food chain & food web
The energy source of the taiga food web are the black spruce trees. The trees feed the first animals in the food chain which lead to all the other animals. Fluctuations in the number of each organism could affect the other organisms because each organism depends on their prey, or another animal in the web, to survive. Some factors that may limit population growth might be food resources, oxygen and water availability, amount of space there is. Also, competition and predation may limit population growth. An invasive species, such as the non-native insects known as the bark beetle can infest trees, such as spruce. Millions of these insects bore into the bark of trees, laying eggs. The infested trees die. Bark beetle infestations can kill entire forests and thousands of hectares of taiga.