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Biology (B1) > Environmental Change > Flashcards

Flashcards in Environmental Change Deck (15):
1




WHAT EFFECTS DO CHANGES IN THE ENVIRONMENT HAVE

Caused by various factors such as lack of useful food source — may affect the distribution and behaviour of organisms

2




ANIMALS AND PLANTS ARE EXPOSED TO ENVIRONMENTAL CHANGE. WHAT TWO FACTORS CAUSE THIS

LIVING FACTORS — such as change in predator, food source, or competitor

NON LIVING FACTORS — such as change in temperature or rainfall

3




WHAT IS "COMPETITION" IN ANIMALS

Habitats have limited amounts of the resources needed by living organisms. They must compete with other organisms for these resources. If they are unsuccessful and cannot move to another habitat, they will die

4




RESOURCES ANIMALS COMPETE FOR (3)

• food
• water
• space

They might also compete for mates

5




RESOURCES PLANTS COMPETE FOR (4)

Plants make their own food through photosynthesis so they don't compete for that

• light
• water
• space
• mineral salts

6




WHAT IS AN EXTREMOPHILE

An extremophile is an organism that lives in conditions of

• extreme temperature
• extreme acidity
• extreme alkindity
• extreme chemical concentration

7



Name of the extremophile of
EXTREME TEMPERATURE

Hyperthermophile

8



Name of the extremophile of
EXTREME ACIDITY

Acidophile

9




WHAT IS THE MOST COMMON SOURCE OF AIR POLLUTION

Combustion of fossil fuels

• sulfur dioxide is released if the fuel contains sulfur compounds

10




NAME AN INDICATOR OF AIR POLLUTION

• Lichens

– lichens are plants that grow in exposed areas such as rocks or tree bark
– they need rain water which has just enough nutrients to keep them alive
– air pollution dissolves in rain water, especially silver dioxide can damage lichens and prevent them from growing

This makes them good indicators as
• bushy lichens need really clean air
• leafy lichens an survive small amounts of air pollution

11




HOW IS WATER POLLUTION INDICATED

Many aquatic invertebrate animals cannot survive in polluted water, so their presence or absence indicates the extent to which the water is polluted

12




INDICATOR SPECIES FOR CLEAN WATER

Mayfly lava

13




INDICATOR SPECIES FOR LOW LEVELS OF POLLUTION

Freshwater shrimp

14




INDICATOR SPECIES OF HIGH LEVEL WATER POLLUTION

Water louse

15




INDICATOR SPECIES IF VERY HIGH LEVER WATER POLLUTION

Rat-tailed maggot

Sludgeworm