agriculture, biology, ecology, science, technology, heat stress for cattle may cost billions by century's end
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Looming climate change may be economically hard for low-income cattle farmers in poor countries due to increasing heat stress on the animals. Globally, by the end of this century those producers may face financial loss between $15 and $40 billion annually.

Farmers in tropical regions—including large parts of South America, Asia and Africa—are likely to suffer significantly, particularly when compared with producers in the world’s wealthier temperate zones, according to a study by an international team of scientists and economists published March 9 in The Lancet Planetary Health.

“Economic losses will mostly occur in low- and middle-income countries,” said Mario Herrero, professor of sustainable food systems and global change in the Department of Global Development, in the College of Agriculture and Life Sciences. “Relative to the total value of dairy and meat production, it’s a significant and a higher proportion than in high-income countries.”

Herrero, along with lead author Philip Thornton, of the International Livestock Research Institute and CGIAR; Gerald Nelson, of the University of Illinois, Urbana-Champaign; and Dianne Mayberry, of Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia, have published “Impacts of Heat Stress on Global Cattle Production During the 21st Century.”

Escalating demand for livestock products in low- and middle-income countries, along with steadily increasing global average temperatures, is an uncomfortable mix, the researchers said. If livestock are to adapt to new thermal environments and increase their productivity, infrastructural investments or adjustments—such as switching to more heat-tolerant cattle breeds, and improving shade, ventilation and cooling systems—will be required.

In the paper’s high greenhouse-gas emission scenario, cattle production losses from heat stress are estimated to be $39.94 billion annually, or 9.8% of the value of production of meat and milk from cattle in 2005—the scientists’ baseline year. The low-emission scenario projects production losses at $14.9 billion annually, or 3.7% of the 2005 value.

By the end of the century, dairy and beef production in the United States is projected to decline by 6.8%, while India—a major dairy production country—is projected to lose more than 45% of its dairy farming due to heat stress increases.

“Resource-poor farmers in low-income countries depend heavily on their livestock for their livelihoods,” Thornton said. “The adaptation needs are even higher in these countries, and those farmers are the ones where the hit is even more severe.”

With climate change, farming and sustainability, Herrero suggested there is a need to create equitable adaptation practices “by design and to think intentionally on reaching the vulnerable sectors of global society,” he said. “We cannot just hope that the poor will not be affected.”

Technological development is key to bringing equity and social justice to poor farmers throughout the world. “Sustainability is not only about the environment and protecting biodiversity, but the human component is fundamental to sustainability,” Herrero said. “We need to deal with climate change, leaving no one behind. That’s the only truth.” More information: Philip Thornton et al, Impacts of heat stress on global cattle production during the 21st century: a modelling study, The Lancet Planetary Health (2022). DOI: 10.1016/S2542-5196(22)00002-X Provided by Cornell University Citation: Heat stress for cattle may cost billions by century’s end (2022, March 10) retrieved 10 March 2022 from https://phys.org/news/2022-03-stress-cattle-billions-century.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

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