2. natural variations in weather patterns have effects on certain populations. a warm damp spring for example, is ideal for small rodent species and certain insects, who benefit from the lush vegetation produced by this pattern. as a result, their populations swell to high levels. in the end however, this doesn’t result in population growth at the higher tropic levels. you don’t end up with more predators, just fatter predators. what limits the ability of the higher tropic levels to grow in response to the increased availability of food?
Decomposers make up an important part of any ecosystem. Their primary role is to break down the dead and decaying matter of all the trophic levels into simple nutrients that goes back into the soil. This helps the producers in getting their nourishment. Thus, they are the recycling matter in the ecosystems. The recycling of matter indirectly benefits the primary consumers that depend on the producers for their food.
The relationship between tropic levels and energy is that tropic levels contain a certain amount of energy depending of which level they are, the lowest tropic level will have the highest amount of energy, whilst the highest tropic level will have the lowest amount of energy.
The role of the organisms in the first tropic level is to produce food since they are autotrophs, these organisms do not rely on others for food. the organisms in the second level will control the amount of primary producers and will serve as food for tertiary consumers. The role of the organisms in the third level is to get food from secondary consumers so they don't overpopulate and affect primary consumers more than they have to.
Energy availability changes at each level because of the 10 percent rule. As you go higher, only 10 percent of the energy can actually be consumed by the consumer in the next level.
The tropic level of an organism is the position it occupies in a food web. A food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves. The tropic level of an organism is the number of steps it is from the start of the chain.
The energy pyramid indicates how energy is transferred from one organism to the next on the food chain. There are four main levels, starting at the base with producers that take energy from the sun, and moving upward to primary, secondary and tertiary consumers. The pyramid of numbers represent the number of organism in each trophic level.