Estamos por toda a parte e afectamos profundamente os espaços que ocupamos. Mas será o Homo sapiens uma espécie invasora?
Se olharmos para a lista de características que define uma espécie invasora poderemos pensar que partilhamos alguns comportamentos, como o crescimento rápido ou a sua maior eficácia na disputa pelos recursos com as espécies nativas.
Este artigo de 2011 do Smithsonian Blog faz uma breve análise à espécie humana, com uma conclusão muito lógica.
1) An invasive species is widespread: Humans, which can be found on every continent, floating on every ocean and even circling the skies above certainly meet this aspect of invasiveness.
2) An invasive species has to be a non-native: Humans had colonized every continent but Antarctica by about 15,000 years ago. Sure, we’ve done some rearranging of populations since then and had an explosion in population size, but we’re a native species.
3) An invasive species is introduced to a new habitat: Humans move themselves; there is no outside entity facilitating their spread.
4) An invasive species had adverse effects on its new habitat and/or on human health: Humans meet this part of the definition in too many ways to count.
Verdict: We’re not an invasive species, though we’re certainly doing harm to the world around us. If you think about it, all of the harm done by invasive species is by definition our collective faults; some kind of human action led to that species being in a new place where it then causes some harm. And so I’m not at all astonished to find people arguing that we’re the worst invasive species of them all.
Are Humans an Invasive Species?, Smithsonian Blog, 31 de Janeiro 2011
Não somos uma espécie invasora. Pelo menos para já, e neste planeta.
Etiquetas:Homo Sapiens, invasoras