natürliche Wälder

[Mulder]

in einem Kommentar wird noch der Unterschied zu Baumplantagen erklärt


Andrew, there is one seldom explained effect that you didn't mention. Besides trees, a well formed forest also contains a stratification of intermediate species, the layers of mid canopy, understory and ground covering plants. Stratification within a well formed forest system with all it's layers creates a temperature gradient with higher temperature within the high strata in the top of the trees down to the cooler temperature in the understory, and the coolest temperature in the lowest ground cover layer.

Since cool air is denser, that temperature gradient creates air flow downward through the different strata with air flow eventually reaching the ground. As air cools, it tends to condense water on leaf surfaces in the lower strata, further contributing to water capture beyond what happens in the upper canopy you describe. Even underground, the fungal web can absorb humidity directly from atmosphere, if the soil is permeable and aerated. This means that not only are condensed water droplets absorbed, but also invisible water vapor can directly get into the soil.

One reason why this is so important is that if you compare an unstratified monocultured forest to a fully stratified forest, the stratified forest will exhibit the above described phenomenon while the unstratified forest will exhibit the opposite. In unstratified pine or eucalypt plantations without understory plants, the net moisture flux will be negative because no downward airflow occurs.


Generell sind die Videos des Kanals sehenswert, um zu lernen, wie die Natur funktioniert. Einer der besten Kanäle überhaupt.


Andrew Millison