SPATIAL PATTERN OF THE EUTROPHICATION EXPRESSION: A CASE OF LAKE OUBEIRA (EL-KALA NATIONAL PARK, NORTH-EAST ALGERIA)Samar Mohamed Faouzi, Larouci Nedjma, Khireddine Amine and Bensouillah MouradAbstract Oubeira lake is a freshwater body that is disturbed by both natural and anthropogenic factors leading to significant trophic fluxes. Spatial analysis is a promising approach in the field of ecosystem monitoring and management. At the landscape level, these disturbances are reflected by the spatial organization that characterizes the extent of the eutrophication phenomenon. The analysis of the patches that structure the spatial expression of the eutrophication phenomenon has enabled us to evaluate the degree of propagation of alterations and the intensity of the mechanisms that generate the ecosystem service of purification and depollution. The use of spatially specific methods for analysis and sampling of data has increased the level of expression of results. The analysis of the main spatial components (Mulispati-ACP) has proven to be very effective in providing a spatial typology based on the spatial dependency expressed by Moranâs statistics. The results obtained from this process, combining a multivariate spatial analysis method and geostatistical. The generated model was useful to identify a gradient organization. The spatial pattern arrangement revealed the functional aspect related to the intensity of eco-biological and hydrological process. |