Impact of Livestock Exclusion on Sidi Toui National Park Vegetation Communities, Tunisia

Table 1

Physiognomic changes inside Sidi Toui national park between 1988 and 2007.

	1988	2007
Number of vegetation units	6	13
% of area of A. henoniana & G. decander unit	57.25	30.72
% of area of H. schmittianum unit	11.16	—
% of area of R. suaveolens & S. vermiculata unit	9.81	—
% of area of R. suaveolens & H. schmittianum unit	9.53	0.02
% of area of H. schmittianum & G. decander unit	7.26	0.01
% of area of S. pungens unit	4.98	0.38
Evolution of vegetation units between 1988 and 2007	A. henoniana & G. decander	−46
	R. suaveolens & H. schmittianum	−100
	H. schmittianum & G. decander	−100
	S. pungens	−92
Number of substitution units	A. henoniana & G. decander	8 units
	H. schmittianum	6 units
	R. suaveolens & S. vermiculata	5 units
	R. suaveolens & H. schmittianum	5 units
	H. schmittianum & G. decander	5 units
	S. pungens	3 units