Food shocks increase as world warms
Overfishing is one of the most serious threats to marine food supplies. Image: By Fabien Bazanegueon Unsplash
Heat extremes harm harvests. So do floods, drought and high winds. Climate change spurs food shocks that threaten the supper table.
LONDON, 1 February, 2019 − More than ever, the world’s ways of keeping hunger at bay are taking a pounding as food shocks become more frequent. Potatoes are being baked in heat waves. Corn is being parched by drought. Fruit is being bitten by frost.
And a long-term study suggests that for the world’s farmers and graziers, fishing crews and fish farmers, things will get worse as the world warms. Australian and US scientists report in the journal Nature Sustainability that they examined the incidence of what they call “food shocks” across 134 nations over a period of 53 years.
They found that some regions and some kinds of farming have suffered worse than others; that food production is vulnerable to volatile climate and weather changes; and that the dangers are increasing with time.
The researchers looked at cases of dramatic crop failure, harvest loss and fishing fleet failures between 1961 and 2013, as recorded by the UN Food and Agriculture Organisation and other sources, and then mapped shock frequency and co-occurrence.
In their database of 741 available time-series of food production, they found 226 cases of food shock: dramatic interruption of supply.
Hunger increases
Agriculture and livestock emerged as slightly more vulnerable to shock than fisheries and aquaculture. South Asia suffered most from crop damage or loss; the Caribbean for livestock, and Eastern Europe for fisheries; some of these regions were hard hit in more than one sector.
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