Abstract

Wesenberg, J., Wischmann, F. & Sandaas, K. 2001. Transplantasjon av stautstarr Carex acutiformis til 11 nye lokaliteter i Oslo SØ – resultat etter 12 år. Blyttia 59: 52-58.
A transplantation of Carex acutiformis to 11 new localities in SE part of Oslo municipality – the results after 12 years.

In 1983 a population of the rare and red listed species Carex acutiformis was detected on the edge of a small tarn which was soon to be destroyed by a planned extension of the city’s waste dump. The municipal environmental office authorised a transplantation of the species to 11 carefully selected, apparently suitable localities in the same area. During the summers of 1995 and 1996 the localities were re-examined, and the species was found to have established itself at 4, and disappeared at 7 of the localities. None of the new populations seemed very vital, and the fertility was obviously rather low. C. acutiformis is a clonal plant, able to fill a suitable microhabitat without sexual reproduction. It is also a robust marsh plant, which is rather easy to transplant. Given these advantages for this particular species, and the low success of the experiment, transplantation generally seems to be a rather unpromising means of conserving threatened plant populations, giving support to the view that plant populations should be protected in their natural habitats if possible.

Jan Wesenberg, Norsk Botanisk Forening, Botanisk museum, NHM, Postboks 1172 Blindern, 0318 Oslo.
Finn Wischmann, Botanisk museum, NHM, Postboks 1172 Blindern, 0318 Oslo
Kjell Sandaas, Oslo kommune, Helsevernetaten, avd. for miljørettet helsevern, Maridalsveien 3, 0178 Oslo

Blyttia 59 (1)
Blyttias hjemmeside
Lagt ut 24.08.2001 JW