Life in Aquatic Ecosystems

Organisms living in aquatic ecosystems are dependent on the resources of their environment. Biological communities—including the types of animals present and their relative abundance—are also shaped through the interactions with other organisms. This section explores in greater detail the relationships between living organisms and the relationship of living creatures with their environment:

• The Building Blocks of Life
• Energy and Food
• Food Chains and Food Webs
• Biomass and Production