" C 0 2 " exists in solution in the cytoplasm of cells predominantly as the hydrated and deprotonated form, HCO~, and also (albeit in smaller proportion) as the unhydrated, dissolved gas form, CO2 (Fig. 1). "CO2" fixation denotes the process of incorporation into organic matter of any form of the inorganic "CO2" compounds, and involves the establishment of a covalent bond between the carbon ato...

Iron availability directly affects photosynthesis and limits phytoplankton growth over vast oceanic regions. For this reason, the availability of iron is a crucial variable to consider in the development of active chlorophyll a fluorescence based estimates of phytoplankton primary productivity. These bio-optical approaches require a conversion factor to derive ecologically-relevant rates of CO2...

Microalgae produce higher biomass and oil yields than traditional energy crops, and they can be cultivated on marginal land or in seawater. Additional benefits can be achieved from co-production of food, feed and high-value chemicals as well as from environmental services, such as bio-fixation of CO2 and wastewater treatment. However, biotechnical, environmental, and economic challenges need to...

As significant differences in cellular physiology, metabolic potential and genetics occur among strains with morphological similarity, the screening of appropriate microalgae species for effective CO2 fixation and biodiesel production is extremely critical. In this study, ten strains of Chlorella were cultivated in municipal wastewater influent (MWI) and their tolerance for MWI, CO2 fixation ef...

The major role in global net CO2 fixation plays photosynthesis of green plants, algae and cyanobacteria, but other microorganisms are also important concerning autotrophy; i.e. autotrophic microorganisms can be found in most bacterial groups (Eubacteria) and there are even numerous representatives within the Archaea. CO2 fixation is not only one of the world’s most important biogeochemical proc...

The predominant input of available nitrogen (N) in boreal forest ecosystems originates from moss-associated cyanobacteria, which fix unavailable atmospheric N2, contribute to the soil N pool, and thereby support forest productivity. Alongside climate warming, increases in atmospheric CO2 concentrations are expected in Canada’s boreal region over the next century, yet little is known about the c...