Ecosystem1. Energy & Material Flows 2. Biogeochemical Cycles 3. Organismsenergy cannot be created or
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destroyed; but it may be converted
When energy changes form it is degraded to a less organized (and less useful) form; systems tend to move toward higher entropy levels
Entropy
higher
lower
energy inputs
autotroph
heterotroph
cellular respiration
opposites
fungi
bacteria
chemosynthesis
protista
Gross Primary Productivity
carbon fixation
Net Primary Productivity
NET Primary Productivity + Plant Respiration
-Sunlight -Water -Nutrients
Biomass
biomass
Food web
primary producers
secondary producers
primary
secondary
tertiary
omnivore
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