eutrophication Flashcards

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1
Q

what are the two types of firtiliserd

A

artificial and natural

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2
Q

give an example of an artificial firterliser

A

NPK

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3
Q

what is eutrophication

A

excess richness of minerals in a body of water

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4
Q

what is the main cause of eutrophication

A

leaching

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5
Q

what is leaching

A

where firterlisers from plant soil leak into rivers and streams

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6
Q

what does this influx of chemicals into water cause

A

nitrate levels to rapidly increase

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7
Q

what does a rapid increase of nitrate cause

A

rapid growth of alege

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8
Q

what is bad about rapid algae growth

A

the algea bloom on water surface absorbing all the sun light

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9
Q

what does this absorbtion of sunlight mean

A

plants bellow cannot photosynthesise

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10
Q

what does this then lead the plants to do

A

die

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11
Q

what does the death of plants mean for bacteria

A

increased food supplie

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12
Q

what does this increased food supply mean

A

rapid replication

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13
Q

if there are lots of bacteria what do they use up

A

co2

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14
Q

what does lotys of bacteria being present mean for the other organisms

A

bacteria cause a rapid growth in co2 which overpowers o2 meaning o2 levels fall

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15
Q

what does the falling of o2 levels mean

A

aquatic animals suffocate and die

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16
Q

what do the fish dying lead to

A

more fish decay

17
Q

what does the increased fish decay lead to

A

more nitrate

18
Q

what does the increased nitrate lead to

A

toxic waste