Fresh water food web
The producer is the sun.The primary consumer is the bacteria,grass,leaves,moss,flowers,and underwater plants.The secondary consumers are the ones that eat the primary consumers which are the roundworm,slug,snail,butterfly,frog,lizard,and the snake.The tertiary consumers the ones that eat the secondary consumers which is the Downey wood pecker.
Ways humans are impacting the environment.
Ways humans are impacting a fresh water ecosystem positivly and negatively.Building dams help humans ,but not the ecosystem because some of the animals that live there need the flow of water to live and building dams limits the flow of water.then some people have a positive impact on an ecosystem some people help the ecosystem by using less water and not littering which those kind of people help an ecosystem stay full with water and help the water not be polluted.
Three organisms and the role they play in a fresh water ecosystem
The role they play in a fresh water ecosystem is a secondary consumer.