New study showcases importance of nature in hitting net zero

Photo by Akil Mazumder:

New report showcases the impact that different UK habitats can have in taking carbon out of the atmosphere and helping reach net zero by 2050, whilst delivering for both biodiversity and conservation.

In ‘Carbon Storage and Sequestration by Habitat 2021’, Natural England researchers found that peatlands and native woodlands are habitats which have the greatest capacity to store carbon, but that many other habitats, such as saltmarsh and sea grass meadows have a ‘significant role’ to play a role in helping the UK hit net zero by 2050.

Tony Juniper, Chair of Natural England, said: “This research reveals the fundamental importance of conserving and enhancing our natural environment in meeting the climate change challenge.

“Taking carbon out of the atmosphere to be stored in ecosystems, including woods, peatlands and salt marshes, is a vital part of our journey to net zero, and if done in an integrated manner will help meet our ambitions for nature recovery and also climate change adaptation, such as reducing the risk of flooding.

“By combining different policies and strategies on land and at sea, then major climate related benefits can be achieved.

“Woodland creation incentives, peatland recovery, action on farms, re-naturalisation of the coast and landscape-scale nature recovery projects can all contribute.

“The climate change and nature emergencies are two sides of the same coin and with this kind of information the UK can lead in showing how we can go low carbon and high nature at the same time.”

The report also highlights the importance of protecting traditionally managed habitats such as hedgerows, hay meadows, heathlands and old orchards as a way of preserving carbon stocks and wildlife that may have taken centuries to develop.

There are also ‘good opportunities’ to create new patches of habitat and hedgerows within farmed landscapes for biodiversity and carbon storage.

Findings of the new study included:

  • Woodlands have high rates of carbon sequestration – depending on the species, age and location. New native woodlands can support biodiversity at the same time as taking up carbon. Old woodlands can become substantial carbon stores, with a hectare of native woodland sequestering the equivalent CO2 each year as flying London to Rome 13 times.
  • Saltmarshes can be highly effective carbon stores, as well as helping coasts adapt to future climate change. Restoration of sea grass meadows also has potential to capture carbon from the atmosphere in its vegetation, and also trap carbon from elsewhere in sediments. One hectare of saltmarsh each year buries the carbon equivalent of an average car’s annual carbon emissions.
  • Orchards and hedgerows are effective at storing significant amounts of carbon but generally cover a smaller area than other habitats and are cut regularly, limiting the amount of carbon gain. Their sensitive management, however, can increase carbon storage whilst providing benefits for wildlife and the cultural heritage in farmed landscapes.
  • Peatlands are the largest carbon stores. When in a healthy condition they soak up carbon slowly but can go on doing so indefinitely. Peatland soils can be over 10 metres deep, holding huge carbon stocks that have developed over many millennia. Carbon held in the deep peat soils of fens and raised bogs hold eight times as much carbon as the equivalent area of tropical rainforest.
  • Heathlands and grasslands store more carbon than modern agricultural landscapes but less than peatlands, saltmarsh and old woodlands. Protecting these old, established habitats is important for biodiversity, as well the carbon stocks they hold, as both may have taken centuries to accumulate.

The full report can be read on the Natural England website.