Module 4 : Section 2 - Biodiversity Flashcards
What is biodiversity
The variety of living organisms in an area
What is a species
a group of similar organisms able to reproduce to give fertile offspring
What is species diversity
the number of different species and the abundance of each species in an area
What is a habitat
the area inhabited by a species
Areas with lots of different species have high or low biodiversity
high
What is habitat diversity
the number of different habitats in an area
What is species richness
the number of different species in a habitat or community
What is genetic diversity
the variation of alleles within a species
What is species evenness
the number of individuals of each species
What are the types of non random samples
-Systematic
-Opportunistic
-Stratified
What is systematic sampling
This is when samples are taken at fixed intervals, often along a line
What is Opportunistic sampling
this is where the sample is chosen by the investigator as its simple to carry out
What is stratified sampling
This is when different areas in a habitat are identified and sampled separately in proportion to their part of the habitat as a whole
How is biodiversity measured
Using Simpsons index of diversity
What does the lower case n in Simpsons Index of diversity mean
total number of organisms in one given species present
What does the capital N in Simpsons Index of diversity mean
total number of organisms of all species
What are the factors that affect biodiversity
-Human population growth
-Increased use of monoculture in agriculture
-climate change
What are the three types of biodiversity?
Species Diversity – The number and variety of species in a habitat.
Genetic Diversity – The variation in genes within a species.
Ecosystem Diversity – The range of different habitats and ecosystems in a region.
