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