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Practice Listening: Fill in the Blanks (Type In)
ID: #37367
Medium
Global warming
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Global warming might seem like a botanical boon. After all, milder temperatures and more carbon dioxide and nitrogen should feed flora. But a ten year study has found that any positive effect on plant growth from climate change may soon disappear. The is in the journal Nature Climate Change. Researchers transplanted vegetation from four grassland ecosystems to lower, warmer elevations. They also the precipitation at the transplant sites based on altered rainfall estimates. For the first year, the plants did great, producing more biomass and churning out more oxygen for us. But their productivity went down for the rest of the . What happened? Warming did speed up the nitrogen cycle, which should have increased nitrogen's availability as plant fertilizer.
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