Watersheds & Eutrophication

What do watersheds consist of?

• Rivers and lakes

• Mountains and valleys

• Forests and wetlands

• Deserts and plains

What impact can human activities have on watersheds?

• Increase the flow of water in the watershed

• Decrease the amount of pollution in the watershed

• Cause significant damage to the ecosystem of the watershed

• Create new habitats for aquatic life in the watershed

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Understanding and protecting watersheds is crucial for the sustainability of ___ resources.

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What is a watershed?

• An area of land where all the water drains into a common outlet

• A type of bird found in wetlands

• A method of irrigation used in arid regions

• A type of rock formation found in caves

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A _________ is an area of land where all the water, such as rain, snowmelt, and runoff, drains into a common outlet, such as a river, lake, or ocean.

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It is like a natural basin that collects and channels water from higher elevations to lower elevations. Watersheds come in all ______ ___ ____, ranging from small ones that cover a few acres to large ones that span thousands of square miles

• shapes and sizes

• natural basins

• elevations

• lower elevations

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What are freshwater lakes particularly vulnerable to?

• Pollution

• Overfishing

• Eutrophication

• Acidification

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The excessive growth of algae can also result in harmful algal blooms, which produce toxins that can be harmful to humans and ___.

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What is eutrophication?

• A process that occurs when a body of water becomes overly enriched with nutrients, leading to excessive growth of algae and other aquatic plants.

• A process that occurs when a body of water becomes depleted of nutrients, leading to a decrease in aquatic plant growth.

• A process that occurs when a body of water becomes overly polluted with chemicals, leading to the death of aquatic organisms.

• A process that occurs when a body of water becomes overly acidic, leading to the destruction of aquatic ecosystems.

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What human activities contribute to eutrophication?

• Deforestation, mining, and oil drilling

• Fishing, hunting, and trapping

• Agriculture, urbanization, and industrialization

• Tourism, sports, and recreation

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NGSS.MS-ESS3-3

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