Invasive Species : A Growing Concern
نویسنده
چکیده
A large — but unknown — number of alien species have become established in ecosystems across the United States, where some are causing serious damage. Forests of the Northeast have been particularly impacted by exotic species ranging from insects to starlings, and from herbaceous plants to pathogens. Government trade policies exacerbate the threat of new introductions. Funding shortfalls hamper an effective response to established pests. Scientists, forest managers, and other concerned people can help rectify these problems.
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