In the ecosystem of the northern seas and coastal areas, many plants, animals and microorganisms live and interact. Consider a group that includes polar bears, herring, phyto- and zooplankton, seals, and cod. How will the decline in phyto- and zooplankton numbers affect the polar bear population?
1. answer to the question: the number of polar bears will decrease;
2. explanation, for example: the number of all the listed animals located in the food chain before the polar bear will decrease.
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