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Nicky Sapnar Ecosystems are self-sustaining Sunshine is essential for an experimental ecosystem b/c it is the only energy source to sustain the humans and animal species in the closed system No gases or organisms could leave or enter the system Ecosystems need a variety of animals (I) They needed to have food for 8 and life support for the animals that would provide the food In an ecosystem everything needed in life recycles Before long the oxygen dropped from 21% to 14%, A DANGEROUS LEVEL FOR HUMANS The soil in biosphere 2 was too rich in organic matter , the population of microbes were growing out of control using all the oxygen Also an uninvited species known as crazy ants got into biosphere 2 and caused disruption in the community Crazy ants are stronger work in colonies and are more advanced than regular ants The biopsherians made it through the 2-year mission only barely and not without a little help, they needed oxygen pumped in from the outside In 1996 the university of Colombia took over research in Biosphere 2 You can never study ecosystems because you always have to account for variable change If you want to study ecosystems you have to find an ecosystem and put it in a box so you can control the variables If the world had more Carbon dioxide we would die because it wouldn’t allow rain which wouldn’t allow photosynthesis and then we wouldn’t get energy or protein so we would die (I) W/out phytoplankton or coral reefs life in the ocean is in jeopardy (I)