Lecture 43-Climate Change

Lecture 43-Climate Change - Lecture 43 Climate Change-The...

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Lecture 43- Climate Change -The more you move to the left in the graph means a negative change in food productivity. Corn is the worst crop for predicted negative productivity; this is a major problem. Maybe we could genetically modify corn to help this? Coping with Climate Change -Switching crops for less demanding produce seems like a good idea in theory, but there must be a market for this new crop for it to be a realistic change. Climate Change: e.g. Nullarbor Plain -Data from the isotopes in the cave tell us about the climate and temperature -Pollen blown in , gives us more information as well -Animals fossilised in cave, birds lay their nests in the cave, catch prey, their bones are deposited in the cave -U, Pb, O and C isotopes were used to obtain information about the climate: the climate is warmer and drier now than it was 400,000 years ago… C3 and C4 plants? The Fauna -8 of 23 species of kangaroo in the deposits were new, meaning that 21 species of kangaroo went extinct, did not survive the Pleistocene -All were adapted to dry conditions, so the increased aridity was not the cause of the extinction -Over 400,000 years the climate has changed, but overall the ecosystem is still the same; climate change is not necessarily from human life Thalacoleo -A marsupial lion, one of the extinct species; it is an example of a carnivore coming from
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This note was uploaded on 04/04/2009 for the course BIOLOGY 1222 taught by Professor Haffie during the Spring '09 term at UWO.

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Lecture 43-Climate Change - Lecture 43 Climate Change-The...

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