Please clarify who "Edward" is. There are many scientists named Edward who may have conducted ecological experiments.

To help me understand your question, please provide more context about:

* Edward's full name: This will help me identify the correct scientist.

* The type of ecological experiments: Was it about population dynamics, ecosystem interactions, or something else?

* The time period of the experiments: This will help me narrow down the possible experiments.

Once you provide more details, I can give you a more accurate answer about what Edward's ecological experiments indicated.