Diversità e struttura dell’avifauna in una successione post incendio di bosco meso-mediterraneo

[automatically translated] In this work we were analyzed the species richness, the turn-over and the structure of the birds in a secondary succession Fire community (Erico-Quercion ilicis) in the Regional Park Madonie (Sicily). In the springs of 2002 and 2003 censuses were carried out by listening points in 6 sample areas of 100 ha burned between 1993 and 2001, and four control areas are located in forests not by fire, respectively 25 and 50 years. In the post-fire series we have been counted a total of 33 species of birds. The species richness increased sharply in the first 10 years, and reached a plateau 25-30 years after the fire, while the turn-over of species decreased with the progress of time sequence. In the early stages of the sequence, the turnover depended substantially on the recolonization by species typical of bush regeneration. The communities of birds found in different stages of succession were not random aggregates, but each was nested in the next: all stages of succession that housed a smooth and orderly subset of species which had its most complete expression in the most advanced stage of vegetation. In conclusion, this study shows that most species nesting in the meso-Mediterranean woodland possesses a high degree of resilience and resistance to fire and which are necessary at least 25 years to restore the typical habitat conditions not disturbed. The communities of birds found in different stages of succession were not random aggregates, but each was nested in the next: all stages of succession that housed a smooth and orderly subset of species which had its most complete expression in the most advanced stage of vegetation. In conclusion, this study shows that most species nesting in the meso-Mediterranean woodland possesses a high degree of resilience and resistance to fire and which are necessary at least 25 years to restore the typical habitat conditions not disturbed. The communities of birds found in different stages of succession were not random aggregates, but each was nested in the next: all stages of succession that housed a smooth and orderly subset of species which had its most complete expression in the most advanced stage of vegetation. In conclusion, this study shows that most species nesting in the meso-Mediterranean woodland possesses a high degree of resilience and resistance to fire and which are necessary at least 25 years to restore the typical habitat conditions not disturbed. all stages of succession that housed a smooth and orderly subset of species which had its most complete expression in the most advanced stage of vegetation. In conclusion, this study shows that most species nesting in the meso-Mediterranean woodland possesses a high degree of resilience and resistance to fire and which are necessary at least 25 years to restore the typical habitat conditions not disturbed. all stages of succession that housed a smooth and orderly subset of species which had its most complete expression in the most advanced stage of vegetation. In conclusion, this study shows that most species nesting in the meso-Mediterranean woodland possesses a high degree of resilience and resistance to fire and which are necessary at least 25 years to restore the typical habitat conditions not disturbed.