Seedling survival and establishment in small canopy openings in drained spruce mires in Northern Finland

• DOI: 10.14214/sf.97
• Publication Date: 2014-03-11T08:36:18Z
• Authors: Hannu Hökkä; Jaakko Repola; Mikko Moilanen; Markku Saarinen
• Keywords: Mire; Natural regeneration

<ja:p>A large proportion of drained spruce mire stands is currently approaching regeneration maturity in Finland. Traditional methods with effective site preparation and planting generally result satisfactory seedling also mires. However, natural may be more appropriate protecting watercourses minimizing costs. We studied the survival advance growth establishment new seedlings small canopy openings that were cut at three different diameters two experimental Northern Finland (Tervola Oulu) 2004. The number was repeatedly surveyed from five circular plots (one 10 m four 5 size) located within opening. Advance which survived cutting separated surveys. density on average 9000 ha after cutting, it decreased by 30% during five-year monitoring period (2006–2010) due to mortality. increased rapidly years openings. In 2010, 11 000–26 000 Tervola 12 000–16 000 Oulu observed. size opening had no clear effect result. birch time Tervola. results show Norway regenerates naturally mature stands.<ja:sup>2</ja:sup><ja:sup>2</ja:sup><ja:sup>–1</ja:sup><ja:sup>–1</ja:sup><ja:sup>–1</ja:sup></ja:p>