What environmental rules and laws do you need to know when creating an artificial ecosystem?

Laws of nature management (laws of Barry Komoner):
1) Everything is connected with everything (In nature, everything is interconnected)
2) Everything should go somewhere (There is no unnecessary waste in nature)
3) You have to pay for everything (Everything taken from nature must be returned to it)
4) Nature knows better (It is necessary to withdraw from nature such an amount of resources that nature is able to restore itself)

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.