Back to AI Flashcard MakerBiology /LGS A-Level OCR Biology - Unit 4 - Biodiversity Part 5
Define invasive species
An organism that is not native to an area and has negative effects on the economy, environment, or health
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Key Terms
Term
Definition
Define invasive species
An organism that is not native to an area and has negative effects on the economy, environment, or health
Describe the role of marine conservation zones in maintaining biodiversity
vital in protecting species rich areas e.g. coral reefs
doesn't prevent fisherman in the area
creates area of refuge within which populations can buil...
What is a downside of marine conservation zones?
Large areas are required
How are seeds stored in a seed bank?
The seeds are dried and stored at -20 degrees
Give 4 examples of active management of wildlife reserves
controlled grazing
restricting human access
controlling poaching
culling/removal of invasive species
Give 2 examples of in situ conservation
marine nature reserves
| - land nature reserves
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| Term | Definition |
|---|---|
Define invasive species | An organism that is not native to an area and has negative effects on the economy, environment, or health |
Describe the role of marine conservation zones in maintaining biodiversity | vital in protecting species rich areas e.g. coral reefs
doesn't prevent fisherman in the area
creates area of refuge within which populations can build and repopulate adjacent areas |
What is a downside of marine conservation zones? | Large areas are required |
How are seeds stored in a seed bank? | The seeds are dried and stored at -20 degrees |
Give 4 examples of active management of wildlife reserves | controlled grazing
restricting human access
controlling poaching
culling/removal of invasive species |
Give 2 examples of in situ conservation | marine nature reserves
| - land nature reserves |
Give 3 examples of ex situ conservation | seed banks
botanic gardens
captive breeding programmes |
Why are seed banks used? | seeds stored so new plants may be grown in the future
| - stores seeds for reintroduction and research for breeding and genetic engineering in the future |
Give a problem with seed banks | Not all seeds are still viable after being frozen |
What are captive breeding programmes? | Offspring of endangered species are bred in a human controlled environment |
How do captive breeding programmes try to maintain genetic diversity? | an international catalogue of individuals' genealogical data is maintained
mating can be arranged to ensure genetic diversity is maximised |
Why might some captively bred organisms not be able to be released into the wild? | loss of resistance to local diseases
learned behaviour
genetic make-up of captive animals can become so different to original population they cannot interbreed
natural habitat must be restored before populations are introduced |
Give an advantage of in situ conservation | It enables a species to adapt continually to changing environmental conditions |
Give a disadvantage of ex situ conservation | It is very expensive, more expensive than in situ conservation |
What does IUCN stand for? | International union for conservation of nature |
What does the IUCN do? | assist in securing agreements between nations
| - publishes the red list showing status of threatened animals |
What does CITES stand for? | Convention on international trade in endangered species |
What does CITES do? | -regulates international trade of wild plants and animals and their products |
What was the Rio convention? | A meeting between 172 nations about how to maintain biodiversity |
Give 2 examples of agreements the Rio convention resulted in | CBD
| - UNCCD |
What does CBD stand for? | Convention on biological diversity |
What does UNCCD stand for? | United nations convention to combat desertification |
Give an example of a UK based conservation scheme | Countryside stewardship scheme |
Outline the countryside stewardship scheme | governmental payments offered to farmers to enhance and conserve the English landscape
restoring neglected land
local conservation schemes |