And so you cackling hyenas cannot comprehend anything above the grade school level. Surprise, surprise.
SERC - Lab CO2: C3 and C4 Plants
It turns out that the important difference between C3 and C4 species for rising CO2 levels is that C3 species continue to increase photosynthesis with rising CO2 , while C4 species do not. So, C3 plants that can respond readily to higher CO2 levels, and C4 plants can make only limited responses.
Thus increased CO2 likely will mean that some plant species will be stronger, more prolific, and may overwhelm those less able to benefit. The nature of plant populations in various areas probably will change; more sedges in place of grasses in marshlands, for example, consequences we don't yet know.
At our research sites, we are looking at how these different classes of plants respond to increased CO2 levels, and the broader implications for the ecosystems in which they live.