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23 Cards in this Set
- Front
- Back
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What is biodiversity? |
A measure of the variation found in the living world |
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What is a habitat? |
Where an organism lives |
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What is a species? |
A group of organisms that can freely interbreed to produce fertile offspring |
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What is an allele? |
A version of a gene |
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What is a locus? |
The position of that gene on a chromosome |
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What is a polymorphic gene locus? |
A locus that has more than two alleles |
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What is Simpson's index of biodiversity? |
A measure of the diversity of a habitat |
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What is species evenness? |
A measure of how evenly represented the species are |
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What is species richness? |
A measure of how many different species are present |
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What is climate change? |
Significant long-lasting changes in weather patterns |
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What is a monoculture? |
A crop consisting of one strain of one species |
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What is a keystone species? |
One that has a disproortionate effect upon its environment relative to its abundance |
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What is soil depletion? |
The loss of soil fertility caused by removal of mineral by continuous cropping |
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What is conservation in situ? |
Carrying out active management to maintain the biodiversity in the natural environment |
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What are marine conservation zones? |
Areas of the sea set aside to conserve the diversity of species and habitats |
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What are wildlife reserves? |
Areas set aside for the conservation of species or habitats |
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What is conservation ex situ? |
Conservation outside the normal habitat of the species |
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What is CITES? |
The Convention on International Trade in Endangered Species |
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What is the countryside stewardship scheme? |
A scheme to encourage farmers and other landowners to manage parts of their land in a way that promotes conservation |
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What are the advantages and disadvantages of random sampling? |
-Ensures data is not biased -May not cover all areas of habitat equally, underestimate of biodiversity |
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What are the advantages and disadvantages of non-random opportunistic sampling? |
-Easier/quicker than random -Data may be biased, overestimate of biodiversity |
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What are the advantages and disadvantages of non-random stratified sampling? |
-Ensures all different areas are sampled and that species aren't under-represented -Could lead to over-representation |
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What are the advantages and disadvantages of non-random systematic sampling? |
-Useful when habitat shows clear gradient in environmental factors -Only species on/within line can be recorded, some may be missed |
