Chapter 19: Problem 9

How can a shift in environmental \(\mathrm{pH}\) affect aquatic ecosystems? What protects these ecosystems in some regions?

Short Answer

Expert verified

A shift in environmental pH can significantly affect aquatic ecosystems by disrupting the balance of life, causing harm to aquatic organisms or promoting excessive growth of certain life forms like algae. Some regions, primarily those rich in limestone, have a natural buffering capacity that helps in maintaining a stable pH and thereby offers protection to the aquatic ecosystem.

Step by step solution

Understanding pH

pH is a scale that measures the acidity or alkalinity of a solution. In environmental science, this is crucial as it can directly affect an ecosystem's biodiversity and health. The pH scale ranges from 0 to 14, where solutions with a pH less than 7 are acidic, those with a pH greater than 7 are basic, and a pH of 7 is neutral.

pH impact on Aquatic ecosystems

A shift in environmental pH can have dramatic effects on aquatic ecosystems. The most favorable pH for most aquatic life is between 6.5 and 9. Changes outside this range can cause harmful effects. If the pH is too low (acidic), it can leach heavy metals such as lead and copper from sediments and these toxic metals can harm aquatic life. Similarly, a high pH can cause a bloom of algae which can disrupt the balance of the ecosystem.

Protection Mechanisms

Certain regions, mainly ones rich in limestone, are more capable of buffering against pH changes. Limestone (calcium carbonate) dissolved in the water can neutralize acid, maintaining a more stable and livable pH for organisms. This sort of natural buffering capacity is what protects aquatic ecosystems in these regions.

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How can a shift in environmental \(\mathrm{pH}\) affect aquatic ecosystems? What protects these ecosystems in some regions?

Short Answer

Step by step solution

Understanding pH

pH impact on Aquatic ecosystems

Protection Mechanisms

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