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B7 (Food Chain, Biodiversity, Ecological Terms, Factors Affecting…
B7
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Biodiversity
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Biodiversity - The variety of different species on Earth, or within an ecosystem
Ecological Terms
- Population - All the organisms of one species living in a habitat
- Community - The populations of different species living in a habitat
- Stable Community - A community in which all species and environment factors are in balance, so the population sizes are roughly constant.
- Ecosystem - The interaction of a community of organisms and the parts of their environment that are non-living.
- Adaptation - A feature that enables an organism to survive in the conditions of its normal habitat.
- Independence - Each species in a community depending upon other species for things. E.G. Pollination, Food, Shelter
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Adaptations
- Structural - e.g. A white winter coat helps camouflage against the snow
- Behavioural - e.g. Some birds migrate to warmer climates during the winter
- Functional - e.g. Some animals lower their metabolism and hibernate over winter
Water Cycle
- Evaporation
- Condensation
- Transpiration
- Precipitation
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Global Warming
- Rising Sea Levels
- A Change in Distribution
- A Decrease in Biodiversity
Pollution
- Sewage, fertilisers and toxic chemicals from farming
- Smoke released by factories and acidic gasses released
- Toxic chemicals and waste dumped in landfill
Protecting Ecosystems
- Breading programmes
- Habitat restoration
- Hedgerows and field margins
- Government regulations
- Recycling