How do human activities transport invasive species into new habitats?

Human activities are the primary drivers behind the transport of invasive species into new habitats. These organisms are frequently moved across the globe as "exotic stowaways" through various human-led processes.12

Key methods of transport include:

• Global Commerce and Shipping: Maritime shipping is a major pathway for biological invasions. The release of ballast water—water carried by ships to maintain stability—is a common practice that inadvertently introduces nonnative plants and animals into novel ecosystems when the water is discharged.3
• International Trade: The movement of goods provides numerous opportunities for species to hitchhike. Insects, seeds, and other organisms can hide within shipping containers, wooden pallets, and other international packaging materials.2
• Pet and Ornamental Trade: The intentional movement of species for the pet trade and the horticultural industry often leads to the introduction of nonnative animals and plants into environments where they may become invasive.12

To mitigate these risks, ecologists emphasize the importance of stricter inspections at ports and the implementation of robust monitoring programs to prevent the establishment of these species.2