GEOG 3110 Lecture Notes - Lecture 26: Vapor Pressure, Fossil Fuel, Rubisco

• School: University of Guelph
• Department: Geography
• Course: GEOG 3110
• Professor: N A

Document Summary

Limitations of this approach does not consider land use cannot incorporate dispersal limitations assumes genetic homogeneity does not account for effects of co2. Enhanced greenhouse effect atmospheric co2 enrichment effects on plants and soils. Co2 fertilization occurs: rubisco will react with either o2 or co2. Growth chambers (e. g. ecotron) lack external validity, don"t tell use too much for what"s happening in the world. Results: elevated co2, concentration causes a greater increase in carbon cycling than in carbon storage in grasslands. Free-air co2 enrichment (face) like open top growth chambers but without any walls. Results: the data suggests no lasting growth stimulations by co2 enrichment in these mature trees after 4 years. Fossil record based on very long-term experiments. All others based on: short term experiments step-shift in co2. Plants respond different to gradual changing co2 and sudden change in co2. Tree-ring evidence for limited co2 fertilization of forests.