Topic 4 - Biodiversity Flashcards
What is biodiversity?
The variety of living organisms in a particular area.
What is species diversity?
The number of different species and the number of individuals within each species in a community.
What is genetic diversity?
The variety of genetic information within a species, reflecting the number of different alleles in the gene pool.
What is ecosystem diversity?
The range of different habitats within a particular area or ecosystem.
What is three things affect biodiversity?
Deforestation
Agricultural practices
Urbanisation
How can species richness be measured?
Random sampling:
- divide the area into a grid or use a transect
- use a quadrant or sampling frame to randomly sample different locations
- record the species found within each sample
What are the factors affecting species richness?
- Habitat size
- Environmental stability
- Human activity
- Invasive species
