Climate change threat to Arabica coffee crops
Climate change could severely reduce the areas suitable for wild Arabica coffee before the end of the century.
That is the conclusion of work by a UK-Ethiopian team published in the academic journal Plos One.
It supports predictions that a changing climate could damage global production of coffee - the world's second most traded commodity after oil.
Wild Arabica is important for the sustainability of the coffee industry because of its genetic diversity.
Arabica coffee and Robusta coffee are the two main species used commercially, although the former provides about 70% of production.
The Arabica crops grown in the world's coffee plantations are from very limited genetic stock and are thought to lack the flexibility to cope with climate change and other threats such as pests and diseases.
The researchers from the Royal Botanic Gardens in Kew, UK, and the Environment and Coffee Forest Forum (ECFF) in Addis Ababa, Ethiopia, examined the future distribution of wild Arabica using climate modelling.
They looked at how wild Arabica might be affected under three different carbon emission scenarios and over three time intervals (2020, 2050 and 2080).
When the researchers looked at what would happen in the locations where Arabica was currently grown, the best-case outcome was a 65% reduction in suitable sites by 2080.
The worst-case outcome was a 99.7% reduction by 2080.
A different analytical approach yielded a 38% reduction as the most favourable outcome and a 90% reduction as the least favourable by 2080.
Aaron Davis, head of coffee research at the Royal Botanic Gardens, said: "The extinction of Arabica coffee is a startling and worrying prospect. However, the objective of the study was not to provide scaremonger predictions for the demise of Arabica in the wild.
"The scale of the predictions is certainly cause for concern, but should be seen more as a baseline, from which we can more fully assess what actions are required."
The researchers said the results should be regarded as "conservative", because the modelling does not factor in the large-scale deforestation that has occurred in the highland forests of Ethiopia and South Sudan (the natural home of Arabica coffee).
Moreover, because of the lack of suitable data, the models assumed intact natural vegetation, whereas the highland forests of Ethiopia and South Sudan are highly fragmented due to deforestation.
Other factors, such as pests and diseases, changes in flowering times, and shifting bird numbers (which disperse the coffee seeds), were also not included in the modelling.
Co-author Tadesse Woldemariam Gole, from the ECFF said: "As part of a future-proofing exercise for the long-term sustainability of Arabica production it is essential that the reserves established in Ethiopia to conserve Arabica genetic resources are appropriately funded and carefully managed."Resources: Climate change threat to Arabica coffee crops
- More news from this category
Ash dieback disease: Woodland Trust warning over impact01.08.2015, 03:40 BBC News.co.uk
Rise of facial recognition queried by US agency31.07.2015, 19:54 BBC News.co.uk
Obama's clean energy plan expected to boost renewables31.07.2015, 17:51 BBC News.co.uk
Does the government really want to ban WhatsApp, iMessage and Skype?31.07.2015, 17:35 BBC News.co.uk
The disgusting secrets of smelly feet31.07.2015, 16:29 BBC.com
- Similar news
Mayor Šimašius sees real threat of Hybrid Warfare should Moscow House open in Vilnius01.08.2015, 04:08 The Baltic Times
Ambassador to NATO: Latvia must change childish public opinions30.07.2015, 14:41 The Baltic Times
Latvian coalition partners allow for possible government change30.07.2015, 10:06 BNN-news.com
Climate Change: The Pope’s Encyclical and a Paddle for Life30.07.2015, 04:10 The Baltic Times
Coffee in crisis: The bitter end of our favourite drink?29.07.2015, 17:53 BBC.com