Principles of Ecology. What is ecology?. Ecology : study of interactions that take place between organisms and their environment. Habitat vs. Niche. Habitat : place where organism lives Niche : role or position a species has in its environment.
Principles of Ecology
Symbiosis: interactions between 2 species “living together”
Clownfish is protected, while providing a lure for the anemone.
Some say that this relationship can be commensalistic.
Get food and pollination of flowers!!
Competition: is the interaction between organisms where the fitness of one is lowered by the presence of another. Organisms will not benefit because they are competing for limited resources (food, water, space, mate, etc.)
Typical examples: fungus and bacteria
berries → mice → black bear
1. Label each of the organisms either as producers, primary, secondary tertiary or quaternary consumers, carnivores, herbivores and predators in this food web.
Copy food web in your notebook
2. Analyze the food web and Explain the balance that is upset when a major predator is removed from an ecosystem.
Pyramid of Energy
Parasites, scavengers, and decomposers feed at each level.
Number pyramid- A pyramid of numbers shows the numbers of individual organisms at each trophic level in an ecosystem. A vast number of producers are required to support even a few top level consumers
Cyclical process, whereby matter (carbon) is recycled in the environment.
The nitrogen cycle mostly takes place underground