ניר בתי גידול של צומח ומערכות אקולוגיות ויערניות

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The Deir Hanna antique olive trees are well known for their impressive stem and crown diameter. A survey of their unique habitat was executed in 2015. The trees roots penetrate a porous soil layed upon marly chalk. Under the chalk an aquiclude made of marl horizon. Part of the underground water appear in a small spring down the slope. This specific geological structure increased trees vitality and survivorship through the centuries. Recent hydro-mechanical operations made to increase the flow in the spring, might reduce water availability and could risk the trees survival in the future.