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A video on the workings of celluar respiration

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A video on the workings of celluar respiration

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ATP & Respiration: Crash Course Biology #7

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When the energy used to celluar respiration and feces is gone, biomass increase is what the energy is used for. This is what the next tropic level gets when it consumes the organism.

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A process that produces metabolic reactions take place in the cells of organisms to convert biochemical energy from nutrients into (ATP), and then release waste products. This energy is used to do everyday things like move around

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Poop essentially. Egesting waste is the process of discharging waste from the body.

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Food chains are not a good representation of the whole ecosystem. The food web is a better representation because one organism doesn't only eat one type of food, it eats a variety of foods. For example, the hawk eats grasshoppers, spiders, shrew and weasels, not just weasels.

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Some biomes are just have more energy than others. The total energy that a biome can produce is the amount of energy photosynthesis can be converted to plants. As we can see the open ocean and tropical rainforests have high primary productivity levels. This is because there is sunlight all year round, so the plants can keep converting energy.

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Plants need carbon dioxide, water and light from the Sun to make glucose and oxygen. The glucose is used and the oxygen is created as a waste product. The animals use the oxygen to breathe which creates carbon dioxide and water. The water is used and the carbon dioxide is used for the plants. The cycle goes on and on and on. This is called a nutrients cycle.

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Of course, there are the decomposers. Decomposers break down organic material left over by the consumers.

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Of course not all energy is being passed on to the next tropic level. The pyramid is shaped like this because as you go up to pyramid steps (tropic levels), the amount of potential energy you can get gets smaller. This is because each organism produces waste and has cellular respiration. These do not directly contribute to the energy being passed on because biomass increase (growth) is the only way the next level predator can get more energy. Birds do not eat the worm's poop, they eat the worm. So as a general rule, most organisms only pass on 10% of the energy they use is actually being passed on. As we can see from this example, the secondary consumers only get 10% of the energy available to them through the primary consumer to use.

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Photosynthesis is the process by which plants use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the pigment chlorophyll, and generates oxygen as a waste product.

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The food chain starts when the producers get their energy from the sun. The only available energy in an ecosystem is that of the energy all the plants produce from an ecosystem. This total energy that plants produce is called Primary Productivity.  In our example, the detritus and algae use photosynthesis to make energy. Then, the small, fish, insects and crustaceans (primary consumers) eat the producers. That means energy from the detritus and algae get passed on to the small fish and insects.  Then, large fish (secondary consumers) eat the small fish and insects and crustacean, which further passes on energy to the next tropic level. As we go higher on the pyramid, the same the happens, the large fish pass on energy to the osprey.

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A food chain is a representation of the flow of energy through an ecosystem.