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What is an ecosystem?
an ecosystem is the interaction between living things (biota) and none living things of the surrounding area.
imputs and outputs of the forest
Biotic inhabitants of an ecosystem
- Red squirrel
- field mice
- fruit bat
- decomposers (maggots, worms, beetles, fungi)
Abiotic inhabitants of an ecosystem
- sunlight/ climate
* top carnivores X
Explain the trophic pyramid and how it works.
The energy used in a trophic pyramid is solar energy. Energy is lost as you move up the pyramid because as there are more organisms at the bottom, they use the most heat energy that they use to move. This means that the top trophic level with the least organisms receives the least energy from the sun.
What is climate and how does it affect us?
Climate is the weather conditions which prevail in an area in general or over a long period.
CLIMATE (WEATHER) =
The soil. The climate is the reason for how dry or moist the soil is to grow crops.
Vegetation. Vegetation has developed to suit the climate and the soil.
The animals. They all feed on plants or each other.
Give examples of ecosystems.
- A pond
- A rainforest
- Your back garden
- A field of flowers
What is a food chain?
A series of organisms dependant on the next as a source of food.
Simple food chain
What is a biome?
A biome is a very large ecological area on the earth's surface with fauna and flora (animals and plants) adapting to its environment. Biomes are often defined by their abiotic factors.
What is the difference between an ecosystem and a biome?
An ecosystem may technically cover a few square metres or cover a portion of a continent and is an interaction between biotic and abiotic inhabitants. A biome is a large geographic area defined by characteristic climate features and dominant plant life.
Give examples of biomes.
- Tundra biomes
- Grassland biomes
- aquatic biomes
- desert biomes
Layers of the rainforest
How big is the Amazon rainforest?
5.5 million sq. KM
Where is the amazon rainforest
Brazil (covers around 60%)
How many species of plant/ animal live in the rainforest?
More than 5 million species of plants, animals and insects call the rainforest home.
Why should the Amazon not be destroyed?
One main reason would be that the amazon provides more than 20% of the world's oxygen and the trees absorb Co²
Millions of animals, plants and insects would be lost forever
Greenhouse gases will ruin the earth's ozone layer protecting us from the sun's harmful rays and will pollute the earth
Tribal groups will be killed
Flooding will be more likely to occur
Precipitation rates will decline
Unique ecosystems will be lost
Why should the amazon be cut down?
The number of slums and poverty are increasing because of a lack of room to build accommodation
Extremely valuable iron mines have been discovered underneath
it's been said that Brazil feeds the world because of its extremely fertile soil and would be incredible for growing things like grain and soybeans.
There would be unbelievable amounts of lands that could be used for agriculture, industry, cities and roads
Hydroelectric power can be generated
What is a drainage basin?
A drainage basin is an area of land where all surface water from rain, melting snow or ice converges to a single point at a lower elevation, usually the exit of a basin, where the water joins another body of water like the sea, a river, a lake etc
- Drainage basin- an area of land drained by a river
- catchment area- the area within the drainage basin
- Watershed- the edge of highland surrounding a drainage basin. It marks the boundary between 2 basins
- Source- The beginning/ start of a river
- Confluence- The point where 2 rivers or streams join
- tributary- a smaller stream/river which joins a larger stream/river
- mouth- the point at which a river ends, usually leading into the sea
The water cycle
The 3 stages of erosion are….
- 1. EROSION - materials are picked up
- 2. TRANSPORT - material is carried away
- 3. DEPOSITION - material is dropped and repositioned