This document discusses food chains in nature. It explains that plants like phytoplankton and algae are producers at the start of the food chain, obtaining energy through photosynthesis. Zooplankton and other organisms then consume the plants as primary consumers. Secondary consumers feed on the primary consumers, and in some ecosystems there are tertiary consumers that feed on both. Decomposer bacteria break down dead organisms, recycling nutrients. Each link in the food chain is important for the survival of the whole chain.
According to the Species at Risk Act, there are 516 endangered species in Canada. Several species highlighted in the document are struggling due to habitat loss from activities like logging, urban development, and pollution. The woodland caribou population has declined from over 44,000 to decreasing numbers due to forest destruction. The golden eagle, killer whale, barn owl, and spotted turtle are also endangered or threatened species facing dwindling populations and habitat loss from human activities.