Populations- factors and definitions
- Created by: Gemma
- Created on: 08-02-14 11:45
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- Populations- factors and definitions
- Definitions
- Population
- All of the organisms of one species in the same habitat
- Habitat
- The area in which an organism lives
- Community
- Populations of different species in a habitat
- Ecosystem
- All of the organisms living in a particular area and the abiotic (nonliving) condisiotns
- Niche
- the role of a species within its habitat
- Biotic factors
- A factor created by a living thing or component within an environment
- in which the action of that organism affects the life of another
- A factor created by a living thing or component within an environment
- Abiotic factor
- A non-living factor in the environment
- Competition
- A relationship between different organisms requiring the same resources
- One organism can outcompete another
- One organism can outcompete another
- A relationship between different organisms requiring the same resources
- Intraspecific competition
- Competition between individuals of the SAME species
- Example- nettles competing for light or water
- Competition between individuals of the SAME species
- Interspecific competition
- Competition between members of DIFFERENT speices
- oak tree and nettles competing for light
- Competition between members of DIFFERENT speices
- sowing density
- to make a profit crop farmers need to sow the right number of seeds per unit areas
- Population
- The effect of abiotic factors
- Different conditions suit different species
- for example nettles grow well in high conc of phosphate ions
- examples: temp, light, humidity, windspeed
- oxygen conc, soil moisture content, PH, soil type, light intensity
- oxygen conc, soil moisture content, PH, soil type, light intensity
- the non-living part of the environment
- Different conditions suit different species
- The effect of biotic factors
- the living part of the environment
- example the feeding by ladybirds on aphids
- Resources frequently competed for
- Plants
- Mineral ions
- available in the soil, often in short supply
- competition for these can limit plant growth
- Water
- plants take up a large amount in transpiration
- usually in shirt supply in many ecosystems
- light
- essential for photosynthesis
- Space
- a major issue as plants are unable to move to other areas
- Mineral ions
- Animals
- Food- the most frequent
- Space- mainly an issue for those with limited movement eg barnacles
- Breeding-between same species for mates and breeding sites
- Plants
- Definitions
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