C - Competition, environmental change and how to measure it Flashcards
Organisms compete for _______ to survive
Resources
Plants need … from the soil (4) name 2
Light
Space
Water
Minerals (nutrients)
Animals need … to survive (4) name 2
Space (territory)
Food
Water
Mates
Organisms compete with _________ or __________ for the same _________
Other species and there own species for the same resources
Why is there competition between red and grey squirrels?
Because they live in the same conditions and eat the same food! The red squirrel population is decreasing!
Environmental changes are caused by _____ factors and _________ factors
Living factors
Non-living factors
Name 2 environmental living FACTORS that can affect species (4)
- A Change in the occurrence of infectious diseases
- A change in the number of predators
- A change in the number of prey or food sources
- A change in the number of types of competitors
Name 2 environmental non-living FACTORS that can affect species (3) - to do with climate more!!
- A change in average temperature
- A change in average rainfall
- A change in the level of air or water pollution
Name the 3 ways that environmental changes can affect populations…
- Size increases
- Size decreases
- Distribution changes
Is it difficult or easy to measure accurately just how much our environment is changing?
Very difficult
How can environmental changes be MEASURED? (2) e.g?
Living indicators- e.g. Plants
Non living indicators- e.g. Technology
How does lichen show how polluted an area is?
It’s sensitive to the amount of SULFUR DIOXIDE in the atmosphere. If there’s more, greener lichen, the air will be cleaner and less polluted
What’s the plant that indicates the pollution in the atmosphere?
Lichen
What is the insect that can detect how clean the water is?
Mayfly larvae
How does a mayfly larvae detect how clean the water is?
They are sensitive to the amount of DISSOLVED OXYGEN in the water, if you find a mayfly larvae in the water, it indicates that the water is clean
