I think the idea that a healthy habitat can be kept in a jar is a misguided one. What was the ecosystem in this example, really? Some sea lettuce, algae, some n

I think the idea that a healthy habitat can be kept in a jar is a misguided one. What was the ecosystem in this example, really? Some sea lettuce, algae, some nematodes and a dead crab. That's not healthy, diverse, or complex. The real thesis should be: without room, natural ecosystems will turn more like this jar: barely holding on at a low level. What we can do is put less pressure onto a natural ecosystem. For example, not digging little parts of it up to keep, essentially as pets. Related, higher, more complex organisms need room to range. Remove one, and a large part of the surrounding environment is affected.