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One third of the world’s carbon tamed by grass

Grasslands might not capture the imagination of the public like the Rocky Mountains, the lakes of Manitoba or the rugged terrain of the Canadian Shield but efforts are underway to acknowledge the native prairie’s role in preventing climate change.

“Climate change is happening and that’s because of carbon in the atmosphere,” said Cameron Carlyle, associate professor of rangeland ecology at the University of Alberta. “Globally, rangelands hold 30 percent of soil carbon.”

But outside of conservation easements, which seek to protect diminishing rangelands, a formula to award carbon credits to those who steward the land to maintain that naturally stored carbon and even enhance that ability of the soil to absorb it, remains elusive.

Chad Macpherson, general manager of the Saskatchewan Stock Growers (SSG), said there are efforts to address the issue, notably a Canadian Forage and Grassland Association program.

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Episode 115: Home on the Range

Video: Episode 115: Home on the Range

We look at how high crop prices, driven in part by rising global food demand, biofuel incentives, and risk perspective and management, are encouraging the conversion of marginal grasslands into cultivated cropland. As more hay and pastureland is turned over to crop production, wildlife habitat becomes increasingly fragmented, leaving isolated “islands” of grass that may be too small to sustain functioning grassland ecosystems. We explore research using Alberta as a case study to understand the impact that conversion of hay and pasturelands into cropland could have on ecosystem intactness and biodiversity.