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    • fall celebration

    Scott Associates Fall Celebration: Are "Alien" Plants "Bad"? by Doug Tallamy

    Scott Arboretum of Swarthmore College

    500 College Avenue Swarthmore PA 19081
    • Sunday October 22nd 2017, 4:00pm to 6:00pm

    Lang Music Building

    The expense of fighting alien plant invasions and the unpopularity of restricting the sale of ornamental invasives have motivated several public figures to question the wisdom of continuing to battle invasive plants. After all, they argue, if an alien plant helps a particular butterfly, bird, or bee, why not embrace it?

    Using data from several studies, Doug Tallamy, professor of Entomology at the University of Delaware, answers this and related questions, showing that we can determine the overall impact of alien plants on our ecosystems only by comparing what is gained from their use with what is lost when they replace native plant communities. Introduced plants are not the ecological equivalents of the native plants they displace because they do not support the diverse and stable food webs that run our ecosystems.

    RSVP here.

    This event is free and the public is welcome.

    Scott Arboretum

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