
Matthew S. answered 09/01/22
Experienced Middle School Tutor in Math and Science
If an invasive species, such as a large snake, enters a community that is not adapted to this predator, it is likely that a trophic cascade (a change in how energy is moved) in the ecosystem will occur. This specific disruption is currently occurring with the Burmese Python in Florida's everglades ecosystem.
The snake will most likely disrupt the food web by eating prey animals in its niche – small mammals, amphibians, and even larger mammals such as deer. As the snake comes to dominate this niche, other predators will lose their source of prey. Prey animals may also fail to adapt evasively to the snake's hunting method and will quickly lose population.
The downstream effects of an invasive species introduction are manifold. At its base, predator-prey interactions will change in the ecosystem. These changes, say a drastic decrease in herbivorous mammals, can lead to vegetative shifts such as a dramatic increase in ground cover. The vegetative change that occurs can affect the way in which water flows and shift physical features such as rivers and marshes.