What is productivity in ecosystem Class 12?

Primary productivity is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. Primary productivity is expressed in terms of weight (g–2) or energy (kcal m–2 ).

What is productivity in an ecosystem?

In ecology, productivity is the rate at which energy is added to the bodies of organisms in the form of biomass. … Productivity can be defined for any trophic level or other group, and it may take units of either energy or biomass. There are two basic types of productivity: gross and net.

Which is productive ecosystem?

Name the most productive ecosystems.

Swamps. Marshes. Tropical rainforests. Temperate rainforests.

What is productivity and levels in ecosystem?

Productivity within an ecosystem can be defined as the percentage of energy entering the ecosystem incorporated into biomass in a particular trophic level. Biomass is the total mass in a unit area (at the time of measurement) of living or previously-living organisms within a trophic level.

What is productivity and its types EVS?

Productivity in an ecosystem refers to the percentage of energy that enters the ecosystem in the form of biomass at a particular trophic level. … Thus, the total productivity of its ecosystem is measured based on two aspects- Primary productivity and secondary productivity.

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What is meant by productivity?

Productivity is commonly defined as a ratio between the output volume and the volume of inputs. In other words, it measures how efficiently production inputs, such as labour and capital, are being used in an economy to produce a given level of output.

What is productivity in bio?

The amount and rate of production which occur in a given ecosystem over a given time period. Biological productivity may apply to a single organism, a population, or entire communities and ecosystems.

How is the productivity of an ecosystem measured?

The total amount of biological productivity in a region or ecosystem is called the gross primary productivity. … Primary productivity is usually determined by measuring the uptake of carbon dioxide or the output of oxygen. Production rates are usually expressed as grams of organic carbon per unit area per unit time.

What are the different productivity ecosystems?

According to Odum there are three types of productivities – primary productivity, secondary productivity and community productivity.

What is productivity in aquatic ecosystem?

aquatic ecosystems

Net marine primary productivity is the amount of organic material available to support the consumers (herbivores and carnivores) of the sea. The standing crop is the total biomass (weight) of vegetation. Most primary productivity is carried out by pelagic phytoplankton, not benthic plants.

Why is productivity important to the ecosystem?

Primary productivity is the conversion of the sun’s energy into organic material through photosynthesis. … Primary productivity is important because it is the process that forms the foundation of food webs in most ecosystems.

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What is productivity a level biology?

Primary and secondary productivity is the rate of primary or secondary production, respectively. It is measured as biomass in a given area in a given time e.g. kJ ha^–1 year^–1. The percentage efficiency of energy transfer from one tropic level to another can be calculated as.

What is primary productivity example?

The primary productivity of an ecosystem is defined as the speed at which the solar energy is turned into an organic substance by chlorophyll in the photosynthesis. An example is that of estuaries, one of the most productive ecosystems in the world. …