A healthy ecosystem is intact in its physical, chemical, and biological components.
It is not experiencing the abnormal growth or decline of native species, the concentration of persistent contaminants, or drastic anthropogenic changes to its landscape or ecological processes.
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MPAs are "any area of intertidal or subtidal terrain, together with its overlying water and associated flora, fauna, historical and cultural features, which has been reserved by law or other effective means to protect part of all of the enclosed environment" (IUCN).
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Introduced species are species that are not historically native to an ecosystem.
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Species of concern are native wildlife and plants that require special attention to ensure their conservation.
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