Human Impacts on Ecosystems (HSC SSCE Biology): Flashcards
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% of Madagascar's rainforests now gone
% of Madagascar's rainforests now gone
Over 80%
Neolithic revolution timing
Neolithic revolution timing
Approximately 10,000 years ago
Soil erosion
Soil erosion
Removal of topsoil to distant areas by wind and water
Salinisation
Salinisation
Process of increasing salt concentration in soils & waterways
Eutrophication cause
Eutrophication cause
Overgrowth of cyanobacteria due to increased phosphorus
Leading cause of extinction globally
Leading cause of extinction globally
Habitat loss
Three levels of biodiversity
Three levels of biodiversity
Genetic diversity, species diversity, ecosystem diversity
% of Earth's species found in Australia
% of Earth's species found in Australia
Between 7 and 10%
Greenhouse effect function
Greenhouse effect function
Traps solar radiation, keeping Earth warm enough for life
Enhanced greenhouse effect
Enhanced greenhouse effect
Increase in greenhouse gas concentration absorbing more heat