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  • Created by: Lauraa01
  • Created on: 27-12-13 10:12
What does an ecosystem include?
An ecosystem includes all living things and their surroundings
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What is a habitat?
An habitat is where and organism lives
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What is a community made up of?
A community is made up of the organisms living there
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What is a population?
A population is the number of a particular organism in a community
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What do native ecosystems have compared to artificial ecosystems?
Native ecosystems have a wider biodiversity than artificial ecosystems
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What is zonation?
Zonation is the gradual change in species across a habitat
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What can capture - recapture data be used to calculate?
Capture - recapture data can be used to calculate a population size estimate
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How do you work out population size?
Population size = number in 1st sample x number in 2nd sample / number in 2nd sample previously marked
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Three things that capture - recapture data assumes?
No deaths, immigration or emigration, identical sampling methods, survival rates not affected by marking organisms
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What can the distribution of organisms be mapped using?
The distribution of organisms can be mapped using a transect line and displayed as a kite diagram
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Two stages of the photosynthesis process?
Light energy splits water into oxygen gas and hydrogen ions, carbon dioxide gas combines with hydrogen to make glucose and water
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What is the balanced symbol equation for photosynthesis?
6CO + 6H O C H O + 6O
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What are leaves adapted for?
Leaves are adapted for efficient photosynthesis - large surface area, thin, contain pigments, have vascular bundles and guard cells
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Three limiting factors in photosynthesis?
Carbon dioxide, light and temperature
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What did isotope experiments show?
Isotope experiments showed that the oxygen comes from water
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What is diffusion?
Diffusion is the net movement of particles from a high concentration to a low concentration
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What is the rate of diffusion increased by?
The rate of diffusion is increased by: a shorter distance, a greater concentration gradient and a greater surface area
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What is transpiration?
Transpiration is the evaporation and diffusion of water from leaves
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What is the transpiration rate increased by?
Transpiration rate is increased by: increased light intensity, temperature, air movement and a decrease in humidity
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What is osmosis?
Osmosis is the net movement of water from a high to a low water concentration across a partially - permeable membrane
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What do plants require?
Plants require nitrates for cell growth, phosphates for respiration and growth, potassium for respiration and magnesium for photosynthesis
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What does organic farming use?
Organic farming uses animal manure, crop rotation, weeding and differing the planting times
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What are minerals absorbed by?
Minerals are absorbed by active transport which needs energy
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What do detritivores feed on?
Detritivores feed on dead and decaying material
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What do saprophytic fungi use?
Saprophytic fungi use extracellular digestion
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What does intensive food production improve?
Intensive food production improves the efficiency of energy transfer
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What does biological control use?
Biological control uses living organisms to control pests
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What is a hydroponic?
Hydroponics is a type of intensive farming
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What is intensive farming?
Intensive farming makes use of artificial pesticides and fertilisers
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What will cooling foods do?
Cooling foods will slow down bacterial and fungal growth and reproduction
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Card 2


What is a habitat?


An habitat is where and organism lives

Card 3


What is a community made up of?


Preview of the front of card 3

Card 4


What is a population?


Preview of the front of card 4

Card 5


What do native ecosystems have compared to artificial ecosystems?


Preview of the front of card 5
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