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The Nutrient Cycle | SSWM - Find tools for sustainable sanitation and water management!

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The model above demonstrates energy flowing through living organisms. Energy is passed on by the order of producer, consumer, and decomposer. In order to have energy, the producer has to perform photosynthesis to absorb energy from the sun. Energy moves through living organisms in an ecosystem by having the organisms eat the producers first. The energy keeps flowing, or being passed on, by having organisms eat other organisms until they die. When they die, the energy is passed onto the decomposers because they eat the dead organisms, and the remaining energy is used for the producers to grow (nutrient cycle). Some of the energy in the organisms is no longer usable and turn into heat energy because they have to use their energy in order to live, grow, etc. All of the terms above are used to explain, or demonstrate, in depth, of how energy flows through an ecosystem.

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Cellular respiration is used to do anything. In the model above, the boy eats a pie and breathes in oxygen. The pie (glucose means food) and the oxygen is converted to carbon dioxide, water, and ATP by the mitochondria. ATP is the energy that makes you walk, read, or even sleep. Basically, if you do not have cellular respiration, you will not be able to do anything.

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The producers, the organisms that produce energy, gets their energy from the sun by photosynthesizing. The herbivores, which are a type of consumers, eat the producers. They only receive 10% of the energy from the producers. The herbivores are then eaten by the carnivores, which are a form of consumers. The carnivores only get 10% of the energy from the herbivores. This process of being eaten from a higher level of consumers is repeated until there is not enough energy to create a new level of consumers. Only 10% of the energy is passed onto each level and each level of consumers is called a trophic level. As the trophic levels get higher, there are fewer organisms because there is only enough energy to fed a certain amount of them.

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ATP & Respiration: Crash Course Biology #7

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The process of breaking down food molecules into carbon dioxide, water, and ATP. The energy obtained is used to do activities such as moving, running, etc.

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How much calories (energy) are produced by the producers for an ecosytem

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Growth Primary Productivity (GPP)         Net Primary Productivty (NPP)

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Growth Primary Productivity (GPP)         Net Primary Productivty (NPP)

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Primary Productivity

Primary productivity is a term used to describe the rate at which plants and other photosynthetic organisms produce organic compounds in an ecosystem. There are two aspects of primary productivity:

Gross productivity = the entire photosynthetic production of organic compounds in an ecosystem.

Net productivity = the organic materials that remain after photosynthetic organisms in the ecosystem have used some of these compounds for their cellular energy needs (cellular respiration).

Since oxygen is one of the most easily measured products of both photosynthesis and respiration, a good way to gauge primary productivity in an aquatic ecosystem is to measure dissolved oxygen. We cannot measure gross productivity directly because respiration, which uses up oxygen and organic compounds, is always occurring simultaneously with photosynthesis-but we can measure it indirectly. Let's see how to do this.

We can measure net productivity directly by measuring oxygen production in the light, when photosynthesis is occurring.

We can also measure respiration without photosynthesis by measuring O₂ consumption in the dark, when photosynthesis does not occur.

Since net productivity = gross productivity − respiration, we can calculate gross productivity.

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Primary productivity is a term used to describe the rate at which plants and other photosynthetic organisms produce organic compounds in an ecosystem. There are two aspects of primary productivity: Gross productivity = the entire photosynthetic production of organic compounds in an ecosystem.

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The total mass, or weight, of an organism

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Energy Efficiency Model of a Caterpillar

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Energy Efficiency Model of a Caterpillar

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Wasted energy that cannot be used by other organisms

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All living organisms depend on the producers. If one of the consumers or the producers become extinct, then the whole ecosystem will collapse.

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Waste material from an organism (poop)

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A process found commonly in producers such as plants. Producers absorb energy (the sun) in order to support their activities. If the producers do not absorb enough energy from the sun, then the producer's ecosystem will be small because all of the organisms (consumers) depend on how much energy the producers have. Photosynthesis is a major key for energy flow in an ecosystem.

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Waste or debris of any kind

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Organisms that consume detritus, or dead, organic material

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Organisms that eat the producers or other organisms in order to get energy

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Organisms that creates, or generate, energy