Sample
Summaries after sample
,Sample
Summaries after sample
, Energy flow: food chains
Balance in an ecosystem and food webs Food chains
An ecosystem needs to Plants and algae • Biotic and abiotic factors interact to
maintain stability.
be in balance • Capture sunlight energy through • Energy is passed from plants to animals in
photosynthesis. the food chain.
• Everything in ecosystems is interdependent.
• Natural factors that disrupt the balance in •
ecosystems = drought, floods and sudden
temperature changes.
• Human factors that disrupt the balance in
Decomposers
ecosystems = removing organisms from • Decomposers break down the bodies of plants
Sample
ecosystems, destroying natural habitats and
pollution. T2: Interactions
and
interdependence
and animals - releases decayed material back to
the soil.
• Green plants use this material to produce food.
• Decomposers release energy.
• Food chains depict energy flow through the
within the ecosystem, arranged in a specific order.
Summaries after sample environment (B) •
Trophic levels
• Food chains are also represented using energy
pyramids - indicate the energy availability from
each group of organisms in an ecosystem.
• Each group forms a trophic level.
Food webs • Less energy reaches higher levels in the pyramid.
• Shows a series of food chains in an •
ecosystem.
• Producers are at the bottom, herbivores
are in the second row, and carnivores Energy transfer and energy loss
are on top.
• Organisms use 90% of their food to live and grow.
•
• 10% is stored in their bodies.
•
T1-T2 Via Afrika Copyright © www.summariessa.co.za (DO NOT COPY)
GR8
NS Mind Map
Summaries after sample
,Sample
Summaries after sample
, Energy flow: food chains
Balance in an ecosystem and food webs Food chains
An ecosystem needs to Plants and algae • Biotic and abiotic factors interact to
maintain stability.
be in balance • Capture sunlight energy through • Energy is passed from plants to animals in
photosynthesis. the food chain.
• Everything in ecosystems is interdependent.
• Natural factors that disrupt the balance in •
ecosystems = drought, floods and sudden
temperature changes.
• Human factors that disrupt the balance in
Decomposers
ecosystems = removing organisms from • Decomposers break down the bodies of plants
Sample
ecosystems, destroying natural habitats and
pollution. T2: Interactions
and
interdependence
and animals - releases decayed material back to
the soil.
• Green plants use this material to produce food.
• Decomposers release energy.
• Food chains depict energy flow through the
within the ecosystem, arranged in a specific order.
Summaries after sample environment (B) •
Trophic levels
• Food chains are also represented using energy
pyramids - indicate the energy availability from
each group of organisms in an ecosystem.
• Each group forms a trophic level.
Food webs • Less energy reaches higher levels in the pyramid.
• Shows a series of food chains in an •
ecosystem.
• Producers are at the bottom, herbivores
are in the second row, and carnivores Energy transfer and energy loss
are on top.
• Organisms use 90% of their food to live and grow.
•
• 10% is stored in their bodies.
•
T1-T2 Via Afrika Copyright © www.summariessa.co.za (DO NOT COPY)
GR8
NS Mind Map
