Relationships Of Organisms With One Another And With The Environment: Ecosystems And Biodiversity
19.3 Ecosystems And Biodiversity
Key Definitions
- Population: Group of organisms of one species in the same area at the same time.
- Community: All the populations of different species in an ecosystem.
- Ecosystem: Community of organisms + environment interacting together.
- Biodiversity: Number of different species living in an area.
Factors Affecting Population Growth
- Food supply.
- Competition.
- Predation.
- Disease.
Written And Compiled By Sir Hunain Zia, World Record Holder With 154 Total A Grades, 7 Distinctions And 11 World Records For Educate A Change O Level And IGCSE Biology Full Scale Course
Human Impact On Biodiversity
- Human population growth increases demand for resources.
- Causes deforestation, pollution, and overharvesting.
- Leads to loss of biodiversity and extinction of species.
Importance Of Biodiversity
- Maintains ecosystem stability.
- Provides food, raw materials, medicines.
- Ensures survival of species through genetic variation.
Key Points To Remember
- Higher biodiversity = healthier, more stable ecosystem.
- Conservation protects biodiversity.
Written And Compiled By Sir Hunain Zia, World Record Holder With 154 Total A Grades, 7 Distinctions And 11 World Records For Educate A Change O Level And IGCSE Biology Full Scale Course