Energy And Biomass In Food Chains Flashcards
Green plants and algae absorb
A small also unit of the light that reaches them
During photosynthesis,
The transfer from light energy to chemical energy occurs
Where is the energy stored
In the substances that make up the cells of the plants
The mass of living material (biomass) at each stage in a food chain is LESS than it was at the previous stage because
Some materials and energy are always lost inter organisms waste materials.
Respiration supples all the energy needs for living processes, including movement. Much of this energy is eventually transferred to the surroundings
The biomass at each stage can be drawn to scale and shown as a
Pyramid of biomass
The efficiency of food production can be improved by
Reducing the number of stages in a food chain
The efficiency of food production can also be improved by
Restricting energy loss from food animals by limiting their movement and by controlling the temperature of their surroundings
Fish stocks in the oceans are DECLINING. It is important to maintain fish stocks at a level where breeding continues, otherwise
Certain species may disappear altogether in some areas.
………………………….. And …………. Play an important role in the conservation of fish stocks
Net size and fishing quotas play an important role in the conservation of fish stocks.
Practical solutions for human needs may require compromise between competing priorities, including
The differences in efficiency between producing food from animals and plants.
The issues associated with farming of animals
The implications of food miles
…………remove materials from the environment for growth and other processes
Living organisms
These materials are returned to the environment either
In waste materials or when living things decay
Materials decay because
They are broken down (digested) by micro organisms.
Micro organisms are more active and digest more materials in
Warm, moist, aerobic conditions
The decay process releases
Substances that plants need to grow
