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Pollution of
Waterways - Coggle Diagram
Pollution of
Waterways
Organic Pollution
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- organic pollutants enter waterways
- provide rich source nutrients
- bacteria involved decay
- population explosion of
saprobiotic bacteria
- use up too much oxygen in water
- due aerobic respiration
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Biological Oxygen
Demand
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examples:
- pure silage effluent = high
- pure milk = even higher
effect high BOD on waterways
- high BOD - kills fish + invertebrates
some species adapted to live in water with high BOD
INDICATOR SPECIES
(presence give info about water quality)
Eutrophication
D: gradual, longer term nutrient
enrichment of waterways (nitrates + phosphate)
- fertiliser run-off increases nitrate + phosphate level in waterways
- high N + Ph level = aquatic plants + algae grow much faster
large increase algal growth = algal bloom
- large number...
- block light + shade plants lower in water
- lead to N + Ph depletion as use up all nutrients
- aquatic plants + algae die (shortage light/nutrients)
bodies decomposed by saprobiotic bacteria
- many of decomposer are aerobic +
use up oxygen in water = aerobic respiration
- fish and other animals die due
to lack of oxygen
shortage oxygen = loss in biodiversity
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