Begin by selecting a freshwater or marine aquatic ecosystem as a model for your food web. Be specific. Choose a specific lake. Or, if you choose an ocean ecosystem, identify its geographical area and depth. Keep in mind that deep-sea organisms live in a completely different environment than surface aquatic organisms.
Next, conduct research on the following conditions in the ecosystem you chose. They influence the types of organisms that can live there.
geographical features
temperature
depth/light availability
salinity
pH
unique features that contribute to the ecosystem, such as other bodies of water that connect to it, unusual chemistry, and climate
Using the information you gathered, write a paragraph that describes conditions in the ecosystem.
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The condition or quality of an ecosystem is measured with the aid of a set of ecological key indicators, which relate to both the system’s ecological condition and its capacity to supply ecosystem services. For arable land, for example, the amount of available carbon is relevant, as this affects the production of food and food crops, while for forests biodiversity and tree age may be relevant for various other services.
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