News

Climate change: Peatlands turning into carbon sources

Climate change: Peatlands  turning into carbon sources
Science
But according to a new study, the continent s peatlands are in such a dry and fragile state, they could go into reverse, releasing rather than absorbing carbon.

Scientists say it is more important than ever that we restore and safeguard these boggy landscapes.

Researchers examined 31 peatlands across England, Ireland, Scandinavia and continental Europe to assess changes during the last 2,000 years.

The study , published in Nature Geoscience , found that most peatlands had become drier during the period 1800-2000 than they had been for the last 600 years.

Image caption Peat bog harbours a rich diversity of plants and animals

Dr Maarten Blaauw from Queen s University Belfast said peatlands "have been a great help to our planet" - they suck carbon out of the atmosphere and store it, which helps to mitigate climate change.

This study, however, shows that "the drying of our bogs appears to have changed this process and the peatlands could now actually be turning into carbon sources - instead of absorbing carbon actually starting to emit it - clearly this is not good news for our planet".

Dr Graeme Swindles from the University of Leeds, who led the study, said it is more important than ever that we safeguard peatlands with effective management and active restoration.

"The combined pressure of climate change and human impacts may push these vitally important carbon storing ecosystems into becoming a global source of carbon emissions."

Peatlands are a type of wetland found in almost every country on Earth, from blanket bogs in the UK to swamp forests in Southeast Asia.

The term "peatlands" refers to the peat soil and the wetland habitat around it.

Peat forms over the course of millions of years as waterlogged conditions slow the process of plant decomposition.

Natural peatlands across the world store more carbon dioxide (CO2) than all other vegetation types in the world combined.

Large amounts of carbon, extracted from the atmosphere through photosynthesis, represent a global carbon store.

Countries are encouraged to include peatland restoration in their commitments to global international agreements on climate change, as this can help reduce emissions.

Climate change, peat extraction, drainage, burning and conversion to farmland have all exacted a toll on peatlands.

About 15% of the world s peatlands - covering less than 0.4% of the global land surface - have been drained, releasing greenhouse gases into the air, according to the .
Read more on bbc.com
News Topics :
Similar Articles :
Science
Preserving the world s peatlands and the vast carbon stores they contain is vital to limiting climate change, researchers say. advertisement The study, led by the University of...
Science
Scientists at the Department of Energy s Oak Ridge National Laboratory have demonstrated a direct relationship between climate warming and carbon loss in a peatland ecosystem. Their study published in...
Science
Emissions from UK peatland could cancel out all carbon reduction achieved through new and existing forests, warns the countryside charity CPRE. It says many degraded peatlands are actually increasing carbon...
Science
Researchers from the University of Leeds, the University of Bristol and Memorial University in Canada, have simulated the local changes in climate that took place across the world during the...
Science
Leading garden retailers are still failing to stop the sale of peat in compost despite pressure from the government and campaigners. The Wildlife Trusts said only one of 20 retailers...