Ocean deoxygenation refers to the loss of oxygen from the oceans due to climate change ( Keeling et al. 2010 ) ....Increased nutrient inputs ( either through coastal runoff or through upwelling ) also lead to more.............Ocean deoxygenation can negatively impact ecosystem functions and services through changes in food web structure and biological diversity. In coastal waters west of Vancouvour Island wind patterns and divergence of the surface waters to the north and south create an upwelling regime that brings up subsurface waters from depths of 100 to 250 m. This potential to transport oxygen - depleted waters into coastal regions adversely effecting fisheries productivity. For further detalis consult https://www.ncbi.nlm.nih.gov