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Managing reindeer lichen during forest regeneration procedures

linking Sami herders' knowledge and forestry

Roturier, Samuel (2009). Managing reindeer lichen during forest regeneration procedures. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2009:84
ISBN 978-91-576-7431-9
[Doctoral thesis]

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In northern Sweden, conventional forest regeneration procedures applied in modern commercial forestry can disturb terricolous lichen (Cladina spp.) pastures. This has become a source of conflicts with Sámi reindeer herders. The overall aim of this thesis was to investigate forest regeneration strategies that may minimise the disturbance to, and promote the regeneration of, reindeer lichen pastures. The Sámi herders’ practices and knowledge related to the lichen resources were also analysed. Effects of gentle soil preparation methods on the re-establishment of lichen cover, reindeer grazing and establishment of Pinus sylvestris planted seedlings were studied in a field experiment. Using the HuMinMix-technique to mix the lichen mat with humus and mineral soil (humix-substrate), was found to promote lichen mat recovery more effectively than conventional scarification. Seedling establishment was highest for mounding and tracks with mineral soil. Rates of seedlings mechanically damaged, possibly caused by reindeer trampling in winter, indicates that planting on densely grazed areas should be avoided to minimize sources of conflict and to prefer either direct seeding or natural regeneration instead. According to a survey, complete re-establishment of the lichen mat after soil preparation was estimated to take about one decade on humix-substrate, compared to probably more than five decades following conventional harrowing. Possibilities for artificial dispersal of reindeer lichen, e.g. in areas disturbed by conventional soil preparation, were also studied. The substrate was identified as a key factor for lichen establishment. In this regard, mineral soil was identified as a poor substrate for reindeer lichen immobilization, while milled organic materials, such as moss, were suitable substrates for lichen immobilization and growth. All dispersal methods tested resulted in lichen establishment, but transplanted lichen cushions were heavily depleted by reindeer grazing, while fragmented lichen thalli were much less affected. A study based on ethnolinguistics demonstrated that whereas the Western use of the word ‘pasture’ is often associated with a specific plant community, Sámi herders’ understanding of the word (guohtun in Sámi) also incorporates the effect of snow on grazing. Sámi herders use their knowledge of the effects of forest trees and other vegetation on snow conditions, to strategically plan reindeer grazing during winter. Sámi herders’ knowledge of winter pastures should therefore be integrated with information on the effects of forest regeneration procedures on stand development to develop strategies that meet the needs of both commercial forestry and the reindeer herders.

Authors/Creators:Roturier, Samuel
Title:Managing reindeer lichen during forest regeneration procedures
Subtitle:linking Sami herders' knowledge and forestry
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2009
Number of Pages:71
ALLI. Roturier, S., Bergsten, U. (2006). Influence of soil scarification on reindeer foraging and damage to planted Pinus sylvestris seedlings. Scandinavian Journal of Forest Research 21(3), 209-220. II. Roturier, S., Bäcklund, S., Sundén, M., Bergsten, U. (2007). Influence of ground substrate on establishment of reindeer lichen after artificial dispersal. Silva Fennica 41(2), 269-280. III. Roturier, S., Roué, M. (2009). Of forest, snow and lichen: Sámi reindeer herders’ knowledge of winter pastures in northern Sweden. Forest Ecology and Management 258(9), 1960-1967. IV. Roturier, S., Bergsten, U. (2009). Establishment of Cladonia stellaris after artificial dispersal in an unfenced forest in northern Sweden. Rangifer 29(1), 39-49 V. Roturier, S., Sundén, M., Bergsten, U. Re-establishment rate of reindeer lichen species following conventional harrowing and HuMinMix soil preparation in Pinus-lichen clear-cut stands: a survey in northern Sweden. Manuscript
Place of Publication:Umeå
ISBN for printed version:978-91-576-7431-9
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:forestry, regeneration, lichenes, reindeer, site preparation, pastures, soil scarification
Keywords:Artificial dispersal, Cladina, Guohtun, HuMinMix, Soil scarification, Reindeer pastures
Permanent URL:
ID Code:2203
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: Samuel Roturier
Deposited On:14 Dec 2009 00:00
Metadata Last Modified:02 Dec 2014 10:16

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