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Non-native invasive species (NNIS) are plants and animals that are introduced and successfully establish reproducing populations in ecosystems in which they do not naturally occur. Nearly 300 non-native species have been identified as being invasive or potentially invasive in the Houston-Galveston region. NNIS are problematic because they can out-compete, prey upon, hybridize with, or introduce disease to native species. In addition, invasive species can impact ecosystem services such as the provision of food and water, recreation and tourism, flood mitigation, and aesthetic value.

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