Biological Magnification And The Human Impact On The Nitrogen Cycle Flashcards
Biological magnification
When certain harmful substances like pesticides move up through the food chain
Plants are used to thriving with ___ levels of nitrogen
Low
When was artificial fertilizers developed why?
Second half of 20th century
Because as population grows we need more food.
What’s nitrogen overload
When more nitrogen is being added to the environment then it can absorb.
What happens to plants with too much nitrogen.
Stop growing because the lack other resources besides nitrogen.
What is nitrogen saturation?
When extra nitrogen not absorbed by organisms washes from the soil into water ways.
Effects of nitrogen saturation?
Stunted tree growth
Yellow needles
Damaged roots
How does nitric acid form in the atmosphere
Smoke stakes release nitrogen containing gases that dissolve in the moisture of the air.
What is the only solution to stopping acidified lakes.
Adding limestone which is a base to counteract the acid
Eutrophication
The build up of nutrients in an aquatic ecosystem.
Algae bloom
Added nitrates initially create a population explosion of algae in the warm surface waters.
Insecticide -
Herbicide-
Fungicide-
Bactericide-
Insects
Weeds
Moulds and fungus
Bacteria
