ess 4.4
- point source pollution
- pipeline
- effluent into a body of water
- nonpoint source pollution
- sediment: top soil that washes off
- pesticides
- herbicides
- detergents → have phosphates
- plastic bags:
- dont biodegrade
- end up in oceans
- eutriphocation
- addition of excess nutrients to a freshwater ecosystem
- natural process but can be sped up w/ human act.
- nutrients:
- detergents
- fertelizers
- erosion
- process:
- nutrients wash into water source & make algae grow faster
- algae blooms form
- zooplankton & small animals multiply while eating more algae
- algae die → decomposition uses oxygen
- oxygen levels drop → organic sediments
- ways to measure pollution
- direct:
- turbidity
- nitrates
- phosphates
- dissolved oxygen
- temp
- indirect:
- species diversity
- biodiversity
- indicator species
- biological oxygen demand
- dissolved oxygen in water
- if o2 maintains→ not a lot of pollution
- solutions:
- reduce nutrient pollution going into waterways
- regulations
- clean up bodies of water that are eutrophic
- pump out mud
- reintroduce native species