I’m doing a bottled ecosystem project for biology and I have no clue how to start it. We are suppose to have the ecosystem last for 2 months. Should terrestrial go on top, so when the water evaporates the plants are watered? What organisms should I put in there that will last 2 months. What plants could give off a lot of oxygen to keep the organisms alive( its Fall). I live in Montana and I need organisms that I can get fast.

Anything is appreciated!!!!!!! Thanks

I need an original definition for ecosystem…..?

The book definition is

Ecosystem- a community of organisms and their abiotic, or non living environment.

what will happen to the other organisms in the food web if all frogs in the ecosystem were killed?