
Written in
2020/2021
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Summary

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Biologie
Thema 7: Interacties organismen en
omgeving

Overbemesting
 meer nutriënten woorden aangevoerd dan de planten kunnen
opnemen


- Elk organisme neemt voedingsstoffen op uit omgeving om te groeien /
overleven
- Sommige planten aangepast om te overleven op voedselarme bodem


Doel bemesting?
 Planten voorzien van noodzakelijke anorganische nutriënten
- via compost / stalmest / kunstmest


Oorzaken overbemesting?
 Landbouw
 Dieren die vrij in de natuur leven
- Guanotrofie (= plaatselijke sterke bemesting door vogeluitwerpselen)
- Wortelharen sterven af  nemen onvoldoende water op  boom droogt
uit


Gevolgen overbemesting?
- Verzuring van bodem en water  groei planten stopt bij ongunstige pH
- Eutrofiëring  te veel nutriënten spoelen weg via oppervlaktewater
Gevolgen?
* Algenbloei: nutriënten zijn elementair voor algen  gaan woekeren 
geen licht tot diep in water  onmogelijk fotosynthese  planten sterven
af
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