Figure 6
From: Trophic ecology of glass sponge reefs in the Strait of Georgia, British Columbia

Water conditions overlying reef and non-reef regions at Fraser Ridge sponge reef in the Strait of Georgia. (a) Heatmap of sponge density on Fraser Ridge reef showing the survey track. A SeaBird CTD with a transmissometer, oxygen sensor, and fluorometer was mounted on the remotely operated vehicle ROPOS during the survey. Boxes (i) and (ii) indicate the transects across reef and no-reef respectively that were integrated into sections (from SW to NE)Â for water property data shown in (b and c). Section A was overlying sponges (i) while Section B was overlying open sediments (ii). Map was generated using ESRI ArcMap 10.363 (http://www.esri.com/).