During eutrophication, what happens to dissolved oxygen (O2) levels as biochemical oxygen demand (BOD) increases?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the JMSS Science Test with engaging content. Revise with flashcards and diverse questions, each with insightful hints and explanations. Ace your exam with confidence!

Multiple Choice

During eutrophication, what happens to dissolved oxygen (O2) levels as biochemical oxygen demand (BOD) increases?

Explanation:
During eutrophication, nutrients fuel algal blooms and more organic material in the water. Biochemical oxygen demand (BOD) is a measure of how much oxygen microorganisms need to decompose that organic matter. As BOD rises, these microbes consume more dissolved oxygen through respiration, so the available oxygen in the water drops. This leads to lower dissolved oxygen levels, which can stress or kill aquatic life. Keep in mind that daytime photosynthesis by algae can temporarily raise oxygen, but the overall effect of higher BOD is a decline in O2.

During eutrophication, nutrients fuel algal blooms and more organic material in the water. Biochemical oxygen demand (BOD) is a measure of how much oxygen microorganisms need to decompose that organic matter. As BOD rises, these microbes consume more dissolved oxygen through respiration, so the available oxygen in the water drops. This leads to lower dissolved oxygen levels, which can stress or kill aquatic life. Keep in mind that daytime photosynthesis by algae can temporarily raise oxygen, but the overall effect of higher BOD is a decline in O2.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy