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Erstellt von Charlotte Hewson
vor mehr als 9 Jahre
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Frage | Antworten |
what has mankind's impact on the world led to? | reduction in biodiversity |
what are the two main activities that have caused this reduction in biodiversity? | agriculture and deforestation |
what does an ecosystem become as they develop overtime? | a community |
what do these communities have? | high species diversity |
how does agriculture reduce biodiversity? | the land can only support a certain amount of biomass. farmers want this to be high. this is mostly taken up by one species so other species have to compete |
what is species diversity index like in agricultural ecosystems? | low |
what is species diversity like in natural forests? | high |
what is deforestation? | the permanent clearing of forests and conversion of land to other uses. |
what is one other human cause of deforestation? | acid rain from man made pollutants |
what is the most serious consequence of deforestation? | loss of biodiversity |
how many species are estimated to be lost each year due to deforestation? | 50,000 |
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