Two organisms cannot occupy exactly the same niche.
This is sometimes called Gausse’s rule(although Gausse never put it exactly that way).
-Experiments by Gausse (Paramecium), Peter Frank (Daphnia), and Thomas Park (Triboleum) have confirmed it for simple laboratory scenarios.
-This creates a bit of a paradox, because so many species exist in nature using the same resources.
-The more complex environments found in nature may enable more resource partitioning.