917a21c5_y_and_diverse_marine_ecosystem__WHAT_IS_ALREADY_HAPPENING
[0] Intertidal species MBA; SAMS [WHAT COULD HAPPEN] Projected changes in sea level and storms may have important indirect impacts, as more sea defences are required. These act as artificial rocky shores allowing intertidal species to unnaturally extend their range. Continued extension and retraction of ranges within the UK, with rising temperatures of southern and northern species respectively. Some new species will become established, whilst others will disappear from our shores. [WHAT IS ALREADY HAPPENING] 
Some warm-water invertebrates and algae show continued increases in abundance and have extended their ranges around northern Scotland and eastwards along the English Channel over the last 20 years. The warm-water seaweed Bifurcaria bifurcata has established a new range boundary at Portland Headland in the last five years, 150 km east of previous records. Cold-water species (e.g. the acorn barnacle and dabberlocks alga) have continued to decrease in abundance throughout the period 2001-2007.
Healthy and diverse marine ecosystem
WHAT IS ALREADY HAPPENING