Non-native Invasive Species Best Management Practices

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Non-native plants, animals, and microorganisms found outside of their natural range can become invasive. While many of these are harmless because they do not reproduce or spread in their new surroundings, other non-native species (NNIS) are considered invasive if they can cause harm to the economy, ecology or human health of the new environment. These species thrive in new areas because they establish relatively quickly, tolerate a wide range of conditions, are easily dispersed, and are no longer limited by the diseases, predators, and parasites that kept their populations in check in their native range.

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