Plants on land have taken up approximately 25 percent of the carbon dioxide that humans have put into the atmosphere. Theamount of carbon that plants take up varies greatly from year to year
Would this percentage increase as absoption efficiency rises with the concentration of CO2? Why does the amount vary from year to year?
However, those same carbonate ions are what shell-building animals like coral need to create calcium carbonateshells.
This reminds me of the evolutionary history of two groups of sponges. Carbon concentration in the atmosphere often determined which type dominated the other because they used different materials for their spicules (calcium and silica).
We perturb the carbon cycle by burning fossil fuels andclearing land
1 clear forests = removes biomass that absorbs and stores carbon and replace them with crops or pasture which store less carbon 2 releases carbon stored in soil
cooler temperatures
CO2 solubility is inversely proportional to temperature
The hydrogen reacts withcarbonate from rock weathering to produce bicarbonate ions
Does the rock types vary with the depth due to this process?
C4 plant species also have a potential advantage over C3 species in low-nutrient habitats.
Can we utilize C4 plants in CO2 sequestration projects to help reduce global warming, since they have high photosynthesis efficiency and low demand for nutrition and water?
C4 photosynthesis has evolved independently approximately fifty times but is most widespread in grasses
A prime example of convergent evolution. What factor plays a bigger role in triggering the change? High temperature/water scarcity/abundant sunlight? Are there differences in C4 pathways that evolved under different circumstances?
Plants show a variety of adaptations to hot, dry conditions,
What about plants in dark and humid conditions? In theory they would need lower transpiration efficiency because they have adequate supply of water and have no worries about dehydration. This dilemma doesn't seem to apply to them, so is there other dilemmas between photosynthesis and transpiration these plants face?
r pressu
What is water vapor pressure in this situation and why not water vapor concentration? CO2 and water vapor are both gasses, why use different measurements?
(i.e., have high concentrations of photosynthetic en
Is this the only way to a higher rate of fixation?
leaf. The conductance to CO2 (gCO2) is a composite term made up of the rate of diffusion through the stomata, diffusion across theintercellular air spaces into the chloroplasts, and the rate of enzymatic fixation of carbo
Carbon fixation or сarbon assimilation is the process by which inorganic carbon is converted to organic compounds by living organisms.