T7 adaptations, interdependence and competition Flashcards Preview

aqa gcse biology free > T7 adaptations, interdependence and competition > Flashcards

Flashcards in T7 adaptations, interdependence and competition Deck (24)
Loading flashcards...
1
Q

state the levels of organisation in an ecosystem

A

individual, population, community, ecosystem

2
Q

what is an ecosystem

A

interaction between the living components and non-living components

3
Q

state the factors that plants may compete for

A

light
space
water
mineral ions from soil

4
Q

factors that animals may compete for

A

food
mates
territory

5
Q

what is intraspecific competition

A

competition within a species

6
Q

what is interspecific competition

A

competition between different species

7
Q

what is interdependence

A

different species in an ecosystem depend on each other for various resources, if 1 species is removed, the whole community may be affected

8
Q

what is a stable community

A

community in which all the biotic factors and all abiotic factors are balanced so that population sizes remain relatively constant

9
Q

what are abiotic factors

A

non-living factors

10
Q

abiotic factors that may affect an ecosystem

A

light intensity, temperature, moisture, soil pH and mineral content, O2 level, CO2 level, wind intensity and direction

11
Q

why might light intensity affect an ecosystem

A

different species of plants may have different optimum light intensities for growth

12
Q

why does temperature affect an ecosystem

A

different species of plants and animals may have different optimum temperatures for growth and survival

13
Q

how does soil pH affect an ecosystem

A

certain plants may grow better in either alkaline or acidic soil

soil pH may affect the appearance of the plant

14
Q

how does moisture level affect an ecosystem

A

many plants can’t survive in waterlogged soil as their roots can’t respire

certain plants are adapted to high moisture levels

15
Q

how does wind intensity affect an ecosystem

A

plant seeds are more likely to germinate in locations with lower WI which may also attract animals that depend on the plant to live nearby

16
Q

how does soil mineral content affect an ecosystem

A

most plants require a high level of soil minerals to grow well

17
Q

example of a type of plants that have adapted to low soil mineral content

A

carnivorous plants catch insects to compensate for the low level of soil mineral content

18
Q

how does carbon dioxide concentration affect an ecosystem

A

higher CO2 concentration leads to more plant growth

19
Q

how does oxygen concentration affect an ecosystem

A

aquatic animals cannot survive in areas with low oxygen concentration

20
Q

state the biotic factors that may affect an ecosystem

A

food
new predators
new pathogens
competition

21
Q

what are adaptations

A

features that enable organisms to survive in their living environment

22
Q

organisms living in extreme environments called

A

extremophiles

23
Q

3 examples of extreme living conditions

A

high temperature
high pressure
high salt concentration

24
Q

example of where extremophile bacteria can be found

A

in deep sea vents