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OCR
152 IVII. Zoocoenological characteristics presocia and below; the dynamics - starting small - underpin a wave-like process ofthe species representation. Therefore, all zoocoenoseshave a stage (an aspect) that is richer than it was before, and will be later. In the life of poikilothermic animals, the cold season switches off any associative need. At the start of the cold season, the populations being in de facto association just “freeze” like a single film frame, keeping the status in which the paralysing impact found them. In this condition the zoocoenosis is indeed “stable”, in which there is no change for months, unless a supersocion appears. Any change is triggered only by the weather. It is also known that several animals prepare for the winter, physiologically and behaviourally. This preparation often entails the suspension of any associations and, seeking out a place best fitting its ecological plasticity, the animals “retire” to overwinter. All this means that zoocoenoses temporarily disappear, and then form anew.
