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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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BiologieThema 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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