GGR314H1 Lecture Notes - Lecture 6: Sulfur Hexafluoride, Tropical Rainforest, Upwelling
13 Sep 2016
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Document Summary
Vulnerability to impacts: natural system not vulnerable to an impact but if not projected it won"t actually be considered a really vulnerable system. Rather than specific habitats, system wide strain on ecosystems. Species adapted to habitat that they are in. Trees effects of co2: most trees are c3 plants which respond well to increased co2, overall, co2 fertilization effect is weaker for forest than field crops. Temperature effects: stimulation of photsynthesis if temp is below optimum, need for increased respiration for cooling, some trees need cold winter temps to germinate, some trees react badly to winter thaws o. Precipitation: pattern of dry areas getting drier, wet areas getting wetter, some regions will experienced reduced summer rainfall, water strees early in growing season could reduce growth. So far the impacts show that there has been slightly more growth, largely because of co2 fertilization and increased temperatures. Carbon sink ability will slow down over time: should also pay attention to spatial pattern.
