Changes in wind patterns and water circulation, caused by climate change, are depleting sardine numbers in the south Caribbean, finds a study. (Not the little salty fishes in tin cans!
The sardine, Sardinella aurita, feeds on plankton but since 2005, plankton levels in the Caribbean have reduced significantly, which, coupled with overfishing, may have contributed to the collapse of these fisheries — which plummeted by as much as 87 per cent, the study says.
The research team said that the decreasing levels of plankton production are the result of a reduction in ocean upwelling, whereby nutrients crucial for plankton production are brought from the sea's floor to the surface. The drop in upwelling has, in turn, been driven by changes in wind patterns and wind strength, themselves driven by global climate change.