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Økologi 2

Definitioner i økologi

TermDefinition
Autotrofe organismer Organismer, som henter deres energi fra solen eller fra uorganiske forbindelser (eks. planter)
Heterotrofe organismer Organismer, som ikke kan danne organisk stof fra uorganiske forbindelser (eks. svampe, dyr)
Fotoautotrofe organismer Organismer, som henter deres energi fra solen og har uorganiske kemiske forbindelser som kulstofkilde (eks. planter)
Primærproduktion Dannelse af organisk stof ud fra fotosyntese
Bruttoprimærproduktion Total mængde stof dannet ved fotosyntese (hvoraf en del går til respiration)
Nettoprimærproduktion Den del af primærproduktionen, som kan føres videre i fødenettet
Primær forurening Forurening med organisk stof
Sekundær forurening Forurening med gødningssaltene nitrat og fosfat
Biomagnificering Opkoncentrering af et miljøfremmed stof op gennem fødekæden
Bioakkumulering Stigende koncentration af et miljøfremmed stof gennem en organismes levetid (eks. en gammel musling)
Oligotrof sø Næringsfattig sø
Dystrof sø Brunvandet sø – farvet af humusstoffer (typisk en skovsø)
Eutrof sø Næringsrig sø
Created by: Esben
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