The combination of all the organisms
in a given area and the abiotic elements which affect them.
An ecosystem is an open system because it can exchange
energy or materials with other ecosystems.
Earth is a closed system with respect to nutrients and
chemicals, but open with respect to energy.
Two processes:
* one
way flow of energy - Fig
1.7 - Fig
54.1
sunlight
-> producers -> consumers
* cycling of nutrients
Gross Primary Production (GPP)
Net
Primary Production (NPP) - Fig
54.4
Limiting factor - Fig
54.6
Secondary production - Fig
54.10
Energy Partitioning within a Link of the Food Chain
Trophic Efficiency and Ecological Pyramids
Biogeochemical Cycles
A general model of nutrient cycling - Fig 54.15
Water Cycle - Fig 54.16
Carbon Cycle - Fig
54.17
Photosynthesis
Respiration
Major reservoirs:
Nitrogen Cycle - Fig 54.18
Phosphorous Cycle - Fig 54.19
A review of nutrient cycling - Fig 54.20