Question

Which of the following does not lead to an increase in phytoplankton reproduction? a. increased nutrient availability b. increased sunlight c. increased oxygen levels d. increased levels of carbon dioxide

Answer 1

d. increased level of carbon dioxide . due to carbon dioxide phytoplankton cannot breath easily .
I hope my answer is right .

Answer 2

Phytoplankton is a microscopic marine algae. They are autotrophs and prepare their own food via photosynthesis. Phytoplankton is a huge source of nutrients for other marine animals.

They need air and sunlight and carbon dioxide to make their food but if the level of carbon dioxide increases high, it becomes difficult for them to respire as they possess plant like traits, so the correct option is D.