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What is the difference between environment, ecosystem, and ecological community?

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Environment refers to one's overall surrounding that facilitates growth and development. An environment becomes inhabitable when it has the resources that a species needs for it to persist. This brings us to the next terminology in question. Ecosystem, on the other hand, refers to the communities of organisms AND their non-living environment in which nutrient cycle and energy flow occurs. Notice the emphasis on the word AND, as this implies that when we talk of ecosystem, we refer to organisms and environment, and their interaction with each other and with their environment. A food chain would be a good example of this interaction. These interacting organisms are what comprise an ecological community. Specifically, an ecological community refers to the species of plants, animals and other organisms interacting at the same time within a common habitat.
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An environment is the sum total of the immediate surroundings of an organism which it interacts with. This could be physically, biological, chemical etc. Anything immediate that affects organism is part of its environment. Man has his environment likewise plants an animals. Whereas, these organisms can coexist and this brings us to ecological community.
An ecological community could be a group of related organisms or different species which are interacting and coexisting within the same environment or community. Example is grasses and grasshoppers.

An ecosystem however can be a group of different communities interacting with all the abiotic(non living) factors around them. Example is the community of grasses, trees, plants and animals that are interacting with factors such as light, pressure, oxygen etc. Note that a community can also be an ecosystem since it interacts with non living factors.
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Environment happens to be the various habitats where living organisms dwell. And this environment does not only comprise of these living organisms, but also the several factors that enable them to thrive via interaction with them. Interestingly, man also have his own environment, which he uses to carry out his day to day activities.

Ecosystem is the collection of organisms that are of different species living together in an environment through interaction among themselves as well as non living things(abiotic factors). In other words, ecosystem is the interaction of living organisms(biotic) with the abiotic factors such as pressure, sunlight, rainfall, ph(acid and alkaline), temperature. A typical activity taking place in the ecosystem is the food chain and food web. These two energy flow systems gives perfect idea how nutrients are distributed among living organisms in the ecosystem.

Ecology on its own, it the interaction of either plants or animals with their environment within a specific habitat.
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These three terms are different in their means but have strong relationships whichs makes them interdependent.
The Environment is the overall system that comprises of living,  non livings and their relationship with other,  it is the umbrella to both ecology and ecosystem.  The comfort of the environment depends largely on the ecosystem and ecological nature .

Ecosystem which simply the relationship between the biotic factors (living things)  and the abiotic factors (non living things) . Such as the Man and soil,  animals with water etc

Ecology refers the inter relationship between the different set of living organisms present in an environment for instance the plant are important to us as human like wise we are too especially in terms of gaseous exchanges.
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An Ecosystem is an interaction of both biotic ( Living) and non-biotic ( Non-Living) components these link can be due to the exchange of energy and biogeochemical cycle. Whereas community has an interaction among the populations of biotic components only which can be of same or different species living in particular area. Environment provides living space for the elements. 
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Environment

 The environment is the sum of all external physical, chemical and biological factors that affect an organism or community. 

Ecosystem

 An ecosystem is a dynamic complex of plant, animal, and microorganism communities and their non-living environment interacting as a functional unit. 

Ecological Community

 An ecological community is a group of species that interact with each other in a specific environment. It consists of populations of different species that interact with each other and with their physical environment.
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The environment refers to the physical and biological factors that surround and interact with living organisms. An ecosystem refers to a community of living organisms and their interactions with each other and with their physical environment. An ecological community refers specifically to the community of living organisms within an ecosystem, including plants, animals, and microorganisms, and their interactions with each other.
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The three most common definitions of the word "environment" are:

1. A setting for the survival of organisms in which the environmental conditions are unique and delicate.

2. The whole system of factors that affect thecks and vesicles in order to produce a product or powder 

3. A setting for the protection of life and the environment within which it occurs.
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A community is made up of populations of different species or organisms. These are biotic factors such as plants, animals, and bacteria. While an ecosystem is made up of a community, it also includes the abiotic factors in the environment such as the temperature, water, and the landscape of the area.
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Environment refers to the surroundings, whereas, ecosystem is the interaction between the environment and the living organisms. Environment is the area where living organisms live. Ecosystem is the community where the biotic and abiotic elements interact with each other.
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Notice the emphasis on the word AND, as this implies that when we talk of ecosystem, we refer to organisms and environment, and their interaction with each other and with their environment. A food chain would be a good example of this interaction. These interacting organisms are what comprise an ecological community
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A food chain would be a good example of this interaction. These interacting organisms are what comprise an ecological community. Specifically, an ecological community refers to the species of plants, animals and other organisms interacting at the same time within a common habitat.
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