Bristol, Mumbai, Ecosystems, Cold environments Flashcards
Biotic
Organisms found in an ecosystem
Abiotic
The non-living elements of an ecosystem
Ecosystem
A community of plants and animals sharing an environment with non-living things
Consumer
Organisms that consume other organisms to obtain their energy
Producer
Organisms that produce their own foods
Decomposer
Organisms that break down dead plants and animals
Food chain
The flow of energy from producer to tertiary consumer
Food web
A diagram showing lots of food chains and how they overlap
Nutrient cycle
The transfer of nutrients through an ecosystem
How do ecosystems adapt to natural changes
Slow changes - little effects
Rapid changes - harmful
Examples of human changes to ecosystems
Cutting down trees - destroys habitats
Agricultural fertilisers - eutrophication - nitrates inclearse algae - depleted oxygen - fish die
Name the biomes
Tropical rainforest
Boreal forest
Savanna
Tundra
Desert
Mountains
Chaparral
Polar ice
Temperate forest
Temperate grassland
What is the climate in a tropical rainforest
High temperate and high rainfall
27 degrees and 200mm/month
Forest floor
Decomposition
Low level of growth
<2% light
<10m
Undercanopy
2-15% light
Young trees + herbaceous plants
Still air
10-20m
Canopy
90% of organisms
80% of light is absorbed
Plants ( epiphytes ) absorb nutrients from the air
20-30m
Emergent
Strong winds + hot temps
Tall trees
Greatest amount of sunlight
30-50+m
Why are rainforest soils infertile
Latosol - rich in aluminium and iron, infertile due to rainfall leaching ( washing ) nutrients out of soil
Features of Peninsular Malaysia - Main Range
1 hectare = 300 tree species
Canopy 60-100m
Tallest flowering plant in the world
Home to over 25% of all plants in Malaysia
Many undiscovered covered plants
Economic gains from deforestation - rainforests
Development of land for mining, farming and energy = jobs in construction or supply
Companies pay taxes to government
Raw materials harvested
Economic losses from deforestation - rainforests
Pollution of water + dry climate = shortage of water
Increased temperature = no farming
Fires = pollution
Reasons to protect rainforests
Biodiversity
Climate change
Medicine
Resources
Water
Biodiversity in rainforests
Contain half the plant and animal species worldwide
Climate change in rainforests
28% of oxygen comes from rainforests - ‘lungs of the world’