RESULTS AND DISCUSSION
3.3. The relationship between anthropogenic pressure assessment and ecological status of
Posidonia oceanica meadows
The aim of this step is to analyze the relationship between the previously calculated
indices of anthropogenic pressures and the ecological status of Posidonia oceanica meadows
represented by the EQR PREI values obtained by Sengouga et al. (2019).
First, the comparison between the adjusted variants for each approach (Lopez and Hu)
shows the same trend (Figure 12).
The higher correlation is obtained between the EQR PREI values for each station and the
global anthropization index calculated according to Lopez Y Royo et al. (2009) when the land
use was considered in the 500m X 500m squares (R Pearson = - 0.76; p-value = 0.03).
For the adjusted method of Lopez Y Royo et al. (2009) (land use considered in a10Km x
10Km square), the approach has no significant correlation with the EQR PREI (R Pearson = -
0.42; p-value = 0.3).
Figure 12. Relationship between EQR PREI and the anthropization index calculated
according to Lopez Y Royo et al. (2009).
0
0,2
0,4
0,6
0,8
1
1,2
0,00
0,50
1,00
1,50
2,00
Ecological
statut
The global anthropization index
Lopez et al (2009)
Lopez et al (2009) adjusted