David Latimer is a man who planted his bottle garden in 1960 for the first time, watered it in 1972 for the last time, and then tightly sealed it shut in order to conduct ‘an experiment’.
Here is what happened to the bottle garden…
His bottle garden has made its own mini ecosystem. Even though this garden was being cut off from the outside world, it was still able to absorb light and thus photosynthesize and perform this process by which plants turn sunlight into the energy they need to grow.
The process of photosynthesis is inverse process of the cellular respiration that takes place in other organisms, including humans, where the carbohydrates, the compounds that contain energy react with oxygen and produce carbon dioxide, water, and release chemical energy.
Still, the ecosystem also utilized cellular respiration in order to break down the decaying material that the plants have been shedding. At this point of the process, the bacteria present in the soil of the bottle garden absorb the waste oxygen of the plants and release carbon dioxide, which is then reused by the growing plants.
At night, when there is no sunlight and the process of photosynthesis is prevented, the plants were using cellular respiration to keep themselves alive by breaking down the stored nutrients.
Considering the fact that the bottle garden is a closed environment, we can easily conclude that its water cycle is also a self-contained process.
The roots of the plants take up the water in the bottle and release it into the air via the process of transpiration. This released water condenses down into the potting mixture and the cycle starts again.
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