Wednesday, August 31, 2005

Poronjäkälää Nuorttitunturissa - Cladonia lichen in Nuorttitunturi fell


Nuorttitunturin poronjäkälävyöhyke (ks. luontopäiväkirjan merkintä 3.7.2005) kuvautuu parhaiten Pulkkatunturin pohjoisrinteeltä. Tunturin vasen laita on (ulommaisen) poroaidan laidunnetulla länsipuolella. Poroaita laskeutuu laelta alaviistoon vasemmalle, ensin koivu- ja sitten mäntyvyöhykkeeseen. Poroaidan itäpuolinen, laiduntamaton alue näkyy kuvassa kellertävänä.

In the Nuorttitunturi fell the effect of reindeer grazing can be seen, as photographed from the northern slope of Pulkkatunturi fell. In the left part of the photo an unpenetrable reindeer fence descents as straight line from the top slightly to left, down first to birch belt and then to conifer belt. Ungrazed zone, right from the reindeer fence shows as yellow.

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Why is the "ungrazed" side (right) more yellow? If ungrazed, there would be more liches..so are habitats dominated by lichens usually yellow?
 
Reindeers have eaten lichens. There is no more lichen on the left. Lichen is quite yellow.
 
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