3.1.2.3.4 Habitat conservation: Abiotic/Biotic Factors Flashcards
1
Q
Abiotic factors
A
- water
- temperature
- light levels
- ph
- mineral nutrients
2
Q
Water
A
- allows birds and mammals to drink
- amphibians to breed
3
Q
pH
A
- plants that can survive acidic conditions benefit as they have few competitors
- low pH can inhibit the production of exoskeletons in crustaceans
4
Q
Temperature
A
- warm temperatures needed for development of eggs of many species
5
Q
Light levels
A
- light is essential for photosynthesis
- creating clearings provides suitable conditions for plants that need higher light levels
6
Q
mineral nutrients
A
- some plants can live in nutrient-deficient soils
- creating suitable habitats involves removing fertile topsoil/not adding fertilisers
7
Q
Biotic factors
A
- control of pathogens
- control of predation
- control of competitors
- pollination
- seed dispersal
- food
8
Q
Food (biotic factor)
A
- providing suitable conditions for its food species will increase the survival of an animal species
- e.g wildflower grasslands support seed-eating birds
9
Q
Control of predation (biotic factor)
A
- can be done by excluding, trapping and removing, or culling
- e.g providing island breeding sites for nesting water birds
10
Q
Control of competitors (biotic factor)
A
- removing invasive rhododendron bushes stops wildflowers being outcompeted for light
11
Q
Seed dispersal (biotic factor)
A
- plants need some animals for their seed dispersal
- e.g forest elephants
12
Q
Pollination (biotic factor)
A
- insects transport pollen between flowers
- a range of plants with different flowering times are needed so insects have food available through all seasons
13
Q
Pathogens (biotic factor)
A
- introduced diseases can wipe out native populations with no resistance
