Factors affecting the rate of photosynthesis 3. Carbon Dioxide Carbon dioxide is used to make sugar in the photosynthesis reaction. An increase in the concentration of carbon dioxide gives an increase in the rate of photosynthesis.
Many cyanobacteria form motile filaments of cells, called hormogoniathat travel away from the main biomass to bud and form new colonies elsewhere. To break away from the parent colony, a hormogonium often must tear apart a weaker cell in a filament, called a necridium. Each individual cell each single cyanobacterium typically has a thick, gelatinous cell wall.
In water columns, some cyanobacteria float by forming gas vesiclesas in archaea. They are not bounded by lipid membranesbut by a protein sheath. Ecology[ edit ] Cyanobacterial bloom near Fiji Cyanobacteria can be found in almost every terrestrial and aquatic habitat — oceansfresh waterdamp soil, temporarily moistened rocks in desertsbare rock and soil, and even Antarctic rocks.
They can occur as planktonic cells or form phototrophic biofilms. They are found in almost every endolithic ecosystem. Some live in the fur of slothsproviding a form of camouflage.
The blooms can have the appearance of blue-green paint or scum. These blooms can be toxicand frequently lead to the closure of recreational waters when spotted. Marine bacteriophages are significant parasites of unicellular marine cyanobacteria.
For this reason blooms of cyanobacteria seldom occur in rivers unless the water is flowing slowly. Growth is also favored at higher temperatures, making increasing water temperature as a result of global warming more problematic.
At higher temperatures Microcystis species are able to outcompete diatoms and green algae. This is a concern because of the production of toxins produced by Microcystis.
This can lead to serious consequences, particularly the contamination of sources of drinking water. Cyanobacteria can interfere with water treatment in various ways, primarily by plugging filters often large beds of sand and similar mediaand by producing cyanotoxins which have the potential to cause serious illness if consumed.
Consequences may also lie within fisheries and waste management practices. Anthropogenic eutrophicationrising temperatures, vertical stratification and increased atmospheric carbon dioxide are contributors to cyanobacteria increasing dominance of aquatic ecosystems.
It has been widely reported that cyanobacteria soil crusts help to stabilize soil to prevent erosion and retain water. The tiny marine cyanobacterium Prochlorococcus was discovered in and accounts for more than half of the photosynthesis of the open ocean.The rate of photosynthesis is affected by a number of factors including light levels, temperature, availability of water, and availability of nutrients.
each of the variables affected the rate of photosynthesis. Further discussion questions are: What ecological factors affect the various variables we observed as. Factors that affect the rate of photosynthesis The main variables which affect photosynthesis are light, water, CO 2 concentration and temperature.
On a deeper level, other factors like amount of chlorophyll, availability of nutrients (eg Mg is needed for chlorophyll synthesis) will also affect the rate of photosynthesis, though these are. MODULE - 2 Forms and Function of Plants and Animals BIOLOGY Notes Photosynthesis In photosynthesis CO2 is fixed (or reduced) to carbohydrates (glucose C6H12O6).
Water is split in the presence of light (called photolysis of water) to release O2. Note that O2 released comes from the water molecule and not from CO2. Where does photosynthesis occur?
The effect of Light Colour on the Rate of Photosynthesis To what extent does the colour of light have on the rate of photosynthesis on Cabo.
Factors affecting the rate of photosynthesis The term rate always involves time, so the rate of photosynthesis can be considered to be how fast photosynthesis takes place.
This can be measured by the amount of glucose produced by a plant over a given time.