2572495
Beschreibung
Karteikarten von Charlotte Hewson, aktualisiert more than 1 year ago
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Erstellt von Charlotte Hewson
vor etwa 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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