Asked by shawda
ow do invasive species spread? Identify three methods. (Site 1)
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How do invasive species spread? Three common methods:
1. Natural dispersal — wind, water currents, or animals carry seeds, spores, larvae, or adults to new areas (e.g., plant seeds blown long distances; aquatic larvae carried by rivers).
2. Human-mediated transport (unintentional) — stowaways on ships, airplanes, vehicles, packing material, or in ballast water and shipping containers (e.g., zebra mussels spread in ballast water; insects move on firewood).
3. Intentional introduction — people release or move species for agriculture, horticulture, fisheries, erosion control, or pet trade, and those species escape or become invasive (e.g., kudzu planted for erosion control; aquarium pets released into the wild).
1. Natural dispersal — wind, water currents, or animals carry seeds, spores, larvae, or adults to new areas (e.g., plant seeds blown long distances; aquatic larvae carried by rivers).
2. Human-mediated transport (unintentional) — stowaways on ships, airplanes, vehicles, packing material, or in ballast water and shipping containers (e.g., zebra mussels spread in ballast water; insects move on firewood).
3. Intentional introduction — people release or move species for agriculture, horticulture, fisheries, erosion control, or pet trade, and those species escape or become invasive (e.g., kudzu planted for erosion control; aquarium pets released into the wild).
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