To seed or not to seed in alpine restoration: introduced grass species outcompete rather than facilitate native species

  • Published source details Hagen D., Hansen T.I., Graae B.J. & Rydgren K. (2014) To seed or not to seed in alpine restoration: introduced grass species outcompete rather than facilitate native species. Ecological Engineering, 64, 255-261.


This study is summarised as evidence for the following.

Action Category

Sow grass seeds

Action Link
Grassland Conservation
  1. Sow grass seeds

    A site comparison study in 2010 on 10 road verges in the Dovre Mountains, Norway (Hagen et al. 2014) found that sowing grass seeds increased vegetation cover overall but reduced native vegetation cover. Total vegetation cover was on average higher in areas where a commercial grass seed mixture was sown (85–96%) than in areas where no seeds were sown (65–90%). The opposite was true for native vegetation cover (seeded: 48–72%; unseeded: 65–74%). In 1989, ten road verges were sown with a commercial seed mixture containing four non-native grass species at a rate of 7 kg/1,000 m2. Commercial fertilizer was also added at a rate of 50 kg/1,000 m2. Ten other areas on each of the 10 road verges were not seeded. All sites were grazed occasionally. In July and August 2010, the abundance of plant species was recorded in five 0.5 × 0.5 m plots in each of the seeded and unseeded areas.

    (Summarised by: Anna Berthinussen)

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