Vegetation change in West-Norwegian coastal heathland - effects of the management methods fire and sheep grazing in rehabilitation of old heathland on Lurekalven in Hordaland

azote botanical composition browsing carga contaminante charge polluante clima oceanico coasts composition botanique comunidades vegetales conservation du paysage controlled burning costa dynamique des populations ecological succession ericaceae field experimentation fire ecology fires grazing incendie incendios lande landscape conservation moors nitrogen noruega norway oceanic climate ovin ovinos pastoreo plant communities pollutant load population dynamics quema controlada ramoneo sheep site factors