Troppa luce.

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La gran parte delle foreste finlandesi sono commerciali,  cioe’ destinate allo sfruttamento umano e per farle fruttare bisogna operare una seria manutenzione.  Per esempio,  ogni 20 anni circa gli alberi vanno sfoltiti:  se ne tagliano alcuni per far si’ che crescano bene i rimanenti,  proprio come si fa per le carote nell’orto.

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Venendo a mancare le chiome di tanti alberi pero’,  si crea nel bosco molta piu’ luce,  e questa  luce cambia inevitabilmente anche il sottobosco.  A seguito dell’operazione di sfoltimento infatti nel sottobosco cresce erba,  la quale soffochera’ le piantine di mirtilli,  che costituivano il sottobosco prima dello sfoltimento.  Come vedete chiaramente in questi scatti:  l’erba alta la fa da padrona.

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Con l’erba,  possono nascere spontanei persino alcuni tipi di fiorellini.

Nelle foto seguenti,  invece,  potete vedere com’era il sottobosco prima della troppa luce:  tantissime piantine di mirtilli,  alternate ad un vero e proprio tappeto di muschio,  che per vegetare non hanno bisogno di luce eccessiva.

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mirt in crescita (1)

 

Altri costituenti del sottobosco sono le felci,  che invece vegetano in condizioni di luce variabili.

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L’ultima immagine qui sotto vi mostra il bosco prima dello sfoltimento,  con gli alberi troppo folti e vicini gli uni agli altri,  in competizione per acqua e nutrienti.  Col tempo,  gli alberi che sono rimasti cresceranno e le loro chiome torneranno a fare l’ombra necessaria per debellare l’erba e far tornare i mirtilli.

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Per ulteriore approfondimento,  il mio post:  Il taglio del bosco.

 

Too much light.

Finnish forests and woodlands are mostly commercial,  that is utilized for human purposes.  In order to manage them correctly to get an outcome,  it is crucial to do a serious maintenance.  For instance every few years (about 20),  forests must be thinned out:  some trees must be cut to leave space to other ones,  as well as it is wise to do with carrots in the vegetable yard.

After the thinning,  forests gain a larger quantity of natural light,  which will determine changes in the forest floor too:  now much more grass will grow,  whereas blueberries will disappear,  as you can see in my shots.  Too much light equals too much grass.

With the grass,  even tiny wild flowers will spontaneously expand in the undergrowth.  In the following shots you see the ideal undergrowth of an old forest:  thickets of blueberries on a carpet of moss,  which do not need excessive exposure to light to grow.

Ferns live under trees in woodlands too,  but do not mind light conditions.

My last shot shows the image of a dense forest before thinning:  trees are too close to each other and compete for water and nutrients.  The thinning is a momentary condition:  with time trees will grow again and their shade will allow the return of the blueberries,  reducing the useless grass.

For further info,  my post:  Il taglio del bosco.

 

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28 thoughts on “Troppa luce.

  1. Hello,

    Lovely views of the forest, looks like a great place for a walk. The blueberries looks yummy. We have some wild raspberries growing now. I think there are good and bad reasons for thinning the forest. I love the trees and ferns, beautiful photos. Enjoy your day, wishing you a happy new week!

    Liked by 1 person

  2. Ah, as I have told before this is a very important topic for me too.
    (In fact there are some significant decisions concerning the maintenance to be made here…)
    I love trees, ferns and bilberries but by now I have started to dislike grasses. 🙂

    Your header photo and the blue background are just lovely. Do you know the name of this blue? 🙂 I wanted to call it “celestial” but it’s even prettier, perhaps it’s “bluetiful”.
    Have a lovely Sunday!

    Liked by 1 person

  3. Thank you, Sara. Olavinlinna is a stunning view! I do not have any idea of the tone of blue in my background…it is just one of the many possibilities allowed by my WP theme. But “bluetiful” is fantastic! Have a great new week! xx

    Like

  4. Beautiful forest photos & info. Probably this year there shall be mushrooms too, because all of the rain. Wishing a nice new week.

    Liked by 1 person

  5. We have quite a few pine trees that are grown for logging. And when you walk in them, it’s all pine needles under them, nothing else can grow. But I do love to get out in the forest and love seeing your photos! Enjoy your week !

    Liked by 1 person

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