Impacts of Humans on ecosytems

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  • Impacts of humans on ecosystems
    • introduced alien species can escape into local ecosystems and become invasive
      • species native - endemic
      • species not native but introduced by man - alien species
        • invasive species - if spread quickly
    • Competitive exclusion and the absence of predators can lead to reduction in the numbers of endemic species when alien species become invasive
    • pollutants become concentrated in the tissues of organisms at higher trophic levels by biomagnification
      • biomagnification - chemical substances become more concentrated at each trophic level
    • Macroplastic and microplastic debris has accumulated in marine environments
      • gyres


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