Ecology research paper wins national award

Humans are known to alter the planet. One efficient way is by adding new species to ecosystems. People accidentally (and oftentimes deliberately) transport species from place to place in airplanes, boats and cars. Humans are known, too, to even remove a species entirely from its ecosystem by overhunting or by destroying the species' habitat. What, if any, are the consequences of such actions? How do they impact ecosystems?

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