CONTENTS
Introduction ....................................................................................................................... 2
1. Literature review ........................................................................................................... 5
1.1. Biological characteristics of Posidonia oceanica .................................................. 5
1.2. Distribution of Posidonia oceanica meadows ....................................................... 6
1.3. Economic and ecological roles of Posidonia oceanica meadows ......................... 7
1.4. Posidonia oceanica: biological status indicators ................................................... 8
1.5. Posidonia oceanica meadows in Algeria ............................................................... 8
1.6. Sensitivity of Posidonia oceanica meadows to anthropogenic pressures ........... 11
2.Materials And Methods ............................................................................................... 14
2.1. Study area ............................................................................................................ 14
2.1.1. Tipaza region .................................................................................................................. 14
2.1.2. Algiers region ................................................................................................................. 15
2.1.3. Boumerdes region ........................................................................................................... 16
2.2. Anthropogenic pressure assessment ..................................................................... 17
2.2.1. Anthropogenic pressure assessment using satellite imagery .......................................... 17
2.2.2. Anthropogenic pressures assessment supplemented by data census .............................. 21
2.3. Statistical analysis ................................................................................................ 25
3.Results and Discussion ................................................................................................ 29
3.1. Anthropogenic pressures assessment using satellite imagery .............................. 29
3.1.1. Lopez Y Royo et al. (2009): Land use only in the coastline (0.25km
2 ) ......................... 29
3.1.2. Lopez Y Royo et al. (2009) and, adjusted in this study: land use over the 10km .......... 29
3.2. Anthropogenic pressures assessment supplemented by data census ................... 37
3.2.1. Using the method described by Hu et al. (2021) and adjusted ....................................... 37
3.2.1. Using the method described by Larid (2002) and adjusted ............................................ 38
Introduction ....................................................................................................................... 2
1. Literature review ........................................................................................................... 5
1.1. Biological characteristics of Posidonia oceanica .................................................. 5
1.2. Distribution of Posidonia oceanica meadows ....................................................... 6
1.3. Economic and ecological roles of Posidonia oceanica meadows ......................... 7
1.4. Posidonia oceanica: biological status indicators ................................................... 8
1.5. Posidonia oceanica meadows in Algeria ............................................................... 8
1.6. Sensitivity of Posidonia oceanica meadows to anthropogenic pressures ........... 11
2.Materials And Methods ............................................................................................... 14
2.1. Study area ............................................................................................................ 14
2.1.1. Tipaza region .................................................................................................................. 14
2.1.2. Algiers region ................................................................................................................. 15
2.1.3. Boumerdes region ........................................................................................................... 16
2.2. Anthropogenic pressure assessment ..................................................................... 17
2.2.1. Anthropogenic pressure assessment using satellite imagery .......................................... 17
2.2.2. Anthropogenic pressures assessment supplemented by data census .............................. 21
2.3. Statistical analysis ................................................................................................ 25
3.Results and Discussion ................................................................................................ 29
3.1. Anthropogenic pressures assessment using satellite imagery .............................. 29
3.1.1. Lopez Y Royo et al. (2009): Land use only in the coastline (0.25km
2 ) ......................... 29
3.1.2. Lopez Y Royo et al. (2009) and, adjusted in this study: land use over the 10km .......... 29
3.2. Anthropogenic pressures assessment supplemented by data census ................... 37
3.2.1. Using the method described by Hu et al. (2021) and adjusted ....................................... 37
3.2.1. Using the method described by Larid (2002) and adjusted ............................................ 38