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The productivity of autotrophs, such as plants, is called primary productivity, while the productivity of heterotrophs, such as animals, is called secondary productivity. [ 1 ] The productivity of an ecosystem is influenced by a wide range of factors, including nutrient availability, temperature, and water availability.
One of the factors that controls primary production is the amount of energy that enters the producer(s), which can be measured using productivity. [12] [13] [1] Only one percent of solar energy enters the producer, the rest bounces off or moves through. [13] Gross primary productivity is the amount of energy the producer actually gets.
The fraction of that energy that is converted into glucose reflects the gross productivity of the blade of grass. The energy remaining after respiration is considered the net primary production. In general, gross production refers to the energy contained within an organism before respiration and net production the energy after respiration.
A farmer can invest a large amount of money to increase his yields by a few percent, for example with an extremely expensive fertilizer, but if that cost is so high that it does not produce a comparative return on investment, his profits decline, and the higher yield can mean a lower agricultural productivity in this case. A yield is a 'partial ...
Water-use efficiency (WUE) refers to the ratio of plant biomass to water lost by transpiration, can be defined either at the leaf, at the whole plant or a population/stand/field level:
With 30 miles (48 km) of tall black temporary fencing, 25,000 law enforcement officers and security checkpoints set up to process hundreds of thousands of spectators, Washington is braced for ...
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 themselves.
Financial experts are weighing in on potential economic shifts as the presidential transition approaches. Of course, nobody knows for sure what's coming, but experts have predictions as to how...
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