Download Ecosystems - Kylies

Ecosystems
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Ecosystems
 Abiotic
factors are non-living.
 Biotic factors are living.
 Sunlight is the primary source of energy in
ecosystems.
 10% of energy is transferred up through trophic
levels.
 The rest of the energy is used up in maintaining
the organism and heat.
 Herbivores are primary consumers.
Ecosystems
 Consumers
on the next level up are called
secondary consumers and are omnivores and
small carnivores.
 Tertiary consumers are medium or large
carnivores.
 Quaternary consumers are large carnivores.
 Larger species populations are found at lower
trophic levels. This is as result of the small level
of energy that is transferred up from each level.
Species Interactions
 Predation
has a predator and its prey. One
species benefits and one species is harmed.
 Competition is where species compete for
available resources including food and shelter.
 Mutualism is an interaction where both species
benefit.
 Parasitism is where one species benefits and
the other is harmed but not killed.
 Commensalism is when one species benefits
and the other species is neither harmed nor
benefits.
Photosynthesis/Respiration
 Photosynthesis
takes
in carbon dioxide and
water and produces
oxygen and glucose.
 Cellular respiration
uses oxygen and
glucose and releases
carbon dioxide and
water into the
atmosphere.