Six thousand reindeer once lived on a remote island in the Bering Sea
that was briefly their paradise. In what has become a classic story of
wildlife boom and bust, no reindeer live on St. Matthew Island now.
Three scientists just looked back at the St. Matthew's reindeer herd and
found that an extreme winter probably pushed the stressed animals to
their deaths.
Explanation:
Only 10% of calories will be transfered to the next higher level.
5000 * 0.1 = 500.
500 calories will transfer to the secondary consumers.
They use tools to help take precise measurements, carry out experiments, and make observations.