chapter 2.2 trophic level: who eats who in the food chain steps along which materials & energy...
TRANSCRIPT
Chapter 2.2
Trophic Level:• Who eats who in the food
chain• Steps along which materials
& energy pass• Shown as food chains, webs &
pyramids
Food Chain:
• ONLY ONE source of food
• Less stable
Food Web:• More than one
choice of food
• Several food chains linked together
• More stable
• Tertiary• Secondary• Primary consumer• Producer
• Tertiary• Secondary consumer• Primary consumer• Producer
Illustrates?
Food Chain
• of numbers
• of biomass
• of energy
10% of the energy is passed on as biomass
90%:• Lost as• Waste • Used for• Reproduction
• Magnification=
to increase
• Concentration of toxins
• Are magnified
• In upper pyramid levels
• the top consumer
• requires more biomass
• and concentrates the toxin
• Human
• Shark
• Bass
• Smelt
• AlgaeWho is most susceptible ?
Cycles in Nature:
Energy Flows………...
• Flows in one direction
• Will never return to the same form
• Conservation of Energy:
• Energy changes form
• But is never lost
Matter cycles…………..• Matter can be
recycled• Matter can be
reformed• The basic building
blocks are reused• Conservation of
Matter
Carbon cycle………...
Tracing the cycling of matter…..
Energy & Matter in an Ecosystem: