Soil-Driven Timberline of Spruce (Picea abies) in Tanaelv Belt–Lapland Granulite Transition, Finland

Figures & data

FIGURE 1. Airborne magnetic total intensity map of northern Finland. The study area is shown by a black rectangle. Norway spruce timberline (solid lines) (taken from Sihvo, 2002) is based on 30% crown coverage. Pine timberline (dashed lines) (adopted from Juntunen et al., 2002) is based on the same crown coverage. LG = Lapland Granulite Belt, TB = Tanaelv Belt (Marker, 1985), LGB = Lapland Greenstone Belt, S = Sarmitunturi, P = Pallastunturi

FIGURE 2. Compilation of airborne gamma-ray (potassium window) data and digital elevation model of the study area. Measured sites are at the numbered black dots (see Table 1). Main roads presented as black lines

FIGURE 3. Density plot of soil gamma-ray (A), soil dielectric (B), and soil electrical conductivity values (C) for the sites dominated either by Norway spruce or Scots pine in Tanaelv Belt–Lapland Granulite transition in Finnish Lapland

FIGURE 4. Artificial neural network classification for Norway spruce and Scots pine in Tanaelv Belt–Lapland Granulite transition in Finnish Lapland

TABLE 1 Site locations, lithology, tree dominance, elevation, temperature sum, mean soil dielectric values, soil gamma-ray values, and soil electrical conductivity of the study sites

Sihvo, J. 2002. Ylä-Lapin luonnonhoitoalueen ja Urho Kekkosen kansallispuiston luontokartoitus. Loppuraportti osa 2: Ylä-Lapin luontotyypit. Metsähallituksen luonnossuojelujulkaisuja, Sarja A, no. 137.

 Google Scholar

Juntunen, V. , S. Neuvonen , Y. Norokorpi , and T. Tasanen . 2002. Potential for timberline advance in northern Finland, as revealed by monitoring during 1983–99. Arctic 55:4 384–361.

 Web of Science ®Google Scholar

Marker, M. 1985. Early Proterozoic (c. 2000–1900 Ma) crustal structure of the northeastern Baltic Shield: Tectonic division and tectogenesis. Norges Geologiske Undersøkelse, Bulletin 403:55–74.

 Google Scholar