Energy Flow Through a Food Web
Now, let's look at how much energy actually flows through the food web. We know that plants and animals use energy in their daily activities, and we also know that plants and animals store energy within their tissues. So, how much energy is used by an organism, and how much is stored? The answer actually varies based on many factors, such as the type of organism, but there are a few key rules of thumb that we can use to estimate how much energy is used and how much is available to the next trophic level of the food web.
First, let's start with the autotrophs. Organisms that use photosynthesis to harness energy are only able to convert about one percent of the total light energy that hits them into usable chemical energy. Of the energy that is harnessed by producers through photosynthesis, about 30% is used during metabolic processes and dissipated as heat, and about 70% becomes stored energy.
Energy Flow Through a Food WebNow, let's look at how much energy actually flows through the food web. We know that plants and animals use energy in their daily activities, and we also know that plants and animals store energy within their tissues. So, how much energy is used by an organism, and how much is stored? The answer actually varies based on many factors, such as the type of organism, but there are a few key rules of thumb that we can use to estimate how much energy is used and how much is available to the next trophic level of the food web.First, let's start with the autotrophs. Organisms that use photosynthesis to harness energy are only able to convert about one percent of the total light energy that hits them into usable chemical energy. Of the energy that is harnessed by producers through photosynthesis, about 30% is used during metabolic processes and dissipated as heat, and about 70% becomes stored energy.
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