Karteikarten
Biodiversity general questions
Karten in diesem Stapel (14)
- 1Define biodiversitythe variety of genes, species and ecosystems in an area
- 2define biospherethe thin veneer of living material on the planet's surface
- 3define biomea global scale ecosystem e.g tropical rainforest
- 4define biomassthe total weight of living matter per unit area
- 5What is a biodiversity hotspot? Give examples.Areas with
> high species richness
> high levels of endemism
> often facing severe human threats
e.g. Indo-Burma hotspot &
Philippines hotspot - 6Why are island habitats often ideal for biodiversity? E.g Micronesia> Lack of factors to limit growth (plenty of light, warmth and rain)
> Decay and nutrient cycling is rapid
> Isolation limits human influence
> large areas to support large species numbers
> Evolution 'goes its own way'
> Altitude means that one island can provide habitats for different species - 7Describe the Indo-Burma hotspot> covers more than 2million km2 of tropical Asia
> 6 large species discoveries in the last 12 years
> High numbers of endemic freshwater turtle species
> almost 1300 different bird species - 8Describe the Philippines hotspot> more than 7100 islands make up the Philippines hotspot
> One of the world's most biologically diverse areas
> many endemic species
> 6000 plant and bird species - 9What are the 3 main factors that influence biodiversity?1. The climate (precipitation, light intensity, wind etc.)
2. Endemism (species that are unique to a certain area e.g. 90% of Hawaii's plant species are not found anywhere else)
3. Human activity (threat to biodiversity) - 10how can human activity impact biodiversity?Human activity changes ecosystems structures, fragmenting them and altering land use by...
> loss and degradation of habitats
> over-exploitation
> introduction if invasive species
> pollution
> climate change - 11What are the 4 ecosystem services?1. Supporting (nutrient cycling, soil formation, primary production)
2. Provisioning (food, fresh water, wood/fibre, fuel)
3. Regulating (climate, food, disease, water purification)
4. Cultural (aesthetic, spiritual, educational, recreational) - 12What are the 5 constituents of well-being?1. Security
2. Basic material for good life
3. Health
4. Good social relations
5. Freedom of choice and action - 13What is the value of coral reefs?1. Biodiversity (25% of marine fish)
2. shoreline protection
3. Food
4. Medicine
5. The aquarium trade
6. Decorative objects (regulated by law)
7. Building materials
8. Education and research
9. Tourism - 14What are the social, economic and environmental of rabbits in Australia?Social: displacement of farmers and their families, spread of Myxomatosis can affect pets
Economic: abandoned farms = loss of income
Environmental = change to the landscape
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- A Levels Geography (Biodiversity) Karteikarten am Biodiversity general questions, erstellt von libbystraw1 am 03/01/2015.
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