food webs within ecosystems marine, freshwater, and terrestrial food webs
TRANSCRIPT
Food Webs Within Ecosystems
Marine, Freshwater, and Terrestrial
FOOD WEBS
Ecosystems
• An ecosystem is a community of organisms interacting with one another and their environment.
• An ecosystem includes all biotic and abiotic factors.– Biotic Factors – All living things
• Plants, animals, fungi and bacteria
– Abiotic Factors – All nonliving things• Water, land, light, temperature and soil composition.
Marine Ecosystems
Oceans
Freshwater Ecosystems
Lakes, ponds, rivers, streams and aquifers
Terrestrial Ecosystems
Forests, Deserts, Grasslands, Mountains
Habitat
A habitat is a place where an organism lives.
Population
A population is a group of individuals of the same species that live in a certain area.
Community
A community is all of the populations that live and interact with each other in an area.
Niche
A niche is the role of an organism
within it’s community.
Includes what it eats, when it eats
and where it lives.
Coral, plankton, fish
Food Chain
A food chain shows how the
energy in food is passed from organism to
organism in an ecosystem.
Food Web
A food web is a combination of
all the overlapping
food chains in an ecosystem.
Producers
• Producers are organisms that make their own food through photosynthesis.
• Examples – plants, algae and plankton
Consumers
• Consumers are organisms that eat other organisms to obtain food for energy.
There are 3 Types of Consumers
• Herbivores – Animals that only eat plants
• Omnivores – Animals that eat plants and other animals
• Carnivores – Animals that only eat other animals (meat)
• Primary Consumer
• Secondary Consumer
• Tertiary Consumer
Predator/Prey Relationships
• Predator – Organism that eats another organism
• Prey – Organism that is eaten by the predator
Parasite/Host Relationships
• Parasite – organism that feeds off other living creatures – Fleas, Ticks, Worms, Lice, etc.
• Host – organism on which the parasite is feeding. Always bad for host!
Decomposers
• A decomposer is an organism that gets their energy by breaking down dead organisms.