Ecology . Energy Transfer and nutrient recycling WALT How nutrients are recycled through an ecosystem The carbon cycle. Autotrophs in an Ecosystem are producers, the products that they make form the food that ultimately feed all of the organisms in the ecosystem.
Energy Transfer and nutrient recycling
How nutrients are recycled through an ecosystem
The carbon cycle
Each distinct level is called a trophic level
As one organism eats another there is a transfer of energy through the trophic levels
Energy transfer occurs in one direction only
These then pass along the food chains
Finally they are released back into the abiotic part of the ecosystem by decomposers
Carbon Dioxide in the atmosphere
Carbon in organic molecules in plants
respiration in plants
Carbon in organic molecules in animals
Respiration in animals
Respiration of decomposers
Carbon in dead organic matter
Carbon in fossil fuels
92% of global CO2 production is from respiration (over which we have no control) and only 2% is produced by all forms of transport!
Atmospheric CO2 levels are rising steadily (see right), but there is no way that humanity can stop this rise and even more uncertainty as to the consequences of this rise.
Plant growth will certainly increase, as lack of CO2 is the limiting factor for photosynthesis throughout the world (in summer, anyway).