dissolved or suspenced solids and organic waste
all bay animals need different amounts of dissolved oxygen.when water moves acrossed their gills
it puts do in their blood annd so when theres not enough oxygen in the water its harder for the animals to breath.
The higher amount of salt means the lower amount of do.Tap water has less salt then other oceans.So they have more Do.Water can get more salt by runoff from cars.
Oxygen is mostly used up when things die ,and bacteria decomposes them.Nutrients are also algea food.Do concentrates can drop too low that fish cant breath.Nutrients can also help plants grow.
Organic waste means
a dead animals body.Bacteria decomposes organic
waste ,Bacteria takes away oxygen from water when it breaths.So if theres
a lot of organic waste in the water Bacteria will eat it then grow and use
up a lot more oxygen.
Do
is a big part in healt for under water organism.Most waters needabout 5-6
ppm to keep a good population.
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