420 results
420 results for: grassland
- Earth
Corals, turfgrass and sediments offer stories of climate past and future
Science News reports from San Francisco at the fall meeting of the American Geophysical Union
- Animals
Bird fads weaken sexual selection
There's a new look for a hot male among lark buntings every year.
- Life
Gene linked to commitment-phobia
A common gene variation in men is linked to marital crises and less bonding in a study of more than 500 long-term couples.
- Ecosystems
Prairie Revival
Prairie restoration is attracting interest, but because so little long-term monitoring and comparative studies have been done, researchers are still wondering whether it's really possible to re-create a prairie.
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New World Stopover: People may have entered the Americas in stages
People first reached the edge of the Americas about 40,000 years ago but had to stay put for at least 20,000 years before melting ice sheets allowed them to move south and settle the rest of the continent.
- Math
Communities of Communities of …
A new approach to network theory focusing on the subcommunities within networks may shed light on everything from food webs to terrorist cells. It may even act as an oracle, helping scientists identify connections within a network they haven’t yet seen.
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19873
This article ignored important research by David Tilman and Jason Hill of the University of Minnesota. They found that planting a crop of 18 different native prairie plants grown in highly degraded and infertile soil with little fertilizer or chemicals yielded substantially more bioenergy than a single species in fertile soil. In fact, their crops […]
- Humans
Letters from the November 3, 2007, issue of Science News
Waste not, want not “Cellulose Dreams” (SN: 8/25/07, p. 120) ignored important research by David Tilman and Jason Hill of the University of Minnesota. They found that planting a crop of 18 different native prairie plants grown in highly degraded and infertile soil with little fertilizer or chemicals yielded substantially more bioenergy than a single […]
- Ecosystems
Going Native: Diverse grassland plants edge out crops as biofuel
Biofuels made from mixtures of plants native to prairies can yield more net energy than do biofuels derived from corn and soybeans.
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19779
Do cows and other domestic-herd animals really emit more methane than bison and other wild-herd animals emitted before people came along? Do grass, alfalfa, and other pasture plants remove less carbon dioxide than do forests? There were open grasslands before pastures replaced some forests. I hope the people who are researching these things take such […]
- Earth
Freeze-thaw cycles: How not to mix soil
The repeated cycles of ground freezing and thawing that occur in many places don't do a surprising poor job of churning the soil.
- Animals
Not So Spineless
Looking for personalities in animals, even among spiders and insects, could add new twists to ideas about evolution and explain some odd animal behavior.
