Which tree of the North American eastern forests has had its population decimated by a fungal disease?

Question

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The chestnut tree of the North American eastern forests has had its population decimated by a fungal disease known as chestnut blight. This disease was accidentally introduced from Asia in the early 1900s and has caused the population of chestnut trees to decline drastically, with estimates suggesting that over 4 billion trees have been lost.

Which Tree of the North American Eastern Forests Has Had