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Secondary production is sometimes defined to only include consumption of primary producers by herbivorous consumers [18] (with tertiary production referring to carnivorous consumers), [19] but is more commonly defined to include all biomass generation by heterotrophs.
A tertiary carbon atom is a carbon atom bound to three other carbon atoms. [1] For this reason, tertiary carbon atoms are found only in hydrocarbons containing at least four carbon atoms. They are called saturated hydrocarbons because they only contain carbon-carbon single bonds. [2] Tertiary carbons have a hybridization of sp3.
Gross primary production (GPP) is the amount of chemical energy, typically expressed as carbon biomass, that primary producers create in a given length of time.Some fraction of this fixed energy is used by primary producers for cellular respiration and maintenance of existing tissues (i.e., "growth respiration" and "maintenance respiration").
According to the three-sector model, the main focus of an economy's activity shifts from the primary through the secondary and finally to the tertiary sector. Countries with a low per capita income are in an early state of development; the main part of their national income is achieved through production in the primary sector. Countries in a ...
Marine primary production is the chemical synthesis in the ocean of organic compounds from atmospheric or dissolved carbon dioxide. It principally occurs through the process of photosynthesis , which uses light as its source of energy, but it also occurs through chemosynthesis , which uses the oxidation or reduction of inorganic chemical ...
Net ecosystem production (NEP) in ecology, limnology, and oceanography, is the difference between gross primary production (GPP) and net ecosystem respiration. [1] Net ecosystem production represents all the carbon produced by plants in water through photosynthesis that does not get respired by animals , other heterotrophs , or the plants ...
In addition, each position on an alkyl chain can be described according to how many other carbon atoms are attached to it. The terms primary, secondary, tertiary, and quaternary refer to a carbon attached to one, two, three, or four other carbons respectively.
In the food chain, heterotrophs are primary, secondary and tertiary consumers, but not producers. [3] [4] Living organisms that are heterotrophic include all animals and fungi, some bacteria and protists, [5] and many parasitic plants.