4th International Submarine Canyon Symposium (INCISE2018)

5-7 November 2018, Shenzhen, CHINA

View Abstract

This is the detail of Multiscale Mapping and Monitoring to Understand Habitat Drivers and Variability within the Porcupine Bank Canyon, NE Atlantic

< Back to List Version: 1031:1044 Status: Approved Edit Time: 2018/9/21 0:09:58


Author
Aaron Lim
Co-Author(s)
Luis Conti, John Appah, Kim Harris, Luke O’Reilly, Andy Wheeler
Abstarct Title
Multiscale Mapping and Monitoring to Understand Habitat Drivers and Variability within the Porcupine Bank Canyon, NE Atlantic
Abstarct Body
Submarine canyons are vast, steep-sided geomorphological features that cut through continental slopes globally. Channelling flow from the shelf to the deep sea, organic matter and sediment flux at these sites are common. As such, submarine canyons can host and sustain a range of benthic habitats. The Porcupine Bank Canyon, NE Atlantic, is a tectonically-initiated canyon, cut-off from direct terrigenous input. Ranging from -600 m to -3000 m water depth, the canyon hosts a range of cold water coral habitat types (reefs and mounds, coral gardens, isolated colonies and coral carbonate talus slopes). This study utilises multiscale mapping and monitoring to characterise these habitat types and determine drivers of variability and development. Spatial analyses of regional- (hull-mounted multibeam echosounders), local- (ROV-mounted multibeam echosounders) and fine-scale (3D photogrammetry and video) data show that these habitats types are distinctly different. In 2019, 8 benthic landers equipped with sediment traps and current meters will be deployed for a period of 3 months within each of these habitat types to understand the processes driving variability between habitat type. Further, analysis of sediment traps will allow to determine the influence of anthropogenic activity (microplastics, faecal pellets, sediment plumes) on deep water habitats. This poster presents the work completed to date on this project.
INCISE Theme
Session 3: Patterns and heterogeneity in submarine canyons
Presentation Type
Poster Presentation
Keywords
Habitat mapping, sediments, cold water corals, canyons, monitoring

< Back to List