sdu faculty of forestry journal special edition 2009 - Orman Fakültesi

SDÜ ORMAN FAKÜLTESİ DERGİSİ
Table 2. Temporary evolution of damaged shrub SYGs. Undamaged, damaged and
percentage of damaged shrub SYGs, in each district, in each year, and in all the inventoried
green spaces.
Shrub
SYGs
Undamaged
2005 2006 2007 2008
Damaged
% of damaged
Undamaged
Damaged
Arganzuela 53 10 15.9 49 30 38.0 55 30 35.3 29 60 67.4
Barajas 38 13 25.5 21 42 66.7 33 34 50.7
Hortaleza 79 52 39.7 68 56 45.2 62 92 59.7
Retiro 17 3 15.0 17 14 45.2 18 10 35.7
Salamanca 24 2 7.7 16 10 38.5 9 20 69.0
Villa de
Vallecas
223
% of damaged
51 8 13.6 23 45 66.2 31 36 53.7
TOTAL 262 88 25.1 194 197 50.4 55 30 35.3 182 252 58.1
4.2 Few differences are encountered among the districts.
There are few differences in the average percentage of damaged tree or shrub
SYGs among the districts (Table 3). A ji-squared test shows that these figures are
not significantly different at greater than the 90% level. This result was expected
since there are not big differences in climate or in soil composition among the
districts.
Table 3. Mean percentage of damaged SYGs. Mean figures of undamaged, damaged
and percentage of damaged tree SYGs, in each district, and in all the green spaces.
SYGs
Undamaged
Tree mean
2005-2008
Damaged
Undamaged
Damaged
% of damaged
Undamaged
Shrub mean
2005-2008
Arganzuela 24 44 64.8 47 33 41.1
Barajas 19 42 68.5 31 30 49.2
Hortaleza 36 66 64.6 70 67 48.9
Retiro 13 15 52.4 17 9 34.2
Salamanca 4 10 73.8 16 11 39.5
Villa de Vallecas 15 43 73.7 35 30 45.9
All green spaces 111 219 66.3 216 178 45.3
% of damaged
Undamaged
Damaged
Damaged
% of damaged
% of damaged