dead wood fungus mushroom

left woodpecker home forest shelter timber fir green sustainable role nest dead threaten fungal conservation snag save breed ecology important tree standing essential resource deadwood bird wood brown ecosystem forestry nature biodiversity trunk food sustainability mushroom dwelling live rot survive habitat manage old diversity reserve management background birch creation stub logging peaceful mycelium bark biology growing bole organism tranquil stem meditative organic natural decay growth rotten zen quiet creative decomposition environment bracket stump snap beech red dead-nettle spring fungus living