Food Switch Could Offset Climate Threat to Staples
Food Switch Could Offset Climate Threat to Staples - Study - AlertNet
Climate change could significantly depress yields of maize, wheat and rice, constrain supplies of animal protein, and force a rethink of diets and the crops farmers grow, researchers said on Wednesday.
Yields of the world’s three biggest crops in terms of calories provided will decrease in many poorer countries as temperatures rise and rainfall becomes more unpredictable, according to a policy brief from the CGIAR Research Programme on Climate Change, Agriculture and Food Security (CCAFS).
By 2050, climate change could cause yield declines of 13 percent for irrigated wheat crops and 15 percent for irrigated rice in developing countries, the study warns. In Africa, farmers of maize - which is not well-suited to higher temperatures - could lose 10 to 20 percent of their yields, it adds.
Feeding livestock with maize and grain will also become more expensive, and fish availability will be increasingly limited, warns the analysis, which studied the potential effects of climate change on 22 of the world’s most important commodities, as well as water, forestry and agroforestry.
“The problems that climate change produces in the fields will be tackled in industrialised countries. It is the smallholder farmers in Africa and South Asia and the urban poor who spend too much of their wages on food - these are the people who will have less to eat in the near future unless we adapt at a much faster pace,” Robert Zougmoré, CCAFS programme leader for West Africa, said in a statement.
Hardier crops, including cassava, yam, barley, cowpea, millet and lentils, could fill the expected food gaps for poor communities, says the research.
Millet and lentils, for example, are highly nutritious and can withstand harsher growing conditions. Yet they are “not a bullet-proof adaptation option since certain climate stresses can reduce their yields as well”, the brief notes.
“Ecosystem changes due to climate change may spawn shifts in the intensity of pests and diseases, including potato blight and beetles, that will further limit food production. Indeed, even if crops could withstand increased temperatures and decreased rainfall, their yields could drop because of these scourges,” said CCAFS scientist Philip Thornton, who authored the study.