Final answer:
A re-created ecosystem in a lab environment is called a microcosm, which allows scientists to study ecosystem dynamics under controlled conditions, but may not fully represent the ecosystem's true nature.
Step-by-step explanation:
A re-created ecosystem in a laboratory environment is known as a microcosm. This scientific method involves simulating an ecosystem on a small scale to study its dynamics under controlled conditions. By recreating ecosystems within microcosms, scientists can observe interactions and processes that are otherwise difficult to monitor in the natural environment. However, it's important to note that a microcosm does not always fully predict the changes that might occur in the original ecosystem due to possible alterations in species numbers, diversity, and environmental conditions.
Scientists may also use mesocosms, which are partitions of a natural ecosystem designed for experimental investigation. In contrast to microcosms, mesocosms include an actual part of the natural environment but still alter the natural dynamics to some extent. It is critical to understand that both microcosms and mesocosms may not completely represent the true nature of ecosystems, as the artificial conditions may change how organisms behave and interact.