Despite being generally arid because of its karstic substratum, Mount Baldo displays some interesting wetland biotopes that can be related to the category of the so-called “small waters” (small bodies of water).  They can be natural or artificially created by man.  These habitats have common characteristics: shallow depth, standing water, extreme variations in temperature, lack of thermal stratification, and turbidity. “Small waters” can dry up, because they evaporate or because the bottom is not waterproof enough.  Such basins are called “astatic”.  Fairly large biotopes with variations in water level that never dry up are called “perennial basins”.

“Small waters” can be divided into three categories:


Ponds. Basins where water gathers that look like small lakes, characterized by having a depth of at least one meter (up to a maximum of 3-5 meters)


Puddles. The maximum depth of puddles is 50 cm and their size is very small.  They are often temporary since they fill up between fall and spring and become dry during the summer.


Swamps. Bodies of water with a variable depth that never exceeds a meter, but more often with a depth of barely half a meter.  They may dry up in certain periods of the year.  If the depression has vegetation emerging from the whole body of water then it’s called a marsh.