Kettle bogs are closed ecosystems because they have no water source other than precipitation.
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This closed ecosystem present distinctive fauna display.
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The wetland forms a closed ecosystem due to the shape of the crate which the wetland is placed.
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:Well, the bottle isn't a closed ecosystem in that it relies on outside light.
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The closed ecosystem of the cave was so stable that it couldn't handle the appearance of humans.
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Closed ecosystems research focusing on growing plants and recycling waste was resumed in 2005 in cooperation with European Space Agency.
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"It was the boldest attempt ever " to create a closed ecosystem, said David Tilman, a University of Minnesota scientist, but it failed miserably.
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MELiSSAs aim is to ideally create an artificially closed ecosystem to autonomously recycle the wastes to oxygen, water and food with only the input of energy to drive the process.
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Among his projects is a book about his experiences in Biosphere 2, a huge sealed greenhouse in the Arizona desert that was hyped as the most ambitious closed ecosystem in history.
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The tale of mnemiopsis _ pronounced ne-me-op-sis _ reflects the devastation that a single alien species can cause in an almost closed ecosystem like the Black Sea.
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