Ecosystems and Biodiversity

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Watershed

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An area of land that drains water to a common point, such as a river, lake, or ocean.

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Hypoxia

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Low oxygen levels in water, often due to nutrient pollution leading to eutrophication.

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Dead Zones

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Areas in water bodies with insufficient oxygen to support most life.

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Homeostasis

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A system’s ability to maintain stable internal conditions.

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Equilibrium

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A stable state in which opposing forces or processes are balanced.

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Primary Productivity

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The rate at which plants and other producers create biomass through photosynthesis.

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Estuary

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A water body where freshwater from rivers mixes with saltwater from the sea.

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Reservoir

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A natural or artificial storage location for nutrients, water, or energy.

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Source

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A system that releases more of a substance than it absorbs.

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Sink

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A system that absorbs more of a substance than it releases.