Ecosystems are living things, constantly changing and moving. Not only do the animals move, but so do the things that they need. Energy moves, Nutrients and chemicals move. And it happens all the time. 24 hours a day bacteria work to get Nitrogen ready for the plants.
Plants grow and make food for animals.
The sun shines on the plants during the day and warm up the area. You need to remember that things are always happening, even if you don't see it moving, it is. Sure you know that you can't control the weather, or the tides, but you have a huge influence over your small ecosystem and the world. You affect the biosphere every day. Think about the people who still use coal to power generators in China.