This sections part of habitats off from others
Small changes can have large effects on a habitat
Many plants are very sensitive to change in temperature and small changes can be deadly
Limits the ability of animals to get from place to place
Animals living in and environment need it to stay the same or change very slowly to adapt
This than effects the overall health of the ecosystem
Animals need O2 to survive
Changing an important feature of the habitat
Contributing even more to the sectioning off of the water

Hydroelectric dams

Manufacturing and materials

Concrete is often used in making dams, its main materials is gravel collected from gravel pits.

Fossil fuels are burned when transporting and building the dams. Ex a cement mixer.

animals

The dams prevent fish from reaching their breeding grounds, interrupting the food chain.

Contributes to significant loss of aquatic biodiversity.

Habitat is changed drastically in unreversible ways.

Plants

Can flood forests causing a loss of a major carbon sink.

Change water quality can kill the plants living there.

Water

Over all O2 levels go down, With in the large body of water and further down stream.

Controls when the water flows

Water tempter can be altered

Greenhouse gases

Dam reservoirs create Greenhouse gases from microbial process that decompose organic , but in some cases they can act as carbon sinks.

Additional info

Land the dam is built on

More dry land is created as parts of the body of water are sectioned off by the dam.