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Thursday, 18 October 2018

Components of an Ecosystem

The living part of an ecosystem is known as biotic component. It is composed of all living organisms in the environment, often called the biotic community. In an ecosystem, the biotic community includes populations of

• food producers, i.e. Autotrophs like green plants, protophyta and chemosynthetic bacteria;

• food consumers, i.e. heterotrophs such ad animals, protozoa and some bacteria; and

• decomposers, I.e. saprophytes like fungi and some bacteria.

    The non living part of an ecosystem is its abiotic components. It consists of abiotic resources and abiotic conditions

Abiotic resources:

  These are what organisms need in order to stay alive. They include a source of energy -- sunlight -- from outside the ecosystem; and inorganic nutrients like carbon dioxide, water, nitrogen, phosphorus, etc.

Abiotic conditions:

   These affect the behavior, growth and breeding patterns of organisms and so determine the kind of organisms that are found in a particular ecosystem. These conditions include

• air , water and soil, I.e. the habitat; and
• factors such as temperature, light intensity, humidity, water currents, wind , turbidity, etc.