Biological Magnification And The Human Impact On The Nitrogen Cycle Flashcards Preview

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Flashcards in Biological Magnification And The Human Impact On The Nitrogen Cycle Deck (12)
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1

Biological magnification

When certain harmful substances like pesticides move up through the food chain

2

Plants are used to thriving with ___ levels of nitrogen

Low

3

When was artificial fertilizers developed why?

Second half of 20th century
Because as population grows we need more food.

4

What's nitrogen overload

When more nitrogen is being added to the environment then it can absorb.

5

What happens to plants with too much nitrogen.

Stop growing because the lack other resources besides nitrogen.

6

What is nitrogen saturation?

When extra nitrogen not absorbed by organisms washes from the soil into water ways.

7

Effects of nitrogen saturation?

Stunted tree growth
Yellow needles
Damaged roots

8

How does nitric acid form in the atmosphere

Smoke stakes release nitrogen containing gases that dissolve in the moisture of the air.

9

What is the only solution to stopping acidified lakes.

Adding limestone which is a base to counteract the acid

10

Eutrophication

The build up of nutrients in an aquatic ecosystem.

11

Algae bloom

Added nitrates initially create a population explosion of algae in the warm surface waters.

12

Insecticide -
Herbicide-
Fungicide-
Bactericide-

Insects
Weeds
Moulds and fungus
Bacteria