Jellyfish swarms linked to climate change

SIGHTINGS OF exotic snake pipefish, swarms of jellyfish and an “unprecedented” rise in sea surface temperatures indicate climate…

SIGHTINGS OF exotic snake pipefish, swarms of jellyfish and an “unprecedented” rise in sea surface temperatures indicate climate change is having a significant effect on Ireland’s marine ecosystems, according to a new report.

Swarms of jellyfish, increased wave heights off the southwest coast and a greater variety of warm-water species in Irish waters have also been recorded by the authors of the report published today by the Marine Institute.

The document, entitled Irish Ocean Climate and Ecosystem Status Report 2009, is due to be launched by Minister of State for Fisheries Seán Connick, as one of three reports funded as part of the Marine National Development Plan research programme.

The authors noted that increases of sea surface temperature – at a rate of 0.6 degrees a decade – have been recorded since 1994. This is “unprecedented” in the past 150 years, the Marine Institute says.

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This temperature rise has been linked to an increase in microscopic plants and animals, along with species of jellyfish. The institute says increased numbers of most warm-water fish species have been observed in Irish waters.

The report predicts that global mean sea level may rise by up to 0.88m by 2100.

Lorna Siggins

Lorna Siggins

Lorna Siggins is the former western and marine correspondent of The Irish Times