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Discovery

Seeing the Forest Under the Trees

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Image of dead maple leaves on the forest floor.

Ecologists found a new effect of acid rain: Too many dead leaves on the forest floor.

Credit: NPS


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Image of a sugar maple forest in the northern United States.

A long-term experiment continues on sugar maple forests in the northern U.S.

Credit: Sierra Patterson and Alan Talhelm


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Image of a forest floor in a maple forest with red, yellow and blue tags on stakes.

Acid rain affects vast maple areas; it slows the process of leaf decomposition.

Credit: Sierra Patterson and Alan Talhelm


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Image of sugar maple leaf litter.

Heavy leaf litter: Not a good sign for sugar maples; new seedlings can't get through.

Credit: NPS


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Photo of a scientist sampling atmospheric nitrogen deposition from acid rain on the forest floor.

Scientists study atmospheric nitrogen deposition from acid rain and its effects on forests.

Credit: Sierra Patterson and Alan Talhelm


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Image of a sugar maple forest.

A lovely stand of sugar maples, but for how long? The next generation is threatened.

Credit: Sierra Patterson and Alan Talhelm


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