In a hydrosere, phytoplankton stage is dominated by diatoms*1 pointTrueFalse

In a hydrosere, water level is reduced, nitrates and sulphates are formed, plants like Carex and animals like snails are common. Identify the stage.*1 pointReed swamp stageRooted floating stagePhytoplankton stageSedge-meadow stage

Describe the effect of a phytoplankton bloom on the food web

Why are phytoplankton critical to life on Earth?Question 30Select one or more:they produce 50% of the O2they produce more CO2 than they take inthey are important herbivoresthey are the base of the marine food web

Why are phytoplankton a key part of the marine ecosystem?Multiple choice question.They provide the needed salts to form saltwater.They form the base of the marine food web.They remove the 18O isotope from seawater allowing marine animals to flourish.They shield deep water organisms from harmful UV radiation.

The process by which nutrients trigger the rapid growth of algae, ultimately leading to O2-depleted water, is calledMultiple choice question.the greenhouse effect.eutrophicationbiomagnification.desalinization.