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New Hampshire leads contiguous United States in percent tree cover

Date:
August 6, 2012
Source:
USDA Forest Service - Northern Research Station
Summary:
Tree cover in the nation's Lower 48 states covers 659 million acres, more than one-third of the nation, according to a US Forest Service study of national tree cover and impervious surfaces. New Hampshire leads the nation in percent tree cover (89 percent), followed by Maine (83 percent) and Vermont (82 percent). Percent tree cover is highest in Connecticut (67 percent) and lowest in Nevada (10 percent).

Tree cover in the nation's Lower 48 states covers 659 million acres, more than one-third of the nation, according to a U.S. Forest Service study of national tree cover and impervious surfaces. New Hampshire leads the nation in percent tree cover (89 percent), followed by Maine (83 percent) and Vermont (82 percent). On the other end of the spectrum, North Dakota has the lowest percent tree cover (3 percent), followed by Nebraska (4 percent) and South Dakota (6 percent).

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Using aerial photograph interpretation of circa 2005 imagery, U.S. Forest Service researchers Dave Nowak and Eric Greenfield found that in urban and community areas, percent tree cover is highest in Connecticut (67 percent) and lowest in Nevada (10 percent). The study, "Tree and impervious cover in the United States," was recently published in the journal Landscape and Urban Planning.

"Urban forests are a vital part of the nation's landscape," said Michael T. Rains, director of the Forest Service's Northern Research Station. "Forest Service science is supporting stewardship of urban forests with tools that communities, organizations and home owners can use to better understand the environmental benefits of trees."

Impervious cover in the conterminous United States is estimated at 2 percent, or 46 million acres. That percent goes up in urban areas, where impervious cover accounts for 25 percent of land cover. New Jersey leads the nation in impervious cover (12 percent) and Wyoming has the least statewide impervious cover (0.5 percent).

Both people and nature play a role in urban forestry, according to Nowak. "This research demonstrates how natural environments in concert with how we develop and manage communities significantly impacts tree cover in urban areas," Nowak said. "Cover data of a city or region can provide a baseline for developing management plans, setting tree cover goals, and for monitoring change through time, all of which are essential to sustaining urban forests."

The mission of the U.S. Forest Service is to sustain the health, diversity, and productivity of the nation's forests and grasslands to meet the needs of present and future generations. The agency manages 193 million acres of public land, provides assistance to state and private landowners, and maintains the largest forestry research organization in the world. The mission of the Forest Service's Northern Research Station is to improve people's lives and help sustain the natural resources in the Northeast and Midwest through leading-edge science and effective information delivery.


Story Source:

The above story is based on materials provided by USDA Forest Service - Northern Research Station. Note: Materials may be edited for content and length.


Journal Reference:

  1. David J. Nowak, Eric J. Greenfield. Tree and impervious cover in the United States. Landscape and Urban Planning, 2012; 107 (1): 21 DOI: 10.1016/j.landurbplan.2012.04.005

Cite This Page:

USDA Forest Service - Northern Research Station. "New Hampshire leads contiguous United States in percent tree cover." ScienceDaily. ScienceDaily, 6 August 2012. <www.sciencedaily.com/releases/2012/08/120806130855.htm>.
USDA Forest Service - Northern Research Station. (2012, August 6). New Hampshire leads contiguous United States in percent tree cover. ScienceDaily. Retrieved April 18, 2015 from www.sciencedaily.com/releases/2012/08/120806130855.htm
USDA Forest Service - Northern Research Station. "New Hampshire leads contiguous United States in percent tree cover." ScienceDaily. www.sciencedaily.com/releases/2012/08/120806130855.htm (accessed April 18, 2015).

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