Eutrophication/fertilisers A2 Flashcards
1
Q
why use fertilisers
A
add nutrients to the soil
2
Q
how to nitrates lead to more photosynthesis
A
nitrates plants make more protein for growth bigger leaves more photosynthesis
3
Q
define leaching
A
nutrients removed from coil dissolve into water washed rivers
leads to eutrophication
4
Q
the different types of fertilisers
A
natural and artificial
5
Q
pros and cons of natural fertilisers
A
cheaper, less soluble so less leaching but smelly
6
Q
pros and cons of artificial fertiliser
A
more concentrated so less needed but more expensive more soluble
7
Q
process of eutrophication
A
increase in nitrate causes algal bloom
algae block light to lower plants
lower plants die
saprobionts break down dead plant material
saprobionts use up oxygen in respiration and increase BOD
fish die due to lack of oxygen
