Worrying biodiversity loss in Finnish coastal waters: report

Habitats and organisms in Finland’s coastal waters are threatened by biodiversity loss, with some key species in worrying decline, Finnish experts said in a report published yesterday.

With its brackish, shallow waters and coastline covering over 46,000 kilometres, Finland’s Baltic Sea waters are home to organisms adapted to conditions found nowhere else in the world.

A decline of important keystone species such as bladder wrack, eelgrass and the blue mussel were a cause for concern, the authors noted.

“The diversity of invertebrates that form the basis of food webs in the coastal waters of Finland is inherently relatively low, which makes the ecosystem particularly vulnerable,” said associate professor and co-author of the report Christoffer Bostrom.

“If one species disappears locally, there is no species replacing that function,” he added.

By studying changes in Finland’s coastal marine environment for the first time, the experts at the Finnish Nature Panel were able to detect 45 different forms of biodiversity loss.

The local disappearance of species and decreases in others were the most common type of loss noted.

Coastal ecosystems are also important as they enable carbon and nutrient sequestration and oxygen production, and they uphold productive fish stocks.

The loss in biodiversity was driven by several factors, primarily eutrophication and climate change.

Eutrophication – the excess input of nutrients into the sea from sources such as agricultural run-off, forestry and waste waters – formed the main threat to marine biodiversity, said the report.

“None of Finland’s coastal water areas are in good condition in terms of eutrophication,” said Henri Sumelius, project researcher and lead author of the report. (AFP)