American Trees Are Moving West, and No One Knows Why

About three-quarters of tree species common to eastern American forests—including white oaks, sugar maples, and American hollies—have shifted their population center west since 1980. More than half of the species studied also moved northward during the same period. American Trees Are Moving West, and No One Knows Why


See the featured image:  It’s of trees in Dauphin County, PA on November 20, 2016.  The fall weather was so warm, we had almost no “Fall Foliage”.  Very few colorful changes in the trees, the leaves just eventually die and fall off.  It’s become more and more frequent over the years.  And this past winter 2016 – 2017 was yet again the “warmest on record”.

“Penn’s Woods” — Overall, the state says Pennsylvania’s trees are in “good shape”.  But for those of us living here, when we look at what’s happening year after year, we’re not that convinced.  Due to the longer, hotter summers and warmer winters many species are already “stressed”.  Sugar maple and birch will likely die off in the coming decades if not sooner.  In addition, higher temperatures have allowed pests to advance killing off ash, beech and hemlocks.  Hemlocks – the Pennsylvania State Tree – are being wiped out by the woolly adelgid.  Our woods are becoming less dense and native species are showing more and more stress.

Below is a nearby Ash Tree that’s trying to be saved by a local conservation group.  Entire stands of Ash have been destroyed.

Endangered Ash Tree Dauphin County, PennsylvaniaAsh Tree Preservation Dauphin County, Pennsylvania

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