How human expansion reshaped the planet's biodiversity through invasive species
In short: Humanity’s global movement has left a biological wake, transporting non-native species to environments where they can thrive and dominate. This lecture explores why these 'alien' invaders are so difficult to eradicate once they take hold.
Professor Tim Blackburn examines the phenomenon of invasive species—non-native organisms that establish themselves outside their natural geographic limits. These biological hitchhikers have fundamentally altered global ecosystems, often becoming permanent fixtures in new habitats.
The core challenge highlighted is the difficulty of eradication; once a species becomes established in a new territory, it is remarkably hard to remove. The lecture provides context on how human dispersal serves as the primary vehicle for these ecological shifts.
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Sources
- Summary by Intellect · source: Unwelcome Guests: Alien Animal Invaders - Professor Tim Blackburn
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