PLEASE HELP!! Phytoplankton are one of the most important parts of the food web in the Hudson river. what evidence supports the conclusion? A) The population of phytoplankton dropped sharply soon after zebra mussels invaded the river. B) The decrease in phytoplankton caused a decrease in the river's zooplankton, fish, and native mussel populations. C) The decrease in phytoplankton meant that the river's turbidity, or cloudiness decreased. D) Zebra mussels caused oxygen levels in the river to drop, partly by removing the phytoplankton that produce oxygen.

the answer is b because if there is no phytoplankton then there will be no fish and if you take out one part of the food chain then the whole chain comes apart. So meaning if there is no phytoplankton, then there is no fish, if there isn't any fish, then the other animals that come to eat at the river will eventually starve to death or move somewhere else to get more food.

pstnonsonjoku pstnonsonjoku · Answer 2 · 2021-10-21T19:53:10+02:00

The statement that supports the fact that phytoplankton are one of the most important parts of the food web in the Hudson river is; "the decrease in phytoplankton caused a decrease in the river's zooplankton, fish, and native mussel populations."

Phytoplankton refers to the microscopic and photosynthetic organisms found in water bodies. They are able to trap energy directly from the sun to produce their own food by photosynthesis.

If this primary productivity is hampered in the food web in the Hudson river, there will be nothing for the small fishes to and other native populations to eat and their population will begin to decrease.

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