Interspecific Interactions. Reading: Freeman, Chapter 49. The Niche. The niche is one of the most important concepts in ecology. Paradoxically, it is also one of the hardest to define (Ecology is still a young science).
Reading: Freeman, Chapter 49
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.
Cycles in the population dynamics of the snowshoe hare and its predator the Canadian lynx (redrawn from MacLulich 1937). Note that percent mortality is an elusive measure, it may, or may not, be useful since mortality varies with environment and time.
In the 1920s, A. J. Lotka (1925) and V. Volterra (1926) devised mathematical models representing host/prey interaction.