. Cold-water Coral Reefs: out of sight - no longer out of mind. UNEP-WCMC Biodiversity Series 22. Cold-water coral reefs. The large anemone Botocera tuediae, commonly found in cold-water coral reef environments structures and sediment types within and adjacent to coral habitats. The methods used will be non-destructive. Oceanographic datasets focus on water mass properties (physical, chemical and to a lesser extent biological), current regimes and particle concentration. To date, limited information exists covering longer timespans to better understand the hydrodynamic changes in coral habitat
. Cold-water Coral Reefs: out of sight - no longer out of mind. UNEP-WCMC Biodiversity Series 22. Cold-water coral reefs. The large anemone Botocera tuediae, commonly found in cold-water coral reef environments structures and sediment types within and adjacent to coral habitats. The methods used will be non-destructive. Oceanographic datasets focus on water mass properties (physical, chemical and to a lesser extent biological), current regimes and particle concentration. To date, limited information exists covering longer timespans to better understand the hydrodynamic changes in coral habitats over annual cycles (White, 2003; White et at., in press). These information needs can be addressed using anchored moorings deployed at coral habitats, equipped with temperature, salinity and particle sensors, sediment traps and with current meter arrays. Benthic lander systems equipped with acoustic Doppler current profilers (ADCPs) and optical backscatter devices to estimate particle resuspension can be used to provide information on the bottom current flow and particle dynamics at the level of the corals (Roberts et al., in press). As shown by geological records, some of the coral habitats have persisted for thousands if not millions of years; underlying geological information Is needed to better understand the response of coral habitats to global change, such as the shift from glacial to interglacial climatic conditions (Van Rooij et al., 2003; Schroder- Ritzrau et In press). Geophysical seismic surveys reveal information on the underlying geology of cold- water coral habitats (Figure 27). Sediment coring or drilling in areas where living corals are no longer found is necessary to decipher the time constraints and preserved species compositions back through time. Many coral habitats occur and occurred in seas that were strongly affected by glacial cooling at high latitudes, which would have suppressed coral growth. The estimation of the time lag of postglacial coral r
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