Modern agriculture is underpinned by a steady supply of fertilizer. However, one of the main ingredients of fertilizer, phosphorus, is running out, putting pressure and financial strain on farmers throughout the world. Now, with war in Europe causing additional supply disruptions, diminishing stocks of phosphorus may compromise the ability of the world to feed itself.
Mined from rocks and often liberally applied to fields, phosphorus is used in agriculture to help crops grow. However, much of this vital nutrient leaches from fields into nearby rivers, where it is transported to the ocean and eventually buried in deep ocean sediments. As the easily minable sources of phosphorus-rich rock run out, the world faces an impending shortage of this key fertilizer ingredient.
"Animals are like a natural circulatory system for phosphorus," said co-author Joe Roman, conservation biologist and researcher at the University of Vermont."They can move nutrients through their carcasses, urine and dung." Doughty, who co-authored the study, believes there might even be an opportunity for a phosphorus trading system, with the collective goal of keeping this important nutrient out of the bottom of the ocean.
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