917a21c5_y_and_diverse_marine_ecosystem__WHAT_IS_ALREADY_HAPPENING
[0] Fish Cefas; FRS; MBA [WHAT COULD HAPPEN] Climate change will have far-reaching impacts on the dynamics of fish populations; however, current knowledge of underlying mechanisms is limited. Much less is understood about the possible future impacts of climate change on non-commercial fish species, compared to those targeted by fisheries. [WHAT IS ALREADY HAPPENING] 
Abundances of warm-water fish species (e.g. red mullet, John Dory, triggerfish) have increased in UK waters during recent decades, while many cold-water species have experienced declines. There has been a notable influx of snake pipefish to UK waters since 2004, and research is under way to explain this. Poor 'recruitment' of juvenile cod may be associated with a climate-related shift in the composition of zooplankton, but also by a reduction of the adult, parental population by fishing. In some parts of the southern North Sea, cold-water species, such as cod and eelpout, have been shown to experience metabolic stress during warm years, as evidenced by slower growth rates and difficulties in supplying oxygen to body tissues.
Healthy and diverse marine ecosystem
WHAT IS ALREADY HAPPENING