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Ecological and Environmental Change Research Group
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Defining lake reference states

Gaute Velle

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Defining reference states for lakes in Norway

  • The ecological quality status of all waters should be assessed according to the
  • The status classes are defined by their deviation from a reference level
  • The reference, pre-perturbation conditions are often lacking or arbitrarily set
  • Therefore the reference state needs to be defined

Using palaeolimnological methods, especially chironomid analysis, the status of the lake can be traced back in time to give a reference baseline status.

Definere referansetilstand for innsj酶er i Norge

  • Den 酶kologiske kvaliteten status for alle farvann b酶r vurderes i henhold til
  • Status klasser er definert av deres avvik fra en referanse-niv氓
  • Referanse, pre-perturbasjons forholdene ofte mangler eller vilk氓rlig satt
  • Referansetilstand m氓 derfor defineres


Ved hjelp av palaeolimnological metoder, spesielt chironomid analyse, kan statusen til insj酶 f酶res tilbake i tid for 氓 gi et referansetilstand.