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Ecosystems. An ecosystem consists of all the organisms living in one place as well as the physical environments they live in.

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A physical environment is made up of non-living components in an ecosystem.

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Our planet has two types of physical environments, terrestrial environments and aquatic environments.

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Terrestrial environments are found on land and are surrounded by air.

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Aquatic environments have seawater environments, such as seas and oceans, and freshwater environments, such as rivers and lakes.

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The rest are environments. And this is aquatic environment.

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Living things in an ecosystem are all animals, plants, fungi, algae and bacteria.

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An ecosystem has a particular fauna and flora.

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Fauna refers to all the animals. For example, whales, horses, crocodiles, etc. Flora refers to all the plants, like poppies, pine trees, etc.

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Organisms of one species form a population. All the population in one ecosystem form a community.

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organism, population, community.