eutrophication Flashcards
1
Q
what do fertilisers do
A
add nutrients to soil nitrates into plants to make proteins grow more bigger leaves more photosyn can be either natural e.g animal waste or artificial
2
Q
compare artificial and natural fertilisers
A
natural- cheaper less soluble so less leaching but smelly
artificial - more concentrated so less needed but expensive and more soluble
3
Q
what is leaching
A
when nutrients removed from soil dissolve into water washed into rivers leads to eutrophication.
4
Q
describe the process of eutrohication
A
increase in nitrate causes algal bloom
algae blocks sunlight causes lower underwater plants to die
saprophytes lead to breakdown of dead plants material
saprophytes use up oxygen in resp
fish die due to lack of oxygen needed to respire
