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Community Interactions &Food Chains, Webs & Pyramids Chapter 2.2
Trophic Level: Who eats who in the food chainSteps 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 foodSeveral food chains linked together More stable
Food Pyramid Tertiary Secondary Primary consumer Producer
Food Pyramid Tertiary Secondary consumer Primary consumer Producer
Food Pyramid Illustrates? Food Chain of numbers of biomass of energy
Food Pyramid activity heat heat activity 90%: Lost as Waste Used for10% of the energy is passed on as biomass 90%: Lost as Waste Used for Reproduction activity heat heat activity
Biomagnification Magnification= to increase Concentration of toxinsAre magnified In upper pyramid levels
Biomagnification the top consumer requires more biomassand concentrates the toxin
Food Pyramid Human Shark Bass Smelt Algae Who is most susceptible ?
Cycles in Nature:
Energy Flows………... Flows in one directionWill 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 reformedThe basic building blocks are reused Conservation of Matter
Tracing the cycling of matter…..
Energy & Matter in an Ecosystem:
What is Ecology?.
Food Chains and Food Webs
Energy flows through ecosystems.
Energy Flow in Ecosystems
I. Energy Flow A. Producers Make their own food through photosynthesis
Energy in Ecosystems MRS. PITTALUGA 8 TH GRADE SCIENCE.
ECOLOGY Food Chains and Food Webs 1. Food chain Notes FOOD CHAINS AND FOOD WEBS Energy flows through an ecosystem in a one way stream, from primary producers.
Ecology Ecology- Science of the interactions between organisms and their environment.
Energy Transfer & Nutrient Cycling
AIM: How is energy transferred in an ecosystem? DN: Explain the difference between a primary consumer, secondary consumer and tertiary consumer. HW: Article.
Principles of Ecology.
Chapter Energy Roles An organism’s energy role in an ecosystem may be that of a producer, consumer, or decomposer. An organism’s energy role is.
Consumers are not all alike. Herbivores eat only plants.
Trophic levels Determines the pathways of energy flow and nutrient cycling (more on this later) Different species in the ecosystem are divided into different.
Trophic Levels. Producers Primary Consumers Secondary Consumers.
Energy Flow How does energy move through the ecosystem?
Food Webs & Energy Pyramids
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