Changing cattle fields to forests
Western Andes forest in varying stages of regeneration, mixed in with cattle pasture.: image:Paul WoodcockChanging cattle fields to forests is a cheap way of tackling climate change and saving species threatened with extinction, new research published in the journal has found.
Researchers carried out a survey of carbon stocks, biodiversity and economic values from one of the world鈥檚 most threatened ecosystems, the western Andes of Colombia.
The main use of land in communities is cattle farming, but the study found farmers could make the same or more money by allowing their land to naturally regenerate.
Under carbon markets designed to stop global warming, they could get paid to change the use of their land from growing cows to growing carbon 鈥� receiving around US$1.99 per tonne of carbon dioxide that the trees they grow remove from the atmosphere.
The Gold-ringed tanager lives in a very small area in the western Colombian Andes and is listed as Endangered on the IUCN Red List.: image: GilroyThe move would also help boost the populations of many critically endangered species.
There are limited financial resources available to tackle climate change and biodiversity loss, so there is an urgent need to simultaneously address both issues.
Lead researcher Dr James Gilroy from the University of East Anglia鈥檚 school of Environmental Sciences carried out the research while at the Norwegian University of Life Sciences.
He said: 鈥淭his research shows that there are great environmental and ecological benefits to changing land use from cattle farming to forest, and there may even be financial benefits too.
鈥淚f these areas were instead allowed to regenerate to forest, then significant amounts of carbon dioxide would be captured from the atmosphere. Biodiversity would also be restored, improving habitats for many species at risk of extinction 鈥� all at minimal cost.
鈥淚t鈥檚 a win-win situation."
Cattle pasture in the foreground and young, regenerating secondary forest in the background: image:EdwardsDr Paul Woodcock, a postdoctoral researcher in the at 麻豆传媒高清版, is a co-author on the paper, and commented: 鈥淕lobally, forests store huge amounts of carbon, so the idea of paying for forests to be regrown could be an important part of strategies to combat climate change鈥�.
But there is concern that land values in some regions are too high to make such carbon payments economically viable.
鈥淚n our study, carbon accumulated rapidly in regenerating forests. Combined with the very low profits from cattle farming in the region, this shows that payments for regrowing forest in the Tropical Andes would be affordable鈥�.
The study also found that letting forests regenerate had a massive impact on the populations of threatened species.
In secondary forests in the region, researchers found 33 of 40 red-listed bird species that are threatened with extinction. However, in cattle pastures there were only 11.
鈥淭his costs very little money,鈥� said senior scientist, Dr David Edwards, of the University of Sheffield鈥檚 Department of Animal and Plant Sciences.
鈥淧roviding people are willing to spend the money, this could be a critical mechanism for stopping climate change and protecting some of the world鈥檚 most endangered species.
鈥淭he economic benefits of cattle farming are minimal, so this is a way farmers could make the same, if not more money. The land would be rented off farmers for 30 years and they would be paid for the carbon grown.
鈥淲e studied older forests that are around 20-30 years old and found they had recovered around half of the carbon of a really mature forest. More carbon comes back every single year, and as it does so, large numbers of highly threatened species return.
鈥淭he impact on reducing the biodiversity extinction crisis and climate change could be huge.鈥�
'Cheap carbon and biodiversity co-benefits from forest regeneration in a hotspot of endemism' appears on the Nature Climate Change website on 29.4.14 (from 16.00 BST). The DOI is 10.1038/nclimate2200 and the full paper can be found at .
Publication date: 29 April 2014