Early spring is a tricky time for plants due to the combination of sunny but still quite cold days.
To transform atmospheric CO2 into organic molecules, plants can use the energy from
Carbon capture is performed by the green parts of plants via photosynthesis.
The effect of light on photosynthesis has a clear saturating pattern: more light results in more photosynthesis but eventually leaves cannot take full advantage of all the extra light.
The rate of respiration decreases with temperature.
Carbon becomes locked as part of the accumulating plant biomass as plants grow.
Almost half of the total biomass of a tree may be allocated to the roots.
In general, the more carbon dioxide that is available to the plant, the faster the rate of photosynthesis - if other factors are favourable.
De-hardening in spring involves gradual re-hydration of the cells, recovery of photosynthetic capacity and a tight control of water loss.
A complex microbiota lives belowground, releasing carbon dioxide to the soil.
High soil moisture leads to decreased photosynthesis.
In boreal upland forests, low soil moisture decreases the rate of photosynthesis.
What is the source of carbon that is assimilated in photosynthesis?
Photosynthesis of a tree canopy is driven or influenced by
air humidity (VPD).
soil moisture (REW).
the total leaf area (LAI).
air temperature (T).
photosynthetically active solar radiation (PAR).
In some part of the stems, some photosynthesis may also occur.
Plant respiration captures CO2.
Unlike photosynhesis, plant respiration captures atmospheric oxygen and releases carbon dioxide.