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Archive for the 'carbon dioxide' Tag

Do birds help curb global warming?

April 8th, 2010, 9:55 am by

The early bird catches the worm — and, one UC Irvine scientist says, might also help reduce the effects of global warming.

Eastern bluebird with leaf-eating caterpillar. Photo by Mike Onyon.

In a new study published in a scientific journal this week, ecologist and lead author Kailen Mooney shows that birds, bats and lizards consume enough insects to reduce the damage they cause to plants and promote plant growth — by 14 percent on average.

“The goal was to understand how natural communities work, and the role of top predators in shaping and affecting communities of insects,” Mooney said.

The study itself, a “meta-analysis” of 63 previous studies involving 113 experiments, looked only at how plant growth is affected by removing birds and other animals that prey on insects. But the implications for climate change are clear, Mooney said.

“Anytime a plant is growing, it’s taking carbon dioxide out of the atmosphere and turning it into tissues,” he said.

Humanity’s release of carbon dioxide, along with other greenhouse gases, is believed by climate scientists to be Read the rest of this entry »

Climate question? A UCI scientist answers

January 11th, 2010, 12:12 pm by
prather2

Michael Prather

We’ve been inviting readers to send us their questions about climate change, and seeking answers from climate scientists at UC Irvine. Michael Prather, who specializes in climate modeling and for years has been an author of reports from the United Nations’ Intergovernmental Panel on Climate Change, answers a question about greenhouse gases from Jim Craig (blog name Jack Kreg).

Craig, 59, is an aeronautical engineer who lives in Lake Forest. His question focuses on man-made vs. natural carbon dioxide, or CO2.

Please send us your questions about climate change by commenting on this blog post or e-mailing reporter Pat Brennan directly at pbrennan@ocregister.com.

Question: We are led to believe that global warming is caused by man made CO2, yet CO2 and other greenhouse gases are also produced in nature. EPA is careful to skirt this issue by using the term “man-made greenhouse gas emissions.” They pass right over the fact that GH gases are naturally produced. It is said that GH gases are in fact produced and consumed in nature, like plant life converting CO2 into O2, e.g. CO2 consumption. Doesn’t the ocean absorb huge amounts of CO2?

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