LIFESCI 2H03 Lecture Notes - Lecture 10: Lupercalia, Bouth, Sahel
3 Feb 2015
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Document Summary
Interactions involving carbon and nitrogen likely to modulate terrestrial ecosystem responses to increased atmospheric carbon dioxide: responses to high amounts of carbon dioxide may generally be smaller than high soil nitrogen supply. In general - changes in precipitation and in evaporation-precipitation ratios modify ecosystem functions. Crops and temperature changes: global production potential is threatened at greater than 1 c local temperature change, see reduced net primary productivity (npp) at, can accommodate nor more than 3 c before the these temperatures. Npp begins to decline: crop-yield may respond over and above the temperature signal due to, precipitation changes (and associated changes in precipitation to evaporation ratios), changes in the concentration of carbon dioxide, e. g. Maize and wheat yield in high-latitudes and low- latitudes: In southeast china - with the increase in temperature, there is an impact on the npp of the rice plants which are grown there: this resolves in a decrease in percentage of rice plants which are grown.
