The Process of Photosynthesis in Plants
The beginning aquarist is likely to think that if there's enough light to see then it's enough for plants to grow.
However, that's not true. If you want to grow healthy plants, and not just algae, you need enough light for them to use for photosynthesis and create energy.
It used to be that people advised 3-4 watts per gallon as a VERY basic principle. But, due to modern lighting technology this is now considered an outdated notion (with PAR now more the norm).
red algae shows maximum photosynthesis in …
9. Photosynthetic utilisation of inorganic carbon and its regulation in the marine diatom . Chen, Xiongwen; Gao, Kunshan. Department of Biology, Hubei Normal University, Huangshi, Peop. Rep. China. Functional Plant Biology (2004), 31(10), 1027-1033. Publisher: CSIRO Publishing.
Photosynthesis is the first stage of energy flow through an ecosystem. You and all other animals on earth rely on the energy that plants store for life. But animals aren’t the only organisms that burn energy. Plants burn energy as they grow, too. In both plants and animals, the process of — which releases stored energy for use — occurs in the mitochondria inside each cell.
NOVA - Official Website | Illuminating Photosynthesis
arbon dioxide is able to cross cell membranes because it is a small uncharged molecule with reasonable solubility in organic materials. Consequently, organisms that take up carbon dioxide can do so passively (without spending any energy) and with no special mechanisms (such as proteins designed to speed up that process). Many marine algae and other organisms take up some measurable portion of the carbon dioxide that they incorporate during photosynthesis by this process.
01/01/2011 · Illuminating Photosynthesis
In most cases, however, this process can account for only a portion of the demand for carbon dioxide. The rate at which carbon dioxide is used by rapidly photosynthesizing organisms is fast enough that organisms can deplete the carbon dioxide in the surrounding seawater faster than it can be replaced by diffusion and other transport mechanisms through the seawater. The depletion is readily observed by the pH in the near surface regions of these organisms, where the pH rises due to carbon dioxide loss. For this reason many marine organisms have developed other means of obtaining carbon dioxide, including processes involving bicarbonate.
Animals need to eat food to get their energy
Environmental scientists recognize that the fundamental source of energy for most life on earth is the sun. Through photosynthesis, plants capture the light and convert it into chemical potential energy. Plants then store the potential energy in the form of (biological matter that fuels nearly every animal on earth).
But green plants and algae do not
nterestingly, three marine microalgae, , and , were studied for their rates of photosynthesis and carbon uptake mechanisms in continuous light vs. those same species in light/dark cycles (12 h on/12 h off and 16 h on/8 h off). The rates of photosynthesis were nearly twice as high with light/dark cycles as with continuous lighting. In two of the species ( and ), but not the third, the contribution of bicarbonate to the total carbon uptake increased dramatically in light/dark cycles compared to continuous light.