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 The expansive underground root systems of quaking aspen may survive for hundreds of years, sending up root sprouts when conditions are favorable. In this case the above-ground trees have been harvested by a family of beavers who were building a dam. Although only recently disturbed, the aspen has already begun sending up sprouts, and will soon dominate the site again. In some more extreme cases as many as 110,000 of these vegetative sprouts have been recorded on a single acre! Because all of these sprouts may arise from a single root system, they are in essence all part of the same tree. The result of this vegetative reproduction is entire groves of quaking aspen, with hundreds of individual stems or clones, that are comprised of only a single tree.

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