More whales, dolphins and porpoises are at risk from the effects of climate change than previously thought, according to a new study.

A scientist from Aberdeen University has found that climate change is likely to affect the environment where 88% of the world's whale, dolphin and porpoise species are found. 

Some species, such as the common dolphin and the striped dolphin, will benefit from the increased temperature of the seas as there will be more areas suitable for them.

However, for almost half of whale, dolphin and porpoise species, areas of suitable habitat are likely to shrink.

Research has found that for 21% of the 78 marine species the decline in habitat could be so dramatic it will greatly increase the risk of extinction.

The study was conducted by Dr Colin MacLeod a research fellow at Aberdeen University.

He said in a statement: "In the past, the main concern was for the small number of polar species likely to be affected by a decline in sea ice.

"However, this new study shows that there are many more species to be worried about.

"Some species found in temperate waters may be at risk not just because of the water temperatures they live in, but also because they only live in shallow waters.

"These species cannot simply respond to increases in sea temperature by moving into cooler neighbouring areas if the waters there are too deep."

He added: "Without this understanding, we cannot plan for the future and we may be left simply watching species disappear from areas where they were once common as the full impacts of climate change start to bite."