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11.06.2018 - 14:33 Henri Mennella Marseille ïle Maire, les Pharillons

Date of observation: 
09.06.2018
Name of location or dive site: 
Marseille ïle Maire, les Pharillons
Current: 
weak
Visibility: 
some suspended particles
Water Temperature: 
18℃
Vertical extent of the habitat: 
Min

2

(m)
Max

4

(m)
Observation Depth: 
21.00(m)
Maximum Dive Depth: 
29(m)
Horizontal extent of the habitat: 
5-10 m
Orientation: 
NW
Thermocline's Depth: 
10.00(m)
Water temperature at predefined depths: 
Temperature: 
19.00℃
Meters: 
20.00(m)
Habitat continuity: 
Discontinuous
Slope: 
vertical
Rugosity: 
Tiny
Other observations : 

présence importante d'asparagopsis et de dyctiotales, qui recouvrent tout le substrat vertical.

Il reste des îlots épargnés dans des ragues, contre-tombant, à l'abris de la lumière, il faudra contrôler si avec l'arrivée du mucilage les dégradations soient plus importantes.

Pressures and Threats: 
Non-indigenous species: Caulerpa cylindracea (Absent)
Non-indigenous species: Asparagopsis spp. (Extended)
Mucilaginous aggregations (Limited)
Organism necrosis and mortality events (Extended)
Sedimentation on coralligenous biota (Limited)
Diver recklessness (Absent)
Fishing gear (Absent)
Litter (Absent)
Anchoring (Absent)
Urban waste sources nearby (Absent)
Other (Extended)
Other Pressures & Threats: 
Nécroses constatées sur la totalité des gorgones, soit limitée soit totale.
Coralligenοus Organisms: 
Eunicella cavolini (Scarce)
Eunicella singularis (Absent)
Paramuricea clavata (Abundant)
Leptogorgia sarmentosa (Absent)
Savalia savaglia (Absent)
Shark eggs (Absent)
Anthias anthias (Absent)
Epinephelus marginatus (Absent)
Scorpaena spp. (Absent)
Centrostephanus longispinus (Absent)
Other sea urchins (Scarce)
Calcareous red algae (Abundant)
Peyssonnelia spp. (Scarce)
Agelas oroides (Scarce)
Axinella spp. (Scarce)
Myriapora truncata (Absent)
Other erect bryozoans (Scarce)
Scleractinians (Absent)
Cliona spp. (Absent)
Corallium rubrum (Absent)
Homarus gammarus (Absent)
Palinurus elephas (Absent)
Scyllarides latus (Absent)
https://cs.cigesmed.eu/sites/default/files/web_axinella_issaris_01.jpg,https://cs.cigesmed.eu/sites/default/files/web_axinella_issaris_05.jpg,https://cs.cigesmed.eu/sites/default/files/web_eunicella-cavolinii_issaris_01.jpg,https://cs.cigesmed.eu/sites/default/files/web_general_issaris_02.jpg,