Energy and Biomass in Food Chains and Waste Materials from Animals and Plants
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- Created on: 08-06-14 15:11
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- Energy and Biomass in Food Chains
- Waste Material from Animals and Plants
- Decay: Living things remove materials from their environment through processes such as decay.
- Micro-organisms break down waste/dead organisms. This decay process releases substances used by plants for growth.
- Animal ?(death/waste)? Animal dies ?(broken down by micro-organisms)?Animal decomposed ?(absorption)?Plants grow?(eaten by animals)
- The Carbon Cycle: CO2 removed from atmosphere by photosynthesis, some CO2 returned by respiration.
- Carbon dioxide is obtained by photosynthesis which makes carbohydrates, fats and proteins for plants, which is eaten by animals.
- Animals respire, releasing CO2. Organisms die and micro-organisms break down organisms (decomposers)
- As detritus feeders eat dead organisms, they respire and release CO2. (combustion also releases CO2)
- Garden Waste (+): less methane produced, less litter in landfill, plants have nutrients, produce bio-gas and fertilizers.
- Garden Waste (-): food waste items cannot be composted at home, waste left lying around will attract vermin, fewer than 1/2 councils offer food waste recycling.
- Food chains: energy is transferred from one organism to another (producer ?consumer). The sun is the main source of energy.
- Energy in biomass is lost through faeces, respiration, heat and movement.
- Warm blooded animals' bodies were kept at a constant temperature which is higher than their surroundings.
- Pyramid of biomass: always looks like a pyramid. Pyramid of numbers: doesn't always look like a pyramid
- Not all the energy is passed in the pyramid due to respiration and faeces
- Biomass is the mass of living material, producers are placed at the bottom. The pyramid represents the total biomass at each stage not the number of organisms.
- Waste Material from Animals and Plants
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