pollution survery

Eutrophication

Over enrichment with nutrients in a body of water

1. Algal bloom

2. BOD + deoxygenation

3. Spike in decomposers

4. Turbidity and reduction of O2

Biomagnification

When pollutant concentrations get higher at each tropic level

How does biomagnification of DDT harm bird population

1. DDT enters the ecosystem; runoff from fields into water

2. Small organisms like fish absorb it

3. Then larger fish consume the smaller fish

4. Because DDT doesn’t break down easily, birds eat the larger fish with the DDT in it

How can macro and microplastics affect aquatic ecosystems (8)

1. Enter aquatic ecosystems through litter, runoff, wastewater

2. Can mistake plastic for food, leading to choking, internal injuries, or starvation

3. Larger waste can entangle animals

4. Microplastics can be eaten by small aquatic organisms

5. Microplastics biomagnify through food webs

6. Plastic pollution can damage habitats

7. Plastics can carry harmful chemicals

8. Reduce biodiversity and disrupt ecosystem balance

How has human activity increase the amount of CO2 in atmosphere over natural levels (4)

1. Burning fossil fuels

2. Deforestation

3. Transportation

4. Industrial processes