Biodiversity Flashcards
What is biodiversity
Measure of all the different species worldwide, the genes they contain and the ecosystems why they form
What is habitat biodiversity
The range of habitats in which different species live
What is species biodiversity
The range of organisms found in a habitat
What is genetic biodiversity
Variation between individuals belonging in the same species
What is a habitat
Place where a species lives
What is a species richness
Number of species in an area at a given time
What is species evenness
Relative abundance of each species
What is random sampling
Sample sites are randomly selected
What are the advantages and disadvantages of random sampling
Advantage- no biased data
Disadvantage- may underestimate biodiversity by missing out some animals
What is opportunistic sampling
Sampling places based on prior knowledge of the area
What are the advantages and disadvantages of opportunistic sampling
Advantages- easier and quicker
Disadvantage- biased sampling, may overestimate biodiversity by including large animas
What is systematic sampling
Species are sampled using belt or line transects so samples are taken at fixed intervals across the habitat
What are the advantages and disadvantages of systematic sampling
Advantages- shows a clear gradient in some environmental factor
Disadvantage- only species in that line or belt are sampled, could underestimate the line
What is stratified sampling
Dividing a habitat into areas which appear different and sample each separately
What are the advantages and disadvantages of stratified sampling
Advantages- Ensures all different habitats are sampled, species aren’t underrepresented due to the possibility that random sampling masses certain areas
Disadvantage - possibility of over representation of some areas in the sample
