AP®︎ Environmental Science: Topic 8.5 Flashcards

Master key terms and definitions for Topic 8.5 of AP Environmental Science – Eutrophication to help you prep for quizzes and the AP exam.

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Term

Eutrophication

Definition

Enrichment of a body of water with nutrients, often causing an algal bloom followed by decomposition, oxygen depletion, and aquatic die-offs

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Eutrophication
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Enrichment of a body of water with nutrients, often causing an algal bloom followed by decomposition, oxygen depletion, and aquatic die-offs

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Cultural Eutrophication; Anthropogenic Eutrophication
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Human-accelerated eutrophication caused mainly by nutrient-rich agricultural runoff and wastewater releases

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Algal Bloom
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A rapid increase in algae or cyanobacteria, commonly triggered by excess nutrients in water

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Dissolved Oxygen (DO)
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Molecular oxygen dissolved in water and available to aquatic organisms for aerobic respiration

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Hypoxic Waterway
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A body of water with a low concentration of dissolved oxygen

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Anoxic Water
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Water containing essentially no dissolved oxygen

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Dead Zone
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An area where dissolved oxygen is too low to support most oxygen-dependent aquatic animal life

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Eutrophic Waterway
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A nutrient-rich, highly productive waterway that may have dense algae, abundant organic matter, and large dissolved-oxygen fluctuations

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Oligotrophic Waterway
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A waterway with very low nutrient levels, low and stable algal populations, clear water, and high dissolved oxygen

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Harmful Algal Bloom
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An algal or cyanobacterial bloom that produces toxins harmful to wildlife, livestock, pets, or humans

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