What type of flora requires high levels of CO2?

Question

Why do you think this is?

Answer 1

Some of the plants that will use CO2 in large quantities are our sugar canes... as long as they have their feet in water, they appear to be prepared to gobble it up fast.

In experiments in greenhouses, we have observed that as long as plants have adequate phosphates and water, they will absorb CO2. However, there appears to be a low-CO2 level below which they remove very little CO2. This points to a need to get the CO2 close to the plants, because they refuse to go out and get it.

The level of CO2 that plants urgently require does not appear to be very variable. If it were, some plants would starve while others take the concentration below the requisite threshold.

Some plants appear to require higher potassium levels to store the sugars as starches, and when they do not perform that conversion they cut back on sugar formation, so cut down on CO2 absorbed.

All plants appear to have a range of temperatures within which they capture most CO2, but there appear to be significant variations even within one species. Temperatures below or above that range may cut photosynthesis sharply.

Answer 2

Fern trees.

Answer 3

no flora requires high levels of CO2. otherwise they would die out.  plants that can benefit are those that do not already carry out C4 photosynthesis

do you realize that if temperatures increase by 1degree C photosynthesis can drop off by as much as 50%. you are also forgetting about the effect of increased levels of ozone that would have a detrimental effect on plant life.

Answer 4

Ginkgo Baloba trees are known to have flourished during the Eocene Thermal Maximum 55 million years ago when CO2 levels were very much higher than today.

Answer 5

Most plants require C02 to help them move nutrients and water from their roots to the rest of the plant.  

Increased atmospheric carbon dioxide doesn't just make a plant bigger. Carbon dioxide also makes plants more resistant to extreme weather conditions. In a study discussed in the journal Plant Ecology, a team of scientists subjected the Mojave Desert evergreen shrub to three different concentrations of carbon dioxide - the current level of 360 ppm and at 550 ppm and 700 ppm. The plants, which were being grown in simulated drought conditions, responded more favorably in the carbon dioxide-rich environments. Photosynthetic activity doubled in the 550 ppm environment and tripled at 700 ppm. Increased photosynthetic activity enables plants to withstand drought better. (see sources below)

Since many scientists have found that C02 levels increase in the atmosphere after a warming trend this could be natures way of making plants tougher in readiness for extreme weather conditions or to keep them from going completely extinct if a strange freeze or drought.  

This also could lead credence that the theory that the cycle of warming and cooling trends are extremely regular and after warming and increased C02 levels plants can withstand cooler dryer weather conditions often found in an ice age.

Definitely something to think about.