Aged Polish forest plots teach new ecosystem lessons

COLLEGE STATION -- A little-known acreage of trees in Poland planted in the late- 1960s has become a new teaching ground on biodiversity for a team of U.S. researchers. Though planted orchard-style over about 10 acres, the 14 different species of trees have at their bases as many different environments.

And that has scientists wondering how. How could plots of trees planted side by side in the same soil and subjected to the same climate over three decades with almost no human intervention cultivate such vastly different plant species -- and even soil acidity -- beneath them?

"Understanding how a tree species influences the ecosystem, or biodiversity, could be helpful in the long-term for managing forests," Dr. Mark Tjoelker, Texas Agricultural Experiment Station forest scientist, said. "It could help foresters know what the best mix of tree species would be to manage biodiversity."

What makes this stand of trees unique is that they have lived segregated but side by side for more than 30 years near the village of Siemianice in western Poland.

"The stands of trees are old enough now to see that they have changed in time," said Tjoelker. "The birch plot has grass and forbs underneath; the spruce a dark, thicker floor. There are many species of mushrooms in the forest, but they are segregated by the type of tree under which they grow."

Simply calling it "a common garden study of 14 temperate tree species," U.S. researchers are collaborating with the Polish Academy of Sciences to see if leaf and root traits of the trees can be linked to the ecosystem structure and function. Tjoelker will study physiology of the trees in his part of the three-year study under the National Science Foundation. He's teamed with fellow researchers from the University of Minnesota, Penn State University and the University of California-Santa Barbara. The forest is managed by the August Cieszkowski Agricultural University of

Contact: Kathleen Phillips
Texas A&M University - Agricultural Communications

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