Jul 26, 2015 11:17 AM
UNH researchers track spread of tree invader
The Associated Press
DURHAM — University of New Hampshire scientists have tracked the spread of an exotic tree native to Asia that has invaded white pine and other forests in the state.
Their research points to a single tree planted on campus in the early 1970s.
The New Hampshire Agricultural Experiment Station researchers analyzed the 25-year spread of the castor-aralia in the Durham area. They found it is capable of spreading via seed from planted trees to urban and natural forests in southeastern New Hampshire.
The large, deciduous tree can grow to be 100 feet tall. It's capable of invading forests of sugar maple, beech and red oak, in addition to pine.
Most invasions are not detected until they're well-established. The researchers say much can be learned from studying the early stages of tree invasions.