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This page from NASA provides a detailed description of the slow carbon cycle that covers 100-200 million years.
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This page from NASA provides a detailed description of the fast carbon cycle that covers a living being's lifespan. This version of the carbon cycle is focused on its cycle…
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This page from NASA provides facts about how the carbon cycle has been affected in the past by natural causes, and how it is being affected by humans today.
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This webpage provides a summary of keystone species, using elephants and their different habitats as an example.
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National Geographic explains what a keystone species is and why they are vital to the well-being of ecosystems. Foundation species, umbrella species, and indicator species are briefly covered as well.
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Within ecosystems, different species interact in different ways. These interactions can have positive, negative, or neutral impacts on the species involved.
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What happens when two similar species that consume the same resources occupy the same space? Interspecific competition, that's what! Watch our video lesson to learn about the outcomes of this…
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This page explains generally how food chains and food web works, and defines terms that relate to each. A section on biomaginification is also included. Nutrient cycles are also diagrammed…
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The U.S. Geological Survey lists different definitions of biomagnification and also gives links of other resources on the subject.
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The Extension Toxicology Network defines bioaccumulation, and includes some details on bioconcentration and biomagnification.
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