4.3 Ecosystems

The plants would have fewer nutrients.

There would be an increase in the number of birds

The tigers would have more to eat.

There would be fewer mushrooms

The decomposers eat the plants to get energy.

The decomposers make food using energy from the sun

The decomposers provide nutrients for the atmosphere.

They decomposers break down dead organisms.

The sun is needed to make the seasons on Earth.

The sun keeps everything warm on Earth.

The sun allows plants and animals to be part of the same ecosystem.

The sun provides the energy for the production of food in the ecosystem.

they make their own food

they eat other organisms

they make things other than food

they obtain food by breaking down the remains of other living things

they make their own food

they eat other organisms

they make things other than food

they obtain food by breaking down the remains of other living things

planting new forests

recycling paper and plastic

protecting endangered species

All of the above

more water is used causing draughts and affecting habitats

more fossil fuels are burned

habitats are destroyed because more space is needed

All of the above

Decomposers

Producers

Consumers

Herbivores

the squirrel would have fewer places to use as shelter

the squirrel would have more space to move around

the squirrel would face more exposure to predators

the squirrel would have less resources to use as food

Grass

Frog

Snake

Mosquito