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Biologie Nectar Vwo 6 samenvatting hoofdstuk 16 Ecosysteem en kringloop

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Biologie Nectar Vwo - Samenvatting Hoofdstuk 16: Ecosysteem en Kringlopen * Paragraaf 1: Koolstofkringloop – Reducenten breken organisch af tot anorganische stoffen (mineralisatie). Koolstof circuleert via atmosfeer, hydrosfeer, biosfeer en lithosfeer, en fossiele brandstoffen/methaan beïnvloeden het broeikaseffect. * Paragraaf 2: Stikstofkringloop – Planten nemen stikstof op als nitraat via wortels. Bacteriën in wortelknolletjes helpen hierbij. Eutrofiëring (overbemesting) leidt tot algenbloei, zuurstoftekort en sterfte in water. * Paragraaf 3: Fosforkringloop – Fosfaat circuleert via een korte en lange cyclus (gesteenteverwering, sedimentatie en mijnbouw). Planten nemen fosfaat op via wortelharen of een symbiose met schimmels (mycorrhiza). Indicatorsoorten tonen de milieu- en waterkwaliteit aan. * Paragraaf 4: Gifstoffen en omslagpunten – Persistente gifstoffen hopen zich op in de voedselketen (biologische accumulatie). Verstoringen kunnen een ecosysteem over een omslagpunt duwen naar een nieuwe stabiele fase.


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School year
6
Uploaded on
August 25, 2026
Number of pages
5
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2025/2026
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Summary
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