What are the types of non random sampling
-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
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.
Habitat Diversity – The range of different habitats and ecosystems in a region.
How do you know based on Simpsons Index if the area has high or low levels of biodiversity
If the number is closer to 1 then there is a high level of biodiversity and if the number is closer to 0 there is a lower level of biodiversity
How do you calculate genetic biodiversity
proportion of polymorphic gene loci =
number of polymorphic gene loci /
total number of loci
How does human population growth affect biodiversity
-We are carrying out deforestation for land, for homes and businesses resources and etc
How is monoculture affecting biodiversity
massive lands are growing 1 type of crop which decreases the habitat biodiversity, decreases species diversity and decreases genetic biodiversity and it causes soil erosion
What is meant by a keystone species
have significant effect on ecosystem✓
many other species rely on activity of them✓
What are felled trees
Trees that have been cutt down and its good to maintain biodiversity as opened up tree canopy allowing light to ground
level
What is a species
organisms that breed to produce fertile offspring
What is species richness
The number of different species in an area
What is species evenness
The number of individuals within each species
What is a habitat
the area where individuals in a species live
Why is biodiverse genetics important
its important to keep the gene pool large so you can withstand disease
What is biodiversity
-The variety of life; variety of ecosystems; variety of genes
How do you measure species richness
Counting the number of species in each area
How do you measure species evenness
Simpsons index
why is randomising important
-to avoid bias
How do you know how many samples to do
- enough to be able to calculate the mean
-avoid recounting the same plant
-sample at different times of the day/ year/month etc
-must be representative of the whole area
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Key Terms (Whole course)10
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Module 1 - Development of Practical Skills Practical Skills17
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Module 2: Section 1 - Cell Structure52
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Module 2: section 1 - Microscopes39
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Module 2: Section 2 - Biological Molecules62
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Module 2: section 3 - Nucleotides And Nucleic Acids40
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Module 2: Section 4 - enzymes43
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Module 2: Section 5- Biological membranes40
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Module 2 Section: 6 - Cell division51
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Module 3: Section 1 - Exchange and Transport54
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Module 3: Section 2 - Transport in Animals74
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Module 3: Section 3 - Transport in plants44
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Module 4: Section 1 - Disease and the Immune System68
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Module 4 : Section 2 - Biodiversity43
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Module 4: Section 3 - Classification and Evolution29
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Module 5: Section 3 - Neuronal Communication47
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Module 5: Section 2 - Excretion35
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Module 5: Section 5 - Plant and Animal Responses and Hormones43
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Module 5: Section 6 - Photosynthesis19
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Module 5: Section 6 - Respiration23
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Module 6: Section 1 - Cellular Control50
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Module 6: Section 2 - Patterns and Inheritance38
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Module 6: Section 4 - Manipulating Genomes20
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Module 6: Section 5 - Cloning and Biotechnology42
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Module 6 : Section 6 - Ecosystems42
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Module 6: Section 7 - Populations and Sustainability0
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Module 5: section 1 - Homeostasis and communication17
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Module 5: section 4 - Hormonal communication23
