Urban trees at risk from drought

U.S. drought could damage trees as well as agricultural crops

WEST LAFAYETTE, Ind. | July 20, 2012

This summer's U.S. drought could damage trees as well as agricultural crops, and some could die or be affected for years to come, researchers say.

Although trees have deeper moisture-reaching roots than agricultural crops, it doesn't make them immune to prolonged drought, Purdue University urban forestry specialist Lindsey Purcell said.

"Drought can have a major impact on tree health and survival by effectively slowing and reducing growth," he said in a Purdue release Thursday.

"If drought is severe enough or lasts for a prolonged period of time -- such as what we're experiencing now -- it also can cause death to all or portions of a tree."

A more common effect of drought is to reduce a tree's ability to withstand insects and diseases, he said.

A water-deprived tree will see a significantly lowering of its energy reserves needed to produce chemicals that ward off pathogens, he said.

Recommended Stories

Drought affects 60 percent of lower 48

Drought focus of agricultural research

Drought spans 61 percent of U.S. land mass

2012 United Press International, Inc. All Rights Reserved.

Read more: http://www.upi.com/Science_News/2012/07/19/Urban-trees-also-at-risk-in-drought/UPI-16111342728112/#ixzz21BnaRhEb

Related Topics:

Curbing pollution helps underwater

Old nuclear sites have toxic legacy

Uranium mining has a toxic legacy

More links on Environment

More links on Drought


DNN Sponsors include: