... limitation in one of these twomajor parts of photosynthesis will have an immediateimpact also on the other one. Therefore, the efficiency of the photosynthetic process is highly dependenton the ambient ... appear-ance of clouds and the leaf movement by wind. Biotic in uences depend mainly on the individual position of a plant within an ecosystem, the density of the plantstand or, in case of algae, ... (in the range of seconds to minutes)and a long-term timescale (in the range of hours, daysand seasons). Important abiotic determinants include the geographical latitude of the ecosystem, the...