Food Web Dynamics and Productivity Movement In Ecosystems Big Idea 4: Biological Systems Interact
Essential Knowledge 4.A.6: Interactions among living systems and with their environment result in the movement of matter and energy.
Energy Flows in Ecosystem Producers Consumers Decomposers
Producers: Phototrophs Use sun to produce sugar (PS) Plants, Algae (Phytoplankton), Bacteria PS is 1 % efficient!
Producers: Chemotrophs Use H2S to produce sugars (chemosynthesis) Bacteria
Consumers: Heterotrophs Break down stored sugars (aerobic respiration) C6H1206 + 6H2O + 6O2 6CO2 +12H2O+ Energy (36 ATP)
Primary producers get eaten by…. Simplified Food Chain Primary producers get eaten by….
Primary consumers get eaten by… Simplified Food Chain Primary consumers get eaten by…
Secondary consumers get eaten by… Simplified Food Chain Secondary consumers get eaten by…
Tertiary consumers get eaten by… Simplified Food Chain Tertiary consumers get eaten by…
Importance of Decomposers Make vital elements available to primary producers. Convert organic material into inorganic materials (producers can use in soil/ H2O)
Are dependent upon primary productivity!!! Food Chains and Webs Are dependent upon primary productivity!!!
Gross Primary Productivity (GPP) Rate at which energy is captured during PS and stored. LOW HIGH
Net Primary Productivity (NPP) Energy that remains in producers after respiration; biomass available to consumers NPP = GPP - Resp. Energy that is available to consumers!
Math Calculations! 15 minutes
Energy Flows, But Matter is Recycled Energy Flows, But Matter is Recycled! Biogeochemical Cycles: C, N, and Water
Nitrogen Cycle Video Clip Science Girls…