Bananas could replace potatoes in warming world
London, Nov 4: Climate change could lead to crops from the banana family becoming a critical food source for millions of people, a new report says.
Researchers from the CGIAR agricultural partnership say the fruit might replace potatoes in some developing countries.
Cassava and the little-known cowpea plant could be much more important food crops as temperatures rise.
People will have to adapt to new and varied menus as traditional crops struggle, say the authors.
Responding to a request from the United Nations' committee on world food security, a group of experts in the field looked at the projected effects of climate change on 22 of the world's most important agricultural commodities.
They predict that the world's three biggest crops in terms of calories provided - maize, rice and wheat - will decrease in many developing countries.
They suggest that the potato, which grows best in cooler climates, could also suffer as temperatures increase and weather becomes more volatile.
The authors argue that these changes "could provide an opening for cultivating certain varieties of bananas" at higher altitudes, even in those places that currently grow potatoes.
Dr Philip Thornton is one of those behind the report. He told BBC News that while bananas and plantains also have limiting factors, they may be a good substitute for potatoes in certain locations.
"It's not necessarily a silver bullet, but there may be places where as temperatures increase, bananas might be one option that small-holders could start to look at."
The report describes wheat as the world's most important plant-derived protein and calorie source.
But according to this research, wheat will face a difficult future in the developing world, where higher prices for cotton, maize and soybeans have pushed wheat to marginal land, making it more vulnerable to stresses induced by climate change.
One substitute, especially in South Asia, could be cassava - which is known to be tolerant to a range of climate stresses.
But how easy will it be to get people to adjust to new crops and new diets?
Bruce Campbell is programme director of the Climate Change, Agriculture and Food Security research group (CCAFS) which co-ordinates work among leading institutions around the world. He told BBC News that the types of changes that will happen in the future have already happened in the past.
"Two decades ago there was almost no rice consumption in certain areas of Africa, now there is. People have changed because of the pricing: it's easier to get, it's easier to cook. I think those sort of shifts do occur and I think they will in future."
One of the big concerns among researchers is how to tackle the need for protein in the diet. Soybeans are one of the most common sources but are very susceptible to temperature changes.
The scientists say that the cowpea, which is known in sub-Saharan Africa as the "poor man's meat" is drought-tolerant and prefers warmer weather and could be a reasonable alternative to soya. The vines of the cowpea can also be used as a feed for livestock. Courtesy BBC
Lastupdate on : Sun, 4 Nov 2012 21:30:00 Makkah time
Lastupdate on : Sun, 4 Nov 2012 18:30:00 GMT
Lastupdate on : Mon, 5 Nov 2012 00:00:00 IST
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